Radio frequency ablation device

Abstract

The invention relates to a radiofrequency ablation device which comprises a sheath tube unit, a guide tube unit and an electrode needle unit. The far end of the guide tube unit is exposed through the opening element of the sheath tube unit, the far end of the electrode needle unit is far away from the far end of the guide tube unit and reaches a radiofrequency ablation position, and the electrode needle unit carries out radiofrequency ablation operation. The radiofrequency ablation device has the advantages that a single handheld terminal is formed through integrated design of puncture, guide and ablation in radiofrequency ablation, errors caused by cooperation of multiple steps are eliminated, meanwhile, the structure is short in learning curve and fast to operate, and in the process, the electrode needle unit can play a role in radiofrequency ablation and can complete puncture of a target ablation position at the same time; the purpose of accurately conveying the electrode to the ablation position is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of nerve ablation devices, and particularly to a radiofrequency ablation device. Background Art

[0002] As a core means of minimally invasive interventional therapy, radiofrequency ablation technology is widely used in the fields of tumor, arrhythmia and pain treatment. The current technology has the following pain points:

[0003] 1) Operational complexity: Traditional devices require split-type operation. For example, the puncture needle, energy generator and imaging guidance system operate independently. The operator needs to frequently switch tools and rely on the cooperation of assistants, resulting in a cumbersome operation process, which is particularly unfavorable for precise intervention of deep or tiny nerve targets.

[0004] 2) Insufficient positioning accuracy: The positioning of the target nerve mostly relies on external imaging devices (such as ultrasound, X-ray or CT). During the operation, the puncture path needs to be adjusted repeatedly, and it is easy to generate positioning deviation due to the change of the patient's position or the displacement of organs, increasing the risk of non-target tissue damage.

[0005] 3) Ergonomic defects: The handle design of existing devices is not optimized for single-handed operation. The operator needs to hold the puncture needle and energy controller with both hands, and it is difficult to synchronously complete the fine position adjustment and energy release in a complex anatomical environment, affecting the surgical efficiency and safety.

[0006] In recent years, although improved devices have improved some performances by integrating imaging modules or automated puncture mechanisms, the following core problems have not been solved:

[0007] 1) Device discreteness: Puncture, guidance, ablation separation, resulting in multiple operations during the operation, increasing the risk of operation interruption;

[0008] 2) Steep learning curve: Multi-step operations require the operator to have high experience, restricting the popularization of the technology in primary medical institutions.

[0009] In view of the above pain points, there is an urgent need in this field for an integrated and ergonomic radiofrequency ablation device, which integrates puncture, guidance, energy output and real-time feedback functions through an integrated design, realizes precise positioning and stable ablation under single-handed operation, thereby improving surgical safety and reducing the technical application threshold. Summary of the Invention

[0010] The object of the present invention is to propose a method for radiofrequency ablation, especially a radiofrequency ablation device, in view of the deficiencies in the prior art, so as to solve problems such as device discreteness and steep learning curve existing in the related technology. The present invention adopts the method of radiofrequency ablation (RFA), which can be applied to soft tissues, hard tissues or natural cavities, and the radiofrequency ablation in the vertebral body is taken as an example for illustration hereinafter.

[0011] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0012] A radiofrequency ablation device, comprising:

[0013] A sheath tube unit, an opening element is provided at the end or side of the distal end of the sheath tube unit;

[0014] A guiding tube unit, the guiding tube unit is movably disposed inside the sheath tube unit, and is used for reciprocating movement along the axial direction of the sheath tube unit so that the distal end of the guiding tube unit exposes through the opening element of the sheath tube unit;

[0015] An electrode needle unit, the electrode needle unit is movably disposed inside the guiding tube unit, and is used for reciprocating movement along the axial direction of the guiding tube unit;

[0016] Wherein, the distal end of the guiding tube unit exposes through the opening element of the sheath tube unit, the distal end of the electrode needle unit is far from the distal end of the guiding tube unit to reach the radiofrequency ablation position, and the electrode needle unit performs radiofrequency ablation operation.

[0017] In some of the embodiments, it further comprises:

[0018] A first screw driving unit, the first screw driving unit is connected to the proximal end of the guiding tube unit, and is used for driving the guiding tube unit to reciprocate along the axial direction of the sheath tube unit;

[0019] A second screw driving unit, the second screw driving unit is connected to the proximal end of the electrode needle unit, and is used for driving the electrode needle unit to reciprocate along the axial direction of the guiding tube unit.

[0020] In some of the embodiments, it further comprises:

[0021] An electric driving unit, the electric driving unit is respectively connected to the guiding tube unit and the electrode needle unit, and is used for respectively driving the guiding tube unit to reciprocate along the axial direction of the sheath tube unit and the electrode needle unit to reciprocate along the axial direction of the guiding tube unit.

[0022] In some of the embodiments, it further comprises:

[0023] A linkage unit, the linkage unit is detachably connected to the guiding tube unit and is connected to the electrode needle unit, and is used for enabling the guiding tube unit and the electrode needle unit to move simultaneously when connected to the guiding tube unit or enabling the electrode needle unit to move alone when separated from the guiding tube unit;

[0024] A connecting rod drive unit, which is connected to the proximal end of the electrode needle unit and is used to drive the electrode needle unit to reciprocate axially along the guide tube unit.

[0025] In some embodiments, it further includes:

[0026] A linkage unit, which is detachably connected to the guide tube unit and is connected to the electrode needle unit, and is used to make the guide tube unit and the electrode needle unit move simultaneously when connected to the guide tube unit or make the electrode needle unit move alone when separated from the guide tube unit;

[0027] A meshing drive unit, which is connected to the proximal end of the electrode needle unit and is used to drive the electrode needle unit to reciprocate axially along the guide tube unit.

[0028] In some embodiments, it further includes:

[0029] A linkage unit, which is detachably connected to the guide tube unit and is connected to the electrode needle unit, and is used to make the guide tube unit and the electrode needle unit move simultaneously when connected to the guide tube unit or make the electrode needle unit move alone when separated from the guide tube unit;

[0030] A ratchet drive unit, which is connected to the proximal end of the electrode needle unit and is used to drive the electrode needle unit to reciprocate axially along the guide tube unit.

[0031] In some embodiments, it further includes:

[0032] A handle unit, which is respectively connected to the guide tube unit, the electric drive unit, the connecting rod drive unit, the meshing drive unit or the ratchet drive unit, and is used to fix the guide tube unit, the electric drive unit, the connecting rod drive unit, the meshing drive unit or the ratchet drive unit.

[0033] The present invention adopts the above technical solutions, and compared with the prior art, has the following technical effects:

[0034] The radiofrequency ablation device of the present invention integrates puncture, guiding, and ablation through an integrated design to form a single handheld terminal, eliminating errors caused by multi-step coordination. At the same time, this structure has a short learning curve and is easy to operate. During this process, the electrode needle unit can not only play the role of radiofrequency ablation but also complete the puncture of the target ablation position, achieving the purpose of accurately delivering the electrode to the ablation position; the sheath tube unit can easily break through the cortical bone, facilitating the electrode needle unit to reach the radiofrequency ablation position; the sheath tube unit has a marking function for precise positioning; the sheath tube unit, the guiding tube unit, and the electrode needle unit are integrally arranged, with simple and convenient operation, reducing the operation steps and improving the operation efficiency; by using the spiral cooperation between the first spiral driving unit and the guiding tube unit and the spiral cooperation between the second spiral driving unit and the electrode needle unit, the moving speed and moving position of the guiding tube unit and the electrode needle unit can be accurately controlled, facilitating the precise control of the guiding tube unit and the electrode needle unit; by using the electric cooperation between the electric driving unit and the guiding tube unit and the electrode needle unit respectively, the moving position of the guiding tube unit and the electrode needle unit can be accurately controlled, facilitating the precise control of the guiding tube unit and the electrode needle unit; by using the linkage cooperation between the linkage unit and the guiding tube unit and the electrode needle unit, the electrode needle unit can move independently or the guiding tube unit and the electrode needle unit can move simultaneously, thus achieving precise control; by using the linkage driving cooperation between the link driving unit and the electrode needle unit, the moving position of the electrode needle unit can be accurately controlled, facilitating the precise control of the electrode needle unit; by using the gear-rack driving cooperation between the meshing driving unit and the electrode needle unit, the moving speed and moving position of the electrode needle unit can be accurately controlled, facilitating the precise control of the electrode needle unit; by using the ratchet driving cooperation between the ratchet driving unit and the electrode needle unit, the moving speed and moving position of the electrode needle unit can be accurately controlled, facilitating the precise control of the electrode needle unit; by using the handle unit, it is convenient for the operator to operate with one hand, liberating the operator and improving the operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram (I) of the radiofrequency ablation device according to an embodiment of the present invention;

[0036] Figure 2 is a schematic diagram (II) of the radiofrequency ablation device according to an embodiment of the present invention;

[0037] Figure 3 is a schematic diagram (I) of the sheath tube unit according to an embodiment of the present invention;

[0038] Figure 4 is a schematic diagram (I) of the guiding tube unit according to an embodiment of the present invention;

[0039] Figure 5 is a schematic diagram (I) of the electrode needle unit according to an embodiment of the present invention;

[0040] Figures 6a - 6c It is a schematic diagram of the usage process of the radiofrequency ablation device according to an embodiment of the present invention;

[0041] Figure 7 It is a schematic diagram (III) of the radiofrequency ablation device according to an embodiment of the present invention;

[0042] Figure 8 It is a schematic diagram (II) of the guiding tube unit according to an embodiment of the invention;

[0043] Figure 9 It is a schematic diagram (II) of the electrode needle unit according to an embodiment of the present invention;

[0044] Figure 10 It is a schematic diagram of the first spiral drive unit according to an embodiment of the present invention;

[0045] Figure 11 It is a schematic diagram of the second spiral drive unit according to an embodiment of the present invention;

[0046] Figure 12 It is a schematic diagram (IV) of the radiofrequency ablation device according to an embodiment of the present invention;

[0047] Figure 13 It is a schematic diagram (II) of the sheath tube unit according to an embodiment of the present invention;

[0048] Figure 14 It is a schematic diagram (III) of the guiding tube unit according to an embodiment of the present invention;

[0049] Figure 15 It is a schematic diagram (III) of the electrode needle unit according to an embodiment of the present invention;

[0050] Figure 16 It is a schematic diagram of the electric drive unit according to an embodiment of the present invention;

[0051] Figure 17 It is a schematic diagram (V) of the radiofrequency ablation device according to an embodiment of the present invention;

[0052] Figure 18 It is a schematic diagram (IV) of the guiding tube unit according to an embodiment of the present invention;

[0053] Figure 19 It is a schematic diagram (IV) of the electrode needle unit according to an embodiment of the present invention;

[0054] Figure 20 It is a schematic diagram of the linkage unit according to an embodiment of the present invention;

[0055] Figure 21 It is a schematic diagram of the connecting rod drive unit according to an embodiment of the present invention;

[0056] Figure 22Schematic diagram (VI) of a radiofrequency ablation device according to an embodiment of the present invention;

[0057] Figure 23 Schematic diagram (V) of an electrode needle unit according to an embodiment of the present invention;

[0058] Figure 24 Schematic diagram of an engagement drive unit according to an embodiment of the present invention;

[0059] Figure 25 Schematic diagram (VII) of a radiofrequency ablation device according to an embodiment of the present invention;

[0060] Figure 26 Schematic diagram (VI) of an electrode needle unit according to an embodiment of the present invention;

[0061] Figure 27 Schematic diagram of a ratchet drive unit according to an embodiment of the present invention;

[0062] Figure 28 Schematic diagram (I) of a handle unit according to an embodiment of the present invention;

[0063] Figure 29 Schematic diagram (II) of a handle unit according to an embodiment of the present invention;

[0064] Figure 30 Schematic diagram (III) of a handle unit according to an embodiment of the present invention;

[0065] Figure 31 Schematic diagram (IV) of a handle unit according to an embodiment of the present invention.

[0066] The reference numerals therein are: 100, sheath tube unit; 101, sheath tube element; 102, opening element; 103, first sliding element; 200, guide tube unit; 201, guide tube element; 202, first threaded element; 203, second sliding element; 204, first link element; 205, first movable element; 206, first linkage element;

[0067] 300, electrode needle unit; 301, electrode needle element; 302, groove element; 303, electrode plate element; 304, second threaded element; 305, second link element; 306, second movable element; 307, second linkage element; 308, third link element; 309, fifth movable element; 310, first rack element; 311, third rack element;

[0068] 400, first screw drive unit; 401, first control element; 402, third threaded element; 403, gripping element;

[0069] 500. Second screw drive unit; 501. Second control element; 502. Fourth threaded element;

[0070] 600. Electric drive unit; 601. Third control element; 602. Third moving element; 603. Fourth moving element; 604. First rotating element; 605. Second rotating element; 606. Third rotating element; 607. Fourth rotating element; 608. First limiting element; 609. Second limiting element; 610. Third limiting element; 611. Fourth limiting element;

[0071] 700. Linkage unit; 701. Third linkage element; 702. Fourth linkage element; 703. Fifth linkage element;

[0072] 800. Link drive unit; 801. Fourth control element; 802. Sixth moving element; 803. Fifth rotating element;

[0073] 900. Meshing drive unit; 901. Fifth control element; 902. Second rack element; 903. First gear element; 904. Second gear element; 905. Sixth rotating element; 906. Seventh rotating element;

[0074] 1000. Ratchet drive unit; 1001. Sixth control element; 1002. Fourth rack element; 1003. First ratchet element; 1004. Second ratchet element; 1005. Third gear element; 1006. Fourth gear element; 1007. Fifth gear element; 1008. Seventh control element; 1009. Eighth control element; 1010. Eighth rotating element; 1011. Ninth rotating element; 1012. Tenth rotating element; 1013. Fifth limiting element; 1014. Sixth limiting element; 1015. Seventh limiting element; 1016. Eighth limiting element; 1017. Reset element;

[0075] 1100. Handle unit; 1101. First handle element; 1102. First outlet element; 1103. Second handle element; 1104. Second outlet element; 1105. Ninth limiting element; 1106. Tenth limiting element; 1107. Eleventh limiting element; 1108. Twelfth limiting element; 1109. Eleventh rotating element; 1110. Twelfth rotating element; 1111. Thirteenth rotating element; 1112. Fourteenth rotating element; 1113. Third sliding element; 1114. Fourth sliding element; 1115. Fifteenth rotating element; 1116. Sixteenth rotating element; 1117. Thirteenth limiting element; 1118. Fourteenth limiting element; 1119. Fifteenth limiting element; 1120. Sixteenth limiting element. Detailed implementation mode

[0076] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0077] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0078] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but it is not limited to the present invention.

[0079] Embodiment 1

[0080] A schematic embodiment of the present invention, as Figures 1 - 2 shown, a radiofrequency ablation device includes a sheath tube unit 100, a guiding tube unit 200, and an electrode needle unit 300. Among them, an opening element 102 is provided at the distal end or side of the sheath tube unit 100; the guiding tube unit 200 is movably arranged inside the sheath tube unit 100 for reciprocating movement along the axial direction of the sheath tube unit 100 so that the distal end of the guiding tube unit 200 is exposed through the opening element 102 of the sheath tube unit 100; the electrode needle unit 300 is movably arranged inside the guiding tube unit 200 for reciprocating movement along the axial direction of the guiding tube unit 200.

[0081] For the radiofrequency ablation device of the present invention, it can be applied to scenarios such as tumor radiofrequency ablation, intracardiac radiofrequency ablation, and intramedullary radiofrequency ablation.

[0082] Among them, the distal end of the guiding tube unit 200 is exposed through the opening element 102 of the sheath tube unit 100, the distal end of the electrode needle unit 300 is far from the distal end of the guiding tube unit 200 to reach the radiofrequency ablation position, and the electrode needle unit 300 performs radiofrequency ablation operations.

[0083] Among them, the sheath tube unit 100 is applicable to applications in soft tissues, hard tissues, or natural cavities. When a cavity needs to be established, an opening element 102 is provided at the distal end or side of the sheath tube unit 100, and the distal end is sharp; when applied to a natural cavity, that is, when no cavity needs to be established, an opening element 102 is provided at the side of the distal end of the sheath tube unit 100, and the distal end is hemispherical.

[0084] Generally, the intraoperative access angle range of the sheath tube unit 100 forms an angle of 5 - 45° with the sagittal plane and an angle of 10 - 30° with the horizontal plane.

[0085] Generally, a power connection interface is provided at the proximal end of the electrode needle unit 300. Among them, the power connection interface includes the power input of the electrode needle.

[0086] Generally, the output power of the radiofrequency ablation device is 20 - 100 W, the output frequency is 300 - 600 kHz, the controlled temperature range is 40 - 100 °C, and the temperature change rate is 0 - 50 °C / s.

[0087] As Figure 3 shown, the sheath tube unit 100 includes a sheath tube element 101 and an opening element 102. Among them, a guiding tube unit 200 is movably arranged inside the sheath tube element 101; the opening element 102 is arranged at the distal end or side of the sheath tube element 101 for the distal end of the guiding tube unit 200 to pass through.

[0088] The sheath tube element 101 has a hollow structure.

[0089] In some of these embodiments, the distal end of the sheath tube element 101 is sharp, and its structure is an end portion with a tapered structure.

[0090] In some of these embodiments, the distal end of the sheath tube element 101 is blunt, and its structure is that the end portion of the sheath tube element 101 is arc-shaped or hemispherical or flat.

[0091] The distal end of the sheath tube element 101 is a closed structure or an open structure. When the distal end of the sheath tube element 101 is a closed structure, the opening element 102 is arranged at the side of the distal end of the sheath tube element 101; when the distal end of the sheath tube element 101 is an open structure, the opening element 102 is arranged at the end of the distal end of the sheath tube element 101.

[0092] In some of these embodiments, the sheath tube element 101 is made of stainless steel material.

[0093] In some of these embodiments, the sheath tube element 101 is a sheath tube.

[0094] The opening element 102 is in communication with the inside of the sheath tube element 101.

[0095] When the opening element 102 is arranged at the side of the distal end of the sheath tube element 101, the communication position between the opening element 102 and the sheath tube element 101 is subjected to an arc transition treatment for guiding the electrode needle unit 300.

[0096] In some of these embodiments, the opening element 102 is a sheath tube opening.

[0097] Furthermore, the sheath tube unit 100 further includes an identification element. Among them, the identification element is arranged on the outer edge surface of the sheath tube element 101 for indicating the current position.

[0098] In some of these embodiments, there are a plurality of identification elements. The plurality of identification elements are arranged at intervals along the axial direction of the sheath element 101.

[0099] In some of these embodiments, the identification elements include, but are not limited to, scale lines, identification lines, identification points, etc.

[0100] As Figure 4 shown, the guiding tube unit 200 includes a guiding tube element 201. Among them, the distal end of the guiding tube element 201 is a flexible structure. The guiding tube element 201 is movably arranged inside the sheath unit 100. An electrode needle unit 300 is movably arranged inside the guiding tube element 201 for reciprocating movement along the axial direction of the sheath unit 100 so that the distal end of the guiding tube element 201 is exposed through the opening element 102 of the sheath unit 100.

[0101] Specifically, the guiding tube element 201 is movably arranged inside the sheath element 101.

[0102] The guiding tube element 201 is a hollow structure.

[0103] In some of these embodiments, the distal end of the guiding tube element 201 is straight tube-shaped, bent tube-shaped, or arc-shaped semi-bent tube-shaped.

[0104] The size of the guiding tube element 201 matches the size of the sheath element 101. Generally, the radial dimension of the outer edge surface of the guiding tube element 201 is not greater than the radial dimension of the inner edge surface of the sheath element 101.

[0105] In some of these embodiments, the guiding tube element 201 is made of a shape memory alloy material.

[0106] In some of these embodiments, the guiding tube element 201 is a guiding tube.

[0107] As Figure 5 shown, the electrode needle unit 300 includes an electrode needle element 301, a plurality of groove elements 302, and a plurality of electrode plate elements 303. Among them, the electrode needle element 301 is a flexible structure. The electrode needle element 301 is movably arranged inside the guiding tube unit 200 for reciprocating movement along the axial direction of the guiding tube unit 200; the plurality of groove elements 302 are distributed at the distal end of the electrode needle element 301, and the groove elements 302 are annular; the plurality of electrode plate elements 303 are respectively arranged in the corresponding groove elements 302, and the electrode plate elements 303 are annular.

[0108] Specifically, the electrode needle element 301 is movably arranged inside the guiding tube element 201 for reciprocating movement along the axial direction of the guiding tube element 201.

[0109] Among them, the distal end of the electrode needle element 301 is far from the distal end of the guiding tube element 201 and reaches the radiofrequency ablation position through the opening element 102.

[0110] In some of these embodiments, the distal end of the electrode needle element 301 is in the shape of a straight needle or a bent needle.

[0111] The size of the electrode needle element 301 matches the size of the guiding tube element 201. Generally, the radial dimension of the outer edge surface of the electrode needle element 301 is not greater than the radial dimension of the inner edge surface of the guiding tube element 201.

[0112] In some of these embodiments, the electrode needle element 301 includes an outer needle member, an inner needle member, and at least one electrical connection member. Among them, the outer needle member is movably arranged inside the guiding tube element 201, and a plurality of groove elements 302 are distributed at the distal end of the outer needle member; the inner needle member is arranged inside the outer needle member; the electrical connection member is arranged between the outer needle member and the inner needle member and is electrically connected to the corresponding electrode plate element 303 respectively.

[0113] In some of these embodiments, the outer needle member is made of a polymer material, including but not limited to pebax and PTEF materials.

[0114] Generally, the distal end of the inner needle member is sharp.

[0115] In some of these embodiments, the inner needle member is made of a shape memory alloy material.

[0116] In some of these embodiments, the electrical connection member includes but is not limited to a wire.

[0117] A plurality of groove elements 302 are arranged at intervals along the axial direction of the electrode needle element 301 (outer needle member) at the distal end of the electrode needle element 301.

[0118] A plurality of groove elements 302 communicate with the inside of the electrode needle element 301 (outer needle member) respectively.

[0119] The size of the groove element 302 matches the size of the electrode needle element 301. Generally, the depth of the groove element 302 is less than the wall thickness of the outer needle member.

[0120] In some of these embodiments, the groove element 302 includes but is not limited to a placement groove.

[0121] The connection method between the electrode plate element 303 and the groove element 302 includes but is not limited to bonding, clamping, etc.

[0122] The number of the electrode plate elements 303 matches the number of the groove elements 302. Generally, the number of the electrode plate elements 303 is equal to the number of the groove elements 302.

[0123] In some of these embodiments, the electrode sheet element 303 includes, but is not limited to, an electrode sheet.

[0124] As shown in FIG. 6, the usage method of the present invention is as follows:

[0125] Penetrate the sheath element 101 through the cortical bone and drive it into the cancellous bone. At this time, the distal end of the guiding tube element 201 is located inside the distal end of the sheath element 101, and the distal end of the electrode needle element 301 is flush with the distal end of the guiding tube element 201;

[0126] Apply a force to the guiding tube element 201 to move the distal end of the guiding tube element 201 away from the sheath element 101 and expose it through the opening element 102;

[0127] Apply a force to the electrode needle element 301 to move the distal end of the electrode needle element 301 away from the guiding tube element 201 and reach the radiofrequency ablation position through the opening element 102. During this process, the distal end of the electrode needle element 301 (i.e., the distal end of the inner needle member) can puncture and enter the bone;

[0128] Start the power supply, and several electrode sheet elements 303 form an electric field to heat and ablate the nerve, thereby completing the radiofrequency ablation operation. Among them, the electric field heating temperature is not higher than 85 °C; since the surrounding of the radiofrequency ablation position is cancellous bone and the heating temperature is not higher than 85 °C, it will not cause excessive damage to the surrounding tissues;

[0129] After the radiofrequency ablation operation is completed, apply a force to the electrode needle element 301 to move the distal end of the electrode needle element 301 closer to the guiding tube element 201 until the distal end of the electrode needle element 301 is flush with the distal end of the guiding tube element 201; apply a force to the guiding tube element 201 to move the distal end of the guiding tube element 201 closer to the sheath element 101 and enter the inside of the sheath element 101 through the opening element 102;

[0130] Finally, remove the sheath element 101.

[0131] The technical effects of the present invention are as follows: The sheath unit can easily break through the cortical bone, facilitating the electrode needle unit to reach the radiofrequency ablation position; the sheath unit has a marking function, facilitating precise positioning; the sheath unit, the guiding tube unit, and the electrode needle unit are integrally arranged, with simple and convenient operation, reducing the operation steps and improving the operation efficiency.

[0132] Embodiment 2

[0133] This embodiment is a variant embodiment of Embodiment 1.

[0134] As Figure 7As shown, the radiofrequency ablation device further includes a first screw drive unit 400 and a second screw drive unit 500. Among them, the first screw drive unit 400 is connected to the proximal end of the guide tube unit 200 and is used to drive the guide tube unit 200 to reciprocate axially along the sheath tube unit 100; the second screw drive unit 500 is connected to the proximal end of the electrode needle unit 300 and is used to drive the electrode needle unit 300 to reciprocate axially along the guide tube unit 200.

[0135] As Figure 8 shown, the guide tube unit 200 further includes a first threaded element 202. Among them, the first threaded element 202 is arranged at the proximal end of the guide tube unit 200 and is in screw connection with the first screw drive unit 400, and is used to drive the guide tube unit 200 to reciprocate axially along the sheath tube unit 100 under the action of the first screw drive unit 400.

[0136] Specifically, the first threaded element 202 is arranged at the proximal end of the guide tube element 201 and is used to drive the guide tube element 201 to reciprocate axially along the sheath tube element 101.

[0137] The size of the first threaded element 202 matches the size of the guide tube element 201. Generally, the axial dimension of the first threaded element 202 is smaller than the axial dimension of the guide tube element 201.

[0138] In some of these embodiments, the first threaded element 202 includes, but is not limited to, an external thread.

[0139] As Figure 9 shown, the electrode needle unit 300 further includes a second threaded element 304. Among them, the second threaded element 304 is arranged at the proximal end of the electrode needle unit 300 and is in screw connection with the second screw drive unit 500, and is used to drive the electrode needle unit 300 to reciprocate axially along the guide tube unit 200 under the action of the second screw drive unit 500.

[0140] Specifically, the second threaded element 304 is arranged at the proximal end of the electrode needle element 301 (outer needle piece) and is used to drive the electrode needle element 301 to reciprocate axially along the guide tube element 201.

[0141] The size of the second threaded element 304 matches the size of the electrode needle element 301. Generally, the axial dimension of the second threaded element 304 is smaller than the axial dimension of the electrode needle element 301.

[0142] In some of these embodiments, the second threaded element 304 includes, but is not limited to, an external thread and an internal thread.

[0143] As Figure 10As shown, the first screw driving unit 400 includes a first control element 401 and a third threaded element 402. The first control element 401 is movably arranged at the proximal end of the guiding tube unit 200; the third threaded element 402 is arranged at the distal end of the first control element 401 and is helically connected to the proximal end of the guiding tube unit 200, and is used to drive the guiding tube element to reciprocate axially along the sheath tube unit 100 under the action of the first control element 401.

[0144] Specifically, the first control element 401 is movably arranged at the proximal end of the guiding tube element 201; the third threaded element 402 is helically connected to the first threaded element 202, and is used to drive the guiding tube element 201 to reciprocate axially along the sheath tube element 101 through the first threaded element 202.

[0145] The working principle of the first screw driving unit 400 is to convert rotational motion into linear motion, so that the guiding tube element 201 can perform linear reciprocating motion.

[0146] In some embodiments, the first control element 401 includes a first control member, a first rotating member, a second rotating member and a third rotating member. Among them, the first control member is rotatably arranged at the proximal end of the guiding tube element 201; the first rotating member is arranged at the distal end of the first control member and is connected to the first control member for rotating under the action of the first control member; the second rotating member is arranged at the distal end of the first rotating member, and the third threaded element 402 is arranged at the distal end of the second rotating member and is connected to the first rotating member for driving the third threaded element 402 to rotate under the action of the first rotating member; the third rotating member penetrates through the first control member, the first rotating member and the second rotating member and is rotatably connected to the second screw driving unit 500.

[0147] In some embodiments, the first control member includes but is not limited to a control knob.

[0148] The size of the first rotating member matches the size of the first control member. Generally, the radial dimension of the first rotating member is smaller than the radial dimension of the first control member.

[0149] In some embodiments, the first rotating member includes but is not limited to a rotating shaft.

[0150] The size of the second rotating member matches the size of the first rotating member. Generally, the radial dimension of the second rotating member is larger than the radial dimension of the first rotating member.

[0151] In some embodiments, the second rotating member includes but is not limited to a rotating shaft and a rotating cylinder.

[0152] In some embodiments, the third rotating member includes but is not limited to a rotating groove.

[0153] The size of the third threaded element 402 matches the size of the first control element 401. Generally, the axial dimension of the third threaded element 402 is smaller than the axial dimension of the second rotating member.

[0154] In some of these embodiments, the third threaded element 402 includes, but is not limited to, an internal thread, an external thread. Generally, the first threaded element 202 is one of an external thread and an internal thread, and the third threaded element 402 is the other of the external thread and the internal thread.

[0155] Furthermore, the first screw drive unit 400 further includes a holding element 403. Wherein, the holding element 403 is arranged at the proximal end of the sheath tube unit 100, the distal end of the holding element 403 is connected to the proximal end of the sheath tube unit 100, and the distal end of the holding element 403 is rotatably connected to the first control element 401.

[0156] Specifically, the holding element 403 is arranged at the proximal end of the sheath tube element 101, and the distal end of the holding element 403 is connected to the proximal end of the sheath tube element 101.

[0157] The purpose of arranging the holding element 403 is to keep the sheath tube element 101 and the first control element 401 relatively stationary. That is, the first control element 401 only rotates and does not move forward or backward; the sheath tube element 101 does not perform any movement.

[0158] The connection manner between the holding element 403 and the sheath tube element 101 includes, but is not limited to, plugging, bonding, etc.

[0159] In some of these embodiments, the holding element 403 includes a holding part, a first through groove part, a second through groove part, and a third through groove part. Wherein, the holding part is arranged at the proximal end of the sheath tube element 101, and the first control part of the first control element 401 is arranged outside the distal end of the holding part; the first through groove part is arranged at the proximal end of the holding part and is rotatably connected to the first rotating part of the first control element 401; the second through groove part is arranged inside the holding part and is communicated with the first through groove part and is rotatably connected to the second rotating part of the first control element 401; the third through groove part is arranged at the distal end of the holding part and is communicated with the second through groove part and is rotatably and slidably connected to the proximal end of the guide tube element 201 or connected to the proximal end of the sheath tube element 101.

[0160] The size of the first through groove part matches the size of the first rotating part. Generally, the radial dimension of the first through groove part is equal to the radial dimension of the first rotating part, and the radial dimension of the first through groove part is not greater than the radial dimension of the first rotating part.

[0161] The size of the second through groove part matches the size of the second rotating part. Generally, the radial dimension of the second through groove part is equal to the radial dimension of the second rotating part, and the axial dimension of the second through groove part is equal to the axial dimension of the second rotating part.

[0162] The size of the second through-groove member matches the size of the first through-groove member. Generally, the radial dimension of the second through-groove member is greater than the radial dimension of the first through-groove member.

[0163] The size of the third through-groove member matches the size of the sheath tube element 101. Generally, the radial dimension of the third through-groove member is equal to the radial dimension of the outer edge surface of the sheath tube element 101.

[0164] The size of the third through-groove member matches the size of the guide tube element 201. Generally, the radial dimension of the third through-groove member is not less than the radial dimension of the outer edge surface of the outer needle member.

[0165] The size of the third through-groove member matches the size of the second through-groove member. Generally, the radial dimension of the third through-groove member is less than the radial dimension of the second through-groove member.

[0166] As Figure 11 shown, the second screw drive unit 500 includes a second control element 501 and a fourth threaded element 502. Among them, the second control element 501 is movably arranged at the proximal end of the electrode needle unit 300; the fourth threaded element 502 is arranged at the distal end of the second control element 501 and is helically connected to the proximal end of the electrode needle unit 300, and is used to drive the electrode needle unit 300 to reciprocate axially along the guide tube unit 200 under the action of the second control element 501.

[0167] Specifically, the second control element 501 is movably arranged at the proximal end of the electrode needle element 301 and is rotatably connected to the first control element 401; the fourth threaded element 502 is helically connected to the second threaded element 304, and is used to drive the electrode needle element 301 to reciprocate axially along the guide tube element 201 through the second threaded element 304.

[0168] The working principle of the second screw drive unit 500 is to convert rotational motion into linear motion, so that the electrode needle element 301 can perform linear reciprocating motion.

[0169] In some of these embodiments, the second control element 501 and the first control element 401 are coaxially arranged and sleeved.

[0170] In some of these embodiments, the second control element 501 includes a second control member, a fourth rotating member, and a fifth rotating member. Among them, the second control member is rotatably arranged at the proximal end of the electrode needle element 301; the fourth rotating member is arranged at the distal end of the second control member and is connected to the second control member, and is used to rotate under the action of the second control member; the fifth rotating member is arranged at the distal end of the fourth rotating member, the distal end of the fifth rotating member is provided with a fourth threaded element 502, and is connected to the fourth rotating member and is rotatably connected to the first control element 401 (the third rotating member), and is used to drive the fourth threaded element 502 to rotate under the action of the fourth rotating member.

[0171] In some of these embodiments, the second operating member includes, but is not limited to, an operating knob.

[0172] The size of the fourth rotating member matches the size of the second operating member. Generally, the radial dimension of the fourth rotating member is smaller than the radial dimension of the second operating member.

[0173] In some of these embodiments, the fourth rotating member includes, but is not limited to, a rotating shaft.

[0174] The size of the fifth rotating member matches the size of the fourth rotating member. Generally, the radial dimension of the fifth rotating member is larger than the radial dimension of the fourth rotating member.

[0175] In some of these embodiments, the fifth rotating member includes, but is not limited to, a rotating shaft and a rotating cylinder.

[0176] The size of the fourth threaded element 502 matches the size of the second operating element 501. Generally, the axial dimension of the fourth threaded element 502 is smaller than the axial dimension of the fifth rotating member.

[0177] In some of these embodiments, the fourth threaded element 502 includes, but is not limited to, an external thread and an internal thread. Generally, the second threaded element 304 is one of an external thread and an internal thread, and the fourth threaded element 502 is the other of an external thread and an internal thread.

[0178] The usage method of this embodiment is as follows:

[0179] Penetrate the sheath element 101 through the cortical bone and drive it into the cancellous bone. At this time, the distal end of the guiding tube element 201 is located inside the distal end of the sheath element 101, and the distal end of the electrode needle element 301 is flush with the distal end of the guiding tube element 201;

[0180] Rotate the first operating element 401 in the first direction (such as the clockwise direction). Under the cooperation of the third threaded element 402 and the first threaded element 202, the distal end of the guiding tube element 201 moves away from the sheath element 101 and is exposed through the opening element 102;

[0181] Rotate the second operating element 501 in the first direction (such as the clockwise direction). Under the cooperation of the fourth threaded element 502 and the second threaded element 304, the distal end of the electrode needle element 301 moves away from the guiding tube element 201 and reaches the radiofrequency ablation position through the opening element 102;

[0182] Start the power supply. A plurality of electrode plate elements 303 form an electric field to heat and ablate the nerve, thereby completing the radiofrequency ablation operation. Among them, the electric field heating temperature is not higher than 85°C; since the surrounding of the radiofrequency ablation position is cancellous bone and the heating temperature is not higher than 85°C, it will not cause excessive damage to the surrounding tissues;

[0183] After the radiofrequency ablation operation is completed, rotate the second control element 501 in the second direction (such as the counterclockwise direction). Under the cooperation of the fourth threaded element 502 and the second threaded element 304, the distal end of the electrode needle element 301 approaches the guiding tube element 201 until the distal end of the electrode needle element 301 is flush with the distal end of the guiding tube element 201; rotate the first control element 401 in the second direction (such as the counterclockwise direction). Under the cooperation of the third threaded element 402 and the first threaded element 202, the distal end of the guiding tube element 201 approaches the sheath tube element 101 and enters the interior of the sheath tube element 101 through the opening element 102;

[0184] Finally, remove the sheath tube element 101.

[0185] The technical effects of the present invention are as follows: By utilizing the spiral cooperation between the first spiral drive unit and the guiding tube unit and the spiral cooperation between the second spiral drive unit and the electrode needle unit, the moving speed and moving position of the guiding tube unit and the electrode needle unit can be accurately controlled, facilitating the precise control of the guiding tube unit and the electrode needle unit.

[0186] Embodiment 3

[0187] This embodiment is a variant embodiment of Embodiment 1.

[0188] As Figure 12 shown, the radiofrequency ablation device further includes an electric drive unit 600. Among them, the linkage unit 700 and the electric drive unit 600 are respectively connected to the guiding tube unit 200 and the electrode needle unit 300, and are used to drive the guiding tube unit 200 to reciprocate axially along the sheath tube unit 100 and the electrode needle unit 300 to reciprocate axially along the guiding tube unit 200.

[0189] As Figure 13 shown, the sheath tube unit 100 further includes at least one first sliding element 103. Among them, the first sliding element 103 is disposed at the proximal end of the sheath tube unit 100 and penetrates through the side portion of the sheath tube unit 100.

[0190] Specifically, the first sliding element 103 is disposed at the proximal end of the sheath tube element 101 and penetrates through the side portion of the sheath tube element 101.

[0191] In some of these embodiments, there are two first sliding elements 103. The two first sliding elements 103 are symmetrically disposed on both sides of the sheath tube element 101.

[0192] In some of these embodiments, the first sliding element 103 includes but is not limited to a sliding slit and a sliding groove.

[0193] As Figure 14As shown, the guide tube unit 200 further includes at least one second sliding element 203, a first link element 204, and a first movable element 205. Among them, the second sliding element 203 is disposed at the proximal end of the guide tube unit 200 and penetrates through the side of the guide tube unit 200; the first link element 204 is disposed at the proximal end of the guide tube unit 200, and the distal end of the first link element 204 is connected to the distal end of the guide tube unit 200 for driving the guide tube unit 200 to reciprocate axially along the sheath tube unit 100; the first movable element 205 is disposed at the proximal end of the first link element 204 and is movably connected to the electric drive unit 600 for driving the first link element 204 to reciprocate axially along the sheath tube unit 100 under the action of the electric drive unit 600.

[0194] Specifically, the second sliding element 203 is disposed at the proximal end of the guide tube element 201 and penetrates through the side of the guide tube element 201; the first link element 204 is disposed at the proximal end of the guide tube element 201 and is slidably connected to the first sliding element 103.

[0195] In some embodiments, the second sliding element 203 includes, but is not limited to, a sliding slit, a sliding groove.

[0196] Generally, the first link element 204 and the second sliding element 203 are disposed on different sides of the guide tube element 201. For example, the first link element 204 and the second sliding element 203 are symmetrically disposed on both sides of the guide tube element 201.

[0197] The connection manner between the first link element 204 and the guide tube element 201 includes, but is not limited to, bonding, clamping, etc.

[0198] In some embodiments, the first link element 204 includes, but is not limited to, a link.

[0199] The connection manner between the first movable element 205 and the first link element 204 includes, but is not limited to, a fixed connection, such as welding, integral molding.

[0200] In some embodiments, the first movable element 205 includes, but is not limited to, a threaded rotating seat.

[0201] Such as Figure 15As shown, the electrode needle unit 300 further includes a second link element 305 and a second movable element 306. Among them, the second link element 305 is arranged at the proximal end of the electrode needle unit 300. The distal end of the second link element 305 is connected to the proximal end of the electrode needle unit 300 and is used to drive the electrode needle unit 300 to reciprocate axially along the guide tube unit 200. The second movable element 306 is arranged at the proximal end of the second link element 305 and is movably connected to the electric drive unit 600, and is used to drive the second link element 305 to reciprocate axially along the guide tube unit 200 under the action of the electric drive unit 600.

[0202] Specifically, the second link element 305 is arranged at the proximal end of the electrode needle element 301 (outer needle member) and is slidably connected to the first sliding element 103 and the second sliding element 203 respectively.

[0203] The connection manners between the second link element 305 of the linkage unit 700 and the electrode needle element 301 include but are not limited to bonding, clamping, etc.

[0204] Generally, the second link element 305 and the first link element 204 are arranged symmetrically basically.

[0205] In some of these embodiments, the second link element 305 includes but is not limited to a connecting rod.

[0206] The connection manners between the second movable element 306 and the second link element 305 include but are not limited to fixed connection, such as welding and integral molding.

[0207] In some of these embodiments, the second movable element 306 includes but is not limited to a threaded rotating seat.

[0208] As Figure 16 As shown, the electric drive unit 600 includes a third control element 601, a third movable element 602, and a fourth movable element 603. Among them, the third control element 601 is arranged at the proximal end of the electrode needle unit 300. The third movable element 602 is arranged at the output end of the third control element 601 and is movably connected to the guide tube unit 200, and is used to drive the guide tube unit 200 to reciprocate axially along the sheath tube unit 100 under the action of the third control element 601. The fourth movable element 603 is arranged at the output end of the third control element 601 and is movably connected to the electrode needle unit 300, and is used to drive the electrode needle unit 300 to reciprocate axially along the guide tube unit 200 under the action of the third control element 601.

[0209] Specifically, the third control element 601 is disposed at the proximal end of the electrode needle element 301; the third movable element 602 is movably connected to the first movable element 205 and is configured to drive the guide tube element 201 to reciprocate axially along the sheath tube element 101 through the first link element 204; the fourth movable element 603 is movably connected to the second movable element 306 and is configured to drive the electrode needle element 301 to reciprocate axially along the guide tube element 201 through the second link element 305.

[0210] The working principle of the electric drive unit 600 is to convert rotational motion into linear motion, enabling the electrode needle element 301 to perform linear reciprocating motion.

[0211] In some of these embodiments, the third control element 601 includes a first drive motor and a second drive motor. Among them, the first drive motor is connected to the third movable element 602 and is configured to drive the third movable element 602 to rotate; the second drive motor is disposed on the side of the first drive motor and is connected to the fourth movable element 603 and is configured to drive the fourth movable element 603 to rotate

[0212] The third movable element 602 is rotationally connected and slidably connected to the first movable element 205.

[0213] In some of these embodiments, the third movable element 602 includes, but is not limited to, a screw.

[0214] The fourth movable element 603 is disposed symmetrically with respect to the third movable element 602.

[0215] The fourth movable element 603 is rotationally connected and slidably connected to the second movable element 306.

[0216] In some of these embodiments, the fourth movable element 603 includes, but is not limited to, a screw.

[0217] Further, the electric drive unit 600 further includes a first rotating element 604. Among them, the first rotating element 604 is disposed at the distal end of the third movable element 602 and is configured to rotate under the action of the third movable element 602.

[0218] The connection manner between the first rotating element 604 and the third movable element 602 includes, but is not limited to, fixed connection, such as welding and integral molding.

[0219] In some of these embodiments, the first rotating element 604 includes, but is not limited to, a rotating column and a rotating shaft.

[0220] Further, the electric drive unit 600 further includes a second rotating element 605. Among them, the second rotating element 605 is disposed at the proximal end of the third movable element 602 and is configured to rotate under the action of the third movable element 602.

[0221] The connection manner between the second rotating element 605 and the third movable element 602 includes but is not limited to fixed connection, such as welding and integral molding.

[0222] In some of these embodiments, the second rotating element 605 includes but is not limited to a rotating column and a rotating shaft.

[0223] Furthermore, the electric drive unit 600 further includes a third rotating element 606. Wherein, the third rotating element 606 is disposed at the distal end of the fourth movable element 603 and is configured to rotate under the action of the fourth movable element 603.

[0224] The connection manner between the third rotating element 606 and the fourth movable element 603 includes but is not limited to fixed connection, such as welding and integral molding.

[0225] In some of these embodiments, the third rotating element 606 includes but is not limited to a rotating column and a rotating shaft.

[0226] Furthermore, the electric drive unit 600 further includes a fourth rotating element 607. Wherein, the fourth rotating element 607 is disposed at the proximal end of the fourth movable element 603 and is configured to rotate under the action of the fourth movable element 603.

[0227] The connection manner between the fourth rotating element 607 and the fourth movable element 603 includes but is not limited to fixed connection, such as welding and integral molding.

[0228] In some of these embodiments, the fourth rotating element 607 includes but is not limited to a rotating column and a rotating shaft.

[0229] Furthermore, the electric drive unit 600 further includes a first limiting element 608. Wherein, the first limiting element 608 is disposed at the proximal end of the third movable element 602 and is configured to limit the position of the third movable element 602.

[0230] Generally, the first limiting element 608 is disposed between the first rotating element 604 and the third movable element 602.

[0231] The size of the first limiting element 608 is matched with the sizes of the third movable element 602 and the first rotating element 604. Generally, the radial size of the first limiting element 608 is greater than the radial sizes of the third movable element 602 and the first rotating element 604.

[0232] The connection manner between the first limiting element 608 and the third movable element 602 includes but is not limited to fixed connection, such as welding and integral molding.

[0233] In some of these embodiments, the first limiting element 608 includes but is not limited to a limiting ring and a limiting plate.

[0234] Furthermore, the electric drive unit 600 further includes a second limiting element 609. Wherein, the second limiting element 609 is disposed at the distal end of the third movable element 602 for limiting the position of the third movable element 602.

[0235] Generally, the second limiting element 609 is disposed between the second rotating element 605 and the third movable element 602.

[0236] The size of the second limiting element 609 matches the sizes of the third movable element 602 and the second rotating element 605. Generally, the radial dimension of the second limiting element 609 is greater than the radial dimensions of the third movable element 602 and the second rotating element 605.

[0237] The connection manner between the second limiting element 609 and the third movable element 602 includes but is not limited to fixed connection, such as welding and integral molding.

[0238] In some of the embodiments, the second limiting element 609 includes but is not limited to a limiting ring and a limiting plate.

[0239] Furthermore, the electric drive unit 600 further includes a third limiting element 610. Wherein, the third limiting element 610 is disposed at the proximal end of the fourth movable element 603 for limiting the position of the fourth movable element 603.

[0240] Generally, the third limiting element 610 is disposed between the third rotating element 606 and the fourth movable element 603.

[0241] The size of the third limiting element 610 matches the sizes of the fourth movable element 603 and the third rotating element 606. Generally, the radial dimension of the third limiting element 610 is greater than the radial dimensions of the fourth movable element 603 and the third rotating element 606.

[0242] The connection manner between the third limiting element 610 and the fourth movable element 603 includes but is not limited to fixed connection, such as welding and integral molding.

[0243] In some of the embodiments, the third limiting element 610 includes but is not limited to a limiting ring and a limiting plate.

[0244] Furthermore, the electric drive unit 600 further includes a fourth limiting element 611. Wherein, the fourth limiting element 611 is disposed at the distal end of the fourth movable element 603 for limiting the position of the fourth movable element 603.

[0245] Generally, the fourth limiting element 611 is disposed between the fourth rotating element 607 and the fourth movable element 603.

[0246] The size of the fourth limiting element 611 matches the sizes of the fourth movable element 603 and the fourth rotating element 607. Generally, the radial size of the fourth limiting element 611 is larger than the radial sizes of the fourth movable element 603 and the fourth rotating element 607.

[0247] The connection mode between the fourth limiting element 611 and the fourth movable element 603 includes but is not limited to fixed connection, such as welding and integral molding.

[0248] In some of these embodiments, the fourth limiting element 611 includes but is not limited to a limiting ring and a limiting plate.

[0249] The usage method of this embodiment is as follows:

[0250] Penetrate the sheath element 101 through the cortical bone and drive it into the cancellous bone. At this time, the distal end of the guiding tube element 201 is located inside the distal end of the sheath element 101, and the distal end of the electrode needle element 301 is flush with the distal end of the guiding tube element 201;

[0251] Start the third control element 601, so that the third control element 601 drives the third movable element 602 and the fourth movable element 603 to rotate in the first direction (such as the clockwise direction). With the cooperation between the third movable element 602 and the first movable element 205, and the fourth movable element 603 and the second movable element 306, the first connecting rod element 204 and the second connecting rod element 305 respectively drive the guiding tube element 201 and the electrode needle element 301 to move towards the distal end of the sheath element 101;

[0252] When the distal end of the guiding tube element 201 is exposed through the opening element 102, stop the third control element 601;

[0253] Start the third control element 601, so that the third control element 601 drives the fourth movable element 603 to rotate in the first direction (such as the clockwise direction). With the cooperation between the fourth movable element 603 and the second movable element 306, the second connecting rod element 305 drives the distal end of the electrode needle element 301 to move away from the distal end of the guiding tube element 201 and reach the radiofrequency ablation position, and then stop the third control element 601;

[0254] Start the power supply, and several electrode plate elements 303 form an electric field to heat and ablate the nerve, thereby completing the radiofrequency ablation operation. Among them, the electric field heating temperature is not higher than 85°C; since the surrounding of the radiofrequency ablation position is cancellous bone and the heating temperature is not higher than 85°C, it will not cause excessive damage to the surrounding tissues;

[0255] After the radiofrequency ablation operation is completed, activate the third control element 601, so that the third control element 601 drives the third movable element 602 and the fourth movable element 603 to rotate in the second direction (such as the counterclockwise direction). Under the cooperation of the fourth movable element 603 and the second movable element 306, the second link element 305 drives the distal end of the electrode needle element 301 to approach the guide tube element 201 until the distal end of the electrode needle element 301 is flush with the distal end of the guide tube element 201, and then stop the third control element 601;

[0256] Activate the third control element 601, so that the third control element 601 drives the third movable element 602 and the fourth movable element 603 to rotate in the second direction (such as the counterclockwise direction). Under the cooperation of the third movable element 602 and the first movable element 205, and the fourth movable element 603 and the second movable element 306, the first link element 204 and the second link element 305 respectively drive the distal ends of the guide tube element 201 and the electrode needle element 301 to approach the sheath tube element 101, and enter the interior of the sheath tube element 101 through the opening element 102, and then stop the third control element 601;

[0257] Finally, remove the sheath tube element 101.

[0258] The technical effects of the present invention are as follows: By using the electric cooperation between the electric drive unit and the guide tube unit and the electrode needle unit respectively, the moving positions of the guide tube unit and the electrode needle unit can be accurately controlled, which is convenient for accurately controlling the guide tube unit and the electrode needle unit.

[0259] Embodiment 4

[0260] As Figure 17 shown, the radiofrequency ablation device further includes a linkage unit 700 and a link drive unit 800. Among them, the linkage unit 700 is detachably connected to the guide tube unit 200 and is connected to the electrode needle unit 300, and is used to make the guide tube unit 200 and the electrode needle unit 300 move simultaneously when connected to the guide tube unit 200 or make the electrode needle unit 300 move independently when separated from the guide tube unit 200; the link drive unit 800 is connected to the proximal end of the electrode needle unit 300 and is used to drive the electrode needle unit 300 to reciprocate axially along the guide tube unit 200.

[0261] As Figure 12 shown, the sheath tube unit 100 further includes at least one first sliding element 103. Among them, the first sliding element 103 is arranged at the proximal end of the sheath tube unit 100 and penetrates through the side part of the sheath tube unit 100.

[0262] Specifically, the first sliding element 103 is arranged at the proximal end of the sheath tube element 101 and penetrates through the side part of the sheath tube element 101.

[0263] In some of these embodiments, there are two first sliding elements 103. The two first sliding elements 103 are symmetrically arranged on both sides of the sheath element 101.

[0264] In some of these embodiments, the first sliding element 103 includes, but is not limited to, a sliding slit and a sliding groove.

[0265] As Figure 18 shown, the guiding tube unit 200 further includes at least one second sliding element 203. Among them, the second sliding element 203 is arranged at the proximal end of the guiding tube unit 200 and penetrates through the side part of the guiding tube unit 200.

[0266] Specifically, the second sliding element 203 is arranged at the proximal end of the guiding tube element 201 and penetrates through the side part of the guiding tube element 201.

[0267] In some of these embodiments, there are two second sliding elements 203. The two second sliding elements 203 are symmetrically arranged on both sides of the guiding tube element 201.

[0268] In some of these embodiments, the second sliding element 203 includes, but is not limited to, a sliding slit and a sliding groove.

[0269] Furthermore, the guiding tube unit 200 further includes a first linkage element 206. The first linkage element 206 is arranged at the proximal end of the guiding tube unit 200 and is detachably connected to the linkage unit 700, and is used for driving the guiding tube unit 200 to reciprocate axially along the sheath unit 100 when connected to the linkage unit 700.

[0270] Specifically, the first linkage element 206 is arranged at the proximal end of the guiding tube element 201 and is slidably connected to the first sliding element 103.

[0271] The first linkage element 206 and the guiding tube element 201 can be fixedly connected or detachably connected. For example, integrally formed.

[0272] In some of these embodiments, the first linkage element 206 includes a first sliding member, a first support member, and a first linkage member. Among them, the first sliding member is arranged at the proximal end of the guiding tube element 201 and is slidably connected to the first sliding element 103; the first support member is arranged at the proximal end of the guiding tube element 201, and the distal end of the first support member is connected to the first sliding member; the first linkage member is arranged at the top end of the first support member and is detachably connected to the linkage unit 700.

[0273] The size of the first sliding member matches the size of the guiding tube element 201. Generally, the height of the first sliding member is less than the radial dimension of the guiding tube element 201.

[0274] The size of the first sliding member matches the size of the first sliding element 103. Generally, the height of the first sliding member is equal to the height of the first sliding element 103, the length of the first sliding member is greater than the width of the first sliding element 103, and the width of the first sliding member is less than the length of the first sliding element 103.

[0275] In some of these embodiments, the first sliding member includes, but is not limited to, a slider.

[0276] The size of the first support member matches the size of the first sliding member. Generally, the height of the first support member is not less than the height of the first sliding member, and the length of the first support member is greater than the width of the first sliding member.

[0277] In some of these embodiments, the first support member includes, but is not limited to, a support rod.

[0278] The size of the first linkage member matches the size of the first support member. Generally, the radial dimensions (such as length and width) of the first linkage member are not greater than the length and width of the first support member.

[0279] In some of these embodiments, the first linkage member includes, but is not limited to, a linkage block.

[0280] As Figure 19 shown, the electrode needle unit 300 further includes a second linkage element 307, a third link element 308, and a fifth movable element 309. Among them, the second linkage element 307 is disposed at the proximal end of the electrode needle unit 300 and is connected to the linkage unit 700 for driving the linkage unit 700 to reciprocate; the third link element 308 is disposed at the proximal end of the electrode needle unit 300, and the distal end of the third link element 308 is connected to the proximal end of the electrode needle unit 300 for driving the electrode needle unit 300 to reciprocate axially along the guide tube unit 200; the fifth movable element 309 is disposed at the proximal end of the third link element 308 and is movably connected to the link driving unit 800 for driving the third link element 308 to reciprocate axially along the guide tube unit 200 under the action of the link driving unit 800.

[0281] Specifically, the second linkage element 307 is disposed at the proximal end of the electrode needle element 301 (outer needle member) and is slidably connected to the first sliding element 103 and the second sliding element 203 respectively; the third link element 308 is disposed at the proximal end of the electrode needle element 301 (outer needle member) and is connected to the second linkage element 307.

[0282] The second linkage element 307 and the electrode needle element 301 can be fixedly connected or detachably connected. For example, integrally formed.

[0283] In some of these embodiments, the second linkage element 307 includes a second slider, a second support member, and a second linkage member. Among them, the second slider is disposed at the proximal end of the electrode needle element 301 and is slidably connected to the first slider element 103 and the second slider element 203; the second support member is disposed at the proximal end of the electrode needle element 301, the distal end of the second support member is connected to the second slider, and the proximal end of the second support member is connected to the distal end of the third link element 308; the second linkage member is disposed at the top of the second support member and is detachably connected to the linkage unit 700.

[0284] The size of the second slider matches the size of the electrode needle element 301. Generally, the height of the second slider is less than the radial dimension of the electrode needle element 301.

[0285] The size of the second slider matches the size of the first slider element 103 (second slider element 203). Generally, the height of the second slider is equal to the height of the first slider element 103 (second slider element 203), the length of the second slider is greater than the width of the first slider element 103 (second slider element 203), and the width of the second slider is less than the length of the first slider element 103 (second slider element 203).

[0286] In some of these embodiments, the second slider includes, but is not limited to, a slider.

[0287] The size of the second support member matches the size of the second slider. Generally, the height of the second support member is not less than the height of the second slider, and the length of the second support member is greater than the width of the second slider.

[0288] In some of these embodiments, the second support member includes, but is not limited to, a support rod.

[0289] The size of the second linkage member matches the size of the second support member. Generally, the radial dimensions (such as length and width) of the second linkage member are not greater than the length and width of the second support member.

[0290] In some of these embodiments, the second linkage member includes, but is not limited to, a linkage block.

[0291] The connection manner between the third link element 308 and the second linkage element 307 includes, but is not limited to, bonding, clamping, etc.

[0292] In some of these embodiments, the third link element 308 includes, but is not limited to, a link.

[0293] The connection manner between the fifth movable element 309 and the third link element 308 includes, but is not limited to, fixed connection, such as welding and integral molding.

[0294] In some of these embodiments, the fifth movable element 309 includes, but is not limited to, a rotating shaft.

[0295] As Figure 20 shown, the linkage unit 700 includes a third linkage element 701, a fourth linkage element 702, and a fifth linkage element 703. Among them, the third linkage element 701 is movably disposed on the side of the guide tube unit 200 and the side of the electrode needle unit 300; the fourth linkage element 702 is disposed on the side of the third linkage element 701, and is detachably connected to the guide tube unit 200 and connected to the electrode needle unit 300, and is used to drive the third linkage element 701 to reciprocate under the action of the electrode needle unit 300; the fifth linkage element 703 is disposed on the side of the third linkage element 701 and communicates with the fourth linkage element 702, and is used to allow the guide tube unit 200 to enter or leave the fourth linkage element 702.

[0296] Specifically, the third linkage element 701 is movably disposed on the upper side of the guide tube element 201 and the upper side of the electrode needle element 301; the fourth linkage element 702 is detachably connected to the first linkage element 206 and connected to the second linkage element 307, and is used to drive the third linkage element 701 to reciprocate under the action of the second linkage element 307; the fifth linkage element 703 is used to allow the first linkage element 206 to enter or leave the fourth linkage element 702.

[0297] Generally, the moving direction of the third linkage element 701 is perpendicular to the moving directions of the guide tube element 201 and the electrode needle element 301. That is, the third linkage element 701 can reciprocate along the X-axis direction to connect or separate the fourth linkage element 702 and the first linkage element 206, and further, when the fourth linkage element 702 is connected to the first linkage element 206, the guide tube element 201 and the electrode needle element 301 move together along the Y-axis direction, and when the fourth linkage element 702 is separated from the first linkage element 206, the electrode needle element 301 moves alone along the Y-axis direction.

[0298] In the present invention, the linkage unit 700 can be used to move the guide tube unit 200 and the electrode needle unit 300 together, or to keep the guide tube unit 200 stationary and the electrode needle unit 300 move alone.

[0299] In some of these embodiments, the third linkage element 701 includes a linkage block, a first pusher, and a second pusher. Among them, the linkage block is movably disposed on the upper side of the guide tube element 201 and the upper side of the electrode needle element 301, and the bottom end of the linkage block is provided with the fourth linkage element 702 and the fifth linkage element 703; the first pusher is disposed on the first side of the linkage block and is used to push the linkage block to move; the second pusher is disposed on the second side of the linkage block and is used to push the linkage block to move.

[0300] The fourth linkage element 702 is disposed through the bottom of the third linkage element 701.

[0301] The size of the fourth linkage element 702 matches the size of the third linkage element 701. Generally, the length of the fourth linkage element 702 is not greater than the length of the third linkage element 701, the height of the fourth linkage element 702 is less than the height of the third linkage element 701, and the width of the fourth linkage element 702 is less than the width of the third linkage element 701.

[0302] In some of these embodiments, the fourth linkage element 702 includes, but is not limited to, a linkage groove.

[0303] The fifth linkage element 703 is disposed through the bottom and the proximal end of the third linkage element 701.

[0304] The fifth linkage element 703 and the fourth linkage element 702 form an "L" shaped structure.

[0305] The size of the fifth linkage element 703 matches the size of the third linkage element 701. Generally, the length of the fifth linkage element 703 is less than the length of the third linkage element 701, the height of the fifth linkage element 703 is less than the height of the third linkage element 701, and the width of the fifth linkage element 703 is less than the width of the third linkage element 701.

[0306] The size of the fifth linkage element 703 matches the size of the fourth linkage element 702. Generally, the length of the fifth linkage element 703 is less than the length of the fourth linkage element 702, the height of the fifth linkage element 703 is equal to the height of the fourth linkage element 702, and the width of the fifth linkage element 703 is greater than the width of the fourth linkage element 702.

[0307] In some of these embodiments, the fifth linkage element 703 includes, but is not limited to, a linkage groove.

[0308] As Figure 21 shown, the link driving unit 800 includes a fourth control element 801 and a sixth movable element 802. Among them, the fourth control element 801 is movably disposed at the proximal end of the electrode needle unit 300; the sixth movable element 802 is disposed at the end of the fourth control element 801 and is movably connected to the electrode needle unit 300, and is used to drive the electrode needle unit 300 to reciprocate axially along the guide tube unit 200 under the action of the fourth control element 801.

[0309] Specifically, the fourth control element 801 is movably disposed at the proximal end of the electrode needle element 301; the sixth movable element 802 is movably connected to the fifth movable element 309, and is used to drive the electrode needle element 301 to reciprocate axially along the guide tube element 201 through the third link element 308.

[0310] The working principle of the link drive unit 800 is to convert rotational motion into linear motion, enabling the electrode needle element 301 to perform linear reciprocating motion.

[0311] The fourth control element 801 is rotatably disposed at the proximal end of the electrode needle element 301.

[0312] In some of these embodiments, the fourth control element 801 includes, but is not limited to, a control trigger.

[0313] The sixth movable element 802 is rotatably and slidably connected to the fifth movable element 309.

[0314] The size of the sixth movable element 802 can be used to limit the movement range of the fifth movable element 309.

[0315] In some of these embodiments, the sixth movable element 802 includes, but is not limited to, a movable groove.

[0316] Furthermore, the link drive unit 800 further includes a fifth rotating element 803. Among them, the fifth rotating element 803 is connected to the third control element 601 and is used to rotate the third control element 601.

[0317] The fifth rotating element 803 is disposed in the middle of the fourth control element 801. For example, the fifth rotating element 803 is disposed close to the sixth movable element 802.

[0318] By using the fifth rotating element 803, the fourth control element 801 can be rotated about the axis of the fifth rotating element 803, thereby defining the rotation center of the fourth control element 801.

[0319] The fifth rotating element 803 and the fourth control element 801 can be detachably connected or fixedly connected. For example, plugging, integrally formed, etc.

[0320] In some of these embodiments, the fifth rotating element 803 includes, but is not limited to, a rotating shaft.

[0321] The usage method of this embodiment is as follows:

[0322] Penetrate the sheath element 101 through the cortical bone and drive it into the cancellous bone. At this time, the distal end of the guide tube element 201 is located inside the distal end of the sheath element 101, and the distal end of the electrode needle element 301 is flush with the distal end of the guide tube element 201;

[0323] Operate the third linkage element 701 to enable the first linkage element 206 to enter the fourth linkage element 702 through the fifth linkage element 703;

[0324] Rotate the fourth control element 801 in the first direction (e.g., clockwise). With the cooperation of the sixth movable element 802 and the fifth movable element 309, the third link element 308 drives the electrode needle element 301 and the guide tube element 201 to move towards the distal end of the sheath element 101.

[0325] When the distal end of the guide tube element 201 is exposed through the opening element 102, stop the fourth control element 801 and operate the third linkage element 701 to separate the first linkage element 206 from the fourth linkage element 702.

[0326] Rotate the fourth control element 801 in the first direction (e.g., clockwise). With the cooperation of the sixth movable element 802 and the fifth movable element 309, the third link element 308 drives the distal end of the electrode needle element 301 away from the distal end of the guide tube element 201 and reaches the radiofrequency ablation position, then stop the fourth control element 801.

[0327] Start the power supply. A plurality of electrode plate elements 303 form an electric field to heat and ablate the nerve, thus completing the radiofrequency ablation operation. Among them, the electric field heating temperature is not higher than 85°C; since the surrounding of the radiofrequency ablation position is all cancellous bone and the heating temperature is not higher than 85°C, it will not cause excessive damage to the surrounding tissues.

[0328] After the radiofrequency ablation operation is completed, rotate the fourth control element 801 in the second direction (e.g., counterclockwise). With the cooperation of the sixth movable element 802 and the fifth movable element 309, the third link element 308 drives the distal end of the electrode needle element 301 to approach the guide tube element 201 until the distal end of the electrode needle element 301 is flush with the distal end of the guide tube element 201, then stop the fourth control element 801.

[0329] Operate the third linkage element 701 to enable the first linkage element 206 to enter the fourth linkage element 702 through the fifth linkage element 703.

[0330] Rotate the fourth control element 801 in the second direction (e.g., counterclockwise). With the cooperation of the sixth movable element 802 and the fifth movable element 309, the third link element 308 drives the distal ends of the electrode needle element 301 and the guide tube element 201 to approach the sheath element 101 and enter the interior of the sheath element 101 through the opening element 102, then stop the fourth control element 801.

[0331] Finally, remove the sheath element 101.

[0332] The technical effects of the present invention are as follows: By using the linkage cooperation between the linkage unit, the guiding tube unit, and the electrode needle unit, the electrode needle unit can move independently, or the guiding tube unit and the electrode needle unit can move simultaneously, thus achieving precise control; by using the linkage drive cooperation between the connecting rod drive unit and the electrode needle unit, the moving position of the electrode needle unit can be precisely controlled, facilitating the precise control of the electrode needle unit.

[0333] Embodiment 5

[0334] This embodiment is a variant embodiment of Embodiment 1.

[0335] As Figure 22 shown, the radiofrequency ablation device further includes a linkage unit 700 and an engagement drive unit 900. Among them, the linkage unit 700 is detachably connected to the guiding tube unit 200, and is connected to the electrode needle unit 300, and is configured to make the guiding tube unit 200 and the electrode needle unit 300 move simultaneously when connected to the guiding tube unit 200 or make the electrode needle unit 300 move independently when separated from the guiding tube unit 200; the engagement drive unit 900 is connected to the proximal end of the electrode needle unit 300, and is configured to drive the electrode needle unit 300 to reciprocate axially along the guiding tube unit 200.

[0336] As Figure 12 shown, the sheath tube unit 100 further includes at least one first sliding element 103. Among them, the first sliding element 103 is disposed at the proximal end of the sheath tube unit 100 and penetrates through the side portion of the sheath tube unit 100.

[0337] Specifically, the first sliding element 103 is disposed at the proximal end of the sheath tube element 101 and penetrates through the side portion of the sheath tube element 101.

[0338] In some of these embodiments, there are two first sliding elements 103. The two first sliding elements 103 are symmetrically disposed on both sides of the sheath tube element 101.

[0339] In some of these embodiments, the first sliding element 103 includes, but is not limited to, a sliding slit and a sliding groove.

[0340] As Figure 19 shown, the guiding tube unit 200 further includes at least one second sliding element 203. Among them, the second sliding element 203 is disposed at the proximal end of the guiding tube unit 200 and penetrates through the side portion of the guiding tube unit 200.

[0341] Specifically, the second sliding element 203 is disposed at the proximal end of the guiding tube element 201 and penetrates through the side portion of the guiding tube element 201.

[0342] In some of these embodiments, there are two second sliding elements 203. The two second sliding elements 203 are symmetrically arranged on both sides of the guiding tube element 201.

[0343] In some of these embodiments, the second sliding element 203 includes, but is not limited to, a sliding slit and a sliding groove.

[0344] Furthermore, the guiding tube unit 200 further includes a first linkage element 206. The first linkage element 206 is arranged at the proximal end of the guiding tube unit 200 and is detachably connected to the linkage unit 700, and is used for driving the guiding tube unit 200 to reciprocate axially along the sheath tube unit 100 when connected to the linkage unit 700.

[0345] Specifically, the first linkage element 206 is arranged at the proximal end of the guiding tube element 201 and is slidably connected to the first sliding element 103.

[0346] The first linkage element 206 and the guiding tube element 201 can be fixedly connected or detachably connected. For example, integrally formed.

[0347] In some of these embodiments, the first linkage element 206 includes a first sliding member, a first support member, and a first linkage member. Among them, the first sliding member is arranged at the proximal end of the guiding tube element 201 and is slidably connected to the first sliding element 103; the first support member is arranged at the proximal end of the guiding tube element 201, and the distal end of the first support member is connected to the first sliding member; the first linkage member is arranged at the top of the first support member and is detachably connected to the linkage unit 700.

[0348] The size of the first sliding member matches the size of the guiding tube element 201. Generally, the height of the first sliding member is less than the radial dimension of the guiding tube element 201.

[0349] The size of the first sliding member matches the size of the first sliding element 103. Generally, the height of the first sliding member is equal to the height of the first sliding element 103, the length of the first sliding member is greater than the width of the first sliding element 103, and the width of the first sliding member is less than the length of the first sliding element 103.

[0350] In some of these embodiments, the first sliding member includes, but is not limited to, a slider.

[0351] The size of the first support member matches the size of the first sliding member. Generally, the height of the first support member is not less than the height of the first sliding member, and the length of the first support member is greater than the width of the first sliding member.

[0352] In some of these embodiments, the first support member includes, but is not limited to, a support rod.

[0353] The size of the first linkage member matches the size of the first support member. Generally, the radial dimensions (such as length and width) of the first linkage member are not greater than the length and width of the first support member.

[0354] In some of these embodiments, the first linkage member includes, but is not limited to, a linkage block.

[0355] As Figure 23 shown, the electrode needle unit 300 further includes a second linkage element 307 and a first rack element 310. Among them, the second linkage element 307 is disposed at the proximal end of the electrode needle unit 300 and is connected to the linkage unit 700 for driving the linkage unit 700 to reciprocate; the first rack element 310 is disposed at the proximal end of the electrode needle unit 300, the distal end of the first rack element 310 is connected to the proximal end of the electrode needle unit 300, and is engaged with the meshing drive unit 900 for driving the electrode needle unit 300 to reciprocate axially along the guide tube unit 200 under the action of the meshing drive unit 900.

[0356] Specifically, the second linkage element 307 is disposed at the proximal end of the electrode needle element 301 (outer needle member) and is slidably connected to the first sliding element 103 and the second sliding element 203 respectively; the first rack element 310 is disposed at the proximal end of the electrode needle element 301 (outer needle member) and is connected to the second linkage element 307.

[0357] The second linkage element 307 and the electrode needle element 301 can be fixedly connected or detachably connected. For example, integrally formed.

[0358] In some of these embodiments, the second linkage element 307 includes a second sliding member, a second support member, and a second linkage member. Among them, the second sliding member is disposed at the proximal end of the electrode needle element 301 and is slidably connected to the first sliding element 103 and the second sliding element 203; the second support member is disposed at the proximal end of the electrode needle element 301, the distal end of the second support member is connected to the second sliding member, and the proximal end of the second support member is connected to the distal end of the third link element 308; the second linkage member is disposed at the top of the second support member and is detachably connected to the linkage unit 700.

[0359] The size of the second sliding member matches the size of the electrode needle element 301. Generally, the height of the second sliding member is less than the radial dimension of the electrode needle element 301.

[0360] The size of the second sliding member matches the size of the first sliding element 103 (the second sliding element 203). Generally, the height of the second sliding member is equal to the height of the first sliding element 103 (the second sliding element 203), the length of the second sliding member is greater than the width of the first sliding element 103 (the second sliding element 203), and the width of the second sliding member is less than the length of the first sliding element 103 (the second sliding element 203).

[0361] In some of these embodiments, the second sliding member includes, but is not limited to, a slider.

[0362] The size of the second support member matches the size of the second sliding member. Generally, the height of the second support member is not less than the height of the second sliding member, and the length of the second support member is greater than the width of the second sliding member.

[0363] In some of these embodiments, the second support member includes, but is not limited to, a support rod.

[0364] The size of the second linkage member matches the size of the second support member. Generally, the radial dimensions (such as length and width) of the second linkage member are not greater than the length and width of the second support member.

[0365] In some of these embodiments, the second linkage member includes, but is not limited to, a linkage block.

[0366] The connection manner between the first rack element 310 and the second linkage element 307 includes, but is not limited to, bonding, snap connection, etc.

[0367] In some of these embodiments, the first rack element 310 includes a first connecting member and a first tooth condition. Among them, the connecting member is disposed at the proximal end of the electrode needle element 301 (outer needle member), the distal end of the first connecting member is connected to the proximal end of the second linkage element 307 (second support member); the first tooth condition is disposed at the proximal end of the first connecting member, the distal end of the first tooth condition is connected to the proximal end of the first connecting member, and is meshed and connected with the meshing drive unit 900.

[0368] In some of these embodiments, the first connecting member includes, but is not limited to, a connecting rod.

[0369] In some of these embodiments, the first tooth condition includes, but is not limited to, a rack.

[0370] Such as Figure 20As shown, the linkage unit 700 includes a third linkage element 701, a fourth linkage element 702, and a fifth linkage element 703. Among them, the third linkage element 701 is movably disposed on the side of the guide tube unit 200 and the side of the electrode needle unit 300; the fourth linkage element 702 is disposed on the side of the third linkage element 701, and is detachably connected to the guide tube unit 200 and connected to the electrode needle unit 300, and is used to drive the third linkage element 701 to reciprocate under the action of the electrode needle unit 300; the fifth linkage element 703 is disposed on the side of the third linkage element 701 and communicates with the fourth linkage element 702, and is used to allow the guide tube unit 200 to enter or leave the fourth linkage element 702.

[0371] Specifically, the third linkage element 701 is movably disposed on the upper side of the guide tube element 201 and the upper side of the electrode needle element 301; the fourth linkage element 702 is detachably connected to the first linkage element 206 and connected to the second linkage element 307, and is used to drive the third linkage element 701 to reciprocate under the action of the second linkage element 307; the fifth linkage element 703 is used to allow the first linkage element 206 to enter or leave the fourth linkage element 702.

[0372] Generally, the moving direction of the third linkage element 701 is perpendicular to the moving directions of the guide tube element 201 and the electrode needle element 301. That is, the third linkage element 701 can reciprocate along the X-axis direction to connect or separate the fourth linkage element 702 from the first linkage element 206, and then, when the fourth linkage element 702 is connected to the first linkage element 206, the guide tube element 201 and the electrode needle element 301 move together along the Y-axis direction, and when the fourth linkage element 702 is separated from the first linkage element 206, the electrode needle element 301 moves alone along the Y-axis direction.

[0373] In the present invention, the linkage unit 700 can be used to move the guide tube unit 200 and the electrode needle unit 300 together, or to keep the guide tube unit 200 stationary and the electrode needle unit 300 move alone.

[0374] In some of the embodiments, the third linkage element 701 includes a linkage block, a first pushing member, and a second pushing member. Among them, the linkage block is movably disposed on the upper side of the guide tube element 201 and the upper side of the electrode needle element 301, and the fourth linkage element 702 and the fifth linkage element 703 are disposed at the bottom end of the linkage block; the first pushing member is disposed on the first side of the linkage block and is used to push the linkage block to move; the second pushing member is disposed on the second side of the linkage block and is used to push the linkage block to move.

[0375] The fourth linkage element 702 penetrates through the bottom of the third linkage element 701.

[0376] The size of the fourth linkage element 702 matches the size of the third linkage element 701. Generally, the length of the fourth linkage element 702 is not greater than the length of the third linkage element 701, the height of the fourth linkage element 702 is less than the height of the third linkage element 701, and the width of the fourth linkage element 702 is less than the width of the third linkage element 701.

[0377] In some of these embodiments, the fourth linkage element 702 includes, but is not limited to, a linkage groove.

[0378] The fifth linkage element 703 is disposed through the bottom and proximal end of the third linkage element 701.

[0379] The fifth linkage element 703 and the fourth linkage element 702 form an "L" shaped structure.

[0380] The size of the fifth linkage element 703 matches the size of the third linkage element 701. Generally, the length of the fifth linkage element 703 is less than the length of the third linkage element 701, the height of the fifth linkage element 703 is less than the height of the third linkage element 701, and the width of the fifth linkage element 703 is less than the width of the third linkage element 701.

[0381] The size of the fifth linkage element 703 matches the size of the fourth linkage element 702. Generally, the length of the fifth linkage element 703 is less than the length of the fourth linkage element 702, the height of the fifth linkage element 703 is equal to the height of the fourth linkage element 702, and the width of the fifth linkage element 703 is greater than the width of the fourth linkage element 702.

[0382] In some of these embodiments, the fifth linkage element 703 includes, but is not limited to, a linkage groove.

[0383] As Figure 24 shown, the meshing drive unit 900 includes a fifth control element 901, a second rack element 902, a first gear element 903, and a second gear element 904. Among them, the fifth control element 901 is movably disposed at the proximal end of the electrode needle unit 300; the second rack element 902 is disposed at the end of the fifth control element 901 for reciprocating movement under the action of the fifth control element 901; the first gear element 903 is movably disposed at the end of the fifth control element 901 and meshes with the second rack element 902 for reciprocating rotation under the action of the second rack element 902; the second gear element 904 is coaxially disposed with the first gear element 903 and meshes with the electrode needle unit 300 for driving the electrode needle unit 300 to reciprocate axially along the guide tube unit 200 under the action of the first gear element 903.

[0384] Specifically, the fifth control element 901 is movably arranged at the proximal end of the electrode needle element 301; the second gear element 904 meshes with the first rack element 310 and is used to drive the electrode needle element 301 to reciprocate axially along the guide tube element 201 through the first rack element 310.

[0385] The working principle of the meshing drive unit 900 is to convert rotational motion into linear motion, so that the electrode needle element 301 can perform linear reciprocating motion.

[0386] The fifth control element 901 is rotatably arranged at the proximal end of the electrode needle element 301.

[0387] In some of these embodiments, the fifth control element 901 includes, but is not limited to, a control trigger.

[0388] The second rack element 902 is arranged at the top of the fifth control element 901 and is used to reciprocate rotationally under the action of the fifth control element 901.

[0389] The cross-section of the second rack element 902 is arc-shaped. Specifically, the middle of the second rack element 902 is higher than the two ends of the second rack element 902.

[0390] In some of these embodiments, the second rack element 902 includes, but is not limited to, a rack.

[0391] In some of these embodiments, the first gear element 903 includes, but is not limited to, a gear.

[0392] The second gear element 904 and the first gear element 903 can be detachably connected or fixedly connected. For example, snap connection, integrally formed, etc.

[0393] The size of the second gear element 904 matches the size of the first gear element 903. Generally, the radial size of the second gear element 904 is larger than the radial size of the first gear element 903.

[0394] In some of these embodiments, the second gear element 904 includes, but is not limited to, a gear.

[0395] Furthermore, the meshing drive unit 900 further includes a sixth rotating element 905. Among them, the sixth rotating element 905 is connected to the fourth control element 801 and is used to rotate the fourth control element 801.

[0396] The sixth rotating element 905 is arranged in the middle of the fifth control element 901. For example, the sixth rotating element 905 is arranged close to the second rack element 902.

[0397] By using the sixth rotating element 905, the fifth control element 901 can be rotated about the axis of the sixth rotating element 905, thereby defining the rotation center of the fifth control element 901.

[0398] The sixth rotating element 905 and the fifth control element 901 can be detachably connected or fixedly connected. For example, plugging, integrally molding, etc.

[0399] In some of these embodiments, the sixth rotating element 905 includes, but is not limited to, a rotating shaft.

[0400] Furthermore, the meshing drive unit 900 further includes a seventh rotating element 906. Wherein, the seventh rotating element 906 is connected to the first gear element 903 and the second gear element 904, and is used to rotate the first gear element 903 and the second gear element 904.

[0401] The seventh rotating element 906 is coaxially arranged with the first gear element 903 and the second gear element 904.

[0402] By using the seventh rotating element 906, the first gear element 903 and the second gear element 904 can be rotated about the axis of the seventh rotating element 906, thereby defining the rotation centers of the first gear element 903 and the second gear element 904.

[0403] The seventh rotating element 906 and the first gear element 903, the second gear element 904 can be detachably connected or fixedly connected. For example, plugging, integrally molding, etc.

[0404] In some of these embodiments, the seventh rotating element 906 includes, but is not limited to, a rotating shaft.

[0405] The usage method of this embodiment is as follows:

[0406] Penetrate the sheath element 101 through the cortical bone and drive it into the cancellous bone. At this time, the distal end of the guide tube element 201 is located inside the distal end of the sheath element 101, and the distal end of the electrode needle element 301 is flush with the distal end of the guide tube element 201;

[0407] Operate the third linkage element 701 so that the first linkage element 206 enters the fourth linkage element 702 through the fifth linkage element 703;

[0408] Rotate the fifth control element 901 in the first direction (such as the clockwise direction). Under the cooperation of the second rack element 902 and the first gear element 903, the second gear element 904 rotates in the first direction. Under the cooperation of the second gear element 904 and the first rack element 310, the first rack element 310 drives the electrode needle element 301 and the guide tube element 201 to move towards the distal end of the sheath element 101;

[0409] When the distal end of the guide tube element 201 is exposed through the opening element 102, stop the fifth control element 901 and operate the third linkage element 701 to separate the first linkage element 206 from the fourth linkage element 702;

[0410] Rotate the fifth control element 901 in the first direction (such as the clockwise direction). Under the cooperation of the second rack element 902 and the first gear element 903, the second gear element 904 rotates in the first direction. Under the cooperation of the second gear element 904 and the first rack element 310, the first rack element 310 drives the distal end of the electrode needle element 301 away from the distal end of the guide tube element 201 and reaches the radiofrequency ablation position, then stop the fifth control element 901;

[0411] Start the power supply. A plurality of electrode plate elements 303 form an electric field to heat and ablate the nerve, thus completing the radiofrequency ablation operation. Among them, the electric field heating temperature is not higher than 85 °C; since the surrounding of the radiofrequency ablation position is all cancellous bone and the heating temperature is not higher than 85 °C, it will not cause excessive damage to the surrounding tissues;

[0412] After the radiofrequency ablation operation is completed, rotate the fifth control element 901 in the second direction (such as the counterclockwise direction). Under the cooperation of the second rack element 902 and the first gear element 903, the second gear element 904 rotates in the second direction. Under the cooperation of the second gear element 904 and the first rack element 310, the first rack element 310 drives the distal end of the electrode needle element 301 close to the distal end of the guide tube element 201 until the distal end of the electrode needle element 301 is flush with the distal end of the guide tube element 201, then stop the fifth control element 901;

[0413] Operate the third linkage element 701 to enable the first linkage element 206 to enter the fourth linkage element 702 through the fifth linkage element 703;

[0414] Rotate the fifth control element 901 in the second direction (such as the counterclockwise direction). Under the cooperation of the second rack element 902 and the first gear element 903, the second gear element 904 rotates in the second direction. Under the cooperation of the second gear element 904 and the first rack element 310, the first rack element 310 drives the distal ends of the electrode needle element 301 and the guide tube element 201 close to the sheath element 101 and enters the interior of the sheath element 101 through the opening element 102, then stop the fifth control element 901;

[0415] Finally, remove the sheath element 101.

[0416] The technical effects of the present invention are as follows: By using the linkage cooperation between the linkage unit, the guide tube unit, and the electrode needle unit, the electrode needle unit can move independently, or the guide tube unit and the electrode needle unit can move simultaneously, thus achieving precise control; by using the gear-rack drive cooperation between the meshing drive unit and the electrode needle unit, the moving speed and moving position of the electrode needle unit can be precisely controlled, facilitating the precise control of the electrode needle unit.

[0417] Embodiment 6

[0418] This embodiment is a variant embodiment of Embodiment 1.

[0419] As Figure 25 shown, the radiofrequency ablation device further includes a linkage unit 700 and a ratchet drive unit 1000. Among them, the linkage unit 700 is detachably connected to the guide tube unit 200 and is connected to the electrode needle unit 300, and is used to make the guide tube unit 200 and the electrode needle unit 300 move simultaneously when connected to the guide tube unit 200 or make the electrode needle unit 300 move independently when separated from the guide tube unit 200; the ratchet drive unit 1000 is connected to the proximal end of the electrode needle unit 300 and is used to drive the electrode needle unit 300 to reciprocate axially along the guide tube unit 200.

[0420] As Figure 12 shown, the sheath tube unit 100 further includes at least one first sliding element 103. Among them, the first sliding element 103 is disposed at the proximal end of the sheath tube unit 100 and penetrates through the side portion of the sheath tube unit 100.

[0421] Specifically, the first sliding element 103 is disposed at the proximal end of the sheath tube element 101 and penetrates through the side portion of the sheath tube element 101.

[0422] In some of these embodiments, there are two first sliding elements 103. The two first sliding elements 103 are symmetrically disposed on both sides of the sheath tube element 101.

[0423] In some of these embodiments, the first sliding element 103 includes, but is not limited to, a sliding slit and a sliding groove.

[0424] As Figure 19 shown, the guide tube unit 200 further includes at least one second sliding element 203. Among them, the second sliding element 203 is disposed at the proximal end of the guide tube unit 200 and penetrates through the side portion of the guide tube unit 200.

[0425] Specifically, the second sliding element 203 is disposed at the proximal end of the guide tube element 201 and penetrates through the side portion of the guide tube element 201.

[0426] In some of these embodiments, there are two second sliding elements 203. The two second sliding elements 203 are symmetrically arranged on both sides of the guiding tube element 201.

[0427] In some of these embodiments, the second sliding element 203 includes, but is not limited to, a sliding slit and a sliding groove.

[0428] Further, the guiding tube unit 200 further includes a first linkage element 206. The first linkage element 206 is arranged at the proximal end of the guiding tube unit 200 and is detachably connected to the linkage unit 700, and is used for driving the guiding tube unit 200 to reciprocate axially along the sheath tube unit 100 when connected to the linkage unit 700.

[0429] Specifically, the first linkage element 206 is arranged at the proximal end of the guiding tube element 201 and is slidably connected to the first sliding element 103.

[0430] The first linkage element 206 and the guiding tube element 201 can be fixedly connected or detachably connected. For example, they are integrally formed.

[0431] In some of these embodiments, the first linkage element 206 includes a first sliding member, a first support member, and a first linkage member. Among them, the first sliding member is arranged at the proximal end of the guiding tube element 201 and is slidably connected to the first sliding element 103; the first support member is arranged at the proximal end of the guiding tube element 201, and the distal end of the first support member is connected to the first sliding member; the first linkage member is arranged at the top of the first support member and is detachably connected to the linkage unit 700.

[0432] The size of the first sliding member matches the size of the guiding tube element 201. Generally, the height of the first sliding member is less than the radial dimension of the guiding tube element 201.

[0433] The size of the first sliding member matches the size of the first sliding element 103. Generally, the height of the first sliding member is equal to the height of the first sliding element 103, the length of the first sliding member is greater than the width of the first sliding element 103, and the width of the first sliding member is less than the length of the first sliding element 103.

[0434] In some of these embodiments, the first sliding member includes, but is not limited to, a slider.

[0435] The size of the first support member matches the size of the first sliding member. Generally, the height of the first support member is not less than the height of the first sliding member, and the length of the first support member is greater than the width of the first sliding member.

[0436] In some of these embodiments, the first support member includes, but is not limited to, a support rod.

[0437] The size of the first linkage member matches the size of the first support member. Generally, the radial dimensions (such as length and width) of the first linkage member are not greater than the length and width of the first support member.

[0438] In some of these embodiments, the first linkage member includes, but is not limited to, a linkage block.

[0439] Such as Figure 26 As shown, the electrode needle unit 300 further includes a second linkage element 307 and a third rack element 311. Among them, the second linkage element 307 is disposed at the proximal end of the electrode needle unit 300 and is connected to the linkage unit 700 for driving the linkage unit 700 to reciprocate; the third rack element 311 is disposed at the proximal end of the electrode needle unit 300, the distal end of the third rack element 311 is connected to the proximal end of the electrode needle unit 300, and is engaged with the ratchet drive unit 1000 for driving the electrode needle unit 300 to reciprocate axially along the guide tube unit 200 under the action of the ratchet drive unit 1000.

[0440] Specifically, the second linkage element 307 is disposed at the proximal end of the electrode needle element 301 (outer needle member) and is slidably connected to the first sliding element 103 and the second sliding element 203 respectively; the third rack element 311 is disposed at the proximal end of the electrode needle element 301 (outer needle member) and is connected to the second linkage element 307.

[0441] The second linkage element 307 and the electrode needle element 301 can be fixedly connected or detachably connected. For example, integrally formed.

[0442] In some of these embodiments, the second linkage element 307 includes a second sliding member, a second support member, and a second linkage member. Among them, the second sliding member is disposed at the proximal end of the electrode needle element 301 and is slidably connected to the first sliding element 103 and the second sliding element 203; the second support member is disposed at the proximal end of the electrode needle element 301, the distal end of the second support member is connected to the second sliding member, and the proximal end of the second support member is connected to the distal end of the third link element 308; the second linkage member is disposed at the top of the second support member and is detachably connected to the linkage unit 700.

[0443] The size of the second sliding member matches the size of the electrode needle element 301. Generally, the height of the second sliding member is less than the radial dimension of the electrode needle element 301.

[0444] The size of the second sliding member matches the size of the first sliding element 103 (second sliding element 203). Generally, the height of the second sliding member is equal to the height of the first sliding element 103 (second sliding element 203), the length of the second sliding member is greater than the width of the first sliding element 103 (second sliding element 203), and the width of the second sliding member is less than the length of the first sliding element 103 (second sliding element 203).

[0445] In some of these embodiments, the second sliding member includes, but is not limited to, a slider.

[0446] The size of the second support member matches the size of the second sliding member. Generally, the height of the second support member is not less than the height of the second sliding member, and the length of the second support member is greater than the width of the second sliding member.

[0447] In some of these embodiments, the second support member includes, but is not limited to, a support rod.

[0448] The size of the second linkage member matches the size of the second support member. Generally, the radial dimensions (such as length and width) of the second linkage member are not greater than the length and width of the second support member.

[0449] In some of these embodiments, the second linkage member includes, but is not limited to, a linkage block.

[0450] The connection method between the third rack element 311 and the second linkage element 307 includes, but is not limited to, bonding, clamping, etc.

[0451] In some of these embodiments, the third rack element 311 includes a second connecting member and a second toothed condition. Among them, the connecting member is disposed at the proximal end of the electrode needle element 301 (outer needle member), the distal end of the second connecting member is connected to the proximal end of the second linkage element 307 (second support member); the second toothed condition is disposed at the proximal end of the second connecting member, the distal end of the second toothed condition is connected to the proximal end of the second connecting member, and is meshed and connected with the ratchet driving unit 1000.

[0452] In some of these embodiments, the second connecting member includes, but is not limited to, a connecting rod.

[0453] In some of these embodiments, the second toothed condition includes, but is not limited to, a rack.

[0454] Such as Figure 20As shown, the linkage unit 700 includes a third linkage element 701, a fourth linkage element 702, and a fifth linkage element 703. Among them, the third linkage element 701 is movably disposed on the side of the guide tube unit 200 and the side of the electrode needle unit 300; the fourth linkage element 702 is disposed on the side of the third linkage element 701, and is detachably connected to the guide tube unit 200 and connected to the electrode needle unit 300, and is used to drive the third linkage element 701 to reciprocate under the action of the electrode needle unit 300; the fifth linkage element 703 is disposed on the side of the third linkage element 701 and communicates with the fourth linkage element 702, and is used to allow the guide tube unit 200 to enter or leave the fourth linkage element 702.

[0455] Specifically, the third linkage element 701 is movably disposed on the upper side of the guide tube element 201 and the upper side of the electrode needle element 301; the fourth linkage element 702 is detachably connected to the first linkage element 206 and connected to the second linkage element 307, and is used to drive the third linkage element 701 to reciprocate under the action of the second linkage element 307; the fifth linkage element 703 is used to allow the first linkage element 206 to enter or leave the fourth linkage element 702.

[0456] Generally, the moving direction of the third linkage element 701 is perpendicular to the moving directions of the guide tube element 201 and the electrode needle element 301. That is, the third linkage element 701 can reciprocate along the X-axis direction to connect or separate the fourth linkage element 702 from the first linkage element 206, and further, when the fourth linkage element 702 is connected to the first linkage element 206, the guide tube element 201 and the electrode needle element 301 move together along the Y-axis direction, and when the fourth linkage element 702 is separated from the first linkage element 206, the electrode needle element 301 moves alone along the Y-axis direction.

[0457] In the present invention, the linkage unit 700 can be used to move the guide tube unit 200 and the electrode needle unit 300 together, or to keep the guide tube unit 200 stationary and the electrode needle unit 300 move alone.

[0458] In some of the embodiments, the third linkage element 701 includes a linkage block, a first pusher, and a second pusher. Among them, the linkage block is movably disposed on the upper side of the guide tube element 201 and the upper side of the electrode needle element 301, and the fourth linkage element 702 and the fifth linkage element 703 are disposed at the bottom end of the linkage block; the first pusher is disposed on the first side of the linkage block and is used to push the linkage block to move; the second pusher is disposed on the second side of the linkage block and is used to push the linkage block to move.

[0459] The fourth linkage element 702 penetrates through the bottom of the third linkage element 701.

[0460] The size of the fourth linkage element 702 matches the size of the third linkage element 701. Generally, the length of the fourth linkage element 702 is not greater than the length of the third linkage element 701, the height of the fourth linkage element 702 is less than the height of the third linkage element 701, and the width of the fourth linkage element 702 is less than the width of the third linkage element 701.

[0461] In some of these embodiments, the fourth linkage element 702 includes, but is not limited to, a linkage groove.

[0462] The fifth linkage element 703 is disposed through the bottom and proximal end of the third linkage element 701.

[0463] The fifth linkage element 703 and the fourth linkage element 702 form an "L" shaped structure.

[0464] The size of the fifth linkage element 703 matches the size of the third linkage element 701. Generally, the length of the fifth linkage element 703 is less than the length of the third linkage element 701, the height of the fifth linkage element 703 is less than the height of the third linkage element 701, and the width of the fifth linkage element 703 is less than the width of the third linkage element 701.

[0465] The size of the fifth linkage element 703 matches the size of the fourth linkage element 702. Generally, the length of the fifth linkage element 703 is less than the length of the fourth linkage element 702, the height of the fifth linkage element 703 is equal to the height of the fourth linkage element 702, and the width of the fifth linkage element 703 is greater than the width of the fourth linkage element 702.

[0466] In some of these embodiments, the fifth linkage element 703 includes, but is not limited to, a linkage groove.

[0467] Such as Figure 27As shown, the ratchet drive unit 1000 includes a sixth control element 1001, a fourth rack element 1002, a first ratchet element 1003, a second ratchet element 1004, a third gear element 1005, a fourth gear element 1006, a fifth gear element 1007, a seventh control element 1008, and an eighth control element 1009. Among them, the sixth control element 1001 is movably arranged at the proximal end of the electrode needle unit 300; the fourth rack element 1002 is arranged at the end of the sixth control element 1001 and is used for reciprocating movement under the action of the sixth control element 1001; the first ratchet element 1003 is movably arranged at the end of the sixth control element 1001 and is removably engaged with the fourth rack element 1002 for reciprocating rotation under the action of the fourth rack element 1002; the second ratchet element 1004 is coaxially arranged with the first ratchet element 1003, cooperates with the first ratchet element 1003, and is removably engaged with the fourth rack element 1002 for rotating in the first direction under the action of the first ratchet element 1003 or rotating in the second direction under the action of the fourth rack element 1002; the third gear element 1005 is coaxially arranged with the second ratchet element 1004 and is removably engaged with the electrode needle unit 300 for driving the electrode needle unit 300 to move unidirectionally along the axial direction of the guide tube unit 200 under the action of the second ratchet element 1004; the fourth gear element 1006 is engaged with the third gear element 1005 for rotating under the action of the third gear element 1005; the fifth gear element 1007 is coaxially arranged with the fourth gear element 1006 and is removably engaged with the electrode needle unit 300 for driving the electrode needle unit 300 to move unidirectionally along the axial direction of the guide tube unit 200 under the action of the fourth gear element 1006; the seventh control element 1008 is movably arranged on the first side of the ratchet drive unit 1000 and abuts against the first side of the third gear element 1005 and the first side of the fifth gear element 1007 respectively, for moving along the axial direction of the third gear element 1005 to separate the third gear element 1005 from the electrode needle unit 300 and moving along the axial direction of the fifth gear element 1007 to engage the fifth gear element 1007 with the electrode needle unit 300; the eighth control element 1009 is movably arranged on the second side of the ratchet drive unit 1000 and abuts against the second side of the third gear element 1005 and the second side of the fifth gear element 1007 respectively, for moving along the axial direction of the third gear element 1005 to engage the third gear element 1005 with the electrode needle unit 300 and moving along the axial direction of the fifth gear element 1007 to separate the fifth gear element 1007 from the electrode needle unit 300.

[0468] Specifically, the sixth control element 1001 is movably arranged at the proximal end of the electrode needle element 301; the third gear element 1005 is removably engaged with the third rack element 311 for driving the electrode needle element 301 to move unidirectionally along the axial direction of the guide tube element 201 through the third rack element 311; the fifth gear element 1007 is removably engaged with the third rack element 311 for driving the electrode needle element 301 to move unidirectionally along the axial direction of the guide tube element 201 through the third rack element 311; the seventh control element 1008 is movably arranged on the first side of the electrode needle element 301 for moving axially along the third gear element 1005 to separate the third gear element 1005 from the third rack element 311 and moving axially along the fifth gear element 1007 to engage the fifth gear element 1007 with the third rack element 311; the eighth control element 1009 is movably arranged on the second side of the electrode needle element 301 for moving axially along the third gear element 1005 to engage the third gear element 1005 with the third rack element 311 and moving axially along the fifth gear element 1007 to separate the fifth gear element 1007 from the third rack element 311.

[0469] The working principle of the ratchet drive unit 1000 is to convert rotational motion into linear motion so that the electrode needle element 301 can perform linear reciprocating motion.

[0470] The sixth control element 1001 is rotatably arranged at the proximal end of the electrode needle element 301.

[0471] In some of these embodiments, the sixth control element 1001 includes, but is not limited to, a control trigger.

[0472] The fourth rack element 1002 is arranged at the top of the sixth control element 1001 for reciprocating rotation under the action of the sixth control element 1001.

[0473] The cross-section of the fourth rack element 1002 is arc-shaped. Specifically, the middle of the fourth rack element 1002 is higher than both ends of the fourth rack element 1002.

[0474] In some of these embodiments, the fourth rack element 1002 includes, but is not limited to, a rack.

[0475] In some of these embodiments, the first ratchet element 1003 includes, but is not limited to, a ratchet gear.

[0476] The second ratchet element 1004 is sleeved on and cooperates with the first ratchet element 1003. Specifically as follows:

[0477] 1) When the first ratchet element 1003 meshes with the fourth rack element 1002 and the second ratchet element 1004 is separated from the fourth rack element 1002, when the first ratchet element 1003 rotates in the first direction, the second ratchet element 1004 rotates following the first ratchet element 1003; when the first ratchet element 1003 rotates in the second direction, due to the one-way cooperation, the second ratchet element 1004 does not rotate following the first ratchet element 1003. That is, the sixth control element 1001 cannot drive the first ratchet element 1003 to rotate in the second direction.

[0478] 2) When the first ratchet element 1003 is separated from the fourth rack element 1002 and the second ratchet element 1004 meshes with the fourth rack element 1002, when the second ratchet element 1004 rotates in the second direction, the first ratchet element 1003 rotates following the second ratchet element 1004; when the second ratchet element 1004 rotates in the first direction, due to the one-way cooperation, the first ratchet element 1003 does not rotate following the second ratchet element 1004. That is, the sixth control element 1001 cannot drive the second ratchet element 1004 to rotate in the first direction.

[0479] In some of these embodiments, the second ratchet element 1004 includes, but is not limited to, a ratchet gear.

[0480] The third gear element 1005 and the second ratchet element 1004 can be detachably connected or fixedly connected. For example, snap connection, integrally formed, etc.

[0481] The size of the third gear element 1005 matches the size of the second ratchet element 1004. Generally, the radial size of the third gear element 1005 is larger than the radial size of the second ratchet element 1004.

[0482] The number of the third gear elements 1005 matches the number of the third rack elements 311. Generally, the number of the third gear elements 1005 is equal to the number of the third rack elements 311.

[0483] In some of these embodiments, the third gear element 1005 includes, but is not limited to, a gear.

[0484] The size of the fourth gear element 1006 matches the size of the third gear element 1005. Generally, the radial size of the fourth gear element 1006 is smaller than the radial size of the third gear element 1005.

[0485] In some of these embodiments, the fourth gear element 1006 includes, but is not limited to, a gear.

[0486] The size of the fifth gear element 1007 matches the size of the fourth gear element 1006. Generally, the radial size of the fifth gear element 1007 is larger than the radial size of the fourth gear element 1006.

[0487] The size of the fifth gear element 1007 matches the size of the third gear element 1005. Generally, the radial size of the fifth gear element 1007 is equal to the radial size of the third gear element 1005.

[0488] In some of these embodiments, the fifth gear element 1007 includes, but is not limited to, gears.

[0489] In some of these embodiments, the seventh control element 1008 includes, but is not limited to, control buttons.

[0490] In some of these embodiments, the eighth control element 1009 includes, but is not limited to, control buttons.

[0491] Furthermore, the ratchet drive unit 1000 further includes an eighth rotating element 1010. Among them, the eighth rotating element 1010 is connected to the fifth control element 901 and is used to rotate the fifth control element 901.

[0492] The eighth rotating element 1010 is disposed in the middle of the sixth control element 1001. For example, the eighth rotating element 1010 is disposed close to the fourth rack element 1002.

[0493] By using the eighth rotating element 1010, the sixth control element 1001 can be rotated about the axis of the eighth rotating element 1010, thereby defining the rotation center of the sixth control element 1001.

[0494] The eighth rotating element 1010 and the sixth control element 1001 can be detachably connected or fixedly connected. For example, plugging, integrally forming, etc.

[0495] In some of these embodiments, the eighth rotating element 1010 includes, but is not limited to, a rotating shaft.

[0496] Furthermore, the ratchet drive unit 1000 further includes a ninth rotating element 1011. Among them, the ninth rotating element 1011 is connected to the first ratchet element 1003, the second ratchet element 1004, and the third gear element 1005 and is used to rotate the first ratchet element 1003, the second ratchet element 1004, and the third gear element 1005.

[0497] The ninth rotating element 1011 is coaxially disposed with the first ratchet element 1003, the second ratchet element 1004, and the third gear element 1005.

[0498] By using the ninth rotating element 1011, the first ratchet element 1003, the second ratchet element 1004, and the third gear element 1005 can rotate about the axis of the ninth rotating element 1011, thereby defining the rotation centers of the first ratchet element 1003, the second ratchet element 1004, and the third gear element 1005.

[0499] The ninth rotating element 1011 can be detachably connected or fixedly connected to the first ratchet element 1003, the second ratchet element 1004, and the third gear element 1005. For example, plugging, integrally molding, etc.

[0500] In some of these embodiments, the ninth rotating element 1011 includes, but is not limited to, a rotating shaft.

[0501] Further, the ratchet driving unit 1000 further includes a tenth rotating element 1012. Among them, the tenth rotating element 1012 is connected to the fourth gear element 1006 and the fifth gear element 1007 and is used to rotate the fourth gear element 1006 and the fifth gear element 1007.

[0502] The tenth rotating element 1012 is coaxially arranged with the fourth gear element 1006 and the fifth gear element 1007.

[0503] By using the tenth rotating element 1012, the fourth gear element 1006 and the fifth gear element 1007 can rotate about the axis of the tenth rotating element 1012, thereby defining the rotation centers of the fourth gear element 1006 and the fifth gear element 1007.

[0504] The tenth rotating element 1012 can be detachably connected or fixedly connected to the fourth gear element 1006 and the fifth gear element 1007. For example, plugging, integrally molding, etc.

[0505] In some of these embodiments, the tenth rotating element 1012 includes, but is not limited to, a rotating shaft.

[0506] Further, the ratchet driving unit 1000 further includes at least one fifth limiting element 1013. The fifth limiting element 1013 is arranged on the side of the sixth control element 1001 and abuts against the first side of the third gear element 1005, and is used to move axially along the third gear element 1005 under the action of the sixth control element 1001 so that the third gear element 1005 is separated from the electrode needle unit 300.

[0507] The fifth limiting element 1013 can be detachably connected or fixedly connected to the seventh control element 1008. For example, plugging, integrally molding, etc.

[0508] In some of these embodiments, there are a plurality of fifth limiting elements 1013. The plurality of fifth limiting elements 1013 are arranged at intervals along the length direction and / or the height direction of the seventh control element 1008.

[0509] In some of these embodiments, the fifth limiting element 1013 includes, but is not limited to, a limiting rod.

[0510] Furthermore, the ratchet driving unit 1000 further includes at least one sixth limiting element 1014. The sixth limiting element 1014 is arranged on the side of the sixth control element 1001 and abuts against the first side of the fifth gear element 1007, and is used to move axially along the fifth gear element 1007 under the action of the sixth control element 1001 so that the fifth gear element 1007 meshes with the electrode needle unit 300.

[0511] The sixth limiting element 1014 and the seventh control element 1008 can be detachably connected or fixedly connected. For example, plugging, integrally molding, etc.

[0512] In some of these embodiments, there are a plurality of sixth limiting elements 1014. The plurality of sixth limiting elements 1014 are arranged at intervals along the length direction and / or the height direction of the seventh control element 1008.

[0513] In some of these embodiments, the sixth limiting element 1014 includes, but is not limited to, a limiting rod.

[0514] Furthermore, the ratchet driving unit 1000 further includes at least one seventh limiting element 1015. Among them, the seventh limiting element 1015 is arranged on the side of the seventh control element 1008 and abuts against the second side of the third gear element 1005, and is used to move axially along the third gear element 1005 under the action of the seventh control element 1008 so that the third gear element 1005 meshes with the electrode needle unit 300.

[0515] The seventh limiting element 1015 and the eighth control element 1009 can be detachably connected or fixedly connected. For example, plugging, integrally molding, etc.

[0516] In some of these embodiments, there are a plurality of seventh limiting elements 1015. The plurality of seventh limiting elements 1015 are arranged at intervals along the length direction and / or the height direction of the eighth control element 1009.

[0517] In some of these embodiments, the seventh limiting element 1015 includes, but is not limited to, a limiting rod.

[0518] Further, the ratchet drive unit 1000 further includes at least one eighth limiting element 1016. The eighth limiting element 1016 is disposed on the side of the seventh control element 1008 and abuts against the second side of the fifth gear element 1007, and is configured to move axially along the fifth gear element 1007 under the action of the seventh control element 1008 to separate the fifth gear element 1007 from the electrode needle unit 300.

[0519] The eighth limiting element 1016 and the eighth control element 1009 may be detachably connected or fixedly connected. For example, plugging, integrally molding, etc.

[0520] In some embodiments, there are a plurality of eighth limiting elements 1016. The plurality of eighth limiting elements 1016 are spaced apart along the length direction and / or the height direction of the eighth control element 1009.

[0521] In some embodiments, the eighth limiting element 1016 includes, but is not limited to, a limiting rod.

[0522] Further, the ratchet drive unit 1000 further includes a reset element 1017. The reset element 1017 is disposed at the proximal end of the sixth control element 1001 and is configured to reset the sixth control element 1001.

[0523] In some embodiments, the reset element 1017 includes, but is not limited to, a reset reed, a reset spring, etc.

[0524] The usage method of this embodiment is as follows:

[0525] Penetrate the cortical bone with the sheath element 101 and drive it into the cancellous bone. At this time, the distal end of the guiding tube element 201 is located inside the distal end of the sheath element 101, and the distal end of the electrode needle element 301 is flush with the distal end of the guiding tube element 201;

[0526] Operate the third linkage element 701 to enable the first linkage element 206 to enter the fourth linkage element 702 through the fifth linkage element 703;

[0527] Push the eighth control element 1009 to engage the first ratchet element 1003 with the fourth rack element 1002, disengage the second ratchet element 1004 from the fourth rack element 1002, engage the third gear element 1005 with the third rack element 311, and disengage the fifth gear element 1007 from the third rack element 311;

[0528] Rotate the sixth control element 1001 in the first direction (e.g., clockwise). Under the cooperation of the fourth rack element 1002 and the first ratchet element 1003, and the cooperation of the first ratchet element 1003 and the second ratchet element 1004, the third gear element 1005 rotates in the first direction. Under the cooperation of the third gear element 1005 and the third rack element 311, the third rack element 311 drives the electrode needle element 301 and the guide tube element 201 to move toward the distal end of the sheath tube element 101;

[0529] When the distal end of the guide tube element 201 is exposed through the opening element 102, stop the fourth control element 801 and operate the third linkage element 701 to separate the first linkage element 206 from the fourth linkage element 702;

[0530] Rotate the sixth control element 1001 in the first direction (e.g., clockwise). Under the cooperation of the fourth rack element 1002 and the first ratchet element 1003, and the cooperation of the first ratchet element 1003 and the second ratchet element 1004, the third gear element 1005 rotates in the first direction. Under the cooperation of the third gear element 1005 and the third rack element 311, the third rack element 311 drives the distal end of the electrode needle element 301 away from the distal end of the guide tube element 201 and reaches the radiofrequency ablation position, then stop the sixth control element 1001;

[0531] Start the power supply. A plurality of electrode plate elements 303 form an electric field to heat and ablate the nerve, thereby completing the radiofrequency ablation operation. Among them, the electric field heating temperature is not higher than 85°C; since the surrounding of the radiofrequency ablation position is all cancellous bone and the heating temperature is not higher than 85°C, it will not cause excessive damage to the surrounding tissues;

[0532] After the radiofrequency ablation operation is completed, rotate the sixth control element 1001 in the second direction (e.g., counterclockwise). Under the cooperation of the fourth rack element 1002 and the second ratchet element 1004, and the cooperation of the third gear element 1005 and the fourth gear element 1006, the fifth gear element 1007 rotates in the second direction. Under the cooperation of the fifth gear element 1007 and the third rack element 311, the third rack element 311 drives the distal end of the electrode needle element 301 close to the guide tube element 201 until the distal end of the electrode needle element 301 is flush with the distal end of the guide tube element 201, then stop the sixth control element 1001;

[0533] Operate the third linkage element 701 to enable the first linkage element 206 to enter the fourth linkage element 702 through the fifth linkage element 703;

[0534] The sixth control element 1001 is pressed in the second direction (such as the counterclockwise direction). With the cooperation of the fourth rack element 1002 and the second ratchet element 1004, and the third gear element 1005 and the fourth gear element 1006, the fifth gear element 1007 rotates in the second direction. With the cooperation of the fifth gear element 1007 and the third rack element 311, the third rack element 311 drives the distal ends of the electrode needle element 301 and the guide tube element 201 to approach the sheath element 101, and enters the inside of the sheath element 101 through the opening element 102, and the sixth control element 1001 is stopped;

[0535] Finally, the sheath element 101 is removed.

[0536] The technical effects of the present invention are as follows: By using the linkage cooperation of the linkage unit with the guide tube unit and the electrode needle unit, the electrode needle unit can move independently, or the guide tube unit and the electrode needle unit can move simultaneously, so as to achieve precise control; By using the ratchet drive cooperation of the ratchet drive unit with the electrode needle unit, the moving speed and moving position of the electrode needle unit can be precisely controlled, which is convenient for precisely controlling the electrode needle unit.

[0537] Embodiment 7

[0538] This embodiment is a variant embodiment of Embodiment 3.

[0539] As Figure 12 shown, the radiofrequency ablation device further includes a handle unit 1100. Among them, the handle unit 1100 is respectively connected to the guide tube unit 200 and the electric drive unit 600, and is used to fix the guide tube unit 200 and the electric drive unit 600.

[0540] As Figure 28 shown, the handle unit 1100 includes a first handle element 1101, a first outlet element 1102, a second handle element 1103 and a second outlet element 1104. Among them, the first outlet element 1102 is arranged at the distal end of the first handle element 1101 and is connected to the guide tube unit 200; the second handle element 1103 is arranged at the side of the first handle element 1101 and is connected to the first handle element 1101; the second outlet element 1104 is arranged at the distal end of the second handle element 1103 and is respectively connected to the first outlet element 1102 and the guide tube unit 200.

[0541] The proximal end of the first handle element 1101 is connected to the third control element 601. Inside the first handle element 1101, there are a guide tube element 201, a first link element 204, a first movable element 205, an electrode needle element 301, a second link element 305, a second movable element 306, and a third movable element 602. The first outlet element 1102 is connected to the sheath element 101. The proximal end of the second handle element 1103 is connected to the third control element 601. Inside the second handle element 1103, there are a guide tube element 201, a first link element 204, a first movable element 205, an electrode needle element 301, a second link element 305, a second movable element 306, and a fourth movable element 603. The second outlet element 1104 is connected to the guide tube element 201.

[0542] In some of these embodiments, the first handle element 1101 includes, but is not limited to, a pistol-style half handle.

[0543] The connection manner between the first outlet element 1102 and the sheath element 101 includes, but is not limited to, snap connection, bonding, etc.

[0544] In some of these embodiments, the first outlet element 1102 includes, but is not limited to, a fixed port.

[0545] The second handle element 1103 is detachably connected to the first handle element 1101, such as by plugging, bolt connection, etc.

[0546] In some of these embodiments, the second handle element 1103 and the first handle element 1101 are designed to be mirror-symmetrical, that is, the shape, length, width, and height of the second handle element 1103 are the same as those of the first handle element 1101.

[0547] In some of these embodiments, the second handle element 1103 includes, but is not limited to, a pistol-style half handle.

[0548] The connection manner between the second outlet element 1104 and the guide tube element 201 includes, but is not limited to, snap connection, bonding, etc.

[0549] In some of these embodiments, the second outlet element 1104 and the first outlet element 1102 are designed to be mirror-symmetrical, that is, the shape, length, width, and height of the second outlet element 1104 are the same as those of the first outlet element 1102.

[0550] In some of these embodiments, the second outlet element 1104 includes, but is not limited to, a fixed port.

[0551] The third sliding element 1113, the third sliding element 1113, the third sliding element 1113, the third sliding element 1113, the third sliding element 1113, the third sliding element 1113, the third sliding element 1113, the third sliding element 1113, the fourth sliding element 1114, the fourth sliding element 1114, the fourth sliding element 1114, the fourth sliding element 1114, the fourth sliding element 1114, the fourth sliding element 1114, the fourth sliding element 1114, the fourth sliding element 1114, the third sliding element 1113, the fourth sliding element 1114, the third sliding element 1113, the fourth sliding element 1114, the third sliding element 1113, the fourth sliding element 1114. Further, the handle unit 1100 further includes a ninth limiting element 1105. The ninth limiting element 1105 is disposed inside the first handle element 1101 and abuts against the proximal end of the guide tube unit 200 for limiting the upper side of the guide tube unit 200.

[0552] Specifically, the ninth limiting element 1105 abuts against the upper side of the first link element 204 for limiting the upper side of the first link element 204.

[0553] The purpose of providing the ninth limiting element 1105 is to limit the displacement of the first link element 204 in the up and down direction, ensuring that the first link element 204 can only move in the front and back directions.

[0554] In some of the embodiments, the ninth limiting element 1105 includes, but is not limited to, a limiting plate.

[0555] Further, the handle unit 1100 further includes a tenth limiting element 1106. The tenth limiting element 1106 is disposed inside the second handle element 1103 and abuts against the proximal end of the electrode needle unit 300 for limiting the upper side of the electrode needle unit 300.

[0556] Specifically, the tenth limiting element 1106 abuts against the upper side of the second link element 305 for limiting the upper side of the second link element 305.

[0557] The purpose of providing the tenth limiting element 1106 is to limit the displacement of the second link element 305 in the up and down direction, ensuring that the second link element 305 can only move in the front and back directions.

[0558] The tenth limiting element 1106 and the ninth limiting element 1105 may be in contact and connected (such as snap-connected), or may not be in contact.

[0559] In some of the embodiments, the tenth limiting element 1106 includes, but is not limited to, a limiting plate.

[0560] Further, the handle unit 1100 further includes an eleventh limiting element 1107. The eleventh limiting element 1107 is disposed inside the first handle element 1101 and abuts against the proximal end of the guide tube unit 200 for limiting the lower side of the guide tube unit 200.

[0561] Specifically, the eleventh limiting element 1107 abuts against the lower side of the first link element 204 for limiting the lower side of the first link element 204.

[0562] The purpose of setting the eleventh limiting element 1107 is to limit the displacement of the first link element 204 in the up and down directions, ensuring that the first link element 204 can only move in the front and back directions.

[0563] In some of the embodiments, the eleventh limiting element 1107 includes, but is not limited to, a limiting plate.

[0564] Further, the handle unit 1100 further includes a twelfth limiting element 1108. The twelfth limiting element 1108 is disposed inside the second handle element 1103 and abuts against the proximal end of the electrode needle unit 300 for limiting the lower side of the electrode needle unit 300.

[0565] Specifically, the twelfth limiting element 1108 abuts against the upper side of the second link element 305 for limiting the lower side of the second link element 305.

[0566] The purpose of setting the twelfth limiting element 1108 is to limit the displacement of the second link element 305 in the up and down directions, ensuring that the second link element 305 can only move in the front and back directions.

[0567] The twelfth limiting element 1108 and the eleventh limiting element 1107 may be in contact and connected (such as snap-connected), or may not be in contact.

[0568] In some of the embodiments, the twelfth limiting element 1108 includes, but is not limited to, a limiting plate.

[0569] Further, the handle unit 1100 further includes an eleventh rotating element 1109. The eleventh rotating element 1109 is disposed on the first handle element 1101 and is connected to the electric drive unit 600.

[0570] Specifically, the eleventh rotating element 1109 is rotatably connected to the first rotating element 604 and abuts against the first limiting element 608.

[0571] The purpose of setting the eleventh rotating element 1109 is to assist the third moving element 602 in rotating.

[0572] In some of these embodiments, the eleventh rotating element 1109 includes, but is not limited to, a rotating base.

[0573] Furthermore, the handle unit 1100 further includes a twelfth rotating element 1110. Among them, the twelfth rotating element 1110 is disposed on the second handle element 1103 and is connected to the electric drive unit 600.

[0574] Specifically, the twelfth rotating element 1110 is rotatably connected to the third rotating element 606 and abuts against the third limiting element 610.

[0575] The purpose of providing the twelfth rotating element 1110 is to assist the fourth movable element 603 in rotating.

[0576] The twelfth rotating element 1110 and the eleventh rotating element 1109 may be in contact and connected (such as snap-connected), or may not be in contact.

[0577] In some of these embodiments, the twelfth rotating element 1110 includes, but is not limited to, a rotating base.

[0578] Furthermore, the handle unit 1100 further includes a thirteenth rotating element 1111. Among them, the thirteenth rotating element 1111 is disposed on the first handle element 1101 and is connected to the electric drive unit 600.

[0579] Specifically, the thirteenth rotating element 1111 is rotatably connected to the second rotating element 605 and abuts against the second limiting element 609.

[0580] The purpose of providing the thirteenth rotating element 1111 is to assist the third movable element 602 in rotating.

[0581] In some of these embodiments, the thirteenth rotating element 1111 includes, but is not limited to, a rotating base.

[0582] Furthermore, the handle unit 1100 further includes a fourteenth rotating element 1112. Among them, the fourteenth rotating element 1112 is disposed on the second handle element 1103 and is connected to the electric drive unit 600.

[0583] Specifically, the fourteenth rotating element 1112 is rotatably connected to the fourth rotating element 607 and abuts against the fourth limiting element 611.

[0584] The purpose of providing the fourteenth rotating element 1112 is to limit and assist the fourth movable element 603 in rotating.

[0585] The fourteenth rotating element 1112 and the thirteenth rotating element 1111 may be in contact and connected (such as snap-connected), or may not be in contact.

[0586] In some of these embodiments, the fourteenth rotating element 1112 includes, but is not limited to, a rotating base.

[0587] The usage method of this embodiment is basically the same as that of Embodiment 3 and will not be elaborated here.

[0588] The technical effects of this embodiment are as follows: By using the handle unit, it is convenient for the operator to operate with one hand, liberating the operator and improving the operation efficiency.

[0589] Embodiment 8

[0590] This embodiment is a variant embodiment of Embodiment 4.

[0591] As Figure 16 shown, the radiofrequency ablation device further includes a handle unit 1100. Among them, the handle unit 1100 is respectively connected to the guide tube unit 200 and the link drive unit 800 for fixing the guide tube unit 200 and the link drive unit 800.

[0592] As Figure 29 shown, the handle unit 1100 includes a first handle element 1101, a first outlet element 1102, a second handle element 1103, and a second outlet element 1104. Among them, the first outlet element 1102 is disposed at the distal end of the first handle element 1101 and is connected to the guide tube unit 200; the second handle element 1103 is disposed at the side of the first handle element 1101 and is connected to the first handle element 1101; the second outlet element 1104 is disposed at the distal end of the second handle element 1103 and is respectively connected to the first outlet element 1102 and the guide tube unit 200.

[0593] Specifically, the proximal end of the first handle element 1101 is connected to the fourth control element 801. Inside the first handle element 1101, there are provided a guide tube element 201, a first linkage element 206, an electrode needle element 301, a second linkage element 307, a third link element 308, a fifth movable element 309, and a sixth movable element 802; the first outlet element 1102 is connected to the sheath element 101; the proximal end of the second handle element 1103 is connected to the fourth control element 801. Inside the second handle element 1103, there are provided a guide tube element 201, a first linkage element 206, an electrode needle element 301, a second linkage element 307, a third link element 308, a fifth movable element 309, and a sixth movable element 802; the second outlet element 1104 is connected to the guide tube element 201.

[0594] In some of these embodiments, the first handle element 1101 includes, but is not limited to, a gun-shaped half handle.

[0595] The connection method between the first outlet element 1102 and the sheath element 101 includes, but is not limited to, snap connection, bonding, etc.

[0596] In some of these embodiments, the first outlet element 1102 includes, but is not limited to, a fixed port.

[0597] The second handle element 1103 is detachably connected to the first handle element 1101, for example, by plugging, bolt connection, etc.

[0598] In some of these embodiments, the second handle element 1103 and the first handle element 1101 are designed to be mirror-symmetrical, that is, the shape, length, width, and height of the second handle element 1103 are the same as those of the first handle element 1101.

[0599] In some of these embodiments, the second handle element 1103 includes, but is not limited to, a gun-shaped half handle.

[0600] The connection manner between the second outlet element 1104 and the guide tube element 201 includes, but is not limited to, snap connection, bonding, etc.

[0601] In some of these embodiments, the second outlet element 1104 and the first outlet element 1102 are designed to be mirror-symmetrical, that is, the shape, length, width, and height of the second outlet element 1104 are the same as those of the first outlet element 1102.

[0602] In some of these embodiments, the second outlet element 1104 includes, but is not limited to, a fixed port.

[0603] Furthermore, the handle unit 1100 further includes a ninth limiting element 1105. Among them, the ninth limiting element 1105 is disposed inside the first handle element 1101 and abuts against the proximal end of the guide tube unit 200, and is used to limit the upper side of the guide tube unit 200.

[0604] Specifically, the ninth limiting element 1105 abuts against the upper side of the first linkage element 206 and is used to limit the upper side of the first linkage element 206.

[0605] The purpose of setting the ninth limiting element 1105 is to limit the displacement of the first linkage element 206 in the up and down directions and ensure that the first linkage element 206 can only move in the front and back directions.

[0606] In some of these embodiments, the ninth limiting element 1105 includes, but is not limited to, a limiting plate.

[0607] Furthermore, the handle unit 1100 further includes a tenth limiting element 1106. Among them, the tenth limiting element 1106 is disposed inside the second handle element 1103 and abuts against the proximal end of the electrode needle unit 300, and is used to limit the upper side of the electrode needle unit 300.

[0608] Specifically, the tenth limiting element 1106 abuts against the upper side of the third link element 308 for limiting the upper side of the third link element 308.

[0609] The purpose of arranging the tenth limiting element 1106 is to limit the displacement of the third link element 308 in the up-and-down direction, ensuring that the third link element 308 can only move in the front-and-back direction.

[0610] The tenth limiting element 1106 and the ninth limiting element 1105 may be in contact and connected (such as snap-connected), or may not be in contact.

[0611] In some of these embodiments, the tenth limiting element 1106 includes, but is not limited to, a limiting plate.

[0612] Furthermore, the handle unit 1100 further includes an eleventh limiting element 1107. Among them, the eleventh limiting element 1107 is arranged inside the first handle element 1101 and abuts against the proximal end of the guide tube unit 200 for limiting the lower side of the guide tube unit 200.

[0613] Specifically, the eleventh limiting element 1107 abuts against the lower side of the first linkage element 206 for limiting the lower side of the first linkage element 206.

[0614] The purpose of arranging the eleventh limiting element 1107 is to limit the displacement of the first linkage element 206 in the up-and-down direction, ensuring that the first linkage element 206 can only move in the front-and-back direction.

[0615] In some of these embodiments, the eleventh limiting element 1107 includes, but is not limited to, a limiting plate.

[0616] Furthermore, the handle unit 1100 further includes a twelfth limiting element 1108. Among them, the twelfth limiting element 1108 is arranged inside the second handle element 1103 and abuts against the proximal end of the electrode needle unit 300 for limiting the lower side of the electrode needle unit 300.

[0617] Specifically, the twelfth limiting element 1108 abuts against the upper side of the third link element 308 for limiting the lower side of the third link element 308.

[0618] The purpose of arranging the twelfth limiting element 1108 is to limit the displacement of the third link element 308 in the up-and-down direction, ensuring that the third link element 308 can only move in the front-and-back direction.

[0619] The twelfth limiting element 1108 and the eleventh limiting element 1107 may be in contact and connected (such as snap-connected), or may not be in contact.

[0620] In some of these embodiments, the twelfth limiting element 1108 includes, but is not limited to, a limiting plate.

[0621] Furthermore, the handle unit 1100 further includes an eleventh rotating element 1109. Among them, the eleventh rotating element 1109 is arranged on the first handle element 1101 and is connected to the link driving unit 800.

[0622] Specifically, the eleventh rotating element 1109 is rotatably connected to the fifth rotating element 803.

[0623] The purpose of arranging the eleventh rotating element 1109 is to assist the fifth rotating element 803 in rotating.

[0624] In some of these embodiments, the eleventh rotating element 1109 includes, but is not limited to, a rotating groove.

[0625] Furthermore, the handle unit 1100 further includes a twelfth rotating element 1110. Among them, the twelfth rotating element 1110 is arranged on the second handle element 1103 and is connected to the link driving unit 800.

[0626] Specifically, the twelfth rotating element 1110 is rotatably connected to the fifth rotating element 803.

[0627] The purpose of arranging the twelfth rotating element 1110 is to assist the fifth rotating element 803 in rotating.

[0628] The twelfth rotating element 1110 and the eleventh rotating element 1109 may be in contact and connected (such as snap-connected), or may not be in contact.

[0629] In some of these embodiments, the twelfth rotating element 1110 includes, but is not limited to, a rotating groove.

[0630] Furthermore, the handle unit 1100 further includes a third sliding element 1113. Among them, the third sliding element 1113 is arranged on the side of the first handle element 1101 and is slidably connected to the linkage unit 700, and is used to make the linkage unit 700 reciprocate in the front-back direction and reciprocate in the left-right direction.

[0631] Specifically, the third sliding element 1113 is slidably connected to the third linkage element 701, and is used to make the third linkage element 701 reciprocate in the front-back direction and reciprocate in the left-right direction.

[0632] The third sliding element 1113 penetrates through the first handle element 1101.

[0633] The size of the third sliding element 1113 matches the size of the third linkage element 701. Generally, the length of the third sliding element 1113 is greater than the width of the third linkage element 701, and the height of the third sliding element 1113 is equal to the height of the third linkage element 701.

[0634] In some of these embodiments, the third sliding element 1113 includes, but is not limited to, a sliding groove.

[0635] Furthermore, the handle unit 1100 further includes a fourth sliding element 1114. Among them, the fourth sliding element 1114 is disposed on the side of the second handle element 1103 and is slidably connected to the linkage unit 700 for reciprocating the linkage unit 700 in the front-rear direction and in the left-right direction.

[0636] Specifically, the fourth sliding element 1114 is slidably connected to the third linkage element 701 for reciprocating the third linkage element 701 in the front-rear direction and in the left-right direction.

[0637] The fourth sliding element 1114 is disposed through the second handle element 1103.

[0638] The size of the fourth sliding element 1114 matches the size of the third linkage element 701. Generally, the length of the fourth sliding element 1114 is greater than the width of the third linkage element 701, and the height of the fourth sliding element 1114 is equal to the height of the third linkage element 701.

[0639] The size of the fourth sliding element 1114 matches the size of the third sliding element 1113. Generally, the length of the fourth sliding element 1114 is equal to the length of the third sliding element 1113, and the height of the fourth sliding element 1114 is equal to the height of the third sliding element 1113.

[0640] In some of these embodiments, the fourth sliding element 1114 includes, but is not limited to, a sliding groove.

[0641] The usage method of this embodiment is basically the same as that of Embodiment 4 and will not be elaborated here.

[0642] The technical effects of this embodiment are as follows: By using the handle unit, it is convenient for the operator to operate with one hand, liberating the operator and improving the operation efficiency.

[0643] Embodiment 9

[0644] This embodiment is a variant embodiment of Embodiment 5.

[0645] As Figure 22As shown, the radiofrequency ablation device further includes a handle unit 1100. The handle unit 1100 is respectively connected to the guiding tube unit 200 and the meshing drive unit 900, and is used to fix the guiding tube unit 200 and the meshing drive unit 900.

[0646] As Figure 30 shown, the handle unit 1100 includes a first handle element 1101, a first outlet element 1102, a second handle element 1103 and a second outlet element 1104. Among them, the first outlet element 1102 is arranged at the distal end of the first handle element 1101 and is connected to the guiding tube unit 200; the second handle element 1103 is arranged at the side of the first handle element 1101 and is connected to the first handle element 1101; the second outlet element 1104 is arranged at the distal end of the second handle element 1103 and is respectively connected to the first outlet element 1102 and the guiding tube unit 200.

[0647] Specifically, the proximal end of the first handle element 1101 is connected to the fifth control element 901. Inside the first handle element 1101, there are arranged a guiding tube element 201, a first linkage element 206, an electrode needle element 301, a second linkage element 307, a first rack element 310, and a sixth movable element 802; the first outlet element 1102 is connected to the sheath element 101; the proximal end of the second handle element 1103 is connected to the fifth control element 901. Inside the second handle element 1103, there are arranged a guiding tube element 201, a first linkage element 206, an electrode needle element 301, a second linkage element 307, a first rack element 310, and a sixth movable element 802; the second outlet element 1104 is connected to the guiding tube element 201.

[0648] In some embodiments thereof, the first handle element 1101 includes but is not limited to a gun-shaped semi-handle.

[0649] The connection manner between the first outlet element 1102 and the sheath element 101 includes but is not limited to snap connection, bonding, etc.

[0650] In some embodiments thereof, the first outlet element 1102 includes but is not limited to a fixed port.

[0651] The second handle element 1103 is detachably connected to the first handle element 1101, for example, by plugging, bolt connection, etc.

[0652] In some embodiments thereof, the second handle element 1103 and the first handle element 1101 are designed to be mirror-symmetrical, that is, the shape, length, width, and height of the second handle element 1103 are the same as those of the first handle element 1101.

[0653] In some of these embodiments, the second handle element 1103 includes, but is not limited to, a pistol grip semi - handle.

[0654] The connection manner between the second outlet element 1104 and the guide tube element 201 includes, but is not limited to, snap - connection, bonding, etc.

[0655] In some of these embodiments, the second outlet element 1104 and the first outlet element 1102 are mirror - symmetrically designed, that is, the shape, length, width, and height of the second outlet element 1104 are the same as those of the first outlet element 1102.

[0656] In some of these embodiments, the second outlet element 1104 includes, but is not limited to, a fixed port.

[0657] Furthermore, the handle unit 1100 further includes a ninth limiting element 1105. Among them, the ninth limiting element 1105 is disposed inside the first handle element 1101 and abuts against the proximal end of the guide tube unit 200, and is used to limit the upper side of the counter - tube unit 200.

[0658] Specifically, the ninth limiting element 1105 abuts against the upper side of the first linkage element 206 and is used to limit the upper side of the first linkage element 206.

[0659] The purpose of setting the ninth limiting element 1105 is to limit the displacement of the first linkage element 206 in the up - and - down direction and ensure that the first linkage element 206 can only move in the front - and - back direction.

[0660] In some of these embodiments, the ninth limiting element 1105 includes, but is not limited to, a limiting plate.

[0661] Furthermore, the handle unit 1100 further includes a tenth limiting element 1106. Among them, the tenth limiting element 1106 is disposed inside the second handle element 1103 and abuts against the proximal end of the electrode needle unit 300, and is used to limit the upper side of the electrode needle unit 300.

[0662] Specifically, the tenth limiting element 1106 abuts against the upper side of the third link element 308 and is used to limit the upper side of the third link element 308.

[0663] The purpose of setting the tenth limiting element 1106 is to limit the displacement of the third link element 308 in the up - and - down direction and ensure that the third link element 308 can only move in the front - and - back direction.

[0664] The tenth limiting element 1106 and the ninth limiting element 1105 may be in contact and connected (such as snap - connection), or may not be in contact.

[0665] In some of these embodiments, the tenth limiting element 1106 includes, but is not limited to, a limiting plate.

[0666] Furthermore, the handle unit 1100 further includes an eleventh limiting element 1107. Wherein, the eleventh limiting element 1107 is disposed inside the first handle element 1101 and abuts against the proximal end of the opposing tube unit 200, for limiting the lower side of the opposing tube unit 200.

[0667] Specifically, the eleventh limiting element 1107 abuts against the lower side of the first linkage element 206, for limiting the lower side of the first linkage element 206.

[0668] The purpose of setting the eleventh limiting element 1107 is to limit the displacement of the first linkage element 206 in the up and down directions, ensuring that the first linkage element 206 can only move in the front and back directions.

[0669] In some of these embodiments, the eleventh limiting element 1107 includes, but is not limited to, a limiting plate.

[0670] Furthermore, the handle unit 1100 further includes a twelfth limiting element 1108. Wherein, the twelfth limiting element 1108 is disposed inside the second handle element 1103 and abuts against the proximal end of the electrode needle unit 300, for limiting the lower side of the electrode needle unit 300.

[0671] Specifically, the twelfth limiting element 1108 abuts against the upper side of the third link element 308, for limiting the lower side of the third link element 308.

[0672] The purpose of setting the twelfth limiting element 1108 is to limit the displacement of the third link element 308 in the up and down directions, ensuring that the third link element 308 can only move in the front and back directions.

[0673] The twelfth limiting element 1108 and the eleventh limiting element 1107 may be in contact and connected (such as snap-connected), or may not be in contact.

[0674] In some of these embodiments, the twelfth limiting element 1108 includes, but is not limited to, a limiting plate.

[0675] Furthermore, the handle unit 1100 further includes an eleventh rotating element 1109. Wherein, the eleventh rotating element 1109 is disposed on the first handle element 1101 and is connected to the meshing drive unit 900.

[0676] Specifically, the eleventh rotating element 1109 is rotatably connected to the sixth rotating element 905.

[0677] The eleventh rotating element 1109 and the sixth rotating element 905 can be detachably connected or fixedly connected. For example, plug connection, integral molding, etc.

[0678] The size of the eleventh rotating element 1109 matches the size of the sixth rotating element 905. Generally, the radial dimension of the eleventh rotating element 1109 is equal to the radial dimension of the sixth rotating element 905.

[0679] In some of these embodiments, the eleventh rotating element 1109 includes, but is not limited to, a rotating groove.

[0680] Furthermore, the handle unit 1100 further includes a twelfth rotating element 1110. Among them, the twelfth rotating element 1110 is disposed on the second handle element 1103 and is connected to the meshing drive unit 900.

[0681] Specifically, the twelfth rotating element 1110 is rotatably connected to the sixth rotating element 905.

[0682] The twelfth rotating element 1110 and the sixth rotating element 905 can be detachably connected or fixedly connected. For example, plug connection, integral molding, etc.

[0683] The size of the twelfth rotating element 1110 matches the size of the sixth rotating element 905. Generally, the radial dimension of the twelfth rotating element 1110 is equal to the radial dimension of the sixth rotating element 905.

[0684] In some of these embodiments, the twelfth rotating element 1110 includes, but is not limited to, a rotating groove.

[0685] Furthermore, the handle unit 1100 further includes a third sliding element 1113. Among them, the third sliding element 1113 is disposed on the side of the first handle element 1101 and is slidably connected to the linkage unit 700, and is used to make the linkage unit 700 reciprocate in the front - rear direction and reciprocate in the left - right direction.

[0686] Specifically, the third sliding element 1113 is slidably connected to the third linkage element 701, and is used to make the third linkage element 701 reciprocate in the front - rear direction and reciprocate in the left - right direction.

[0687] The third sliding element 1113 penetrates through the first handle element 1101.

[0688] The size of the third sliding element 1113 matches the size of the third linkage element 701. Generally, the length of the third sliding element 1113 is greater than the width of the third linkage element 701, and the height of the third sliding element 1113 is equal to the height of the third linkage element 701.

[0689] In some of these embodiments, the third sliding element 1113 includes, but is not limited to, a sliding groove.

[0690] Further, the handle unit 1100 further includes a fourth sliding element 1114. Wherein, the fourth sliding element 1114 is disposed on the side of the second handle element 1103 and is slidably connected to the linkage unit 700 for reciprocating the linkage unit 700 in the front - rear direction and in the left - right direction.

[0691] Specifically, the fourth sliding element 1114 is slidably connected to the third linkage element 701 for reciprocating the third linkage element 701 in the front - rear direction and in the left - right direction.

[0692] The fourth sliding element 1114 is disposed through the second handle element 1103.

[0693] The size of the fourth sliding element 1114 matches the size of the third linkage element 701. Generally, the length of the fourth sliding element 1114 is greater than the width of the third linkage element 701, and the height of the fourth sliding element 1114 is equal to the height of the third linkage element 701.

[0694] The size of the fourth sliding element 1114 matches the size of the third sliding element 1113. Generally, the length of the fourth sliding element 1114 is equal to the length of the third sliding element 1113, and the height of the fourth sliding element 1114 is equal to the height of the third sliding element 1113.

[0695] In some of these embodiments, the fourth sliding element 1114 includes, but is not limited to, a sliding groove.

[0696] Further, the handle unit 1100 further includes a fifteenth rotating element 1115. Wherein, the fifteenth rotating element 1115 is disposed on the first handle element 1101 and is connected to the meshing drive unit 900.

[0697] Specifically, the fifteenth rotating element 1115 is connected to the seventh rotating element 906.

[0698] The fifteenth rotating element 1115 and the seventh rotating element 906 can be detachably connected or fixedly connected. For example, plug - in connection, integral molding, etc.

[0699] The size of the fifteenth rotating element 1115 matches the size of the seventh rotating element 906. Generally, the radial dimension of the fifteenth rotating element 1115 is equal to the radial dimension of the seventh rotating element 906.

[0700] In some of these embodiments, the fifteenth rotating element 1115 includes, but is not limited to, a rotating groove.

[0701] Further, the handle unit 1100 further includes a sixteenth rotating element 1116. The sixteenth rotating element 1116 is disposed on the second handle element 1103 and is connected to the meshing drive unit 900.

[0702] Specifically, the sixteenth rotating element 1116 is connected to the seventh rotating element 906.

[0703] The sixteenth rotating element 1116 and the seventh rotating element 906 can be detachably connected or fixedly connected. For example, plugging, integral molding, etc.

[0704] The size of the sixteenth rotating element 1116 matches the size of the seventh rotating element 906. Generally, the radial dimension of the sixteenth rotating element 1116 is equal to the radial dimension of the seventh rotating element 906.

[0705] In some of these embodiments, the sixteenth rotating element 1116 includes, but is not limited to, a rotating groove.

[0706] The usage method of this embodiment is basically the same as that of Embodiment 5 and will not be elaborated here.

[0707] The technical effects of this embodiment are as follows: Using the handle unit facilitates the operator to operate with one hand, liberates the operator, and improves the operation efficiency.

[0708] Embodiment 10

[0709] This embodiment is a variant embodiment of Embodiment 6.

[0710] As Figure 25 shown, the radiofrequency ablation device further includes a handle unit 1100. The handle unit 1100 is respectively connected to the guide tube unit 200 and the ratchet drive unit 1000 for fixing the guide tube unit 200 and the ratchet drive unit 1000.

[0711] As Figure 31 shown, the handle unit 1100 includes a first handle element 1101, a first outlet element 1102, a second handle element 1103, and a second outlet element 1104. The first outlet element 1102 is disposed at the distal end of the first handle element 1101 and is connected to the guide tube unit 200; the second handle element 1103 is disposed at the side of the first handle element 1101 and is connected to the first handle element 1101; the second outlet element 1104 is disposed at the distal end of the second handle element 1103 and is respectively connected to the first outlet element 1102 and the guide tube unit 200.

[0712] Specifically, the proximal end of the first handle element 1101 is connected to the sixth control element 1001, the side portion of the first handle element 1101 is slidably connected to the seventh control element 1008, and a guiding tube element 201, a first linkage element 206, an electrode needle element 301, a second linkage element 307, a third rack element 311, a fourth rack element 1002, a first ratchet element 1003, a second ratchet element 1004, a third gear element 1005, a fourth gear element 1006, and a fifth gear element 1007 are arranged inside the first handle element 1101; the first outlet element 1102 is connected to the sheath element 101; the proximal end of the second handle element 1103 is connected to the sixth control element 1001, the proximal end of the second handle element 1103 is connected to the sixth control element 1001, the side portion of the second handle element 1103 is slidably connected to the eighth control element 1009, and a guiding tube element 201, a first linkage element 206, an electrode needle element 301, a second linkage element 307, a third rack element 311, a fourth rack element 1002, a first ratchet element 1003, a second ratchet element 1004, a third gear element 1005, a fourth gear element 1006, and a fifth gear element 1007 are arranged inside the second handle element 1103; the second outlet element 1104 is connected to the guiding tube element 201.

[0713] In some of these embodiments, the first handle element 1101 includes, but is not limited to, a gun-shaped half handle.

[0714] The connection manner between the first outlet element 1102 and the sheath element 101 includes, but is not limited to, snap connection, bonding, etc.

[0715] In some of these embodiments, the first outlet element 1102 includes, but is not limited to, a fixed port.

[0716] The second handle element 1103 is detachably connected to the first handle element 1101, for example, by plugging, bolt connection, etc.

[0717] In some of these embodiments, the second handle element 1103 and the first handle element 1101 are designed to be mirror-symmetrical, that is, the shape, length, width, and height of the second handle element 1103 are the same as those of the first handle element 1101.

[0718] In some of these embodiments, the second handle element 1103 includes, but is not limited to, a gun-shaped half handle.

[0719] The connection manner between the second outlet element 1104 and the guiding tube element 201 includes, but is not limited to, snap connection, bonding, etc.

[0720] In some of these embodiments, the second outlet element 1104 and the first outlet element 1102 are mirror-symmetrically designed, that is, the shape, length, width, and height of the second outlet element 1104 are the same as those of the first outlet element 1102.

[0721] In some of these embodiments, the second outlet element 1104 includes, but is not limited to, a fixed port.

[0722] Furthermore, the handle unit 1100 further includes a ninth limiting element 1105. Among them, the ninth limiting element 1105 is disposed inside the first handle element 1101 and abuts against the proximal end of the guide tube unit 200 for limiting the upper side of the guide tube unit 200.

[0723] Specifically, the ninth limiting element 1105 abuts against the upper side of the first linkage element 206 for limiting the upper side of the first linkage element 206.

[0724] The purpose of setting the ninth limiting element 1105 is to limit the displacement of the first linkage element 206 in the up and down directions, ensuring that the first linkage element 206 can only move in the front and back directions.

[0725] In some of these embodiments, the ninth limiting element 1105 includes, but is not limited to, a limiting plate.

[0726] Furthermore, the handle unit 1100 further includes a tenth limiting element 1106. Among them, the tenth limiting element 1106 is disposed inside the second handle element 1103 and abuts against the proximal end of the electrode needle unit 300 for limiting the upper side of the electrode needle unit 300.

[0727] Specifically, the tenth limiting element 1106 abuts against the upper side of the third link element 308 for limiting the upper side of the third link element 308.

[0728] The purpose of setting the tenth limiting element 1106 is to limit the displacement of the third link element 308 in the up and down directions, ensuring that the third link element 308 can only move in the front and back directions.

[0729] The tenth limiting element 1106 and the ninth limiting element 1105 may be in contact and connected (such as snap-connected), or may not be in contact.

[0730] In some of these embodiments, the tenth limiting element 1106 includes, but is not limited to, a limiting plate.

[0731] Furthermore, the handle unit 1100 further includes an eleventh limiting element 1107. The eleventh limiting element 1107 is disposed inside the first handle element 1101 and abuts against the proximal end of the guide tube unit 200 for limiting the lower side of the guide tube unit 200.

[0732] Specifically, the eleventh limiting element 1107 abuts against the lower side of the first linkage element 206 for limiting the lower side of the first linkage element 206.

[0733] The purpose of providing the eleventh limiting element 1107 is to limit the displacement of the first linkage element 206 in the up and down directions, ensuring that the first linkage element 206 can only move in the front and back directions.

[0734] In some embodiments thereof, the eleventh limiting element 1107 includes, but is not limited to, a limiting plate.

[0735] Furthermore, the handle unit 1100 further includes a twelfth limiting element 1108. The twelfth limiting element 1108 is disposed inside the second handle element 1103 and abuts against the proximal end of the electrode needle unit 300 for limiting the lower side of the electrode needle unit 300.

[0736] Specifically, the twelfth limiting element 1108 abuts against the upper side of the third link element 308 for limiting the lower side of the third link element 308.

[0737] The purpose of providing the twelfth limiting element 1108 is to limit the displacement of the third link element 308 in the up and down directions, ensuring that the third link element 308 can only move in the front and back directions.

[0738] The twelfth limiting element 1108 and the eleventh limiting element 1107 may be in contact and connected (such as snap-connected), or may not be in contact.

[0739] In some embodiments thereof, the twelfth limiting element 1108 includes, but is not limited to, a limiting plate.

[0740] Furthermore, the handle unit 1100 further includes an eleventh rotating element 1109. The eleventh rotating element 1109 is disposed on the first handle element 1101 and is connected to the ratchet driving unit 1000.

[0741] Specifically, the eleventh rotating element 1109 is rotatably connected to the eighth rotating element 1010.

[0742] The eleventh rotating element 1109 and the eighth rotating element 1010 may be detachably connected or fixedly connected. For example, plug-in connection, integral molding, etc.

[0743] The size of the eleventh rotating element 1109 matches the size of the eighth rotating element 1010. Generally, the radial size of the eleventh rotating element 1109 is equal to the radial size of the eighth rotating element 1010.

[0744] In some of these embodiments, the eleventh rotating element 1109 includes, but is not limited to, a rotating groove.

[0745] Furthermore, the handle unit 1100 further includes a twelfth rotating element 1110. Among them, the twelfth rotating element 1110 is disposed on the second handle element 1103 and is connected to the ratchet driving unit 1000.

[0746] Specifically, the twelfth rotating element 1110 is rotationally connected to the eighth rotating element 1010.

[0747] The twelfth rotating element 1110 and the eighth rotating element 1010 can be detachably connected or fixedly connected. For example, plugging, integrally molding, etc.

[0748] The size of the twelfth rotating element 1110 matches the size of the eighth rotating element 1010. Generally, the radial size of the twelfth rotating element 1110 is equal to the radial size of the eighth rotating element 1010.

[0749] In some of these embodiments, the twelfth rotating element 1110 includes, but is not limited to, a rotating groove.

[0750] Furthermore, the handle unit 1100 further includes a thirteenth rotating element 1111. Among them, the thirteenth rotating element 1111 is disposed on the first handle element 1101 and is connected to the ratchet driving unit 1000.

[0751] Specifically, the thirteenth rotating element 1111 is connected to the ninth rotating element 1011.

[0752] The thirteenth rotating element 1111 and the ninth rotating element 1011 can be detachably connected or fixedly connected. For example, plugging, integrally molding, etc.

[0753] The size of the thirteenth rotating element 1111 matches the size of the ninth rotating element 1011. Generally, the radial size of the thirteenth rotating element 1111 is equal to the radial size of the ninth rotating element 1011.

[0754] In some of these embodiments, the thirteenth rotating element 1111 includes, but is not limited to, a rotating groove.

[0755] Furthermore, the handle unit 1100 further includes a fourteenth rotating element 1112. Among them, the fourteenth rotating element 1112 is disposed on the second handle element 1103 and is connected to the ratchet driving unit 1000.

[0756] Specifically, the fourteenth rotating element 1112 is connected to the ninth rotating element 1011.

[0757] The fourteenth rotating element 1112 and the ninth rotating element 1011 can be detachably connected or fixedly connected. For example, plugging, integrally molding, etc.

[0758] The size of the fourteenth rotating element 1112 matches the size of the ninth rotating element 1011. Generally, the radial dimension of the fourteenth rotating element 1112 is equal to the radial dimension of the ninth rotating element 1011.

[0759] In some of these embodiments, the fourteenth rotating element 1112 includes, but is not limited to, a rotating groove.

[0760] Furthermore, the handle unit 1100 further includes a third sliding element 1113. Among them, the third sliding element 1113 is disposed on the side of the first handle element 1101 and is slidably connected to the linkage unit 700, and is used to make the linkage unit 700 reciprocate in the front - rear direction and reciprocate in the left - right direction.

[0761] Specifically, the third sliding element 1113 is slidably connected to the third linkage element 701, and is used to make the third linkage element 701 reciprocate in the front - rear direction and reciprocate in the left - right direction.

[0762] The third sliding element 1113 is disposed through the first handle element 1101.

[0763] The size of the third sliding element 1113 matches the size of the third linkage element 701. Generally, the length of the third sliding element 1113 is greater than the width of the third linkage element 701, and the height of the third sliding element 1113 is equal to the height of the third linkage element 701.

[0764] In some of these embodiments, the third sliding element 1113 includes, but is not limited to, a sliding groove.

[0765] Furthermore, the handle unit 1100 further includes a fourth sliding element 1114. Among them, the fourth sliding element 1114 is disposed on the side of the second handle element 1103 and is slidably connected to the linkage unit 700, and is used to make the linkage unit 700 reciprocate in the front - rear direction and reciprocate in the left - right direction.

[0766] Specifically, the fourth sliding element 1114 is slidably connected to the third linkage element 701, and is used to make the third linkage element 701 reciprocate in the front - rear direction and reciprocate in the left - right direction.

[0767] The fourth sliding element 1114 is disposed through the second handle element 1103.

[0768] The size of the fourth sliding element 1114 matches the size of the third linkage element 701. Generally, the length of the fourth sliding element 1114 is greater than the width of the third linkage element 701, and the height of the fourth sliding element 1114 is equal to the height of the third linkage element 701.

[0769] The size of the fourth sliding element 1114 matches the size of the third sliding element 1113. Generally, the length of the fourth sliding element 1114 is equal to the length of the third sliding element 1113, and the height of the fourth sliding element 1114 is equal to the height of the third sliding element 1113.

[0770] In some of these embodiments, the fourth sliding element 1114 includes, but is not limited to, a sliding groove.

[0771] Furthermore, the handle unit 1100 further includes a fifteenth rotating element 1115. Among them, the fifteenth rotating element 1115 is disposed on the first handle element 1101 and is connected to the ratchet driving unit 1000.

[0772] Specifically, the fifteenth rotating element 1115 is rotatably connected to the tenth rotating element 1012.

[0773] The fifteenth rotating element 1115 and the tenth rotating element 1012 can be detachably connected or fixedly connected. For example, plugging, integrally forming, etc.

[0774] The size of the fifteenth rotating element 1115 matches the size of the tenth rotating element 1012. Generally, the radial dimension of the fifteenth rotating element 1115 is equal to the radial dimension of the tenth rotating element 1012.

[0775] In some of these embodiments, the fifteenth rotating element 1115 includes, but is not limited to, a rotating groove.

[0776] Furthermore, the handle unit 1100 further includes a sixteenth rotating element 1116. Among them, the sixteenth rotating element 1116 is disposed on the second handle element 1103 and is connected to the ratchet driving unit 1000.

[0777] Specifically, the sixteenth rotating element 1116 is rotatably connected to the tenth rotating element 1012.

[0778] The sixteenth rotating element 1116 and the tenth rotating element 1012 can be detachably connected or fixedly connected. For example, plugging, integrally forming, etc.

[0779] The size of the sixteenth rotating element 1116 matches the size of the tenth rotating element 1012. Generally, the radial dimension of the sixteenth rotating element 1116 is equal to the radial dimension of the tenth rotating element 1012.

[0780] In some of these embodiments, the sixteenth rotating element 1116 includes, but is not limited to, a rotating groove.

[0781] Furthermore, the handle unit 1100 further includes at least one thirteenth limiting element 1117. Among them, the thirteenth limiting element 1117 is disposed on the side of the first handle element 1101 and is in limiting connection with the ratchet driving unit 1000 for limiting the first side of the ratchet driving unit 1000.

[0782] Specifically, the thirteenth limiting element 1117 is slidably connected to the fifth limiting element 1013.

[0783] The thirteenth limiting element 1117 is disposed through the first handle element 1101.

[0784] The number of the thirteenth limiting elements 1117 matches the number of the fifth limiting elements 1013. Generally, the number of the thirteenth limiting elements 1117 is equal to the number of the fifth limiting elements 1013.

[0785] In the case where there are several thirteenth limiting elements 1117, the several thirteenth limiting elements 1117 are spaced apart along the length direction and / or the height direction of the first handle element 1101.

[0786] The size of the thirteenth limiting element 1117 matches the size of the fifth limiting element 1013. Generally, the radial dimension of the thirteenth limiting element 1117 is equal to the radial dimension of the fifth limiting element 1013.

[0787] In some of these embodiments, the thirteenth limiting element 1117 includes, but is not limited to, a limiting hole.

[0788] Furthermore, the handle unit 1100 further includes at least one fourteenth limiting element 1118. Among them, the fourteenth limiting element 1118 is disposed on the side of the first handle element 1101 and is in limiting connection with the ratchet driving unit 1000 for limiting the first side of the ratchet driving unit 1000.

[0789] Specifically, the fourteenth limiting element 1118 is slidably connected to the sixth limiting element 1014.

[0790] The fourteenth limiting element 1118 is disposed through the first handle element 1101.

[0791] The number of the fourteenth limiting elements 1118 matches the number of the sixth limiting elements 1014. Generally, the number of the fourteenth limiting elements 1118 is equal to the number of the sixth limiting elements 1014.

[0792] When there are a plurality of fourteenth limiting elements 1118, the plurality of fourteenth limiting elements 1118 are arranged at intervals along the length direction and / or the height direction of the first handle element 1101.

[0793] The size of the fourteenth limiting element 1118 matches the size of the sixth limiting element 1014. Generally, the radial size of the fourteenth limiting element 1118 is equal to the radial size of the sixth limiting element 1014.

[0794] In some of these embodiments, the fourteenth limiting element 1118 includes, but is not limited to, a limiting hole.

[0795] Furthermore, the handle unit 1100 further includes at least one fifteenth limiting element 1119. Among them, the fifteenth limiting element 1119 is disposed on the side of the second handle element 1103 and is in limiting connection with the ratchet driving unit 1000 for limiting the second side of the ratchet driving unit 1000.

[0796] Specifically, the fifteenth limiting element 1119 is slidably connected to the seventh limiting element 1015.

[0797] The fifteenth limiting element 1119 penetrates through the second handle element 1103.

[0798] The number of the fifteenth limiting elements 1119 matches the number of the seventh limiting elements 1015. Generally, the number of the fifteenth limiting elements 1119 is equal to the number of the seventh limiting elements 1015.

[0799] When there are a plurality of fifteenth limiting elements 1119, the plurality of fifteenth limiting elements 1119 are arranged at intervals along the length direction and / or the height direction of the second handle element 1103.

[0800] The size of the fifteenth limiting element 1119 matches the size of the seventh limiting element 1015. Generally, the radial size of the fifteenth limiting element 1119 is equal to the radial size of the seventh limiting element 1015.

[0801] In some of these embodiments, the fifteenth limiting element 1119 includes, but is not limited to, a limiting hole.

[0802] Furthermore, the handle unit 1100 further includes at least one sixteenth limiting element 1120. Among them, the sixteenth limiting element 1120 is disposed on the side of the second handle element 1103 and is in limiting connection with the ratchet driving unit 1000 for limiting the second side of the ratchet driving unit 1000.

[0803] Specifically, the sixteenth limiting element 1120 is slidably connected to the eighth limiting element 1016.

[0804] The sixteenth limiting element 1120 penetrates through the second handle element 1103.

[0805] The quantity of the sixteenth limiting element 1120 matches the quantity of the eighth limiting element 1016. Generally, the quantity of the sixteenth limiting element 1120 is equal to the quantity of the eighth limiting element 1016.

[0806] When there are a plurality of the sixteenth limiting elements 1120, the plurality of sixteenth limiting elements 1120 are arranged at intervals along the length direction and / or the height direction of the second handle element 1103.

[0807] The size of the sixteenth limiting element 1120 matches the size of the eighth limiting element 1016. Generally, the radial size of the sixteenth limiting element 1120 is equal to the radial size of the eighth limiting element 1016.

[0808] In some of these embodiments, the sixteenth limiting element 1120 includes, but is not limited to, a limiting hole.

[0809] The usage method of this embodiment is basically the same as that of Embodiment 6, and will not be elaborated here.

[0810] The technical effects of this embodiment are as follows: By using the handle unit, it is convenient for the operator to operate with one hand, liberating the operator and improving the operation efficiency.

[0811] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be realized that all equivalent replacements and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A radiofrequency ablation device, characterized in that, Comprising: A sheath tube unit, an end or side portion of the distal end of the sheath tube unit being provided with an opening element; A guiding tube unit, the guiding tube unit being movably disposed inside the sheath tube unit for reciprocating movement along the axial direction of the sheath tube unit so that the distal end of the guiding tube unit is exposed through the opening element of the sheath tube unit; An electrode needle unit, the electrode needle unit being movably disposed inside the guiding tube unit for reciprocating movement along the axial direction of the guiding tube unit; Wherein, the distal end of the guiding tube unit is exposed through the opening element of the sheath tube unit, the distal end of the electrode needle unit reaches the radiofrequency ablation position away from the distal end of the guiding tube unit, and the electrode needle unit performs radiofrequency ablation operation.

2. The radiofrequency ablation device according to claim 1, wherein The sheath tube unit comprises: A sheath tube element, the guiding tube unit being movably disposed inside the sheath tube element; An opening element, the opening element being disposed at an end or side portion of the distal end of the sheath tube element for the distal end of the guiding tube unit to pass through; and / or The guiding tube unit comprises: A guiding tube element, the distal end of the guiding tube element being a flexible structure, the guiding tube element being movably disposed inside the sheath tube unit, the electrode needle unit being movably disposed inside the guiding tube element for reciprocating movement along the axial direction of the sheath tube unit so that the distal end of the guiding tube element is exposed through the opening element of the sheath tube unit; and / or The electrode needle unit comprises: An electrode needle element, the electrode needle element being a flexible structure, the electrode needle element being movably disposed inside the guiding tube unit for reciprocating movement along the axial direction of the guiding tube unit; A plurality of groove elements, the plurality of groove elements being distributed on the distal end of the electrode needle element, the groove elements being annular; A plurality of electrode sheet elements, the plurality of electrode sheet elements being respectively disposed on the corresponding groove elements, the electrode sheet elements being annular.

3. The radiofrequency ablation device according to any one of claims 1 to 2, characterized in that Further comprising: A first screw driving unit, the first screw driving unit being connected to the proximal end of the guiding tube unit for driving the guiding tube unit to reciprocate along the axial direction of the sheath tube unit; A second screw driving unit, the second screw driving unit being connected to the proximal end of the electrode needle unit for driving the electrode needle unit to reciprocate along the axial direction of the guiding tube unit; or An electric driving unit, the electric driving unit being respectively connected to the guiding tube unit and the electrode needle unit for respectively driving the guiding tube unit to reciprocate along the axial direction of the sheath tube unit and the electrode needle unit to reciprocate along the axial direction of the guiding tube unit; Or A linkage unit, the linkage unit being detachably connected to the guiding tube unit and connected to the electrode needle unit for causing the guiding tube unit and the electrode needle unit to move simultaneously when connected to the guiding tube unit or causing the electrode needle unit to move alone when separated from the guiding tube unit; A connecting rod driving unit, the connecting rod driving unit being connected to the proximal end of the electrode needle unit for driving the electrode needle unit to reciprocate along the axial direction of the guiding tube unit; Or A linkage unit, which is detachably connected to the guide tube unit, is connected to the electrode needle unit, and is configured to move the guide tube unit and the electrode needle unit simultaneously when connected to the guide tube unit or move the electrode needle unit alone when separated from the guide tube unit; An engagement drive unit, which is connected to the proximal end of the electrode needle unit, is configured to drive the electrode needle unit to reciprocate axially along the guide tube unit; Or A linkage unit, which is detachably connected to the guide tube unit, is connected to the electrode needle unit, and is configured to move the guide tube unit and the electrode needle unit simultaneously when connected to the guide tube unit or move the electrode needle unit alone when separated from the guide tube unit; A ratchet drive unit, which is connected to the proximal end of the electrode needle unit, is configured to drive the electrode needle unit to reciprocate axially along the guide tube unit.

4. The radiofrequency ablation device according to claim 3, characterized in that, The sheath tube unit further includes: At least one first sliding element, which is disposed at the proximal end of the sheath tube unit and penetrates through the side portion of the sheath tube unit; and / or The guide tube unit further includes: At least one second sliding element, which is disposed at the proximal end of the guide tube unit and penetrates through the side portion of the guide tube unit; and / or The guide tube unit further includes: A first threaded element, which is disposed at the proximal end of the guide tube unit and is helically connected to the first screw drive unit, and is configured to drive the guide tube unit to reciprocate axially along the sheath tube unit under the action of the first screw drive unit; and / or The guide tube unit further includes: A first link element, which is disposed at the proximal end of the guide tube unit, and the distal end of the first link element is connected to the distal end of the guide tube unit, and is configured to drive the guide tube unit to reciprocate axially along the sheath tube unit; A first movable element, which is disposed at the proximal end of the first link element and is movably connected to the electric drive unit, and is configured to drive the first link element to reciprocate axially along the sheath tube unit under the action of the electric drive unit; and / or The guide tube unit further includes: A first linkage element, which is disposed at the proximal end of the guide tube unit and is detachably connected to the linkage unit, and is configured to drive the guide tube unit to reciprocate axially along the sheath tube unit when connected to the linkage unit; and / or The electrode needle unit further includes: A second threaded element, which is disposed at the proximal end of the electrode needle unit and is helically connected to the second screw drive unit, and is configured to drive the electrode needle unit to reciprocate axially along the guide tube unit under the action of the second screw drive unit; and / or The electrode needle unit further includes: A second link element, which is arranged at the proximal end of the electrode needle unit. The distal end of the second link element is connected to the proximal end of the electrode needle unit and is used to drive the electrode needle unit to reciprocate axially along the guide tube unit; A second movable element, which is arranged at the proximal end of the second link element and is movably connected to the electric drive unit, and is used to drive the second link element to reciprocate axially along the guide tube unit under the action of the electric drive unit; and / or The electrode needle unit further includes: A second linkage element, which is arranged at the proximal end of the electrode needle unit and is connected to the linkage unit, and is used to drive the linkage unit to reciprocate; A third link element, which is arranged at the proximal end of the electrode needle unit. The distal end of the third link element is connected to the proximal end of the electrode needle unit and is used to drive the electrode needle unit to reciprocate axially along the guide tube unit; A fifth movable element, which is arranged at the proximal end of the third link element and is movably connected to the link drive unit, and is used to drive the third link element to reciprocate axially along the guide tube unit under the action of the link drive unit; and / or The electrode needle unit further includes: A second linkage element, which is arranged at the proximal end of the electrode needle unit and is connected to the linkage unit, and is used to drive the linkage unit to reciprocate; A first rack element, which is arranged at the proximal end of the electrode needle unit. The distal end of the first rack element is connected to the proximal end of the electrode needle unit and meshes with the meshing drive unit, and is used to drive the electrode needle unit to reciprocate axially along the guide tube unit under the action of the meshing drive unit; and / or The electrode needle unit further includes: A second linkage element, which is arranged at the proximal end of the electrode needle unit and is connected to the linkage unit, and is used to drive the linkage unit to reciprocate; A third rack element, which is arranged at the proximal end of the electrode needle unit. The distal end of the third rack element is connected to the proximal end of the electrode needle unit and meshes with the ratchet drive unit, and is used to drive the electrode needle unit to reciprocate axially along the guide tube unit under the action of the ratchet drive unit.

5. The radiofrequency ablation device according to claim 3, characterized in that, The first screw drive unit includes: A first control element, which is movably arranged at the proximal end of the guide tube unit; A third threaded element, which is arranged at the distal end of the first control element and is helically connected to the proximal end of the guide tube unit, and is used to drive the guide tube element to reciprocate axially along the sheath tube unit under the action of the first control element; and / or The second screw drive unit includes: A second control element, which is movably arranged at the proximal end of the electrode needle unit; A fourth threaded element, which is arranged at the distal end of the second control element and is helically connected to the proximal end of the electrode needle unit, for driving the electrode needle unit to reciprocate axially along the guiding tube unit under the action of the second control element; and / or The electric drive unit includes: A third control element, which is arranged at the proximal end of the electrode needle unit; A third moving element, which is arranged at the output end of the third control element and is movably connected to the guiding tube unit, for driving the guiding tube unit to reciprocate axially along the sheath tube unit under the action of the third control element; A fourth moving element, which is arranged at the output end of the third control element and is movably connected to the electrode needle unit, for driving the electrode needle unit to reciprocate axially along the guiding tube unit under the action of the third control element; and / or The linkage unit includes: A third linkage element, which is movably arranged at the side of the guiding tube unit and the side of the electrode needle unit; A fourth linkage element, which is arranged at the side of the third linkage element and is detachably connected to the guiding tube unit and is connected to the electrode needle unit, for driving the third linkage element to reciprocate under the action of the electrode needle unit; A fifth linkage element, which is arranged at the side of the third linkage element and is communicated with the fourth linkage element, for allowing the guiding tube unit to enter or leave the fourth linkage element; and / or The link drive unit includes: A fourth control element, which is movably arranged at the proximal end of the electrode needle unit; A sixth moving element, which is arranged at the end of the fourth control element and is movably connected to the electrode needle unit, for driving the electrode needle unit to reciprocate axially along the guiding tube unit under the action of the fourth control element; and / or The meshing drive unit includes: A fifth control element, which is movably arranged at the proximal end of the electrode needle unit; A second rack element, which is arranged at the end of the fifth control element, for reciprocating under the action of the fifth control element; A first gear element, which is movably arranged at the end of the fifth control element and meshes with the second rack element, for reciprocally rotating under the action of the second rack element; A second gear element, which is coaxially arranged with the first gear element and meshes with the electrode needle unit, for driving the electrode needle unit to reciprocate axially along the guiding tube unit under the action of the first gear element; and / or The ratchet drive unit includes: A sixth control element, which is movably arranged at the proximal end of the electrode needle unit; A fourth rack element, which is arranged at the end of the sixth control element, for reciprocating under the action of the sixth control element; A first ratchet element, which is movably arranged at the end of the sixth control element and is removably engaged with the fourth rack element for reciprocating rotation under the action of the fourth rack element; A second ratchet element, which is coaxially arranged with the first ratchet element, cooperates with the first ratchet element, and is removably engaged with the fourth rack element for rotating in a first direction under the action of the first ratchet element or rotating in a second direction under the action of the fourth rack element; A third gear element, which is coaxially arranged with the second ratchet element and is removably engaged with the electrode needle unit for driving the electrode needle unit to move unidirectionally along the axial direction of the guide tube unit under the action of the second ratchet element; A fourth gear element, which is engaged with the third gear element for rotating under the action of the third gear element; A fifth gear element, which is coaxially arranged with the fourth gear element and is removably engaged with the electrode needle unit for driving the electrode needle unit to move unidirectionally along the axial direction of the guide tube unit under the action of the fourth gear element; A seventh control element, which is movably arranged on the first side of the ratchet driving unit and is respectively in contact with the first side of the third gear element and the first side of the fifth gear element for moving along the axial direction of the third gear element to separate the third gear element from the electrode needle unit and moving along the axial direction of the fifth gear element to engage the fifth gear element with the electrode needle unit; An eighth control element, which is movably arranged on the second side of the ratchet driving unit and is respectively in contact with the second side of the third gear element and the second side of the fifth gear element for moving along the axial direction of the third gear element to engage the third gear element with the electrode needle unit and moving along the axial direction of the fifth gear element to separate the fifth gear element from the electrode needle unit.

6. The radiofrequency ablation device according to claim 5, wherein, The first screw driving unit further includes: A gripping element, which is arranged at the proximal end of the sheath tube unit, the distal end of the gripping element is connected to the proximal end of the sheath tube unit, and the distal end of the gripping element is rotatably connected to the first control element; and / or The electric driving unit further includes: A first rotating element, which is arranged at the distal end of the third movable element for rotating under the action of the third movable element; and / or The electric driving unit further includes: A second rotating element, which is arranged at the proximal end of the third movable element for rotating under the action of the third movable element; and / or The electric driving unit further includes: A third rotating element, which is arranged at the distal end of the fourth movable element for rotating under the action of the fourth movable element; and / or The electric driving unit further includes: A fourth rotating element, which is arranged at the proximal end of the fourth movable element and is used to rotate under the action of the fourth movable element; and / or The electric drive unit further includes: A first limiting element, which is arranged at the proximal end of the third movable element and is used to limit the position of the third movable element; and / or The electric drive unit further includes: A second limiting element, which is arranged at the distal end of the third movable element and is used to limit the position of the third movable element; and / or The electric drive unit further includes: A third limiting element, which is arranged at the proximal end of the fourth movable element and is used to limit the position of the fourth movable element; and / or The electric drive unit further includes: A fourth limiting element, which is arranged at the distal end of the fourth movable element and is used to limit the position of the fourth movable element; and / or The link drive unit further includes: A fifth rotating element, which is connected to the third control element and is used to rotate the third control element; and / or The meshing drive unit further includes: A sixth rotating element, which is connected to the fourth control element and is used to rotate the fourth control element; and / or The meshing drive unit further includes: A seventh rotating element, which is connected to the first gear element and the second gear element and is used to rotate the first gear element and the second gear element; and / or The ratchet drive unit further includes: An eighth rotating element, which is connected to the fifth control element and is used to rotate the fifth control element; and / or The ratchet drive unit further includes: A ninth rotating element, which is connected to the first ratchet element, the second ratchet element and the third gear element and is used to rotate the first ratchet element, the second ratchet element and the third gear element; and / or The ratchet drive unit further includes: A tenth rotating element, which is connected to the fourth gear element and the fifth gear element and is used to rotate the fourth gear element and the fifth gear element; and / or The ratchet drive unit further includes: At least one fifth limiting element, which is arranged at the side of the sixth control element and abuts against the first side of the third gear element, and is used to move axially along the third gear element under the action of the sixth control element so as to separate the third gear element from the electrode needle unit; and / or The ratchet drive unit further includes: At least one sixth limiting element, which is arranged at the side of the sixth control element and abuts against the first side of the fifth gear element, and is used to move axially along the fifth gear element under the action of the sixth control element so as to mesh the fifth gear element with the electrode needle unit; and / or The ratchet drive unit further includes: At least one seventh limiting element, which is arranged on the side of the seventh control element and abuts against the second side of the third gear element, and is used to move axially along the third gear element under the action of the seventh control element so that the third gear element meshes with the electrode needle unit; and / or The ratchet drive unit further includes: At least one eighth limiting element, which is arranged on the side of the seventh control element and abuts against the second side of the fifth gear element, and is used to move axially along the fifth gear element under the action of the seventh control element so that the fifth gear element is separated from the electrode needle unit; The ratchet drive unit further includes: A reset element, which is arranged at the proximal end of the sixth control element and is used to reset the sixth control element.

7. The radiofrequency ablation device according to claim 3, characterized in that, It further includes: A handle unit, which is respectively connected to the guide tube unit, the electric drive unit, the link drive unit, the meshing drive unit or the ratchet drive unit, and is used to fix the guide tube unit, the electric drive unit, the link drive unit, the meshing drive unit or the ratchet drive unit.

8. The radiofrequency ablation device according to claim 7, wherein, The handle unit includes: A first handle element; A first outlet element, which is arranged at the distal end of the first handle element and is connected to the guide tube unit; A second handle element, which is arranged on the side of the first handle element and is connected to the first handle element; A second outlet element, which is arranged at the distal end of the second handle element and is respectively connected to the first outlet element and the guide tube unit.

9. The radiofrequency ablation device according to claim 8, wherein The handle unit further includes: A third sliding element, which is arranged on the side of the first handle element and is slidably connected to the linkage unit, and is used to make the linkage unit reciprocate in the front-back direction and reciprocate in the left-right direction; and / or A fourth sliding element, which is arranged on the side of the second handle element and is slidably connected to the linkage unit, and is used to make the linkage unit reciprocate in the front-back direction and reciprocate in the left-right direction; and / or An eleventh rotating element, which is arranged on the first handle element and is connected to the electric drive unit, the link drive unit, the meshing drive unit or the ratchet drive unit; and / or A twelfth rotating element, which is arranged on the second handle element and is connected to the electric drive unit, the link drive unit, the meshing drive unit or the ratchet drive unit; and / or A thirteenth rotating element, which is arranged on the first handle element and is connected to the electric drive unit, the meshing drive unit or the ratchet drive unit; and / or A fourteenth rotating element, which is arranged on the second handle element and is connected to the electric drive unit, the meshing drive unit or the ratchet drive unit; and / or The fifteenth rotating element, which is arranged on the first handle element and connected to the ratchet driving unit; and / or The sixteenth rotating element, which is arranged on the second handle element and connected to the ratchet driving unit.

10. The radiofrequency ablation device according to claim 8 or 9, characterized in that, The handle unit further includes: The ninth limiting element, which is arranged inside the first handle element and abuts against the proximal end of the guiding tube unit for limiting the upper side of the guiding tube unit; and / or The tenth limiting element, which is arranged inside the second handle element and abuts against the proximal end of the electrode needle unit for limiting the upper side of the electrode needle unit; and / or The eleventh limiting element, which is arranged inside the first handle element and abuts against the proximal end of the guiding tube unit for limiting the lower side of the guiding tube unit; and / or The twelfth limiting element, which is arranged inside the second handle element and abuts against the proximal end of the electrode needle unit for limiting the lower side of the electrode needle unit; and / or At least one thirteenth limiting element, which is arranged on the side of the first handle element and is limit-connected to the ratchet driving unit for limiting the first side of the ratchet driving unit; and / or At least one fourteenth limiting element, which is arranged on the side of the first handle element and is limit-connected to the ratchet driving unit for limiting the first side of the ratchet driving unit; and / or At least one fifteenth limiting element, which is arranged on the side of the second handle element and is limit-connected to the ratchet driving unit for limiting the second side of the ratchet driving unit; and / or At least one sixteenth limiting element, which is arranged on the side of the second handle element and is limit-connected to the ratchet driving unit for limiting the second side of the ratchet driving unit.

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