Radio frequency surgical device

Abstract

The application provides a radio frequency surgical device, which comprises a radio frequency handle and a radio frequency knife head, and the radio frequency handle and the radio frequency knife head are detachably connected; the radio frequency handle comprises a first plug connector and a first electrode connector; the radio frequency knife head comprises a second plug connector and a second electrode connector; the first plug connector is used for being detachably assembled with the second plug connector; the first plug connector comprises a first rotation limiting part, and the second plug connector comprises a second rotation limiting part; when the first plug connector is assembled with the second plug connector, the first rotation limiting part and the second rotation limiting part are used for limiting the circumferential rotation of the radio frequency knife head around the axis of the radio frequency knife head relative to the radio frequency handle; the first electrode connector is arranged on the first plug connector according to a predetermined arrangement rule, the second electrode connector is arranged on the second plug connector according to the predetermined arrangement rule, and when the first plug connector is assembled with the second plug connector, the first electrode connector and the second electrode connector are mutually aligned based on the predetermined arrangement rule, so that the electrical conduction is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a radio frequency surgical device. BACKGROUND

[0002] With the development of new medical technology, plasma radio frequency surgery emerges as the times require, which transmits radio frequency energy through a conductive solution (such as physiological saline) near or in contact with the tissue to be treated. In the ablation mode, when sufficient energy is applied, the conductive solution is converted into a vapor layer containing high-energy charged particles (plasma), which will cause tissue disintegration through molecular dissociation when in contact with the tissue. In the electrocoagulation mode, a lower voltage is applied, and the electric field is below the threshold required to create a plasma layer, which will cause resistance tissue heating to coagulate blood vessels and stop intraoperative bleeding. The plasma working temperature is between 40℃ and 70℃, which effectively reduces tissue damage and alleviates patient pain. It is currently widely used in the fields of neurosurgery and orthopedics, and can be used with endoscopic systems for endovascular surgery or with imaging systems for interventional therapy.

[0003] The electrode tip part and the radio frequency handle of the conventional plasma radio frequency surgical device on the market are integrated, and the electrode tip has various types. Doctors need to select electrode tips with different angles, shapes and numbers of excitation electrodes according to different patient conditions. Since the number of excitation electrodes on different electrode tips is different, the number of excitation electrodes limits the radio frequency handle to be connected and used only with electrode tips of the same number of excitation electrodes, so that the existing electrode tip and radio frequency handle are often configured as a whole. Therefore, the used electrode tip and radio frequency handle are scrapped together after each operation, resulting in great material waste and increasing the treatment cost of patients. SUMMARY

[0004] The purpose of the present application is to provide a radio frequency surgical device to solve the problem of material waste caused by the integrated setting of the existing radio frequency tip and radio frequency handle.

[0005] To solve the above technical problems, the present application provides a radio frequency surgical device, which comprises a radio frequency handle and a radio frequency tip, wherein the radio frequency handle and the radio frequency tip are detachably connected; the radio frequency handle comprises a first plug-in part and a first electrode connecting part; the radio frequency tip comprises a second plug-in part and a second electrode connecting part;

[0006] The first plug-in part is used for separable assembly connection with the second plug-in part; the first plug-in part comprises a first rotation limiting part, and the second plug-in part comprises a second rotation limiting part; when the first plug-in part and the second plug-in part are assembled and connected, the first rotation limiting part and the second rotation limiting part are used to limit the circumferential rotation of the radio frequency tip around its own axis relative to the radio frequency handle;

[0007] The first electrode connecting piece is arranged on the first plug-in piece according to a predetermined arrangement rule, and the first electrode connecting piece has a predetermined circumferential position relationship with the first limiting rotation part; the second electrode connecting piece is arranged on the second plug-in piece according to the predetermined arrangement rule, and the second electrode connecting piece has a predetermined circumferential position relationship with the second limiting rotation part.

[0008] When the first plug-in piece and the second plug-in piece are assembled and connected, the first electrode connecting piece and the second electrode connecting piece are mutually aligned based on the predetermined arrangement rule, so as to realize electrical conduction.

[0009] Optionally, the radio frequency surgical device comprises a plurality of radio frequency knife heads of different specifications; and the radio frequency handle is configured to selectively connect with the radio frequency knife heads of different specifications.

[0010] Optionally, the radio frequency surgical device further comprises a first sealing member.

[0011] The first plug-in piece comprises a concave cavity extending along the axial direction of the radio frequency handle and a receiving cavity, the concave cavity is open towards the distal end, the receiving cavity is located at the proximal end of the concave cavity, the receiving cavity is in communication with the concave cavity, and the cavity walls of the two form a first step surface towards the distal end.

[0012] The second plug-in piece comprises a boss extending along the axial direction of the radio frequency knife head and an electrode seat, the electrode seat is located at the proximal end of the boss, and the electrode seat and the boss are connected to form a second step surface towards the proximal end.

[0013] When the first plug-in piece and the second plug-in piece are assembled and connected, the boss is adapted to be inserted into the concave cavity, the electrode seat is adapted to be inserted into the receiving cavity, and the first step surface is abutted and sealedly connected with the second step surface through the first sealing member.

[0014] Optionally, the first electrode connecting piece is a female plug, the female plug is recessed along the axial direction of the radio frequency handle and arranged on the proximal end surface of the receiving cavity; the second electrode connecting piece is a male plug matched with the female plug, and the male plug is protruded along the axial direction of the radio frequency knife head and arranged on the proximal end surface of the electrode seat.

[0015] Optionally, the number of the second electrode connecting pieces is not greater than the number of the first electrode connecting pieces; or the radio frequency knife head further comprises an excitation electrode electrically connected with the second electrode connecting pieces, and the number of the excitation electrodes is not greater than the number of the second electrode connecting pieces.

[0016] Optionally, the inner circumferential wall of the concave cavity is hexagonal, forming the first limiting rotation part; or the inner circumferential wall of the concave cavity is circular, and the first limiting rotation part is a groove arranged on the inner circumferential wall of the concave cavity.

[0017] Optionally, the radio frequency handle further comprises a first locking member, and the radio frequency knife head further comprises a second locking member;

[0018] After the first plug-in connector and the second plug-in connector are assembled and connected, the first locking member is used for adaptive connection with the second locking member to limit the axial position of the first plug-in connector relative to the second plug-in connector.

[0019] Optionally, the first locking member comprises a threaded segment arranged along the axial direction of the radio frequency handle, and the threaded segment has an outer thread arranged in the circumferential direction; the second locking member comprises a nut rotatable around the axial line of the radio frequency knife head, and the nut has an inner thread arranged in the circumferential direction, which is adapted to the outer thread; the first locking member and the second locking member are connected through threads to limit the axial position of the second plug-in connector relative to the first plug-in connector.

[0020] Optionally, the radio frequency surgical device further comprises a second sealing member; the radio frequency handle further comprises a third stepped surface facing the distal end, which is arranged around the threaded segment; the third stepped surface is used for abutting and sealing connection with the nut through the second sealing member.

[0021] Optionally, the radio frequency handle further comprises a first indicating member, and the radio frequency knife head further comprises a second indicating member;

[0022] The first indicating member is used for circumferential alignment with the second indicating member when the radio frequency handle and the radio frequency knife head are assembled and connected.

[0023] In summary, the radio frequency surgical device provided by the application comprises a radio frequency handle and a radio frequency knife head, which are detachably connected; the radio frequency handle comprises a first plug-in connector and a first electrode connecting member; the radio frequency knife head comprises a second plug-in connector and a second electrode connecting member; the first plug-in connector is used for separable assembly connection with the second plug-in connector; the first plug-in connector comprises a first rotation limiting part, and the second plug-in connector comprises a second rotation limiting part; when the first plug-in connector and the second plug-in connector are assembled and connected, the first rotation limiting part and the second rotation limiting part are used for limiting the circumferential rotation of the radio frequency knife head around the axial line thereof relative to the radio frequency handle; the first electrode connecting member is arranged on the first plug-in connector according to a predetermined arrangement rule, and the first electrode connecting member and the first rotation limiting part have a predetermined circumferential positional relationship; the second electrode connecting member is arranged on the second plug-in connector according to the predetermined arrangement rule, and the second electrode connecting member and the second rotation limiting part have a predetermined circumferential positional relationship; when the first plug-in connector and the second plug-in connector are assembled and connected, the first electrode connecting member and the second electrode connecting member are mutually aligned based on the predetermined arrangement rule, realizing electrical conduction.

[0024] Thus configured, since the radio frequency handle is detachably connected with the radio frequency knife head, the radio frequency knife head can be disassembled and assembled. Further, based on the predetermined arrangement rule of the first electrode connecting piece and the second electrode connecting piece, when the first plug-in piece and the second plug-in piece are assembled and connected, the first electrode connecting piece and the second electrode connecting piece can ensure the mutual alignment, so as to realize the electrical conduction. Thus, the radio frequency handle can be conveniently disassembled and assembled with the radio frequency knife head, allowing the repeated use of the radio frequency handle, reducing the waste of materials; in addition, it is also convenient to replace the radio frequency knife head, effectively improving the operation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0025] Those skilled in the art will understand that the provided drawings are for the purpose of better illustrating the present application and do not constitute any limitation on the scope of the present application. Among them:

[0026] Figure 1 is a schematic view of a radio frequency surgical device according to an embodiment of the present application;

[0027] Figure 2 is Figure 1 is an enlarged view of A part of the radio frequency surgical device shown in the figure;

[0028] Figure 3 is a schematic view of a radio frequency knife head according to an embodiment of the present application (without nut);

[0029] Figure 4 is a schematic view of a radio frequency handle according to an embodiment of the present application;

[0030] Figure 5 is a schematic view of a radio frequency knife head according to another embodiment of the present application;

[0031] Figure 6 is a schematic view of a radio frequency handle according to another embodiment of the present application;

[0032] Figure 7 is a perspective view of a radio frequency surgical device according to an embodiment of the present application;

[0033] Figure 8 is a schematic view of a radio frequency knife head according to an embodiment of the present application (with nut);

[0034] Figure 9 is a schematic view of the assembly and connection of a radio frequency knife head and a radio frequency handle according to an embodiment of the present application.

[0035] In the drawings:

[0036] 1-RF handle; 101-Electrode rod; 102-Electrode rod insulating sleeve; 103-Handle; 104-Electrode cable; 105-Electrode cable socket; 11-First connector; 110-First rotation limiting part; 111-Cavity; 112-Accommodating cavity; 113-First stepped surface; 114-Groove; 12-First electrode connector; 13-Threaded section; 14-Third stepped surface; 15-First indicator; 2-RF blade; 20-Blade body; 21-Second connector; 210-Second rotation limiting part; 211-Boss; 212-Electrode seat; 213-Second stepped surface; 214-Protrusion; 22-Second electrode connector; 23-Excitation electrode; 24-Nut; 25-Axial limiting part; 26-Second indicator; 31-First seal; 32-Second seal. Detailed Implementation

[0037] To make the objectives, advantages, and features of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the explanation of the embodiments of this invention. Furthermore, the structures shown in the drawings are often part of the actual structures. In particular, different figures may emphasize different aspects and may sometimes use different scales.

[0038] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects; the term “or” is generally used to mean “and / or”; the term “a number” is generally used to mean “at least one”; and the term “at least two” is generally used to mean “two or more”. Furthermore, the terms “second,” “first,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “second,” “first,” or “third” may explicitly or implicitly include one or at least two of that feature; “one end” and “the other end,” and “proximal end” and “distal end” generally refer to two corresponding parts, which include not only endpoints. Furthermore, the terms "installed," "connected," and "attached," as used in this invention, and the term "set" on one element from another, should be interpreted broadly. They generally only indicate a connection, coupling, cooperation, or transmission relationship between the two elements, which can be direct or indirect through an intermediate element. They should not be construed as indicating or implying a spatial relationship between the two elements, meaning one element can be located inside, outside, above, below, or to one side of another element, unless otherwise explicitly stated. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances. Additionally, directional terms such as above, below, up, down, upward, downward, left, and right are used relative to exemplary embodiments as shown in the figures, with upward or upper directions pointing towards the top of the corresponding figure, and downward or lower directions pointing towards the bottom of the corresponding figure.

[0039] The purpose of this invention is to provide a radiofrequency surgical device to solve the problem of material waste caused by the existing integrated radiofrequency blade and radiofrequency handle.

[0040] The following description refers to the accompanying drawings.

[0041] Please refer to Figures 1 to 4This invention provides a radiofrequency surgical device, comprising a radiofrequency handle 1 and a radiofrequency blade 2, wherein the radiofrequency handle 1 and the radiofrequency blade 2 are detachably connected; the radiofrequency handle 1 includes a first connector 11 and a first electrode connector 12; the radiofrequency blade 2 includes a second connector 21 and a second electrode connector 22; the first connector 11 is used for detachably assembling and connecting with the second connector 21; the first connector 11 includes a first rotation limiting portion 110, and the second connector 21 includes a second rotation limiting portion 210; when the first connector 11 and the second connector 21 are assembled and connected, the first rotation limiting portion 110 and the second rotation limiting portion 210 are used to limit the radiofrequency... The blade 2 rotates circumferentially relative to the RF handle 1 around its own axis; the first electrode connector 12 is arranged on the first plug-in 11 according to a predetermined arrangement rule, and the first electrode connector 12 and the first rotation limiting part 110 have a predetermined circumferential positional relationship; the second electrode connector 22 is arranged on the second plug-in 21 according to the predetermined arrangement rule, and the second electrode connector 22 and the second rotation limiting part 210 have a predetermined circumferential positional relationship; when the first plug-in 11 and the second plug-in 21 are assembled and connected, the first electrode connector 12 and the second electrode connector 22 are aligned with each other based on the predetermined arrangement rule to achieve electrical conduction.

[0042] In an alternative example, such as Figure 1 As shown, the RF handle 1 is along its own axis ( Figure 1 The middle section (from the upper left to the lower right) includes the distal end (i.e., the end closest to the patient's affected area). Figure 1 From the upper left corner to the proximal end (i.e., the end closest to the surgeon), Figure 1 The electrode rod 101, electrode rod insulating sleeve 102, handle 103, electrode cable 104, and electrode cable socket 105 are connected sequentially from the bottom right corner. The electrode rod 101 is roughly cylindrical, with a first connector 11 located at the distal end for detachable connection to the second connector 21 of the radiofrequency blade head 2. The electrode rod insulating sleeve 102 is fitted onto the electrode rod 101, primarily for insulation to prevent damage to surrounding tissue. The handle 103 is mainly for the operator to grip. The distal end of the electrode cable 104 is electrically connected to the first electrode connector 12 (e.g., via a conductor located inside the handle 103 and electrode rod 101), and the proximal end of the electrode cable 104 is electrically connected to the electrode cable socket 105, which is used for connection to the radiofrequency host. Figure 3As shown, the radio frequency (RF) blade tip 2 includes a generally cylindrical blade body 20, with the axial direction of the RF blade tip 2 being the direction of the axis of the blade body 20. Further, the RF blade tip 2 also includes an excitation electrode 23, which is disposed at the distal end of the blade body 20. The second connector 12 and the second electrode connector 22 are disposed at the proximal end of the blade body 20. The excitation electrode 23 is electrically connected to the second electrode connector 22. Please refer to the reference [reference needed]. Figure 7 The excitation electrode 23 can be electrically connected to the second electrode connector 22 through a conductor disposed inside the cutter head body 20.

[0043] In this way, the radio frequency signal emitted by the radio frequency host is transmitted sequentially through the electrode cable connector 105 and the electrode cable 104 to the first electrode connector 12, and then through the second electrode connector 22 of the radio frequency cutter head 2 to the excitation electrode 23, which then emits radio frequency signals to the target area.

[0044] It should be noted that, taking the first electrode connector 12 as an example, the first electrode connector 12 being arranged on the first connector 11 according to a predetermined arrangement rule means that the position of the first electrode connector 12 on the first connector 11 is arranged according to a predetermined rule. Once the arrangement rule is determined, the position of the first electrode connector 12 on the first connector 11 is also determined. In some embodiments, the radio frequency blade 2 includes multiple excitation electrodes 23. Correspondingly, the radio frequency handle 1 includes multiple first electrode connectors 12. The arrangement of the multiple first electrode connectors 12 on the first connector 11 has a certain order, and the predetermined arrangement rule also includes the arrangement order of the multiple first electrode connectors 12.

[0045] Furthermore, taking the first electrode connector 12 as an example, the predetermined circumferential positional relationship between the first electrode connector 12 and the first rotation limiting part 110 means that when the circumferential angle of the first rotation limiting part 110 is determined (for example, rotating around its own axis to a certain angle), the circumferential angle of the arrangement position of the first electrode connector 12 is also determined.

[0046] Similarly, the second electrode connector 22 is also arranged according to the same arrangement rules and circumferential positional relationship. In this way, after the first connector 11 and the second connector 21 are assembled and connected, based on the same reference system (i.e. the same arrangement rules and circumferential positional relationship), it can be ensured that the first electrode connector 12 and the second electrode connector 22 are aligned with each other to achieve electrical conduction.

[0047] Specifically, the first electrode connector 12 and the second electrode connector 22 are arranged according to the same arrangement rule, but this does not mean that the number of first electrode connectors 12 and second electrode connectors 22 must be the same. Only the arrangement rule is restricted. This arrangement rule can be, for example, a set of arrangement points based on a matrix of a rows and b columns, or a set of arrangement points based on a polar coordinate system of poles, polar axes, and polar radii. Once the arrangement rule is determined, the first electrode connector 12 and the second electrode connector 22 are arranged sequentially on their corresponding arrangement points. This ensures that the first electrode connector 12 and the second electrode connector 22 can be aligned with each other under the same arrangement rule.

[0048] For example, in a demonstration case using polar coordinates, the first arrangement point is the pole, and the polar coordinates of the subsequent n arrangement points are (ρ1, θn), where ρ1 is the polar radius and n is a natural number. These n arrangement points are actually arranged sequentially around the pole. Furthermore, if more than m arrangement points are needed after the n arrangement points, the polar coordinates of the subsequent m arrangement points are (ρ2, θm), where ρ2 > ρ1 and m is a natural number. Of course, the arrangement points are not limited to two circles; there can be more. Understandably, when only one first electrode connector 12 needs to be arranged, it occupies the first arrangement point at the pole position. If multiple first electrode connectors 12 need to be arranged, they are arranged sequentially at the n arrangement points (ρ1, θn), and more first electrode connectors 12 are arranged sequentially at the m arrangement points (ρ2, θm). Correspondingly, the second electrode connector 22 follows the same arrangement principle.

[0049] Furthermore, since the RF handle 1 and the RF blade 2 can rotate independently in the circumferential direction when separated, their rotation may cause the first electrode connector 12 and the second electrode connector 22, even though they are arranged according to the same rules, to misalign due to inconsistencies in their circumferential angles. The first rotation limiting part 110 and the second rotation limiting part 210 are a set of compatible rotation limiting structures. The first connector 11 and the second connector 21 are preferably assembled axially. After the first connector 11 and the second connector 21 are assembled, the first rotation limiting part 110 and the second rotation limiting part 210 can restrict the relative circumferential rotation of the first connector 11 and the second connector 21. Therefore, the first electrode connector 12 and the second electrode connector 22 are not affected by the relative circumferential rotation of the first connector 11 and the second connector 21.

[0050] With this configuration, the RF handle 1 is detachably connected to the RF blade head 2, allowing for the disassembly and assembly of the RF blade head 2. Furthermore, based on the arrangement of the first electrode connector 12 and the second electrode connector 22, when the first connector 11 and the second connector 21 are assembled, the first electrode connector 12 and the second electrode connector 22 can be ensured to be mutually aligned, thereby achieving electrical conduction. Thus, the RF handle 1 can be easily disassembled and assembled with the RF blade head 2, allowing for the reuse of the RF handle 1 and reducing material waste; it also facilitates the replacement of the RF blade head 2, effectively improving surgical efficiency.

[0051] Preferably, the radiofrequency surgical device includes multiple radiofrequency blades 2 of different specifications, and the radiofrequency handle 1 is used to selectively connect to one of the multiple radiofrequency blades 2 of different specifications. It should be noted that the different specifications of the radiofrequency blades 2 here refer to having excitation electrodes 23 with different angles, or having different numbers of excitation electrodes 23. It is understood that in different surgical applications, the angle and number of excitation electrodes 23 can be selected in various ways, resulting in multiple different specifications of the radiofrequency blades 2. For example, in... Figure 3 In the illustrated example, the radio frequency (RF) cutter head 2 includes 17 excitation electrodes 23, which are arranged at 90° to the axial direction of the RF cutter head 2. The angle of the excitation electrodes 23 is referred to as 90°.

[0052] The specifications of commonly used radiofrequency blades 2 in existing plasma radiofrequency surgery are shown in Table 1 below:

[0053] Table 1

[0054]

[0055]

[0056] Generally, different numbers of excitation electrodes 23 result in different structures for the radiofrequency blade 2, allowing the radiofrequency handle 1 to be compatible with the radiofrequency blade 2. Therefore, in existing radiofrequency surgical devices, the varying numbers of excitation electrodes 23 limit the radiofrequency handle 1 to only be connected to radiofrequency blades 2 with the same number of excitation electrodes 23, preventing compatibility with radiofrequency blades 2 with different numbers of excitation electrodes 23. However, in the radiofrequency surgical device provided in this embodiment, through the assembly connection of the first connector 11 and the second connector 21, and based on the arrangement rules of the first electrode connector 12 and the second electrode connector 22, the radiofrequency handle 1 can be connected to radiofrequency blades 2 of different specifications.

[0057] Preferably, to facilitate the adaptation of the radio frequency blade tip 2, the number of excitation electrodes 23 is no greater than the number of second electrode connectors 22. Please refer to... Figure 3The illustrated example shows radio frequency (RF) blade 14 as shown in Table 1 above, which has 17 excitation electrodes 23 but 18 second electrode connectors 22. In other embodiments, such as RF blade 1 in Table 1 above, the number of excitation electrodes 23 is 1, but the number of second electrode connectors 22 can also be 18. Thus, some of the 18 second electrode connectors 22 are actually unused. However, the arrangement of the 18 second electrode connectors 22 is fixed, and the number of first electrode connectors 12 can also be 18, so that regardless of the number of excitation electrodes 23, accurate connection can be achieved through the first electrode connectors 12 and the second electrode connectors 22. Preferably, according to Table 1 above, the maximum number of excitation electrodes 23 in common RF blades 2 is 18. Therefore, to maximize compatibility with various RF blades 2, the number of first electrode connectors 12 should not be less than 18. It should be noted that the above example shows 18 first electrode connectors 12 and 18 second electrode connectors 22. This is merely an example and not a limitation on the number of first electrode connectors 12 and second electrode connectors 22. In particular, the number of first electrode connectors 12 is not limited to be the same as the number of second electrode connectors 22. In some embodiments, the number of first electrode connectors 12 may differ from the number of second electrode connectors 22. The specific configuration depends on the structure of the first electrode connectors 12 and the second electrode connectors 22, as detailed below.

[0058] Please refer to Figure 3 and Figure 4 In an alternative example, the first connector 11 includes an axially extending cavity 111; the cavity 111 opens distally. Optionally, the inner peripheral wall of the cavity 111 is hexagonal, forming the first rotation limiting portion. The second connector 21 includes an axially extending boss 211; optionally, the outer peripheral wall of the boss 211 is hexagonal, forming the second rotation limiting portion. It is understood that the cavity 111 refers to an accommodating space formed by an axial recess, while the corresponding boss 211 refers to a solid connector protruding axially (proximally), the cavity 111 having an opening in the direction of the RF blade 2 (i.e., distally), and the boss 211 being able to be fitted and accommodated in the cavity 111 when the first connector 11 and the second connector 21 are assembled together.

[0059] The hexagonal boss 211 and cavity 111 restrict circumferential rotation of both, preventing misalignment between the first electrode connector 12 and the second electrode connector 22. It is understood that the inclusion of the cavity 111 in the first connector 11 and the boss 211 in the second connector 21 is merely an example and not a limitation on the first and second connectors. In other embodiments, the first connector 11 may include a boss and the second connector 21 may include a cavity, with a similar principle. Specifically, the hexagon here can refer to a regular hexagon or a hexagon with unequal side lengths. Hexagons with unequal side lengths, besides restricting the rotation of the RF blade 2 relative to the RF handle 1, also serve a foolproof function. It should be noted that the hexagon is merely an example of the shape of the boss 211 and cavity 111, not a limitation; the boss 211 and cavity 111 can also be other non-rotational shapes, such as squares, triangles, stars, or even irregular shapes.

[0060] Furthermore, the first connector 11 further includes an axially extending receiving cavity 112, the receiving cavity 112 being located near the proximal end of the recess 111; the second connector 21 further includes an axially extending electrode seat 212, the electrode seat 212 being located near the proximal end of the boss 211. When the first connector 11 and the second connector 21 are assembled and connected, the electrode seat 212 can be adapted to be inserted into and received in the receiving cavity 112.

[0061] The accommodating cavity 112 communicates with the recessed cavity 111, and the walls of both cavity 112 form a first stepped surface 113 facing the distal end. The electrode seat 212 is connected to the boss 211 to form a second stepped surface 213 facing the proximal end. The radiofrequency surgical device also includes a first sealing member 31. When the first connector 11 and the second connector 21 are assembled and connected, the first stepped surface 113 abuts against and seals the second stepped surface 213 through the first sealing member 31. This forms a sealed connection between the first connector 11 and the second connector 21, preventing liquid and impurities from entering the radiofrequency handle 1 and the radiofrequency blade 2 during the operation. It should be noted that the accommodating cavity 112 is similar to the recessed cavity 111 described above, and is an accommodating space formed by an axial recess; the electrode seat 212 is similar to the boss 211 described above, and is an axially protruding solid connector.

[0062] Similarly, it is understood that the inclusion of a receiving cavity 112 in the first connector 11 and an electrode holder 212 in the second connector 21 is merely an example and not a limitation on the first connector 11 and the second connector 21. In other embodiments, the first connector 11 may include an electrode holder while the second connector 21 may include a receiving cavity, with a similar principle.

[0063] Optionally, the first electrode connector 12 is a female connector, recessed along the axial direction of the RF handle 1 on the proximal surface of the receiving cavity 112; the second electrode connector 22 is a male connector adapted to the female connector, protruding along the axial direction of the RF blade 2 on the proximal surface of the electrode holder 212. Preferably, the number of second electrode connectors 22 is not greater than the number of first electrode connectors 12. In an alternative example, the first electrode connector 12 is a female connector, specifically an electrode socket, while the second electrode connector 22 is a male connector, specifically an electrode pin, and the second electrode connector 22 can be inserted into the first electrode connector 12 to achieve electrical connection. It is understood that the recessed first electrode connector 12 and the protruding second electrode connector 22 are merely examples and not limitations on the first electrode connector 12 and the second electrode connector 22. In other embodiments, the first electrode connector 12 may be protruding while the second electrode connector 22 is recessed, with a similar principle.

[0064] Preferably, if the number of second electrode connectors 22 is the same as the number of first electrode connectors 12, then based on the same arrangement rule, their arrangement positions are the same, and the second electrode connectors 22 and first electrode connectors 12 are connected in a one-to-one correspondence. If the number of second electrode connectors 22 is less than the number of first electrode connectors 12, based on the same arrangement rule, the arrangement position of the first electrode connectors 12 can cover the arrangement position of the second electrode connectors 22. When the second electrode connectors 22 and first electrode connectors 12 are connected, a portion of the first electrode connectors 12 is left empty, while all the second electrode connectors 22 are inserted into their corresponding first electrode connectors 12. Thus, the number of second electrode connectors 22 is not greater than the number of first electrode connectors 12, ensuring that the same RF handle 1 can be used even when facing RF blades 2 with different numbers of second electrode connectors 22. It should be noted that the limitation that the number of second electrode connectors 22 is not greater than the number of first electrode connectors 12 should be the case where the first electrode connectors 12 are recessed. Otherwise, if the first electrode connector 12 is a protrusion and its number is greater than that of the second electrode connector 22, the two cannot be connected. In this case, the number of the second electrode connector 22 should be configured to be no less than the number of the first electrode connector 12.

[0065] Please refer to Figure 5 and Figure 6In another embodiment, the first connector 11 includes an axially extending cavity 111, the inner peripheral wall of which is circular, and the first rotation limiting portion is a groove 114 disposed on the inner peripheral wall of the cavity 111. The second connector 21 includes an axially extending boss 211, the outer peripheral wall of which is circular, and the second rotation limiting portion is a protrusion 214 disposed on the outer peripheral wall of the boss 211. The protrusion 214 extends axially along the boss 211, the groove 114 extends axially along the cavity 111, and the circumferential width of the protrusion 214 is adapted to the circumferential width of the groove 114, so that the protrusion 214 can be inserted into the groove 114 axially, but the circumferential rotation of the boss 211 relative to the cavity 111 is limited by the protrusion 214 and the groove 114. It is understood that in some other embodiments, the first limiting part may also be a protrusion provided on the inner peripheral wall of the cavity 111, and the corresponding second limiting part may be a groove provided on the outer peripheral wall of the boss 211. This embodiment is not limited to this.

[0066] exist Figure 5 and Figure 6 In the illustrated example, the first rotation limiting part includes two grooves 114 symmetrically arranged about the axis of the cavity 111, and the second rotation limiting part includes two protrusions 214 symmetrically arranged about the axis of the boss 211. Preferably, the two grooves 114 have different circumferential widths, and the two protrusions 214 have different circumferential widths, with each groove 114 corresponding to one of the two protrusions 214. This configuration provides a foolproof effect, ensuring that the first connector 11 and the second connector 21 have only one circumferential connection direction, preventing misalignment of the first electrode connector 12 and the second electrode connector 22 due to incorrect insertion. After the first connector 11 and the second connector 21 are inserted, the protrusions 214 and grooves 114 are used to limit circumferential rotation. It should be noted that the arrangement of the two grooves 114 and protrusions 214 with different widths is only an example of the first and second rotation limiting parts and not a limitation thereof.

[0067] In some embodiments, the first rotation limiting part may include only one groove 114, and the second rotation limiting part may include only one protrusion 214, so that the first connector 11 and the second connector 21 also have only one connection direction. In other embodiments, the first rotation limiting part includes at least two grooves 114, and the second rotation limiting part includes at least two protrusions 214, but the circumferential distribution of the grooves 114 around the cavity 111 is not centrally symmetrical, and the circumferential distribution of the protrusions 214 around the boss 211 is also not centrally symmetrical, and their positions are the same as the circumferential distribution of the grooves 114 around the cavity 111. In this way, the first connector 11 and the second connector 21 also have only one connection direction, which can achieve the effect of preventing mistaken connection. Those skilled in the art can understand and modify this according to the prior art, and this embodiment will not be described in detail here.

[0068] Optional, please refer to Figure 7 and Figure 8 The RF handle 1 further includes a first locking member, and the RF blade 2 further includes a second locking member; after the first connector 11 and the second connector 21 are assembled and connected, the first locking member is used to adapt and connect with the second locking member to limit the axial position of the first connector 11 relative to the second connector 21. Figure 7 and Figure 8 In the illustrated example, the first locking member includes a threaded segment 13 arranged axially along the RF handle 1, the threaded segment 13 having a circumferentially arranged external thread. Correspondingly, the second locking member includes a nut 24 rotatable about the axis of the RF blade head 2, the nut 24 having a circumferentially arranged internal thread whose internal thread is adapted to the external thread of the threaded segment 13. The first locking member and the second locking member are connected by threads, thereby restricting the axial position of the second connector 21 relative to the first connector 11, so that the RF handle 1 and the RF blade head 2 are reliably assembled and connected.

[0069] Optional, such as Figure 8 and Figure 9 As shown, the RF cutter head 2 also includes an axial limiting member 25. The axial limiting member 25 may protrude from the outer peripheral wall of the cutter head body 20. Correspondingly, the nut 24 has a blocking member (not shown). The blocking member may be annularly protruding inward from the inner wall of the nut 24. It is understood that the axial limiting member 25 and the blocking member can only restrict the axial displacement of the nut 24, but not its circumferential rotation. Thus, when the nut 24 moves axially towards the RF handle 1 until the blocking member abuts against the axial limiting member 25, it can no longer move towards the RF handle 1. At this point, the nut 24 can lock the RF cutter head 2 and the RF handle 1 together through its internal thread.

[0070] For further details, please refer to... Figure 2 and Figure 4The radiofrequency surgical device further includes a second seal 32, and the radiofrequency handle 1 further includes a third stepped surface 14 facing distally. The third stepped surface 14 is arranged around the threaded section 13. The third stepped surface 14 is used to abut and seal against the nut 24 through the second seal 32, thereby forming a sealed connection between the third stepped surface 14 and the nut 24 to prevent liquids and impurities from entering the radiofrequency handle 1 and the radiofrequency blade 2 during the operation. In one example, the third stepped surface 14 is located at the proximal end of the threaded section 13, and the opening of the cavity 111 is located on the distal end face of the threaded section 13. In this way, the nut 24-second seal 32-third stepped surface 14 can form a first layer of sealing protection, and then the first stepped surface 113-first seal 31-second stepped surface 213 can form a second layer of sealing protection. The double-layer seal can effectively improve the reliability of the seal, so that the radiofrequency handle 1 is sealed to the radiofrequency blade 2 through the first seal 31 and the second seal 32. Optionally, both the first seal 31 and the second seal 32 are sealing rings made of elastic sealing materials, such as silicone sealing rings or rubber sealing rings.

[0071] Optional, please refer to Figure 9 The RF handle 1 further includes a first indicator 15, and the RF blade 2 further includes a second indicator 26. The first indicator 15 is used to circumferentially align with the second indicator 26 when the RF handle 1 and the RF blade 2 are assembled and connected. This configuration provides an indication of the insertion angle between the RF handle 1 and the RF blade 2, preventing misalignment between the first electrode connector 12 and the second electrode connector 22 when the first connector 11 and the second connector 21 are connected. The first indicator 15 and the second indicator 26 can be various indicators such as marks, grooves, or protrusions, which can be distinguished from the main body of the RF handle 1 and the RF blade 2 through structural changes, color changes, etc., for operator identification. Figure 3 and Figure 4 In the illustrated example, both the first indicator 15 and the second indicator 26 are recesses. It is understood that in other examples, the first indicator 15 and the second indicator 26 may have other structures, and they are not required to be the same.

[0072] In summary, the radiofrequency surgical device provided by the present invention includes a radiofrequency handle and a radiofrequency blade, wherein the radiofrequency handle and the radiofrequency blade are detachably connected; the radiofrequency handle includes a first connector and a first electrode connector; the radiofrequency blade includes a second connector and a second electrode connector; the first connector is used for detachably assembling and connecting with the second connector; the first connector includes a first rotation limiting portion, and the second connector includes a second rotation limiting portion; when the first connector and the second connector are assembled and connected, the first rotation limiting portion and the second rotation limiting portion are used to restrict the radiofrequency blade from rotating around itself. The axis rotates circumferentially relative to the RF handle; the first electrode connector is arranged on the first plug according to a predetermined arrangement rule, and the first electrode connector and the first rotation limiting part have a predetermined circumferential positional relationship; the second electrode connector is arranged on the second plug according to the predetermined arrangement rule, and the second electrode connector and the second rotation limiting part have a predetermined circumferential positional relationship; when the first plug and the second plug are assembled and connected, the first electrode connector and the second electrode connector are aligned with each other based on the predetermined arrangement rule to achieve electrical conduction.

[0073] This configuration allows for the detachable connection between the RF handle and the RF blade head, enabling disassembly and assembly of the RF blade head. Furthermore, based on a predetermined arrangement of the first and second electrode connectors, their alignment is ensured during assembly, ensuring electrical conductivity. This facilitates easy disassembly and assembly of the RF handle and the RF blade head, allowing for reuse and reducing material waste. It also facilitates blade head replacement, effectively improving surgical efficiency.

[0074] It should be noted that the above embodiments can be combined with each other. The above description is only a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A radiofrequency surgical device, characterized in that, The device includes an RF handle and an RF blade, the RF handle and the RF blade being detachably connected; the RF handle includes a first connector and a first electrode connector; the RF blade includes a second connector and a second electrode connector. The first connector is used to be detachably assembled with the second connector; the first connector includes a first rotation limiting part, and the second connector includes a second rotation limiting part; when the first connector and the second connector are assembled, the first rotation limiting part and the second rotation limiting part are used to restrict the circumferential rotation of the RF blade relative to the RF handle about its own axis; The first electrode connector is arranged on the first plug-in according to a predetermined arrangement rule, and the first electrode connector and the first rotation limiting part have a predetermined circumferential positional relationship; the second electrode connector is arranged on the second plug-in according to the predetermined arrangement rule, and the second electrode connector and the second rotation limiting part have a predetermined circumferential positional relationship. When the first connector and the second connector are assembled and connected, the first electrode connector and the second electrode connector are aligned with each other based on the predetermined arrangement rules to achieve electrical conduction. The radiofrequency surgical device also includes a first seal; The first connector includes a recess and a receiving cavity extending axially along the radio frequency handle. The recess is open to the distal end, and the receiving cavity is located at the proximal end of the recess. The receiving cavity communicates with the recess, and the cavity walls of both form a first stepped surface facing the distal end. The second connector includes a boss and an electrode holder extending axially along the radio frequency blade tip, the electrode holder being located at the proximal end of the boss, and the electrode holder being connected to the boss to form a second stepped surface facing the proximal end; When the first connector and the second connector are assembled and connected, the boss is adapted to be inserted into the cavity, the electrode seat is adapted to be inserted into the receiving cavity, and the first stepped surface abuts against and seals the second stepped surface through the first sealing member.

2. The radiofrequency surgical device according to claim 1, characterized in that, The radiofrequency surgical device includes multiple radiofrequency blades of different specifications; the radiofrequency handle is used to connect to one of the multiple radiofrequency blades of different specifications.

3. The radiofrequency surgical device according to claim 1, characterized in that, The first electrode connector is a female plug, which is recessed along the axial direction of the RF handle and disposed on the proximal end face of the receiving cavity; the second electrode connector is a male plug adapted to the female plug, which is protruded along the axial direction of the RF blade and disposed on the proximal end face of the electrode holder.

4. The radiofrequency surgical device according to claim 3, characterized in that, The number of the second electrode connectors is not greater than the number of the first electrode connectors; or, the radio frequency blade further includes an excitation electrode electrically connected to the second electrode connector, and the number of the excitation electrode is not greater than the number of the second electrode connectors.

5. The radiofrequency surgical device according to claim 1, characterized in that, The inner peripheral wall of the cavity is hexagonal, forming the first rotation limiting part; or, the inner peripheral wall of the cavity is circular, and the first rotation limiting part is a groove provided on the inner peripheral wall of the cavity.

6. The radiofrequency surgical device according to claim 1, characterized in that, The radio frequency handle further includes a first locking element, and the radio frequency cutter head further includes a second locking element; After the first connector and the second connector are assembled and connected, the first locking member is used to adapt and connect with the second locking member to limit the axial position of the first connector relative to the second connector.

7. The radiofrequency surgical device according to claim 6, characterized in that, The first locking member includes a threaded segment arranged axially along the RF handle, the threaded segment having a circumferentially arranged external thread; the second locking member includes a nut rotatable about the axis of the RF blade, the nut having a circumferentially arranged internal thread that is adapted to the external thread; the first locking member and the second locking member are threadedly connected to limit the axial position of the second connector relative to the first connector.

8. The radiofrequency surgical device according to claim 7, characterized in that, The radiofrequency surgical device further includes a second seal; the radiofrequency handle further includes a third stepped surface facing distally, the third stepped surface being disposed around the threaded section; the third stepped surface is used to abut against and seal the nut through the second seal.

9. The radiofrequency surgical device according to claim 1, characterized in that, The radio frequency handle further includes a first indicator, and the radio frequency blade further includes a second indicator; The first indicator is used to circumferentially align with the second indicator when the RF handle is assembled and connected to the RF blade.

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