Radio frequency ablation device

Abstract

The radiofrequency ablation device comprises a sheath tube unit, a guide tube unit and an electrode needle unit, under the condition that the guide tube unit is arranged in 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 through an opening element of the sheath tube unit, and the electrode needle unit conducts 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 radiofrequency ablation instruments, 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 deviations due to changes in the patient's body position or organ displacement, 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 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 enhanced some performances by integrating imaging modules or automated puncture mechanisms, the following core problems have not been solved:

[0007] 1) Device discreteness: Puncturing, guiding, and ablation are separated, resulting in multiple operations during the operation and increasing the risk of operation interruption;

[0008] 2) Steep learning curve: The multi-step operation requires the operator to have high experience, which limits 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 puncturing, guiding, energy output and real-time feedback functions through an integrated design to achieve 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 provide a radiofrequency ablation method, especially a radiofrequency ablation device, to solve the problems of device discreteness, steep learning curve, etc. existing in the related technologies. The present invention adopts the radiofrequency ablation (RFA) method, which is applicable to the application of soft tissues, hard tissues or natural cavities. Subsequently, radiofrequency ablation in the vertebral body is taken as an example for illustration.

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

[0012] In a first aspect, there is provided a radiofrequency ablation device, comprising:

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

[0014] An electrode needle unit, the electrode needle unit is removably disposed inside the sheath tube unit and is used for reciprocating movement along the axial direction of the sheath tube unit;

[0015] Wherein, when the electrode needle unit is disposed in the sheath tube unit, the distal end of the electrode needle unit is exposed through the distal end of the sheath tube unit, the distal end of the electrode needle unit is far from the distal end of the sheath tube unit and reaches the radiofrequency ablation position, and the electrode needle unit performs radiofrequency ablation operation.

[0016] In a second aspect, there is provided a radiofrequency ablation device, comprising:

[0017] A sheath tube unit, an opening element is provided at the end or side of the distal end of the sheath tube unit;

[0018] A guiding tube unit, the guiding tube unit is removably disposed inside the sheath tube unit;

[0019] 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;

[0020] Wherein, when the guiding tube unit is disposed in the sheath tube unit, the distal end of the guiding tube unit is exposed through the distal end of the sheath tube unit, the distal end of the electrode needle unit is far from the distal end of the guiding tube unit and reaches the radiofrequency ablation position, and the electrode needle unit performs radiofrequency ablation operation.

[0021] In some of the embodiments, it further comprises:

[0022] A spiral driving unit, the spiral 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.

[0023] In some of the embodiments, it further comprises:

[0024] An electric driving unit, the electric 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.

[0025] In some of the embodiments, it further comprises:

[0026] 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 guiding tube unit.

[0027] In some embodiments, it further includes:

[0028] An engagement 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 guiding tube unit.

[0029] In some embodiments, it further includes:

[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 guiding tube unit.

[0031] In some embodiments, it further includes:

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

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

[0034] A radiofrequency ablation device of the present invention integrates puncture, guidance, 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; integrating the puncture, guidance, and ablation design, 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 an identification function for accurate positioning; the guiding tube unit and the electrode needle unit are integrally arranged, with simple and convenient operation, reducing operation steps and improving operation efficiency; using the spiral drive unit and the spiral cooperation of 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; using the electric drive unit and the electric cooperation of 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; using the link drive cooperation with 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; using the gear-rack drive cooperation of the meshing drive 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; using the ratchet drive cooperation of the ratchet drive 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; using the handle unit, it is convenient for the operator to operate with one hand, liberating the operator and improving operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0038] Figure 4 is a schematic diagram (one) of an electrode needle unit according to an embodiment of the present invention;

[0039] Figure 5 is a schematic diagram (three) of a radiofrequency ablation device according to an embodiment of the present invention;

[0040] Figure 6 is a schematic diagram (four) of a radiofrequency ablation device according to an embodiment of the present invention;

[0041] Figure 7 is a schematic diagram (one) of a guiding tube unit according to an embodiment of the present invention;

[0042] Figures 8a to 8d It is a schematic diagram of the usage process of the radiofrequency ablation device according to an embodiment of the present invention;

[0043] Figure 9 It is a schematic diagram (five) of the radiofrequency ablation device according to an embodiment of the present invention;

[0044] Figure 10 It is a schematic diagram (two) of the electrode needle unit according to an embodiment of the present invention;

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

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

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

[0048] Figure 14 It is a schematic diagram (three) of the electrode needle unit according to an embodiment of the present invention;

[0049] Figure 15 It is a schematic diagram of the electric drive unit according to an embodiment of the present invention;

[0050] Figure 16 It is a schematic diagram (seven) of the radiofrequency ablation device according to an embodiment of the present invention;

[0051] Figure 17 It is a schematic diagram (four) of the electrode needle unit according to an embodiment of the present invention;

[0052] Figure 18 It is a schematic diagram of the link drive unit according to an embodiment of the present invention;

[0053] Figure 19 It is a schematic diagram (eight) of the radiofrequency ablation device according to an embodiment of the present invention;

[0054] Figure 20 It is a schematic diagram (five) of the electrode needle unit according to an embodiment of the present invention;

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

[0056] Figure 22 It is a schematic diagram (nine) of the radiofrequency ablation device according to an embodiment of the present invention;

[0057] Figure 23 It is a schematic diagram (six) of the electrode needle unit according to an embodiment of the present invention;

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

[0059] Figure 25 Schematic diagram (I) of a handle unit according to an embodiment of the present invention;

[0060] Figure 26 Schematic diagram (II) of a handle unit according to an embodiment of the present invention;

[0061] Figure 27 Schematic diagram (III) of a handle unit according to an embodiment of the present invention;

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

[0063] The reference numerals therein are: 100, sheath tube unit; 101, sheath tube element; 102, opening element; 103, first gripping element; 200, guide tube unit; 201, guide tube element; 202, sliding element;

[0064] 300, electrode needle unit; 301, electrode needle element; 302, groove element; 303, electrode plate element; 304, first threaded element; 305, first link element; 306, first movable element; 307, second link element; 308, third movable element; 309, first rack element; 310, third rack element;

[0065] 400, screw drive unit; 401, first control element; 402, second threaded element; 403, second gripping element;

[0066] 500, electric drive unit; 501, second control element; 502, second movable element; 503, first rotating element; 504, second rotating element; 505, first limiting element; 506, second limiting element;

[0067] 600, link drive unit; 601, third control element; 602, fourth movable element; 603, third rotating element;

[0068] 700, meshing drive unit; 701, fourth control element; 702, second rack element; 703, first gear element; 704, second gear element; 705, fourth rotating element; 706, fifth rotating element;

[0069] 800, Ratchet drive unit; 801, Fifth control element; 802, Fourth rack element; 803, First ratchet element; 804, Second ratchet element; 805, Third gear element; 806, Fourth gear element; 807, Fifth gear element; 808, Sixth control element; 809, Seventh control element; 810, Sixth rotating element; 811, Seventh rotating element; 812, Eighth rotating element; 813, Third limiting element; 814, Fourth limiting element; 815, Fifth limiting element; 816, Sixth limiting element; 817, Reset element;

[0070] 900, Handle unit; 901, First handle element; 902, First outlet element; 903, Second handle element; 904, Second outlet element; 905, Seventh limiting element; 906, Eighth limiting element; 907, Ninth limiting element; 908, Tenth limiting element; 909, Ninth rotating element; 910, Tenth rotating element; 911, Eleventh rotating element; 912, Twelfth rotating element; 913, Thirteenth rotating element; 914, Fourteenth rotating element; 915, Eleventh limiting element; 916, Twelfth limiting element; 917, Thirteenth limiting element; 918, Fourteenth limiting element. Detailed implementation mode

[0071] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0072] 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.

[0073] Next, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments, but it is not a limitation of the present invention.

[0074] Embodiment 1

[0075] A schematic embodiment of the present invention, as Figures 1 to 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 end or side of the distal end of the sheath tube unit 100; the electrode needle unit 300 is removably disposed inside the sheath tube unit 100 for reciprocating movement along the axial direction of the sheath tube unit 100.

[0076] 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.

[0077] Among them, when the electrode needle unit 300 is placed in the sheath tube unit 100, the distal end of the electrode needle unit 300 protrudes through the distal end of the sheath tube unit 100. The distal end of the electrode needle unit 300 is far from the distal end of the sheath tube unit 100 and reaches the radiofrequency ablation position, and the electrode needle unit 300 performs radiofrequency ablation operations.

[0078] 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 end or side of the distal end of the sheath tube unit 100, and the end is sharp; when applied to a natural cavity, that is, when no cavity needs to be established, the opening element 102 is provided on the side of the distal end of the sheath tube unit 100, and the end is hemispherical.

[0079] 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.

[0080] 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.

[0081] Generally, the output power of the radiofrequency ablation device is 20 - 100W, the output frequency is 300 - 600kHz, the controlled temperature range is 40 - 100°C, and the temperature change rate is 0 - 50°C / s.

[0082] 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 removably arranged inside the sheath tube element 101; the opening element 102 is arranged at the end or side of the distal end of the sheath tube element 101 for the distal end of the electrode needle unit 300 to pass through.

[0083] The sheath tube element 101 is of a hollow structure.

[0084] 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.

[0085] 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 planar.

[0086] The distal end of the sheath element 101 is of a closed structure or an open structure. When the distal end of the sheath element 101 is of a closed structure, the opening element 102 is arranged on the side of the distal end of the sheath element 101; when the distal end of the sheath element 101 is of an open structure, the opening element 102 is arranged at the end of the distal end of the sheath element 101.

[0087] In some of these embodiments, the sheath element 101 is made of stainless steel material.

[0088] In some of these embodiments, the sheath element 101 is a sheath tube.

[0089] The opening element 102 communicates with the inside of the sheath element 101.

[0090] When the opening element 102 is arranged on the side of the distal end of the sheath element 101, the connection position between the opening element 102 and the sheath element 101 is processed with an arc transition for guiding the electrode needle unit 300.

[0091] In some of these embodiments, the opening element 102 is a sheath opening.

[0092] Furthermore, the sheath unit 100 further includes a first gripping element 103. Among them, the first gripping element 103 is arranged at the proximal end of the sheath element 101 for an operator to grip.

[0093] The size of the first gripping element 103 matches the size of the sheath element 101. Generally, the radial dimension (such as diameter, length, width, etc.) of the first gripping element 103 is larger than the radial dimension of the sheath element 101.

[0094] In some of these embodiments, the cross-section of the structure formed by the first gripping element 103 and the sheath element 101 is in a T shape.

[0095] In some of these embodiments, the first gripping element 103 includes but is not limited to a gripping handle.

[0096] Furthermore, the sheath unit 100 further includes an identification element. Among them, the identification element is arranged on the outer edge surface of the sheath element 101 for indicating the current position.

[0097] In some of these embodiments, there are several identification elements. The several identification elements are arranged at intervals along the axial direction of the sheath element 101.

[0098] In some of these embodiments, the identification element includes but is not limited to scale lines, identification lines, identification points, etc.

[0099] Such as Figure 4As 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, and the electrode needle element 301 is movably disposed inside the guiding tube unit 200 for reciprocating movement along the axial direction of the guiding tube unit 200; a plurality of groove elements 302 are distributed at the distal end of the electrode needle element 301, and the groove elements 302 are annular; a plurality of electrode plate elements 303 are respectively disposed in the corresponding groove elements 302, and the electrode plate elements 303 are annular.

[0100] Specifically, the electrode needle element 301 is removably disposed inside the sheath element 101 for reciprocating movement along the axial direction of the sheath element 101.

[0101] Among them, the distal end of the electrode needle element 301 is away from the distal end of the sheath element 101 and reaches the radiofrequency ablation position.

[0102] In some embodiments, the distal end of the electrode needle element 301 is straight needle-shaped or bent needle-shaped.

[0103] The size of the electrode needle element 301 matches the size of the sheath element 101. 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 sheath element 101.

[0104] In some 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 removably disposed inside the sheath element 101, and a plurality of groove elements 302 are distributed at the distal end of the outer needle member; the inner needle member is disposed inside the outer needle member; the electrical connection member is disposed between the outer needle member and the inner needle member and is electrically connected to the corresponding electrode plate element 303 respectively.

[0105] In some embodiments, the outer needle member is made of a polymer material, including but not limited to pebax and PTEF materials.

[0106] Generally, the distal end of the inner needle member is sharp.

[0107] In some embodiments, the inner needle member is made of a shape memory alloy material.

[0108] In some embodiments, the electrical connection member includes but is not limited to wires.

[0109] A plurality of groove elements 302 are axially spaced along the electrode needle element 301 (outer needle member) at the distal end of the electrode needle element 301.

[0110] A plurality of groove elements 302 communicate with the inside of the electrode needle element 301 (outer needle member) respectively.

[0111] 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 part.

[0112] In some of these embodiments, the groove element 302 includes, but is not limited to, a placement groove.

[0113] The connection method between the electrode plate element 303 and the groove element 302 includes, but is not limited to, bonding, snap connection, etc.

[0114] The number of electrode plate elements 303 matches the number of groove elements 302. Generally, the number of electrode plate elements 303 is equal to the number of groove elements 302.

[0115] In some of these embodiments, the electrode plate element 303 includes, but is not limited to, an electrode plate.

[0116] Taking radiofrequency ablation in bone as an example for illustration, the usage method of the present invention is as follows:

[0117] Penetrate the sheath element 101 through the cortical bone and drive it into the cancellous bone;

[0118] Insert the electrode needle element 301 into the sheath element 101;

[0119] Expose the distal end of the electrode needle element 301 through the opening element 102, apply a force to the electrode needle element 301, so that the distal end of the electrode needle element 301 moves away from the opening element 102 and reaches the radiofrequency ablation position. During this process, the distal end of the electrode needle element 301 (i.e., the distal end of the inner needle part) can penetrate and enter the bone;

[0120] 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 all cancellous bone and the heating temperature is not higher than 85°C, it will not cause excessive damage to the surrounding tissues;

[0121] After the radiofrequency ablation operation is completed, apply a force to the electrode needle element 301, so that the distal end of the electrode needle element 301 approaches the sheath element 101 until the distal end of the electrode needle element 301 is located inside the sheath element 101;

[0122] Separate the electrode needle element 301 from the sheath element 101, and finally remove the sheath element 101.

[0123] 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 an identification function, facilitating precise positioning; the operation is simple and convenient, reducing the operation steps and improving the operation efficiency.

[0124] Embodiment 2

[0125] A schematic embodiment of the present invention is as follows Figures 5 to 6 As shown, a radiofrequency ablation device includes a sheath 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 distal end of the sheath unit 100; the guiding tube unit 200 is removably disposed inside the sheath unit 100; the electrode needle unit 300 is movably disposed inside the guiding tube unit 200 for reciprocating movement along the axial direction of the guiding tube unit 200.

[0126] For the radiofrequency ablation device of the present invention, it can be applied to scenarios such as tumor radiofrequency ablation, intracardiac radiofrequency ablation, and intraosseous radiofrequency ablation.

[0127] Among them, when the guiding tube unit 200 is placed in the sheath unit 100, the distal end of the guiding tube unit 200 protrudes through the distal end of the sheath unit 100, and the distal end of the electrode needle unit 300 is away from the distal end of the guiding tube unit 200 and reaches the radiofrequency ablation position, and the electrode needle unit 300 performs radiofrequency ablation operations.

[0128] Among them, in the initial state, the distal end of the electrode needle unit 300 is flush with the distal end of the guiding tube unit 200; in the working state, the distal end of the electrode needle unit 300 is away from the distal end of the guiding tube unit 200.

[0129] Among them, the sheath 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 distal end of the sheath 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 on the side of the distal end of the sheath unit 100, and the distal end is hemispherical.

[0130] Generally, the intraoperative access angle range of the sheath unit 100 forms an angle of 5 - 45° with the sagittal plane and an angle of 10 - 30° with the horizontal plane.

[0131] 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.

[0132] Generally, the output power of the radiofrequency ablation device is 20 - 100W, the output frequency is 300 - 600kHz, the controlled temperature range is 40 - 100°C, and the temperature change rate is 0 - 50°C / s.

[0133] As Figure 3As 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 removably arranged inside the sheath tube element 101; the opening element 102 is arranged at the end or side of the distal end of the sheath tube element 101 for the distal end of the electrode needle unit 300 to pass through.

[0134] The sheath tube element 101 has a hollow structure.

[0135] In some embodiments, the distal end of the sheath tube element 101 is sharp and is configured to have a tapered end structure.

[0136] In some embodiments, the distal end of the sheath tube element 101 is blunt and is configured such that the end of the sheath tube element 101 is arc-shaped or hemispherical or planar.

[0137] 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.

[0138] In some embodiments, the sheath tube element 101 is made of stainless steel material.

[0139] In some embodiments, the sheath tube element 101 is a sheath tube.

[0140] The opening element 102 is in communication with the inside of the sheath tube element 101.

[0141] When the opening element 102 is arranged at the side of the distal end of the sheath tube element 101, the connection 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.

[0142] In some embodiments, the opening element 102 is a sheath tube opening.

[0143] Furthermore, the sheath tube unit 100 further includes a first holding element 103. Among them, the first holding element 103 is arranged at the proximal end of the sheath tube element 101 for an operator to hold.

[0144] The size of the first holding element 103 matches the size of the sheath tube element 101. Generally, the radial dimension (such as diameter, length, width, etc.) of the first holding element 103 is larger than the radial dimension of the sheath tube element 101.

[0145] In some embodiments, the cross-section of the structure formed by the first holding element 103 and the sheath tube element 101 is T-shaped.

[0146] In some of these embodiments, the first holding element 103 includes, but is not limited to, a holding handle.

[0147] Furthermore, the sheath unit 100 further includes an identification element. Among them, the identification element is disposed on the outer edge surface of the sheath element 101 for indicating the current position.

[0148] 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.

[0149] In some of these embodiments, the identification element includes, but is not limited to, scale lines, identification lines, identification points, etc.

[0150] As Figure 7 shown, the guiding tube unit 200 includes a guiding tube element 201. Among them, the guiding tube element 201 is removably disposed inside the sheath unit 100, and an electrode needle unit 300 is movably disposed inside the guiding tube element 201.

[0151] Specifically, the guiding tube element 201 is removably disposed inside the sheath element 101.

[0152] Among them, the distal end of the guiding tube element 201 is exposed through the opening element 102.

[0153] The guiding tube element 201 is a hollow structure.

[0154] 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.

[0155] 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.

[0156] In some of these embodiments, the guiding tube element 201 is made of a shape memory alloy material.

[0157] In some of these embodiments, the guiding tube element 201 is a guiding tube.

[0158] As Figure 4 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, and the electrode needle element 301 is movably disposed 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 disposed in the corresponding groove elements 302, and the electrode plate elements 303 are annular.

[0159] Specifically, the electrode needle element 301 is movably disposed inside the guiding tube element 201 and is used for reciprocating movement along the axial direction of the guiding tube element 201.

[0160] Among them, the distal end of the electrode needle element 301 is away from the distal end of the guiding tube element 201 and reaches the radiofrequency ablation position.

[0161] In some of these embodiments, the distal end of the electrode needle element 301 is in a straight needle shape or a bent needle shape.

[0162] 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.

[0163] 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 disposed 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 disposed inside the outer needle member; the electrical connection member is disposed between the outer needle member and the inner needle member and is electrically connected to the corresponding electrode sheet element 303 respectively.

[0164] In some of these embodiments, the outer needle member is made of a polymer material, including but not limited to pebax and PTEF materials.

[0165] Generally, the distal end of the inner needle member is sharp.

[0166] In some of these embodiments, the inner needle member is made of a shape memory alloy material.

[0167] In some of these embodiments, the electrical connection member includes but is not limited to a wire.

[0168] A plurality of groove elements 302 are axially spaced along the electrode needle element 301 (outer needle member) at the distal end of the electrode needle element 301.

[0169] A plurality of groove elements 302 communicate with the inside of the electrode needle element 301 (outer needle member) respectively.

[0170] 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.

[0171] In some of these embodiments, the groove element 302 includes but is not limited to a placement groove.

[0172] The connection method between the electrode sheet element 303 and the groove element 302 includes but is not limited to bonding, clamping, etc.

[0173] The number of electrode sheet elements 303 matches the number of groove elements 302. Generally, the number of electrode sheet elements 303 is equal to the number of groove elements 302.

[0174] In some of these embodiments, the electrode sheet elements 303 include, but are not limited to, electrode sheets.

[0175] As Figures 8a to 8d shown, taking radiofrequency ablation in bone as an example for illustration, the usage method of the present invention is as follows:

[0176] Penetrate the sheath element 101 through the cortical bone and drive it into the cancellous bone;

[0177] Insert the guiding tube element 201 and the electrode needle element 301 into the sheath element 101. At this time, the distal end of the electrode needle element 301 is flush with the distal end of the guiding tube element 201;

[0178] Expose the distal end of the guiding tube element 201 through the opening element 102, apply a force to the electrode needle element 301, so that the distal end of the electrode needle element 301 moves away from the guiding tube element 201 and reaches the radiofrequency ablation position. 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;

[0179] 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 all cancellous bone and the heating temperature is not higher than 85°C, it will not cause excessive damage to the surrounding tissues;

[0180] After the radiofrequency ablation operation is completed, apply a force to the electrode needle element 301 to make the distal end of the electrode needle element 301 close 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;

[0181] Separate the guiding tube element 201, the electrode needle element 301 from the sheath element 101, and finally remove the sheath element 101.

[0182] 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 an identification function, facilitating precise positioning; 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.

[0183] Embodiment 3

[0184] This embodiment is a variant embodiment of Embodiment 2.

[0185] As Figure 9As shown, the radiofrequency ablation device further includes a screw drive unit 400. The screw drive unit 400 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 guide tube unit 200.

[0186] As Figure 10 shown, the electrode needle unit 300 further includes a first threaded element 304. The first threaded element 304 is disposed at the proximal end of the electrode needle unit 300 and is in screw connection with the screw drive unit 400, and is configured to drive the electrode needle unit 300 to reciprocate axially along the guide tube unit 200 under the action of the screw drive unit 400.

[0187] Specifically, the first threaded element 304 is disposed at the proximal end of the electrode needle element 301 (outer needle member) and is configured to drive the electrode needle element 301 to reciprocate axially along the guide tube element 201.

[0188] The size of the first threaded element 304 is matched with the size of the electrode needle element 301. Generally, the axial dimension of the first threaded element 304 is smaller than the axial dimension of the electrode needle element 301.

[0189] In some of these embodiments, the first threaded element 304 includes, but is not limited to, an external thread and an internal thread.

[0190] As Figure 11 shown, the screw drive unit 400 includes a first control element 401 and a second threaded element 402. The first control element 401 is movably disposed at the proximal end of the electrode needle unit 300; the second threaded element 402 is disposed at the distal end of the first control element 401 and is in screw connection with the proximal end of the electrode needle unit 300, and is configured to drive the electrode needle unit 300 to reciprocate axially along the guide tube unit 200 under the action of the first control element 401.

[0191] Specifically, the first control element 401 is movably disposed at the proximal end of the electrode needle element 301; the second threaded element 402 is in screw connection with the first threaded element 304 and is configured to drive the electrode needle element 301 to reciprocate axially along the guide tube element 201 through the first threaded element 304.

[0192] The working principle of the screw drive unit 400 is to convert rotational motion into linear motion, so that the electrode needle element 301 can perform linear reciprocating motion.

[0193] In some of these embodiments, the first control element 401 includes a control member, a first rotating member, and a second rotating member. Among them, the control member is rotatably disposed at the proximal end of the electrode needle element 301; the first rotating member is disposed at the distal end of the control member and is connected to the control member for rotating under the action of the control member; the second rotating member is disposed at the distal end of the first rotating member, and a second threaded element 402 is disposed at the distal end of the second rotating member, and is connected to the first rotating member for driving the second threaded element 402 to rotate under the action of the first rotating member.

[0194] In some of these embodiments, the control member includes, but is not limited to, a control knob.

[0195] The size of the first rotating member matches the size of the control member. Generally, the radial size of the first rotating member is smaller than the radial size of the control member.

[0196] In some of these embodiments, the first rotating member includes, but is not limited to, a rotating shaft.

[0197] The size of the second rotating member matches the size of the first rotating member. Generally, the radial size of the second rotating member is larger than the radial size of the first rotating member.

[0198] In some of these embodiments, the second rotating member includes, but is not limited to, a rotating shaft and a rotating cylinder.

[0199] The size of the second threaded element 402 matches the size of the first control element 401. Generally, the axial size of the second threaded element 402 is smaller than the axial size of the second rotating member.

[0200] In some of these embodiments, the second threaded element 402 includes, but is not limited to, an external thread and an internal thread. Generally, the first threaded element 304 is one of an external thread and an internal thread, and the second threaded element 402 is the other of an external thread and an internal thread.

[0201] Furthermore, the screw drive unit 400 further includes a second gripping element 403. Among them, the second gripping element 403 is disposed at the proximal end of the guide tube unit 200, the distal end of the second gripping element 403 is connected to the proximal end of the guide tube unit 200, and the distal end of the second gripping element 403 is rotatably connected to the first control element 401.

[0202] Specifically, the second gripping element 403 is disposed at the proximal end of the guide tube element 201, and the distal end of the second gripping element 403 is connected to the proximal end of the guide tube element 201.

[0203] Among them, the purpose of setting the second gripping element 403 is to keep the guide tube element 201 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 guide tube element 201 does not perform any movement.

[0204] The connection mode of the second holding element 403 and the guiding tube element 201 includes, but is not limited to, plugging, bonding, etc.

[0205] In some of these embodiments, the second holding element 403 includes a holding member, a first through groove member, a second through groove member, and a third through groove member. Among them, the holding member is arranged at the proximal end of the guiding tube element 201, and the operating member of the first operating element 401 is arranged outside the distal end of the holding member; the first through groove member is arranged at the proximal end of the holding member and is rotatably connected to the first rotating member of the first operating element 401; the second through groove member is arranged inside the holding member, communicates with the first through groove member, and is rotatably connected to the second rotating member of the first operating element 401; the third through groove member is arranged at the distal end of the holding member, communicates with the second through groove member, and is rotatably and slidably connected to the proximal end of the electrode needle element 301 or connected to the proximal end of the guiding tube element 201.

[0206] The size of the first through groove member matches the size of the first rotating member. Generally, the radial dimension of the first through groove member is equal to the radial dimension of the first rotating member, and the radial dimension of the first through groove member is not greater than the radial dimension of the first rotating member.

[0207] The size of the second through groove member matches the size of the second rotating member. Generally, the radial dimension of the second through groove member is equal to the radial dimension of the second rotating member, and the axial dimension of the second through groove member is equal to the axial dimension of the second rotating member.

[0208] 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.

[0209] The size of the third through groove member matches the size of the guiding tube element 201. Generally, the radial dimension of the third through groove member is equal to the radial dimension of the outer edge surface of the guiding tube element 201.

[0210] The size of the third through groove member matches the size of the electrode needle element 301. 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.

[0211] 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 smaller than the radial dimension of the second through groove member.

[0212] The usage method of the present invention is as follows:

[0213] Penetrate the sheath tube element 101 through the cortical bone and drive it into the cancellous bone;

[0214] Insert the guiding tube element 201 and the electrode needle element 301 into the sheath tube element 101. At this time, the distal end of the electrode needle element 301 is flush with the distal end of the guiding tube element 201;

[0215] Expose the distal end of the guiding tube element 201 through the opening element 102. Rotate the first control element 401 in the first direction (such as the clockwise direction). Under the cooperation of the second threaded element 402 and the first 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.

[0216] 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.

[0217] After the radiofrequency ablation operation is completed, rotate the first control element 401 in the second direction (such as the counterclockwise direction). Under the cooperation of the second threaded element 402 and the first 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.

[0218] Separate the guiding tube element 201, the electrode needle element 301 from the sheath tube element 101, and finally remove the sheath tube element 101.

[0219] The technical effects of the present invention are as follows: By using the spiral cooperation of the spiral drive unit and the electrode needle unit, the moving speed and moving position of the electrode needle unit can be accurately controlled, which is convenient for accurately controlling the electrode needle unit.

[0220] Embodiment 3

[0221] This embodiment is a variant embodiment of Embodiment 2.

[0222] As Figure 12 shown, the radiofrequency ablation device further includes an electric drive unit 500. Among them, the electric 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 guiding tube unit 200.

[0223] As Figure 13 shown, the guiding tube unit 200 further includes at least one sliding element 202. Among them, the sliding element 202 is arranged at the proximal end of the guiding tube unit 200, penetrates through the side part of the guiding tube unit 200, and is slidably connected to the electrode needle unit 300.

[0224] Specifically, the sliding element 202 is arranged at the proximal end of the guiding tube element 201 and penetrates through the side part of the guiding tube element 201.

[0225] In some of these embodiments, there are two sliding elements 202. The two sliding elements 202 are symmetrically arranged on both sides of the guide tube element 201.

[0226] In some of these embodiments, the sliding element 202 includes, but is not limited to, a sliding slit and a sliding groove.

[0227] As Figure 14 shown, the electrode needle unit 300 further includes at least one first link element 305 and at least one first movable element 306. Among them, the first link element 305 is arranged at the proximal end of the electrode needle unit 300. The distal end of the first 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 first movable element 306 is arranged at the proximal end of the first link element 305 and is movably connected to the electric drive unit 500 and is used to drive the first link element 305 to reciprocate axially along the guide tube unit 200 under the action of the electric drive unit 500.

[0228] Specifically, the first link element 305 is arranged at the proximal end of the electrode needle element 301 (outer needle member). The distal end of the first link element 305 is connected to the proximal end of the electrode needle element 301 and is slidably connected to the sliding element 202 and is used to drive the electrode needle element 301 to reciprocate axially along the guide tube element 201.

[0229] The connection manner between the first link element 305 and the electrode needle element 301 includes, but is not limited to, bonding and clamping.

[0230] The number of the first link elements 305 matches the number of the sliding elements 202. Generally, the number of the first link elements 305 is equal to the number of the sliding elements 202.

[0231] In some of these embodiments, there are two first link elements 305. The two first link elements 305 are symmetrically arranged on both sides of the electrode needle element 301.

[0232] In some of these embodiments, the first link element 305 includes, but is not limited to, a connecting rod.

[0233] The connection manner between the first movable element 306 and the first link element 305 includes, but is not limited to, fixed connection, such as welding and integral molding.

[0234] The number of the first movable elements 306 matches the number of the first link elements 305. Generally, the number of the first movable elements 306 is not greater than the number of the first link elements 305. Preferably, the number of the first movable elements 306 is equal to the number of the first link elements 305.

[0235] In some of these embodiments, the first movable element 306 includes, but is not limited to, a threaded rotating base.

[0236] As Figure 15 shown, the electric drive unit 500 includes a second control element 501 and at least one second movable element 502. Among them, the second control element 501 is disposed at the proximal end of the electrode needle unit 300; the second movable element 502 is disposed at the output end of the second control element 501 and is movably connected to the electrode needle unit 300, and is configured 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.

[0237] Specifically, the second control element 501 is disposed at the proximal end of the electrode needle element 301; the second movable element 502 is movably connected to the first movable element 306, and is configured to drive the electrode needle element 301 to reciprocate axially along the guide tube element 201 through the first link element 305.

[0238] The working principle of the electric drive unit 500 is to convert rotational motion into linear motion, so that the electrode needle element 301 can perform linear reciprocating motion.

[0239] In some of these embodiments, the second control element 501 includes, but is not limited to, a drive motor.

[0240] The second movable element 502 is rotationally connected and slidably connected to the first movable element 306.

[0241] The number of the second movable elements 502 matches the number of the first movable elements 306. Generally, the number of the second movable elements 502 is equal to the number of the first movable elements 306.

[0242] In some of these embodiments, the second movable element 502 includes, but is not limited to, a screw.

[0243] Furthermore, the electric drive unit 500 further includes at least one first rotating element 503. Among them, the first rotating element 503 is disposed at the distal end of the second movable element 502 and is configured to rotate under the action of the second movable element 502.

[0244] The connection manner between the first rotating element 503 and the second movable element 502 includes, but is not limited to, fixed connection, such as welding and integral molding.

[0245] The number of the first rotating elements 503 matches the number of the second movable elements 502. Generally, the number of the first rotating elements 503 is equal to the number of the second movable elements 502.

[0246] In some of these embodiments, the first rotating element 503 includes, but is not limited to, a rotating column and a rotating shaft.

[0247] Furthermore, the electric drive unit 500 further includes at least one second rotating element 504. The second rotating element 504 is disposed at the proximal end of the second movable element 502 and is configured to rotate under the action of the second movable element 502.

[0248] The connection manner between the second rotating element 504 and the second movable element 502 includes, but is not limited to, a fixed connection, such as welding or integral molding.

[0249] The number of the second rotating elements 504 matches the number of the second movable elements 502. Generally, the number of the second rotating elements 504 is equal to the number of the second movable elements 502.

[0250] In some embodiments, the second rotating element 504 includes, but is not limited to, a rotating column or a rotating shaft.

[0251] Furthermore, the electric drive unit 500 further includes at least one first limiting element 505. The first limiting element 505 is disposed at the proximal end of the second movable element 502 and is configured to limit the position of the second movable element 502.

[0252] Generally, the first limiting element 505 is disposed between the first rotating element 503 and the second movable element 502.

[0253] The size of the first limiting element 505 matches the size of the second movable element 502 and the size of the first rotating element 503. Generally, the radial dimension of the first limiting element 505 is greater than the radial dimensions of the second movable element 502 and the first rotating element 503.

[0254] The connection manner between the first limiting element 505 and the second movable element 502 includes, but is not limited to, a fixed connection, such as welding or integral molding.

[0255] The number of the first limiting elements 505 matches the number of the second movable elements 502. Generally, the number of the first limiting elements 505 is equal to the number of the second movable elements 502.

[0256] In some embodiments, the first limiting element 505 includes, but is not limited to, a limiting ring or a limiting plate.

[0257] Furthermore, the electric drive unit 500 further includes at least one second limiting element 506. The second limiting element 506 is disposed at the distal end of the second movable element 502 and is configured to limit the position of the second movable element 502.

[0258] Generally, the second limiting element 506 is disposed between the second rotating element 504 and the second movable element 502.

[0259] The size of the second limiting element 506 matches the sizes of the second movable element 502 and the second rotating element 504. Generally, the radial size of the second limiting element 506 is greater than the radial sizes of the second movable element 502 and the second rotating element 504.

[0260] The connection manner between the second limiting element 506 and the second movable element 502 includes but is not limited to fixed connection, such as welding and integral molding.

[0261] The quantity of the second limiting elements 506 matches the quantity of the second movable elements 502. Generally, the quantity of the second limiting elements 506 is equal to the quantity of the second movable elements 502.

[0262] In some of the embodiments, the second limiting element 506 includes but is not limited to a limiting ring and a limiting plate.

[0263] The usage method of the present invention is as follows:

[0264] Penetrate the sheath element 101 through the cortical bone and drive it into the cancellous bone;

[0265] Insert the guiding tube element 201 and the electrode needle element 301 into the sheath element 101. At this time, the distal end of the electrode needle element 301 is flush with the distal end of the guiding tube element 201;

[0266] Expose the distal end of the guiding tube element 201 through the opening element 102, start the second control element 501, and drive the second movable element 502 to rotate in the first direction (such as the clockwise direction). Under the cooperation of the second movable element 502 and the first movable element 306, the first link element 305 drives the distal end of the electrode needle element 301 away from the guiding tube element 201 and reaches the radiofrequency ablation position, then stop the second control element 501;

[0267] Start the power supply, and 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;

[0268] After the radiofrequency ablation operation is completed, start the second control element 501, and drive the second movable element 502 to rotate in the second direction (such as the counterclockwise direction). Under the cooperation of the second movable element 502 and the first movable element 306, the first link element 305 drives the distal end of the electrode needle element 301 close 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, then stop the second control element 501;

[0269] Separate the guide tube element 201, the electrode needle element 301 from the sheath tube element 101, and finally remove the sheath tube element 101.

[0270] The technical effects of the present invention are as follows: By using the electric cooperation between the electric drive unit and the electrode needle unit, the moving position of the electrode needle unit can be accurately controlled, which is convenient for accurately controlling the electrode needle unit.

[0271] Embodiment 5

[0272] This embodiment is a variant embodiment of Embodiment 2.

[0273] As Figure 16 shown, the radiofrequency ablation device further includes a link drive unit 600. Among them, the link drive unit 600 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.

[0274] As Figure 13 shown, the guide tube unit 200 further includes at least one sliding element 202. Among them, the sliding element 202 is arranged at the proximal end of the guide tube unit 200, penetrates through the side part of the guide tube unit 200, and is slidably connected to the electrode needle unit 300.

[0275] Specifically, the sliding element 202 is arranged at the proximal end of the guide tube element 201 and penetrates through the side part of the guide tube element 201.

[0276] In some of these embodiments, there are two sliding elements 202. The two sliding elements 202 are symmetrically arranged on both sides of the guide tube element 201.

[0277] In some of these embodiments, the sliding element 202 includes but is not limited to a sliding slit and a sliding groove.

[0278] As Figure 17 shown, the electrode needle unit 300 further includes at least one second link element 307 and a third movable element 308. Among them, the second link element 307 is arranged at the proximal end of the electrode needle unit 300, the distal end of the second link element 307 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 third movable element 308 is arranged at the proximal end of the second link element 307 and is movably connected to the link drive unit 600, and is used to drive the second link element 307 to reciprocate axially along the guide tube unit 200 under the action of the link drive unit 600.

[0279] Specifically, the second link element 307 is disposed at the proximal end of the electrode needle element 301 (outer needle member). The distal end of the second link element 307 is connected to the proximal end of the electrode needle element 301 and is slidably connected to the sliding element 202, and is configured to drive the electrode needle element 301 to reciprocate axially along the guide tube element 201.

[0280] The connection manner between the second link element 307 and the electrode needle element 301 includes, but is not limited to, adhesion, snap connection, etc.

[0281] The number of the second link elements 307 matches the number of the sliding elements 202. Generally, the number of the second link elements 307 is equal to the number of the sliding elements 202.

[0282] In some embodiments, there are two second link elements 307. The two second link elements 307 are symmetrically disposed on both sides of the electrode needle element 301.

[0283] In some embodiments, the two second link elements 307 are integrally formed to form a link frame structure.

[0284] In some embodiments, the second link element 307 includes, but is not limited to, a link.

[0285] The connection manner between the third movable element 308 and the second link element 307 includes, but is not limited to, fixed connection and rotational connection.

[0286] In some embodiments, the third movable element 308 includes, but is not limited to, a rotating shaft.

[0287] As Figure 18 shown, the link drive unit 600 includes a third control element 601 and a fourth movable element 602. Among them, the third control element 601 is movably disposed at the proximal end of the electrode needle unit 300; the fourth movable element 602 is disposed at the end of the third control element 601 and is movably connected to the electrode needle unit 300, and is configured 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.

[0288] Specifically, the third control element 601 is movably disposed at the proximal end of the electrode needle element 301; the fourth movable element 602 is movably connected to the third movable element 308, and is configured to drive the electrode needle element 301 to reciprocate axially along the guide tube element 201 through the second link element 307.

[0289] The working principle of the link drive unit 600 is to convert rotational motion into linear motion, so that the electrode needle element 301 can perform linear reciprocating motion.

[0290] The third control element 601 is rotatably disposed at the proximal end of the electrode needle element 301.

[0291] In some of these embodiments, the third control element 601 includes, but is not limited to, a control trigger.

[0292] The fourth movable element 602 is rotationally and slidably connected to the third movable element 308.

[0293] The movement range of the third movable element 308 can be limited by the size of the fourth movable element 602.

[0294] In some of these embodiments, the fourth movable element 602 includes, but is not limited to, a movable slot.

[0295] Furthermore, the link drive unit 600 further includes a third rotating element 603. Wherein, the third rotating element 603 is connected to the third control element 601 and is used to rotate the third control element 601.

[0296] The third rotating element 603 is disposed in the middle of the third control element 601. For example, the third rotating element 603 is disposed close to the fourth movable element 602.

[0297] By using the third rotating element 603, the third control element 601 can be rotated about the axis of the third rotating element 603, thereby defining the rotation center of the third control element 601.

[0298] The third rotating element 603 and the third control element 601 can be detachably connected or fixedly connected. For example, plugging, integral molding, etc.

[0299] In some of these embodiments, the third rotating element 603 includes, but is not limited to, a rotating shaft.

[0300] The usage method of the present invention is as follows:

[0301] Penetrate the sheath element 101 through the cortical bone and drive it into the cancellous bone;

[0302] Insert the guiding tube element 201 and the electrode needle element 301 into the sheath element 101. At this time, the distal end of the electrode needle element 301 is flush with the distal end of the guiding tube element 201;

[0303] Expose the distal end of the guiding tube element 201 through the opening element 102, and rotate the third control element 601 in the first direction (such as the clockwise direction). Under the cooperation of the fourth movable element 602 and the third movable element 308, the second link element 307 drives the distal end of the electrode needle element 301 away from the guiding tube element 201 and reaches the radiofrequency ablation position;

[0304] Turn on 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 surroundings of the radiofrequency ablation position are all cancellous bones and the heating temperature is not higher than 85°C, it will not cause excessive damage to the surrounding tissues.

[0305] After the radiofrequency ablation operation is completed, rotate the third control element 601 in the second direction (such as the counterclockwise direction). Under the cooperation of the fourth moving element 602 and the third moving element 308, the second connecting rod element 307 drives the distal end of the electrode needle element 301 to approach the distal end of 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.

[0306] Separate the guiding tube element 201, the electrode needle element 301 from the sheath tube element 101, and finally remove the sheath tube element 101.

[0307] The technical effects of the present invention are as follows: By using the linkage drive cooperation between the linkage drive unit and the electrode needle unit, the moving position of the electrode needle unit can be accurately controlled, which is convenient for accurately controlling the electrode needle unit.

[0308] Embodiment 6

[0309] This embodiment is a variant embodiment of Embodiment 2.

[0310] As Figure 19 shown, the radiofrequency ablation device further includes an engagement drive unit 700. Among them, the engagement drive unit 700 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 guiding tube unit 200.

[0311] As Figure 13 shown, the guiding tube unit 200 further includes at least one sliding element 202. Among them, the sliding element 202 is arranged at the proximal end of the guiding tube unit 200, penetrates through the side part of the guiding tube unit 200, and is slidably connected to the electrode needle unit 300.

[0312] Specifically, the sliding element 202 is arranged at the proximal end of the guiding tube element 201 and penetrates through the side part of the guiding tube element 201.

[0313] In some of the embodiments, there are two sliding elements 202. The two sliding elements 202 are symmetrically arranged on both sides of the guiding tube element 201.

[0314] In some of the embodiments, the sliding element 202 includes but is not limited to a sliding slit and a sliding groove.

[0315] As Figure 20As shown, the electrode needle unit 300 further includes at least one first rack element 309. Wherein, the first rack element 309 is disposed at the proximal end of the electrode needle unit 300, the distal end of the first rack element 309 is connected to the proximal end of the electrode needle unit 300, and is engaged with the meshing drive unit 700, and is configured to drive the electrode needle unit 300 to reciprocate axially along the guide tube unit 200 under the action of the meshing drive unit 700.

[0316] Specifically, the first rack element 309 is disposed at the proximal end of the electrode needle element 301 (outer needle member), the distal end of the first rack element 309 is connected to the proximal end of the electrode needle element 301, and is slidably connected to the sliding element 202, and is configured to drive the electrode needle element 301 to reciprocate axially along the guide tube element 201.

[0317] The connection manner between the first rack element 309 and the electrode needle element 301 includes, but is not limited to, bonding, snap connection, etc.

[0318] The number of the first rack elements 309 matches the number of the sliding elements 202. Generally, the number of the first rack elements 309 is equal to the number of the sliding elements 202.

[0319] In some embodiments, there are two first rack elements 309. The two first rack elements 309 are symmetrically disposed on both sides of the electrode needle element 301.

[0320] In some embodiments, the first rack element 309 includes a first connecting member and a first toothed member. Wherein, 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 outer needle member, and is slidably connected to the sliding element 202; the first toothed member is disposed at the proximal end of the first connecting member, the distal end of the first toothed member is connected to the proximal end of the first connecting member, and is engaged with the meshing drive unit 700.

[0321] In some embodiments, the first connecting member includes, but is not limited to, a connecting rod.

[0322] In some embodiments, the first toothed member includes, but is not limited to, a rack.

[0323] Such as Figure 21As shown, the meshing drive unit 700 includes a fourth control element 701, a second rack element 702, a first gear element 703, and at least one second gear element 704. Among them, the fourth control element 701 is movably arranged at the proximal end of the electrode needle unit 300; the second rack element 702 is arranged at the end of the fourth control element 701 and is used for reciprocating movement under the action of the fourth control element 701; the first gear element 703 is movably arranged at the end of the fourth control element 701 and meshes with the second rack element 702, and is used for reciprocating rotation under the action of the second rack element 702; the second gear element 704 is coaxially arranged with the first gear element 703 and meshes with the electrode needle unit 300, and is used for driving the electrode needle unit 300 to reciprocate axially along the guide tube unit 200 under the action of the first gear element 703.

[0324] Specifically, the fourth control element 701 is movably arranged at the proximal end of the electrode needle element 301; the second gear element 704 meshes with the first rack element 309 and is used for driving the electrode needle element 301 to reciprocate axially along the guide tube element 201 through the first rack element 309.

[0325] The working principle of the meshing drive unit 700 is to convert rotational motion into linear motion, so that the electrode needle element 301 can perform linear reciprocating motion.

[0326] The fourth control element 701 is rotatably arranged at the proximal end of the electrode needle element 301.

[0327] In some of these embodiments, the fourth control element 701 includes, but is not limited to, a control trigger.

[0328] The second rack element 702 is arranged at the top of the fourth control element 701 and is used for reciprocating rotation under the action of the fourth control element 701.

[0329] The cross-section of the second rack element 702 is arc-shaped. Specifically, the middle of the second rack element 702 is higher than both ends of the second rack element 702.

[0330] In some of these embodiments, the second rack element 702 includes, but is not limited to, a rack.

[0331] In some of these embodiments, the first gear element 703 includes, but is not limited to, a gear.

[0332] The second gear element 704 and the first gear element 703 can be detachably connected or fixedly connected. For example, snap connection, integrally formed, etc.

[0333] The size of the second gear element 704 matches the size of the first gear element 703. Generally, the radial size of the second gear element 704 is larger than the radial size of the first gear element 703.

[0334] The number of the second gear elements 704 matches the number of the first rack elements 309. Generally, the number of the second gear elements 704 is equal to the number of the first rack elements 309.

[0335] In some of these embodiments, there are two second gear elements 704. The two second gear elements 704 are symmetrically arranged on both sides of the first gear element 703 and are respectively connected to the first gear element 703.

[0336] In some of these embodiments, the second gear element 704 includes, but is not limited to, a gear.

[0337] Furthermore, the meshing drive unit 700 further includes a fourth rotating element 705. Among them, the fourth rotating element 705 is connected to the fourth control element 701 and is used to rotate the fourth control element 701.

[0338] The fourth rotating element 705 is arranged in the middle of the fourth control element 701. For example, the fourth rotating element 705 is arranged close to the second rack element 702.

[0339] By using the fourth rotating element 705, the fourth control element 701 can be rotated about the axis of the fourth rotating element 705, thereby defining the rotation center of the fourth control element 701.

[0340] The fourth rotating element 705 and the fourth control element 701 can be detachably connected or fixedly connected. For example, plugging, integrally forming, etc.

[0341] In some of these embodiments, the fourth rotating element 705 includes, but is not limited to, a rotating shaft.

[0342] Furthermore, the meshing drive unit 700 further includes a fifth rotating element 706. Among them, the fifth rotating element 706 is respectively connected to the first gear element 703 and the second gear element 704 and is used to rotate the first gear element 703 and the second gear element 704.

[0343] The fifth rotating element 706 is coaxially arranged with the first gear element 703 and the second gear element 704.

[0344] By using the fifth rotating element 706, the first gear element 703 and the second gear element 704 can be rotated about the axis of the fifth rotating element 706, thereby defining the rotation centers of the first gear element 703 and the second gear element 704.

[0345] The fifth rotating element 706 can be detachably connected or fixedly connected to the first gear element 703 and the second gear element 704. For example, plugging, integrally molding, etc.

[0346] In some of these embodiments, the fifth rotating element 706 includes, but is not limited to, a rotating shaft.

[0347] The usage method of the present invention is as follows:

[0348] Penetrate the sheath element 101 through the cortical bone and drive it into the cancellous bone;

[0349] Insert the guiding tube element 201 and the electrode needle element 301 into the sheath element 101. At this time, the distal end of the electrode needle element 301 is flush with the distal end of the guiding tube element 201;

[0350] Expose the distal end of the guiding tube element 201 through the opening element 102, rotate the fourth control element 701 in the first direction (such as the clockwise direction). Under the cooperation of the second rack element 702 and the first gear element 703, the second gear element 704 rotates in the first direction. Under the cooperation of the second gear element 704 and the first rack element 309, the first rack element 309 drives the distal end of the electrode needle element 301 away from the guiding tube element 201 and reaches the radiofrequency ablation position;

[0351] 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;

[0352] After the radiofrequency ablation operation is completed, rotate the fourth control element 701 in the second direction (such as the counterclockwise direction). Under the cooperation of the second rack element 702 and the first gear element 703, the second gear element 704 rotates in the second direction. Under the cooperation of the second gear element 704 and the first rack element 309, the first rack element 309 drives the distal end of the electrode needle element 301 close 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;

[0353] Separate the guiding tube element 201, the electrode needle element 301 from the sheath element 101, and finally remove the sheath element 101.

[0354] The technical effects of the present invention are as follows: By using the gear-rack drive cooperation of the meshing drive unit and the electrode needle unit, the moving speed and moving position of the electrode needle unit can be accurately controlled, which is convenient for accurately controlling the electrode needle unit.

[0355] Embodiment 8

[0356] This embodiment is a variant embodiment of Embodiment 2.

[0357] As Figure 22 shown, the radiofrequency ablation device further includes a ratchet drive unit 800. Among them, the ratchet 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.

[0358] As Figure 13 shown, the guide tube unit 200 further includes at least one sliding element 202. Among them, the sliding element 202 is arranged at the proximal end of the guide tube unit 200, penetrates through the side part of the guide tube unit 200, and is slidably connected to the electrode needle unit 300.

[0359] Specifically, the sliding element 202 is arranged at the proximal end of the guide tube element 201 and penetrates through the side part of the guide tube element 201.

[0360] In some of these embodiments, the sliding element 202 includes, but is not limited to, a sliding slit and a sliding groove.

[0361] As Figure 23 shown, the electrode needle unit 300 further includes at least one third rack element 310. Among them, the third rack element 310 is arranged at the proximal end of the electrode needle unit 300, the distal end of the third rack element 310 is connected to the proximal end of the electrode needle unit 300, and meshes with the ratchet drive unit 800, and is used to drive the electrode needle unit 300 to reciprocate axially along the guide tube unit 200 under the action of the ratchet drive unit 800.

[0362] Specifically, the third rack element 310 is arranged at the proximal end of the electrode needle element 301 (outer needle member), the distal end of the third rack element 310 is connected to the proximal end of the electrode needle element 301, and is slidably connected to the sliding element 202, and is used to drive the electrode needle element 301 to reciprocate axially along the guide tube element 201.

[0363] The connection method between the third rack element 310 and the electrode needle element 301 includes, but is not limited to, bonding, snap connection, etc.

[0364] The number of the third rack elements 310 matches the number of the sliding elements 202. Generally, the number of the third rack elements 310 is equal to the number of the sliding elements 202.

[0365] In some of these embodiments, the third rack element 310 includes a second connecting member and a second tooth condition. Among them, the second 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 outer needle member, and is slidably connected to the sliding element 202; the second tooth condition is disposed at the proximal end of the second connecting member, the distal end of the second tooth condition is connected to the proximal end of the second connecting member, and is meshingly connected to the meshing drive unit 700.

[0366] In some of these embodiments, the second connecting member includes, but is not limited to, a connecting rod.

[0367] In some of these embodiments, the second tooth condition includes, but is not limited to, a rack.

[0368] As Figure 24As shown, the ratchet drive unit 800 includes a fifth control element 801, a fourth rack element 802, a first ratchet element 803, a second ratchet element 804, a third gear element 805, a fourth gear element 806, a fifth gear element 807, a sixth control element 808, and a seventh control element 809. Among them, the fifth control element 801 is movably disposed at the proximal end of the electrode needle unit 300; the fourth rack element 802 is disposed at the end of the fifth control element 801 and is used for reciprocating movement under the action of the fifth control element 801; the first ratchet element 803 is movably disposed at the end of the fifth control element 801 and is removably engaged with the fourth rack element 802 for reciprocating rotation under the action of the fourth rack element 802; the second ratchet element 804 is coaxially disposed with the first ratchet element 803, cooperates with the first ratchet element 803, and is removably engaged with the fourth rack element 802 for rotating in the first direction under the action of the first ratchet element 803 or rotating in the second direction under the action of the fourth rack element 802; the third gear element 805 is coaxially disposed with the second ratchet element 804 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 804; the fourth gear element 806 is engaged with the third gear element 805 for rotating under the action of the third gear element 805; the fifth gear element 807 is coaxially disposed with the fourth gear element 806 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 806; the sixth control element 808 is movably disposed on the first side of the ratchet drive unit 800 and abuts against the first side of the third gear element 805 and the first side of the fifth gear element 807 respectively, for moving along the axial direction of the third gear element 805 to separate the third gear element 805 from the electrode needle unit 300 and moving along the axial direction of the fifth gear element 807 to engage the fifth gear element 807 with the electrode needle unit 300; the seventh control element 809 is movably disposed on the second side of the ratchet drive unit 800 and abuts against the second side of the third gear element 805 and the second side of the fifth gear element 807 respectively, for moving along the axial direction of the third gear element 805 to engage the third gear element 805 with the electrode needle unit 300 and moving along the axial direction of the fifth gear element 807 to separate the fifth gear element 807 from the electrode needle unit 300.

[0369] Specifically, the fifth control element 801 is movably arranged at the proximal end of the electrode needle element 301; the third gear element 805 is removably engaged with the third rack element 310 for driving the electrode needle element 301 to move axially and unidirectionally along the guide tube element 201 through the third rack element 310; the fifth gear element 807 is removably engaged with the third rack element 310 for driving the electrode needle element 301 to move axially and unidirectionally along the guide tube element 201 through the third rack element 310; the sixth control element 808 is movably arranged on the first side of the electrode needle element 301 for moving axially along the third gear element 805 to separate the third gear element 805 from the third rack element 310 and moving axially along the fifth gear element 807 to engage the fifth gear element 807 with the third rack element 310; the seventh control element 809 is movably arranged on the second side of the electrode needle element 301 for moving axially along the third gear element 805 to engage the third gear element 805 with the third rack element 310 and moving axially along the fifth gear element 807 to separate the fifth gear element 807 from the third rack element 310.

[0370] The working principle of the ratchet drive unit 800 is to convert rotational motion into linear motion so that the electrode needle element 301 can perform linear reciprocating motion.

[0371] The fifth control element 801 is rotatably arranged at the proximal end of the electrode needle element 301.

[0372] In some of these embodiments, the fifth control element 801 includes, but is not limited to, a control trigger.

[0373] The fourth rack element 802 is arranged at the top of the fifth control element 801 for reciprocating rotation under the action of the fifth control element 801.

[0374] The cross-section of the fourth rack element 802 is arc-shaped. Specifically, the middle of the fourth rack element 802 is higher than the two ends of the fourth rack element 802.

[0375] In some of these embodiments, the fourth rack element 802 includes, but is not limited to, a rack.

[0376] In some of these embodiments, the first ratchet element 803 includes, but is not limited to, a ratchet gear.

[0377] The second ratchet element 804 is sleeved with the first ratchet element 803 and cooperates therewith. Specifically as follows:

[0378] 1) When the first ratchet element 803 meshes with the fourth rack element 802 and the second ratchet element 804 is separated from the fourth rack element 802, when the first ratchet element 803 rotates in the first direction, the second ratchet element 804 rotates following the first ratchet element 803; when the first ratchet element 803 rotates in the second direction, due to the one-way cooperation, the second ratchet element 804 does not rotate following the first ratchet element 803. That is, the fifth control element 801 cannot drive the first ratchet element 803 to rotate in the second direction.

[0379] 2) When the first ratchet element 803 is separated from the fourth rack element 802 and the second ratchet element 804 meshes with the fourth rack element 802, when the second ratchet element 804 rotates in the second direction, the first ratchet element 803 rotates following the second ratchet element 804; when the second ratchet element 804 rotates in the first direction, due to the one-way cooperation, the first ratchet element 803 does not rotate following the second ratchet element 804. That is, the fifth control element 801 cannot drive the second ratchet element 804 to rotate in the first direction.

[0380] In some of these embodiments, the second ratchet element 804 includes, but is not limited to, a ratchet gear.

[0381] The third gear element 805 and the second ratchet element 804 can be detachably connected or fixedly connected. For example, snap connection, integrally formed, etc.

[0382] The size of the third gear element 805 matches the size of the second ratchet element 804. Generally, the radial size of the third gear element 805 is larger than the radial size of the second ratchet element 804.

[0383] The number of the third gear elements 805 matches the number of the third rack elements 310. Generally, the number of the third gear elements 805 is equal to the number of the third rack elements 310.

[0384] In some of these embodiments, the third gear element 805 includes, but is not limited to, a gear.

[0385] The size of the fourth gear element 806 matches the size of the third gear element 805. Generally, the radial size of the fourth gear element 806 is smaller than the radial size of the third gear element 805.

[0386] In some of these embodiments, the fourth gear element 806 includes, but is not limited to, a gear.

[0387] The size of the fifth gear element 807 matches the size of the fourth gear element 806. Generally, the radial size of the fifth gear element 807 is larger than the radial size of the fourth gear element 806.

[0388] The size of the fifth gear element 807 matches the size of the third gear element 805. Generally, the radial size of the fifth gear element 807 is equal to the radial size of the third gear element 805.

[0389] In some of these embodiments, the fifth gear element 807 includes, but is not limited to, a gear.

[0390] In some of these embodiments, the sixth control element 808 includes, but is not limited to, a control button.

[0391] In some of these embodiments, the seventh control element 809 includes, but is not limited to, a control button.

[0392] Furthermore, the ratchet drive unit 800 further includes a sixth rotating element 810. Among them, the sixth rotating element 810 is connected to the fifth control element 801 and is used to rotate the fifth control element 801.

[0393] The sixth rotating element 810 is arranged in the middle of the fifth control element 801. For example, the sixth rotating element 810 is arranged close to the fourth rack element 802.

[0394] By using the sixth rotating element 810, the fifth control element 801 can be rotated about the axis of the sixth rotating element 810, thereby defining the rotation center of the fifth control element 801.

[0395] The sixth rotating element 810 and the fifth control element 801 can be detachably connected or fixedly connected. For example, plugging, integral molding, etc.

[0396] In some of these embodiments, the sixth rotating element 810 includes, but is not limited to, a rotating shaft.

[0397] Furthermore, the ratchet drive unit 800 further includes a seventh rotating element 811. Among them, the seventh rotating element 811 is connected to the first ratchet element 803, the second ratchet element 804, and the third gear element 805 and is used to rotate the first ratchet element 803, the second ratchet element 804, and the third gear element 805.

[0398] The seventh rotating element 811 is coaxially arranged with the first ratchet element 803, the second ratchet element 804, and the third gear element 805.

[0399] By using the seventh rotating element 811, the first ratchet element 803, the second ratchet element 804, and the third gear element 805 can be rotated about the axis of the seventh rotating element 811, thereby defining the rotation center of the first ratchet element 803, the second ratchet element 804, and the third gear element 805.

[0400] The seventh rotating element 811 can be detachably connected or fixedly connected to the first ratchet element 803, the second ratchet element 804, and the third gear element 805. For example, plugging, integrally molding, etc.

[0401] In some of these embodiments, the seventh rotating element 811 includes, but is not limited to, a rotating shaft.

[0402] Further, the ratchet driving unit 800 further includes an eighth rotating element 812. Wherein, the eighth rotating element 812 is connected to the fourth gear element 806 and the fifth gear element 807, and is used to rotate the fourth gear element 806 and the fifth gear element 807.

[0403] The eighth rotating element 812 is coaxially arranged with the fourth gear element 806 and the fifth gear element 807.

[0404] By using the eighth rotating element 812, the fourth gear element 806 and the fifth gear element 807 can rotate about the axis of the eighth rotating element 812, thereby defining the rotation centers of the fourth gear element 806 and the fifth gear element 807.

[0405] The eighth rotating element 812 can be detachably connected or fixedly connected to the fourth gear element 806 and the fifth gear element 807. For example, plugging, integrally molding, etc.

[0406] In some of these embodiments, the eighth rotating element 812 includes, but is not limited to, a rotating shaft.

[0407] Further, the ratchet driving unit 800 further includes at least one third limiting element 813. Wherein, the third limiting element 813 is arranged on the side of the sixth control element 808 and abuts against the first side of the third gear element 805, and is used to move axially along the third gear element 805 under the action of the sixth control element 808 so that the third gear element 805 is separated from the electrode needle unit 300.

[0408] The third limiting element 813 can be detachably connected or fixedly connected to the sixth control element 808. For example, plugging, integrally molding, etc.

[0409] In some of these embodiments, there are several third limiting elements 813. The several third limiting elements 813 are arranged at intervals along the length direction and / or the height direction of the sixth control element 808.

[0410] In some of these embodiments, the third limiting element 813 includes, but is not limited to, a limiting rod.

[0411] Further, the ratchet driving unit 800 further includes at least one fourth limiting element 814. The fourth limiting element 814 is disposed on the side of the sixth control element 808 and abuts against the first side of the fifth gear element 807, and is used to move axially along the fifth gear element 807 under the action of the sixth control element 808 so that the fifth gear element 807 meshes with the electrode needle unit 300.

[0412] The fourth limiting element 814 and the sixth control element 808 can be detachably connected or fixedly connected. For example, plugging, integral molding, etc.

[0413] In some embodiments, there are a plurality of fourth limiting elements 814. The plurality of fourth limiting elements 814 are spaced along the length direction and / or the height direction of the sixth control element 808.

[0414] In some embodiments, the fourth limiting element 814 includes, but is not limited to, a limiting rod.

[0415] Further, the ratchet driving unit 800 further includes at least one fifth limiting element 815. The fifth limiting element 815 is disposed on the side of the seventh control element 809 and abuts against the second side of the third gear element 805, and is used to move axially along the third gear element 805 under the action of the seventh control element 809 so that the third gear element 805 meshes with the electrode needle unit 300.

[0416] The fifth limiting element 815 and the seventh control element 809 can be detachably connected or fixedly connected. For example, plugging, integral molding, etc.

[0417] In some embodiments, there are a plurality of fifth limiting elements 815. The plurality of fifth limiting elements 815 are spaced along the length direction and / or the height direction of the seventh control element 809.

[0418] In some embodiments, the fifth limiting element 815 includes, but is not limited to, a limiting rod.

[0419] Further, the ratchet driving unit 800 further includes at least one sixth limiting element 816. The sixth limiting element 816 is disposed on the side of the seventh control element 809 and abuts against the second side of the fifth gear element 807, and is used to move axially along the fifth gear element 807 under the action of the seventh control element 809 so that the fifth gear element 807 is separated from the electrode needle unit 300.

[0420] The sixth limiting element 816 and the seventh control element 809 can be detachably connected or fixedly connected. For example, plugging, integral molding, etc.

[0421] In some of these embodiments, there are several sixth limiting elements 816. The several sixth limiting elements 816 are arranged at intervals along the length direction and / or the height direction of the seventh control element 809.

[0422] In some of these embodiments, the sixth limiting element 816 includes but is not limited to a limiting rod.

[0423] Furthermore, the ratchet drive unit 800 further includes a reset element 817. Wherein, the reset element 817 is arranged at the proximal end of the fifth control element 801 for resetting the fifth control element 801.

[0424] In some of these embodiments, the reset element 817 includes but is not limited to a reset reed, a reset spring, etc.

[0425] The usage method of the present invention is as follows:

[0426] Penetrate the sheath element 101 through the cortical bone and drive it into the cancellous bone;

[0427] Insert the guiding tube element 201 and the electrode needle element 301 into the sheath element 101. At this time, the distal end of the electrode needle element 301 is flush with the distal end of the guiding tube element 201;

[0428] Push the seventh control element 809 to make the first ratchet element 803 engage with the fourth rack element 802, the second ratchet element 804 separate from the fourth rack element 802, the third gear element 805 engage with the third rack element 310, and the fifth gear element 807 separate from the third rack element 310;

[0429] Expose the distal end of the guiding tube element 201 through the opening element 102, and rotate the fifth control element 801 in the first direction (such as the clockwise direction). Under the cooperation of the fourth rack element 802 and the first ratchet element 803, and the cooperation between the first ratchet element 803 and the second ratchet element 804, the third gear element 805 rotates in the first direction. Under the cooperation of the third gear element 805 and the third rack element 310, the third rack element 310 drives the distal end of the electrode needle element 301 away from the guiding tube element 201 and reaches the radiofrequency ablation position;

[0430] 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;

[0431] After the radiofrequency ablation operation is completed, the sixth control element 808 is pushed to separate the first ratchet element 803 from the fourth rack element 802, engage the second ratchet element 804 with the fourth rack element 802, separate the third gear element 805 from the third rack element 310, and engage the fifth gear element 807 with the third rack element 310;

[0432] The fifth control element 801 is pressed in the second direction (such as the counterclockwise direction). With the cooperation of the fourth rack element 802 and the second ratchet element 804, and the third gear element 805 and the fourth gear element 806, the fifth gear element 807 rotates in the second direction. With the cooperation of the fifth gear element 807 and the third rack element 310, the third rack element 310 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;

[0433] The guide tube element 201, the electrode needle element 301 and the sheath element 101 are separated, and finally the sheath element 101 is removed.

[0434] The technical effects of the present invention are as follows: By using the ratchet drive cooperation between the ratchet drive unit and the electrode needle unit, the moving speed and moving position of the electrode needle unit can be accurately controlled, which is convenient for accurately controlling the electrode needle unit.

[0435] Embodiment 8

[0436] This embodiment is a variant embodiment of Embodiment 4.

[0437] As Figure 12 shown, the radiofrequency ablation device further includes a handle unit 900. Among them, the handle unit 900 is respectively connected to the guide tube unit 200 and the electric drive unit 500 for fixing the guide tube unit 200 and the electric drive unit 500.

[0438] As Figure 25 shown, the handle unit 900 includes a first handle element 901, a first outlet element 902, a second handle element 903 and a second outlet element 904. Among them, the first outlet element 902 is arranged at the distal end of the first handle element 901 and is connected to the guide tube unit 200; the second handle element 903 is arranged at the side of the first handle element 901 and is connected to the first handle element 901; the second outlet element 904 is arranged at the distal end of the second handle element 903 and is respectively connected to the first outlet element 902 and the guide tube unit 200.

[0439] Specifically, the proximal end of the first handle element 901 is connected to the second control element 501. Inside the first handle element 901, there are provided a guide tube element 201, an electrode needle element 301, a first link element 305, a first movable element 306, and a second movable element 502; the first outlet element 902 is connected to the guide tube element 201; the proximal end of the second handle element 903 is connected to the second control element 501. Inside the second handle element 903, there are provided a guide tube element 201, an electrode needle element 301, a first link element 305, a first movable element 306, and a second movable element 502; the second outlet element 904 is connected to the guide tube element 201.

[0440] In some of these embodiments, the first handle element 901 includes, but is not limited to, a gun-shaped half handle.

[0441] The connection manner between the first outlet element 902 and the guide tube element 201 includes, but is not limited to, snap connection, bonding, etc.

[0442] In some of these embodiments, the first outlet element 902 includes, but is not limited to, a fixed port.

[0443] The second handle element 903 is detachably connected to the first handle element 901, for example, by plugging, bolt connection, etc.

[0444] In some of these embodiments, the second handle element 903 and the first handle element 901 are designed to be mirror-symmetrical, that is, the shape, length, width, and height of the second handle element 903 are the same as those of the first handle element 901.

[0445] In some of these embodiments, the second handle element 903 includes, but is not limited to, a gun-shaped half handle.

[0446] The connection manner between the second outlet element 904 and the guide tube element 201 includes, but is not limited to, snap connection, bonding, etc.

[0447] In some of these embodiments, the second outlet element 904 and the first outlet element 902 are designed to be mirror-symmetrical, that is, the shape, length, width, and height of the second outlet element 904 are the same as those of the first outlet element 902.

[0448] In some of these embodiments, the second outlet element 904 includes, but is not limited to, a fixed port.

[0449] Further, the handle unit 900 further includes a seventh limiting element 905. Wherein, the seventh limiting element 905 is disposed inside the first handle element 901 and abuts against the proximal end of the electrode needle unit 300, for limiting the upper side of the electrode needle unit 300.

[0450] Specifically, the seventh limiting element 905 abuts against the upper side of the first link element 305 for limiting the upper side of the first link element 305.

[0451] The purpose of setting the seventh limiting element 905 is to limit the displacement of the first link element 305 in the up-down direction, ensuring that the first link element 305 can only move in the front-back direction.

[0452] In some embodiments, the seventh limiting element 905 includes, but is not limited to, a limiting plate.

[0453] Further, the handle unit 900 further includes an eighth limiting element 906. Among them, the eighth limiting element 906 is disposed inside the second handle element 903 and abuts against the proximal end of the electrode needle unit 300 for limiting the upper side of the electrode needle unit 300.

[0454] Specifically, the eighth limiting element 906 abuts against the upper side of the first link element 305 for limiting the upper side of the first link element 305.

[0455] The purpose of setting the eighth limiting element 906 is to limit the displacement of the first link element 305 in the up-down direction, ensuring that the first link element 305 can only move in the front-back direction.

[0456] The eighth limiting element 906 and the seventh limiting element 905 may be in contact and connected (such as snap-connected), or may not be in contact.

[0457] In some embodiments, the eighth limiting element 906 includes, but is not limited to, a limiting plate.

[0458] Further, the handle unit 900 further includes a ninth limiting element 907. Among them, the ninth limiting element 907 is disposed inside the first handle element 901 and abuts against the proximal end of the electrode needle unit 300 for limiting the lower side of the electrode needle unit 300.

[0459] Specifically, the ninth limiting element 907 abuts against the lower side of the first link element 305 for limiting the lower side of the first link element 305.

[0460] The purpose of setting the ninth limiting element 907 is to limit the displacement of the first link element 305 in the up-down direction, ensuring that the first link element 305 can only move in the front-back direction.

[0461] In some embodiments, the ninth limiting element 907 includes, but is not limited to, a limiting plate.

[0462] Further, the handle unit 900 further includes a tenth limiting element 908. The tenth limiting element 908 is disposed inside the second handle element 903 and abuts against the proximal end of the electrode needle unit 300 for limiting the lower side of the electrode needle unit 300.

[0463] Specifically, the tenth limiting element 908 abuts against the upper side of the first link element 305 for limiting the lower side of the first link element 305.

[0464] The purpose of setting the tenth limiting element 908 is to limit the displacement of the first link element 305 in the up and down directions, ensuring that the first link element 305 can only move in the front and back directions.

[0465] The tenth limiting element 908 and the ninth limiting element 907 may be in contact and connected (such as snap-connected), or may not be in contact.

[0466] In some of the embodiments, the tenth limiting element 908 includes, but is not limited to, a limiting plate.

[0467] Further, the handle unit 900 further includes a ninth rotating element 909. The ninth rotating element 909 is disposed on the first handle element 901 and connected to the electric drive unit 500.

[0468] Specifically, the ninth rotating element 909 is rotatably connected to the first rotating element 503 and abuts against the first limiting element 505.

[0469] The purpose of setting the ninth rotating element 909 is to assist the second movable element 502 in rotating.

[0470] In some of the embodiments, the ninth rotating element 909 includes, but is not limited to, a rotating seat.

[0471] Further, the handle unit 900 further includes a tenth rotating element 910. The tenth rotating element 910 is disposed on the second handle element 903 and connected to the electric drive unit 500.

[0472] Specifically, the tenth rotating element 910 is rotatably connected to the first rotating element 503 and abuts against the first limiting element 505.

[0473] The purpose of setting the tenth rotating element 910 is to assist the second movable element 502 in rotating.

[0474] The tenth rotating element 910 and the ninth rotating element 909 may be in contact and connected (such as snap-connected), or may not be in contact.

[0475] In some of the embodiments, the tenth rotating element 910 includes, but is not limited to, a rotating seat.

[0476] Further, the handle unit 900 further includes an eleventh rotating element 911. The eleventh rotating element 911 is disposed on the first handle element 901 and is connected to the electric drive unit 500.

[0477] Specifically, the eleventh rotating element 911 is rotatably connected to the second rotating element 504 and abuts against the second limiting element 506.

[0478] The purpose of setting the eleventh rotating element 911 is to assist the second movable element 502 in rotating.

[0479] In some of these embodiments, the eleventh rotating element 911 includes, but is not limited to, a rotating base.

[0480] Further, the handle unit 900 further includes a twelfth rotating element 912. The twelfth rotating element 912 is disposed on the second handle element 903 and is connected to the electric drive unit 500.

[0481] Specifically, the twelfth rotating element 912 is rotatably connected to the second rotating element 504 and abuts against the second limiting element 506.

[0482] The purpose of setting the twelfth rotating element 912 is to assist the second movable element 502 in rotating.

[0483] The twelfth rotating element 912 and the eleventh rotating element 911 may be in contact and connected (such as snap-connected) or may not be in contact.

[0484] In some of these embodiments, the twelfth rotating element 912 includes, but is not limited to, a rotating base.

[0485] The usage method of this embodiment is basically the same as that of Embodiment 3 and will not be elaborated here.

[0486] 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.

[0487] Embodiment 9

[0488] This embodiment is a variant embodiment of Embodiment 5.

[0489] As Figure 16 shown, the radiofrequency ablation device further includes a handle unit 900. The handle unit 900 is respectively connected to the guide tube unit 200 and the link drive unit 600 for fixing the guide tube unit 200 and the link drive unit 600.

[0490] As Figure 26As shown, the handle unit 900 includes a first handle element 901, a first outlet element 902, a second handle element 903, and a second outlet element 904. Among them, the first outlet element 902 is disposed at the distal end of the first handle element 901 and is connected to the guide tube unit 200; the second handle element 903 is disposed at the side of the first handle element 901 and is connected to the first handle element 901; the second outlet element 904 is disposed at the distal end of the second handle element 903 and is respectively connected to the first outlet element 902 and the guide tube unit 200.

[0491] Specifically, the proximal end of the first handle element 901 is connected to the third control element 601. Inside the first handle element 901, there are provided a guide tube element 201, an electrode needle element 301, a second link element 307, a third movable element 308, and a fourth movable element 602; the first outlet element 902 is connected to the guide tube element 201; the proximal end of the second handle element 903 is connected to the third control element 601. Inside the second handle element 903, there are provided a guide tube element 201, an electrode needle element 301, a second link element 307, a third movable element 308, and a fourth movable element 602; the second outlet element 904 is connected to the guide tube element 201.

[0492] In some embodiments, the first handle element 901 includes, but is not limited to, a gun-shaped half handle.

[0493] The connection manner between the first outlet element 902 and the guide tube element 201 includes, but is not limited to, snap connection, bonding, etc.

[0494] In some embodiments, the first outlet element 902 includes, but is not limited to, a fixed port.

[0495] The second handle element 903 is detachably connected to the first handle element 901, such as by plugging, bolt connection, etc.

[0496] In some embodiments, the second handle element 903 and the first handle element 901 are designed to be mirror-symmetrical, that is, the shape, length, width, and height of the second handle element 903 are the same as those of the first handle element 901.

[0497] In some embodiments, the second handle element 903 includes, but is not limited to, a gun-shaped half handle.

[0498] The connection manner between the second outlet element 904 and the guide tube element 201 includes, but is not limited to, snap connection, bonding, etc.

[0499] In some of these embodiments, the second outlet element 904 and the first outlet element 902 are designed to be mirror-symmetrical, that is, the shape, length, width, and height of the second outlet element 904 are the same as those of the first outlet element 902.

[0500] In some of these embodiments, the second outlet element 904 includes, but is not limited to, a fixed port.

[0501] Furthermore, the handle unit 900 further includes a seventh limiting element 905. Among them, the seventh limiting element 905 is disposed inside the first handle element 901 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.

[0502] Specifically, the seventh limiting element 905 abuts against the upper side of the second link element 307 and is used to limit the upper side of the second link element 307.

[0503] The purpose of setting the seventh limiting element 905 is to limit the displacement of the second link element 307 in the up and down directions and ensure that the second link element 307 can only move in the front and back directions.

[0504] In some of these embodiments, the seventh limiting element 905 includes, but is not limited to, a limiting plate.

[0505] Furthermore, the handle unit 900 further includes an eighth limiting element 906. Among them, the eighth limiting element 906 is disposed inside the second handle element 903 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.

[0506] Specifically, the eighth limiting element 906 abuts against the upper side of the second link element 307 and is used to limit the upper side of the second link element 307.

[0507] The purpose of setting the eighth limiting element 906 is to limit the displacement of the second link element 307 in the up and down directions and ensure that the second link element 307 can only move in the front and back directions.

[0508] The eighth limiting element 906 and the seventh limiting element 905 can be in contact and connected (such as snap-connected), or they can be non-contact.

[0509] In some of these embodiments, the eighth limiting element 906 includes, but is not limited to, a limiting plate.

[0510] Furthermore, the handle unit 900 further includes a ninth limiting element 907. Among them, the ninth limiting element 907 is disposed inside the first handle element 901 and abuts against the proximal end of the electrode needle unit 300, and is used to limit the lower side of the electrode needle unit 300.

[0511] Specifically, the ninth limiting element 907 abuts against the lower side of the second link element 307 to limit the lower side of the second link element 307.

[0512] The purpose of setting the ninth limiting element 907 is to limit the displacement of the second link element 307 in the up-down direction, ensuring that the second link element 307 can only move in the front-back direction.

[0513] In some of these embodiments, the ninth limiting element 907 includes, but is not limited to, a limiting plate.

[0514] Furthermore, the handle unit 900 further includes a tenth limiting element 908. Among them, the tenth limiting element 908 is disposed inside the second handle element 903 and abuts against the proximal end of the electrode needle unit 300 to limit the lower side of the electrode needle unit 300.

[0515] Specifically, the tenth limiting element 908 abuts against the upper side of the second link element 307 to limit the lower side of the second link element 307.

[0516] The purpose of setting the tenth limiting element 908 is to limit the displacement of the second link element 307 in the up-down direction, ensuring that the second link element 307 can only move in the front-back direction.

[0517] The tenth limiting element 908 and the ninth limiting element 907 can be in contact and connected (such as snap-connected), or they can be non-contact.

[0518] In some of these embodiments, the tenth limiting element 908 includes, but is not limited to, a limiting plate.

[0519] Furthermore, the handle unit 900 further includes a ninth rotating element 909. Among them, the ninth rotating element 909 is disposed on the first handle element 901 and is connected to the link driving unit 600.

[0520] Specifically, the ninth rotating element 909 is rotatably connected to the third rotating element 603.

[0521] The ninth rotating element 909 and the third rotating element 603 can be detachably connected or fixedly connected. For example, plug-in connection, integral molding, etc.

[0522] The size of the ninth rotating element 909 matches the size of the third rotating element 603. Generally, the radial dimension of the ninth rotating element 909 is equal to the radial dimension of the third rotating element 603.

[0523] In some of these embodiments, the ninth rotating element 909 includes, but is not limited to, a rotating groove.

[0524] Furthermore, the handle unit 900 further includes a tenth rotating element 910. The tenth rotating element 910 is disposed on the second handle element 903 and is connected to the link driving unit 600.

[0525] Specifically, the tenth rotating element 910 is rotatably connected to the third rotating element 603.

[0526] The tenth rotating element 910 and the third rotating element 603 can be detachably connected or fixedly connected. For example, plugging, integral molding, etc.

[0527] The size of the tenth rotating element 910 matches the size of the third rotating element 603. Generally, the radial dimension of the tenth rotating element 910 is equal to the radial dimension of the third rotating element 603.

[0528] In some of these embodiments, the tenth rotating element 910 includes, but is not limited to, a rotating groove.

[0529] The usage method of this embodiment is basically the same as that of Embodiment 4, and will not be elaborated here.

[0530] 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.

[0531] Embodiment 10

[0532] This embodiment is a variant embodiment of Embodiment 6.

[0533] As Figure 19 shown, the radiofrequency ablation device further includes a handle unit 900. The handle unit 900 is respectively connected to the guiding tube unit 200 and the meshing driving unit 700 for fixing the guiding tube unit 200 and the meshing driving unit 700.

[0534] As Figure 27 shown, the handle unit 900 includes a first handle element 901, a first outlet element 902, a second handle element 903, and a second outlet element 904. The first outlet element 902 is disposed at the distal end of the first handle element 901 and is connected to the guiding tube unit 200; the second handle element 903 is disposed on the side of the first handle element 901 and is connected to the first handle element 901; the second outlet element 904 is disposed at the distal end of the second handle element 903 and is respectively connected to the first outlet element 902 and the guiding tube unit 200.

[0535] Specifically, the proximal end of the first handle element 901 is connected to the fourth control element 701. Inside the first handle element 901, there are a guide tube element 201, an electrode needle element 301, a first rack element 309, a second rack element 702, a first gear element 703, and a second gear element 704; the first outlet element 902 is connected to the guide tube element 201; the proximal end of the second handle element 903 is connected to the fourth control element 701. Inside the second handle element 903, there are a guide tube element 201, an electrode needle element 301, a first rack element 309, a first rack element 309, a second rack element 702, a first gear element 703, and a second gear element 704; the second outlet element 904 is connected to the guide tube element 201.

[0536] In some embodiments, the first handle element 901 includes, but is not limited to, a gun-shaped semi-handle.

[0537] The connection manner between the first outlet element 902 and the guide tube element 201 includes, but is not limited to, snap connection, bonding, etc.

[0538] In some embodiments, the first outlet element 902 includes, but is not limited to, a fixed port.

[0539] The second handle element 903 is detachably connected to the first handle element 901, for example, by plugging, bolt connection, etc.

[0540] In some embodiments, the second handle element 903 and the first handle element 901 are designed to be mirror-symmetrical, that is, the shape, length, width, and height of the second handle element 903 are the same as those of the first handle element 901.

[0541] In some embodiments, the second handle element 903 includes, but is not limited to, a gun-shaped semi-handle.

[0542] The connection manner between the second outlet element 904 and the guide tube element 201 includes, but is not limited to, snap connection, bonding, etc.

[0543] In some embodiments, the second outlet element 904 and the first outlet element 902 are designed to be mirror-symmetrical, that is, the shape, length, width, and height of the second outlet element 904 are the same as those of the first outlet element 902.

[0544] In some embodiments, the second outlet element 904 includes, but is not limited to, a fixed port.

[0545] Further, the handle unit 900 further includes a seventh limiting element 905. The seventh limiting element 905 is disposed inside the first handle element 901 and abuts against the proximal end of the electrode needle unit 300 for limiting the upper side of the electrode needle unit 300.

[0546] Specifically, the seventh limiting element 905 abuts against the upper side of the first rack element 309 for limiting the upper side of the first rack element 309.

[0547] The purpose of setting the seventh limiting element 905 is to limit the displacement of the first rack element 309 in the up and down directions, ensuring that the first rack element 309 can only move in the front and back directions.

[0548] In some embodiments, the seventh limiting element 905 includes, but is not limited to, a limiting plate.

[0549] Further, the handle unit 900 further includes an eighth limiting element 906. The eighth limiting element 906 is disposed inside the second handle element 903 and abuts against the proximal end of the electrode needle unit 300 for limiting the upper side of the electrode needle unit 300.

[0550] Specifically, the eighth limiting element 906 abuts against the upper side of the first rack element 309 for limiting the upper side of the first rack element 309.

[0551] The purpose of setting the eighth limiting element 906 is to limit the displacement of the first rack element 309 in the up and down directions, ensuring that the first rack element 309 can only move in the front and back directions.

[0552] The eighth limiting element 906 and the seventh limiting element 905 may be in contact and connected (such as snap-connected), or may not be in contact.

[0553] In some embodiments, the eighth limiting element 906 includes, but is not limited to, a limiting plate.

[0554] Further, the handle unit 900 further includes a ninth limiting element 907. The ninth limiting element 907 is disposed inside the first handle element 901 and abuts against the proximal end of the electrode needle unit 300 for limiting the lower side of the electrode needle unit 300.

[0555] Specifically, the ninth limiting element 907 abuts against the lower side of the first rack element 309 for limiting the lower side of the first rack element 309.

[0556] The purpose of setting the ninth limiting element 907 is to limit the displacement of the first rack element 309 in the up and down directions, ensuring that the first rack element 309 can only move in the front and back directions.

[0557] In some of these embodiments, the ninth limiting element 907 includes, but is not limited to, a limiting plate.

[0558] Furthermore, the handle unit 900 further includes a tenth limiting element 908. Wherein, the tenth limiting element 908 is disposed inside the second handle element 903 and abuts against the proximal end of the electrode needle unit 300 for limiting the lower side of the electrode needle unit 300.

[0559] Specifically, the tenth limiting element 908 abuts against the upper side of the first rack element 309 for limiting the lower side of the first rack element 309.

[0560] The purpose of setting the tenth limiting element 908 is to limit the displacement of the first rack element 309 in the up and down directions, ensuring that the first rack element 309 can only move in the front and back directions.

[0561] The tenth limiting element 908 and the ninth limiting element 907 may be in contact and connected (such as snap-connected), or may not be in contact.

[0562] In some of these embodiments, the tenth limiting element 908 includes, but is not limited to, a limiting plate.

[0563] Furthermore, the handle unit 900 further includes a ninth rotating element 909. Wherein, the ninth rotating element 909 is disposed on the first handle element 901 and is connected to the meshing drive unit 700.

[0564] Specifically, the ninth rotating element 909 is rotatably connected to the fourth rotating element 705.

[0565] The ninth rotating element 909 and the fourth rotating element 705 may be detachably connected or fixedly connected. For example, plug-in connection, integrally formed, etc.

[0566] The size of the ninth rotating element 909 matches the size of the fourth rotating element 705. Generally, the radial dimension of the ninth rotating element 909 is equal to the radial dimension of the fourth rotating element 705.

[0567] In some of these embodiments, the ninth rotating element 909 includes, but is not limited to, a rotating groove.

[0568] Furthermore, the handle unit 900 further includes a tenth rotating element 910. Wherein, the tenth rotating element 910 is disposed on the second handle element 903 and is connected to the meshing drive unit 700.

[0569] Specifically, the tenth rotating element 910 is rotatably connected to the fourth rotating element 705.

[0570] The tenth rotating element 910 and the fourth rotating element 705 can be detachably connected or fixedly connected. For example, plugging, integral molding, etc.

[0571] The size of the tenth rotating element 910 matches the size of the fourth rotating element 705. Generally, the radial dimension of the tenth rotating element 910 is equal to the radial dimension of the fourth rotating element 705.

[0572] In some of these embodiments, the tenth rotating element 910 includes, but is not limited to, a rotating groove.

[0573] Furthermore, the handle unit 900 further includes a thirteenth rotating element 913. Among them, the thirteenth rotating element 913 is disposed on the first handle element 901 and is connected to the meshing drive unit 700.

[0574] Specifically, the thirteenth rotating element 913 is connected to the fifth rotating element 706.

[0575] The thirteenth rotating element 913 and the fifth rotating element 706 can be detachably connected or fixedly connected. For example, plugging, integral molding, etc.

[0576] The size of the thirteenth rotating element 913 matches the size of the fifth rotating element 706. Generally, the radial dimension of the thirteenth rotating element 913 is equal to the radial dimension of the fifth rotating element 706.

[0577] In some of these embodiments, the thirteenth rotating element 913 includes, but is not limited to, a rotating groove.

[0578] Furthermore, the handle unit 900 further includes a fourteenth rotating element 914. Among them, the fourteenth rotating element 914 is disposed on the second handle element 903 and is connected to the meshing drive unit 700.

[0579] Specifically, the fourteenth rotating element 914 is connected to the fifth rotating element 706.

[0580] The fourteenth rotating element 914 and the fifth rotating element 706 can be detachably connected or fixedly connected. For example, plugging, integral molding, etc.

[0581] The size of the fourteenth rotating element 914 matches the size of the fifth rotating element 706. Generally, the radial dimension of the fourteenth rotating element 914 is equal to the radial dimension of the fifth rotating element 706.

[0582] In some of these embodiments, the fourteenth rotating element 914 includes, but is not limited to, a rotating groove.

[0583] The usage method of this embodiment is basically the same as that of Embodiment 5, and will not be elaborated here.

[0584] 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.

[0585] Embodiment 11

[0586] This embodiment is a variant embodiment of Embodiment 7.

[0587] As Figure 22 shown, the radiofrequency ablation device further includes a handle unit 900. The handle unit 900 is respectively connected to the guide tube unit 200 and the ratchet drive unit 800, and is used to fix the guide tube unit 200 and the ratchet drive unit 800.

[0588] As Figure 28 shown, the handle unit 900 includes a first handle element 901, a first outlet element 902, a second handle element 903, and a second outlet element 904. Among them, the first outlet element 902 is arranged at the distal end of the first handle element 901 and is connected to the guide tube unit 200; the second handle element 903 is arranged at the side of the first handle element 901 and is connected to the first handle element 901; the second outlet element 904 is arranged at the distal end of the second handle element 903 and is respectively connected to the first outlet element 902 and the guide tube unit 200.

[0589] Specifically, the proximal end of the first handle element 901 is connected to the fifth control element 801, the side of the first handle element 901 is slidably connected to the sixth control element 808, and the inside of the first handle element 901 is provided with a guide tube element 201, an electrode needle element 301, a third rack element 310, a fourth rack element 802, a first ratchet element 803, a second ratchet element 804, a third gear element 805, a fourth gear element 806, and a fifth gear element 807; the first outlet element 902 is connected to the guide tube element 201; the proximal end of the second handle element 903 is connected to the fifth control element 801, the proximal end of the second handle element 903 is connected to the fifth control element 801, the side of the second handle element 903 is slidably connected to the seventh control element 809, and the inside of the second handle element 903 is provided with a guide tube element 201, an electrode needle element 301, a third rack element 310, a fourth rack element 802, a first ratchet element 803, a second ratchet element 804, a third gear element 805, a fourth gear element 806, and a fifth gear element 807; the second outlet element 904 is connected to the guide tube element 201.

[0590] In some of these embodiments, the first handle element 901 includes, but is not limited to, a gun-shaped half handle.

[0591] The connection method between the first outlet element 902 and the guide tube element 201 includes, but is not limited to, snap connection, bonding, etc.

[0592] In some of these embodiments, the first outlet element 902 includes, but is not limited to, a fixed port.

[0593] The second handle element 903 is detachably connected to the first handle element 901, for example, by plugging, bolting, etc.

[0594] In some of these embodiments, the second handle element 903 and the first handle element 901 are mirror-symmetrically designed, that is, the shape, length, width, and height of the second handle element 903 are the same as those of the first handle element 901.

[0595] In some of these embodiments, the second handle element 903 includes, but is not limited to, a gun-shaped half handle.

[0596] The connection mode between the second outlet element 904 and the guide tube element 201 includes, but is not limited to, snap connection, bonding, etc.

[0597] In some of these embodiments, the second outlet element 904 and the first outlet element 902 are mirror-symmetrically designed, that is, the shape, length, width, and height of the second outlet element 904 are the same as those of the first outlet element 902.

[0598] In some of these embodiments, the second outlet element 904 includes, but is not limited to, a fixed port.

[0599] Furthermore, the handle unit 900 further includes a seventh limiting element 905. Among them, the seventh limiting element 905 is disposed inside the first handle element 901 and abuts against the proximal end of the electrode needle unit 300 for limiting the upper side of the electrode needle unit 300.

[0600] Specifically, the seventh limiting element 905 abuts against the upper side of the third rack element 310 for limiting the upper side of the third rack element 310.

[0601] The purpose of setting the seventh limiting element 905 is to limit the displacement of the third rack element 310 in the up and down directions, ensuring that the third rack element 310 can only move in the front and back directions.

[0602] In some of these embodiments, the seventh limiting element 905 includes, but is not limited to, a limiting plate.

[0603] Furthermore, the handle unit 900 further includes an eighth limiting element 906. Among them, the eighth limiting element 906 is disposed inside the second handle element 903 and abuts against the proximal end of the electrode needle unit 300 for limiting the upper side of the electrode needle unit 300.

[0604] Specifically, the eighth limiting element 906 abuts against the upper side of the third rack element 310 for limiting the upper side of the third rack element 310.

[0605] The purpose of setting the eighth limiting element 906 is to limit the displacement of the third rack element 310 in the up and down directions, ensuring that the third rack element 310 can only move in the front and back directions.

[0606] The eighth limiting element 906 and the seventh limiting element 905 may be in contact and connected (such as snap-connected), or may not be in contact.

[0607] In some of these embodiments, the eighth limiting element 906 includes, but is not limited to, a limiting plate.

[0608] Further, the handle unit 900 further includes a ninth limiting element 907. Among them, the ninth limiting element 907 is disposed inside the first handle element 901 and abuts against the proximal end of the electrode needle unit 300 for limiting the lower side of the electrode needle unit 300.

[0609] Specifically, the ninth limiting element 907 abuts against the lower side of the third rack element 310 for limiting the lower side of the third rack element 310.

[0610] The purpose of setting the ninth limiting element 907 is to limit the displacement of the third rack element 310 in the up and down directions, ensuring that the third rack element 310 can only move in the front and back directions.

[0611] In some of these embodiments, the ninth limiting element 907 includes, but is not limited to, a limiting plate.

[0612] Further, the handle unit 900 further includes a tenth limiting element 908. Among them, the tenth limiting element 908 is disposed inside the second handle element 903 and abuts against the proximal end of the electrode needle unit 300 for limiting the lower side of the electrode needle unit 300.

[0613] Specifically, the tenth limiting element 908 abuts against the upper side of the third rack element 310 for limiting the lower side of the third rack element 310.

[0614] The purpose of setting the tenth limiting element 908 is to limit the displacement of the third rack element 310 in the up and down directions, ensuring that the third rack element 310 can only move in the front and back directions.

[0615] The tenth limiting element 908 and the ninth limiting element 907 may be in contact and connected (such as snap-connected), or may not be in contact.

[0616] In some of these embodiments, the tenth limiting element 908 includes, but is not limited to, a limiting plate.

[0617] Further, the handle unit 900 further includes a ninth rotating element 909. The ninth rotating element 909 is disposed on the first handle element 901 and is connected to the ratchet driving unit 800.

[0618] Specifically, the ninth rotating element 909 is rotatably connected to the sixth rotating element 810.

[0619] The ninth rotating element 909 and the sixth rotating element 810 can be detachably connected or fixedly connected. For example, plugging, integrally molding, etc.

[0620] The size of the ninth rotating element 909 matches the size of the sixth rotating element 810. Generally, the radial dimension of the ninth rotating element 909 is equal to the radial dimension of the sixth rotating element 810.

[0621] In some embodiments, the ninth rotating element 909 includes, but is not limited to, a rotating groove.

[0622] Further, the handle unit 900 further includes a tenth rotating element 910. The tenth rotating element 910 is disposed on the second handle element 903 and is connected to the ratchet driving unit 800.

[0623] Specifically, the tenth rotating element 910 is rotatably connected to the sixth rotating element 810.

[0624] The tenth rotating element 910 and the sixth rotating element 810 can be detachably connected or fixedly connected. For example, plugging, integrally molding, etc.

[0625] The size of the tenth rotating element 910 matches the size of the sixth rotating element 810. Generally, the radial dimension of the tenth rotating element 910 is equal to the radial dimension of the sixth rotating element 810.

[0626] In some embodiments, the tenth rotating element 910 includes, but is not limited to, a rotating groove.

[0627] Further, the handle unit 900 further includes an eleventh rotating element 911. The eleventh rotating element 911 is disposed on the first handle element 901 and is connected to the ratchet driving unit 800.

[0628] Specifically, the eleventh rotating element 911 is connected to the seventh rotating element 811.

[0629] The eleventh rotating element 911 and the seventh rotating element 811 can be detachably connected or fixedly connected. For example, plugging, integrally molding, etc.

[0630] The size of the eleventh rotating element 911 matches the size of the seventh rotating element 811. Generally, the radial size of the eleventh rotating element 911 is equal to the radial size of the seventh rotating element 811.

[0631] In some of these embodiments, the eleventh rotating element 911 includes, but is not limited to, a rotating groove.

[0632] Furthermore, the handle unit 900 further includes a twelfth rotating element 912. Among them, the twelfth rotating element 912 is disposed on the second handle element 903 and is connected to the ratchet driving unit 800.

[0633] Specifically, the twelfth rotating element 912 is connected to the seventh rotating element 811.

[0634] The twelfth rotating element 912 and the seventh rotating element 811 can be detachably connected or fixedly connected. For example, plugging, integrally forming, etc.

[0635] The size of the twelfth rotating element 912 matches the size of the seventh rotating element 811. Generally, the radial size of the twelfth rotating element 912 is equal to the radial size of the seventh rotating element 811.

[0636] In some of these embodiments, the twelfth rotating element 912 includes, but is not limited to, a rotating groove.

[0637] Furthermore, the handle unit 900 further includes a thirteenth rotating element 913. Among them, the thirteenth rotating element 913 is disposed on the first handle element 901 and is connected to the ratchet driving unit 800.

[0638] Specifically, the thirteenth rotating element 913 is rotatably connected to the eighth rotating element 812.

[0639] The thirteenth rotating element 913 and the eighth rotating element 812 can be detachably connected or fixedly connected. For example, plugging, integrally forming, etc.

[0640] The size of the thirteenth rotating element 913 matches the size of the eighth rotating element 812. Generally, the radial size of the thirteenth rotating element 913 is equal to the radial size of the eighth rotating element 812.

[0641] In some of these embodiments, the thirteenth rotating element 913 includes, but is not limited to, a rotating groove.

[0642] Furthermore, the handle unit 900 further includes a fourteenth rotating element 914. Among them, the fourteenth rotating element 914 is disposed on the first handle element 901 and is connected to the ratchet driving unit 800.

[0643] Specifically, the fourteenth rotating element 914 is rotationally connected to the eighth rotating element 812.

[0644] The fourteenth rotating element 914 and the eighth rotating element 812 can be detachably connected or fixedly connected. For example, plugging, integrally forming, etc.

[0645] The size of the fourteenth rotating element 914 matches the size of the eighth rotating element 812. Generally, the radial dimension of the fourteenth rotating element 914 is equal to the radial dimension of the eighth rotating element 812.

[0646] In some of these embodiments, the fourteenth rotating element 914 includes, but is not limited to, a rotating groove.

[0647] Furthermore, the handle unit 900 further includes at least one eleventh limiting element 915. Wherein, the eleventh limiting element 915 is disposed on the side of the first handle element 901 and is in limiting connection with the ratchet driving unit 800 for limiting the first side of the ratchet driving unit 800.

[0648] Specifically, the eleventh limiting element 915 is slidably connected to the third limiting element 813.

[0649] The eleventh limiting element 915 penetrates through the first handle element 901.

[0650] The number of the eleventh limiting elements 915 matches the number of the third limiting elements 813. Generally, the number of the eleventh limiting elements 915 is equal to the number of the third limiting elements 813.

[0651] In the case where there are a plurality of the eleventh limiting elements 915, the plurality of eleventh limiting elements 915 are spaced apart along the length direction and / or the height direction of the first handle element 901.

[0652] The size of the eleventh limiting element 915 matches the size of the third limiting element 813. Generally, the radial dimension of the eleventh limiting element 915 is equal to the radial dimension of the third limiting element 813.

[0653] In some of these embodiments, the eleventh limiting element 915 includes, but is not limited to, a limiting hole.

[0654] Furthermore, the handle unit 900 further includes at least one twelfth limiting element 916. Wherein, the twelfth limiting element 916 is disposed on the side of the first handle element 901 and is in limiting connection with the ratchet driving unit 800 for limiting the first side of the ratchet driving unit 800.

[0655] Specifically, the twelfth limiting element 916 is slidably connected to the fourth limiting element 814.

[0656] The twelfth limiting element 916 is disposed through the first handle element 901.

[0657] The number of the twelfth limiting elements 916 matches the number of the fourth limiting elements 814. Generally, the number of the twelfth limiting elements 916 is equal to the number of the fourth limiting elements 814.

[0658] When there are a plurality of the twelfth limiting elements 916, the plurality of twelfth limiting elements 916 are spaced along the length direction and / or the height direction of the first handle element 901.

[0659] The size of the twelfth limiting element 916 matches the size of the fourth limiting element 814. Generally, the radial dimension of the twelfth limiting element 916 is equal to the radial dimension of the fourth limiting element 814.

[0660] In some of the embodiments, the twelfth limiting element 916 includes, but is not limited to, a limiting hole.

[0661] Further, the handle unit 900 further includes at least one thirteenth limiting element 917. Wherein, the thirteenth limiting element 917 is disposed on the side of the second handle element 903 and is in limiting connection with the ratchet driving unit 800 for limiting the second side of the ratchet driving unit 800.

[0662] Specifically, the thirteenth limiting element 917 is slidably connected to the fifth limiting element 815.

[0663] The thirteenth limiting element 917 is disposed through the second handle element 903.

[0664] The number of the thirteenth limiting elements 917 matches the number of the fifth limiting elements 815. Generally, the number of the thirteenth limiting elements 917 is equal to the number of the fifth limiting elements 815.

[0665] When there are a plurality of the thirteenth limiting elements 917, the plurality of thirteenth limiting elements 917 are spaced along the length direction and / or the height direction of the second handle element 903.

[0666] The size of the thirteenth limiting element 917 matches the size of the fifth limiting element 815. Generally, the radial dimension of the thirteenth limiting element 917 is equal to the radial dimension of the fifth limiting element 815.

[0667] In some of the embodiments, the thirteenth limiting element 917 includes, but is not limited to, a limiting hole.

[0668] Further, the handle unit 900 further includes at least one fourteenth limiting element 918. The fourteenth limiting element 918 is disposed on the side of the second handle element 903 and is limit-connected to the ratchet driving unit 800 for limiting the second side of the ratchet driving unit 800.

[0669] Specifically, the fourteenth limiting element 918 is slidably connected to the sixth limiting element 816.

[0670] The fourteenth limiting element 918 is disposed through the second handle element 903.

[0671] The number of the fourteenth limiting elements 918 matches the number of the sixth limiting elements 816. Generally, the number of the fourteenth limiting elements 918 is equal to the number of the sixth limiting elements 816.

[0672] When there are a plurality of the fourteenth limiting elements 918, the plurality of fourteenth limiting elements 918 are spaced along the length direction and / or the height direction of the second handle element 903.

[0673] The size of the fourteenth limiting element 918 matches the size of the sixth limiting element 816. Generally, the radial dimension of the fourteenth limiting element 918 is equal to the radial dimension of the sixth limiting element 816.

[0674] In some of these embodiments, the fourteenth limiting element 918 includes, but is not limited to, a limiting hole.

[0675] The usage method of this embodiment is basically the same as that of Embodiment 6 and will not be described herein again.

[0676] 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.

[0677] 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 able to realize 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 opening element being provided at the end of the distal end of the sheath tube unit; An electrode needle unit removably disposed inside the sheath tube unit for reciprocating movement along the axial direction of the sheath tube unit; Wherein, when the electrode needle unit is disposed in the sheath tube unit, the distal end of the electrode needle unit is exposed through the distal end of the sheath tube unit, the distal end of the electrode needle unit is away from the distal end of the sheath tube unit and reaches the radiofrequency ablation position, 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 electrode needle unit being removably disposed inside the sheath tube element; An opening element provided at the end or side of the distal end of the sheath tube element for the distal end of the electrode needle unit to pass through; 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 sheath tube unit for reciprocating movement along the axial direction of the sheath tube unit; A plurality of groove elements, the plurality of groove elements being distributed at 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 in the corresponding groove elements, the electrode sheet elements being annular.

3. The radiofrequency ablation device according to claim 2, wherein The sheath tube unit further comprises: A first gripping element provided at the proximal end of the sheath tube element for an operator to grip.

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

5. The radiofrequency ablation device according to claim 4, wherein, The sheath tube unit comprises: A sheath tube element, the guiding tube unit being removably disposed inside the sheath tube element; An opening element provided at the end or side of the distal end of the sheath tube element for the distal end of the electrode needle unit to pass through; and / or The guiding tube unit comprises: A guiding tube element removably disposed inside the sheath tube unit, the electrode needle unit being movably disposed inside the guiding tube element; 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 at 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 in the corresponding groove elements, the electrode sheet elements being annular.

6. The radiofrequency ablation device according to claim 5, wherein, The sheath tube unit further comprises: A first gripping element, which is arranged at the proximal end of the sheath tube element and is used for an operator to grip.

7. The radiofrequency ablation device according to any one of claims 4 to 6, characterized in that, It further includes: A screw 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; Or An electric 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; or A link 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; or 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; Or 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.

8. The radiofrequency ablation device according to claim 7, characterized in that, The guide tube unit further includes: At least one sliding element, which is arranged at the proximal end of the guide tube unit, penetrates through the side part of the guide tube unit, and is slidably connected to the electrode needle unit; and / or The electrode needle unit further includes: A first threaded element, which is arranged at the proximal end of the electrode needle unit and is helically connected to the screw drive unit, and is used to drive the electrode needle unit to reciprocate axially along the guide tube unit under the action of the screw drive unit; and / or The electrode needle unit further includes: At least one first link element, which is arranged at the proximal end of the electrode needle unit, and the distal end of the first 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; At least one first movable element, which is arranged at the proximal end of the first link element and is movably connected to the electric drive unit, and is used to drive the first 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: At least one second link element, which is arranged at the proximal end of the electrode needle unit, and 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 third movable element, which is arranged at the proximal end of the second link element and is movably connected to the link drive unit, and is used to drive the second 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: At least one 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 is meshed 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: At least one 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 driving unit, and is used to drive the electrode needle unit to reciprocate axially along the guiding tube unit under the action of the ratchet driving unit; and / or The screw driving unit includes: A first control element, which is movably arranged at the proximal end of the electrode needle unit; A second threaded element, which is arranged at the distal end of the first control element and is in screw connection with the proximal end of the electrode needle unit, and is used to drive the electrode needle unit to reciprocate axially along the guiding tube unit under the action of the first control element; and / or The electric driving unit includes: A second control element, which is arranged at the proximal end of the electrode needle unit; At least one second movable element, which is arranged at the output end of the second control element and is movably connected to the electrode needle unit, and is used to drive the electrode needle unit to reciprocate axially along the guiding tube unit under the action of the second control element; and / or The link driving unit includes: A third control element, which is movably arranged at the proximal end of the electrode needle unit; A fourth movable element, which is arranged at the end of the third control element and is movably connected to the electrode needle unit, and is used to drive the electrode needle unit to reciprocate axially along the guiding tube unit under the action of the third control element; and / or The meshing driving unit includes: A fourth 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 fourth control element and is used to reciprocate under the action of the fourth control element; A first gear element, which is movably arranged at the end of the fourth control element and meshes with the second rack element, and is used to rotate reciprocally under the action of the second rack element; At least one second gear element, which is coaxially arranged with the first gear element and meshes with the electrode needle unit, and is used to drive the electrode needle unit to reciprocate axially along the guiding tube unit under the action of the first gear element; and / or The ratchet driving unit includes: A fifth 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 fifth control element and is used to reciprocate under the action of the fifth control element; A first ratchet element, which is movably arranged at the end of the fifth control element and is removably meshed with the fourth rack element, and is used to rotate reciprocally under the action of the fourth rack element; A second ratchet element, coaxially arranged with the first ratchet element, cooperating with the first ratchet element, and removably engaging 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, coaxially arranged with the second ratchet element, and removably engaging 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, meshing with the third gear element, for rotating under the action of the third gear element; A fifth gear element, coaxially arranged with the fourth gear element, and removably engaging 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 sixth control element, movably arranged on a first side of the ratchet drive unit, and respectively abutting against a first side of the third gear element and a first side of the fifth gear element, for moving axially along the third gear element to separate the third gear element from the electrode needle unit and moving axially along the fifth gear element to engage the fifth gear element with the electrode needle unit; A seventh control element, movably arranged on a second side of the ratchet drive unit, and respectively abutting against a second side of the third gear element and a second side of the fifth gear element, for moving axially along the third gear element to engage the third gear element with the electrode needle unit and moving axially along the fifth gear element to separate the fifth gear element from the electrode needle unit.

9. The radiofrequency ablation device according to claim 8, characterized in that, The screw drive unit further includes: A second holding element, arranged at the proximal end of the guide tube unit, the distal end of the second holding element being connected to the proximal end of the guide tube unit, and the distal end of the second holding element being rotatably connected to the first control element; and / or The electric drive unit further includes: At least one first rotating element, arranged at the distal end of the second movable element, for rotating under the action of the second movable element; and / or The electric drive unit further includes: At least one second rotating element, arranged at the proximal end of the second movable element, for rotating under the action of the second movable element; and / or The electric drive unit further includes: At least one first limiting element, arranged at the proximal end of the second movable element, for limiting the position of the second movable element; and / or The electric drive unit further includes: At least one second limiting element, arranged at the distal end of the second movable element, for limiting the position of the second movable element; and / or The link drive unit further includes: A third 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 fourth 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 fifth 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: A sixth 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 seventh 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: An eighth 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 third limiting element, which is arranged on 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 fourth limiting element, which is arranged on 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 fifth 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 as to mesh the third gear element with the electrode needle unit; and / or The ratchet drive unit further includes: At least one sixth 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 as to separate the fifth gear element from the electrode needle unit; and / or The ratchet drive unit further includes: A reset element, which is arranged at the proximal end of the fifth control element and is used to reset the fifth control element.

10. The radiofrequency ablation device according to claim 7, 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.

11. The radiofrequency ablation device according to claim 10, characterized in that, 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 at 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.

12. The radiofrequency ablation device according to claim 11, wherein The handle unit further includes: A ninth 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 tenth 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 An eleventh 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 twelfth 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 A thirteenth rotating element, which is arranged on the first handle element and is connected to the ratchet drive unit; and / or A fourteenth rotating element, which is arranged on the second handle element and is connected to the ratchet drive unit; and / or A seventh limiting element, which is arranged inside the first handle element and abuts against the proximal end of the electrode needle unit, and is used to limit the upper side of the electrode needle unit; and / or An eighth limiting element, which is arranged inside the second handle element and abuts against the proximal end of the electrode needle unit, and is used to limit the upper side of the electrode needle unit; and / or A ninth limiting element, which is arranged inside the first handle element and abuts against the proximal end of the electrode needle unit, and is used to limit the lower side of the electrode needle unit; and / or A tenth limiting element, which is arranged inside the second handle element and abuts against the proximal end of the electrode needle unit, and is used to limit the lower side of the electrode needle unit; and / or At least one eleventh limiting element, which is arranged at the side of the first handle element and is connected to the ratchet drive unit in a limiting manner, and is used to limit the first side of the ratchet drive unit; and / or At least one twelfth 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 thirteenth 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 fourteenth 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.

Images