Multi-interlocking adjustment bipolar steep pulse ablation needle and ablation system

Abstract

The multi-interlocking adjustment bipolar ablation needle comprises an electrode body and an adjusting handle, the electrode body comprises a first electrode, an inner insulation tube, a second electrode and an outer insulation tube which are sequentially and coaxially arranged from inside to outside in a sleeved mode, and the adjusting handle comprises a handle body, an electrode exposure length adjusting push button, an electrode distance adjusting push button and an outer insulation tube fixing piece. The near end of the first electrode is fixedly connected with the handle body, the near end of the inner insulating tube is fixedly connected with the electrode exposure length adjusting push button, the near end of the second electrode is fixedly connected with the electrode distance adjusting push button, and the near end of the outer insulating tube is fixedly connected with the outer insulating tube fixing piece. A locking piece is further arranged in the handle body, one end of the locking piece is in transmission connection with the electrode exposure length adjusting push button or the electrode distance adjusting push button in a switchable mode, and the other end of the locking piece is in axial limiting connection with the outer insulation tube fixing piece. And the front-end screw cap is in transmission connection with the locking piece, and the front-end screw cap is driven to rotate to enable the locking piece to realize interlocking relation switching.

Description

Technical Field

[0001] The present invention relates to the technical field of steep pulse ablation, and in particular to a multi-interlocking regulated bipolar steep pulse ablation needle and an ablation system. Background Art

[0002] Steep pulse electrode, also known as nano knife, works by releasing high-voltage pulses to tumor cells through needle electrodes, causing irreversible electroporation of the cell membrane at the nanoscale, thereby leading to cell apoptosis. After tumor cell apoptosis, phagocytes in the body engulf the cell fragments, and the treated area is gradually replaced by normal tissue. Numerous clinical studies have shown that steep pulse electrode (nano knife) has advantages that other ablation techniques do not have, including selective ablation of tissues, destroying only "cells" without damaging blood vessel walls, nerves, trachea and bronchi, bile duct, intestinal tract, and ureter; clear boundaries of the ablation zone, which is extremely important for the very small pancreas; ablation does not generate heat, nor does it rely on heat, and is not affected by the blood flow of nearby large blood vessels (such as the celiac artery and aorta); the cell death caused is not "necrosis" but apoptosis, which can stimulate anti-tumor immune response; the treatment time is extremely short, and it only takes 5 minutes to treat a 3 cm tumor, and the anesthesia time is correspondingly shortened, which is conducive to postoperative recovery.

[0003] Currently, there are mainly two types of steep pulse electrodes on the market: monopolar and bipolar. Monopolar pulse electrodes are available in fixed and adjustable types, but both require the use of multiple electrodes in combination and require parallel needle arrangement. The operation is cumbersome and complicated for doctors, and the surgical space is greatly limited; for patients, multiple needles mean at least two punctures for one ablation, which causes greater puncture damage and higher surgical costs. Bipolar steep pulse electrodes are mostly fixed-size electrodes that can perform single-electrode ablation, but for patients with multiple lesions, multiple electrodes of different specifications may be required for treatment, greatly increasing the cost of surgery for patients; for doctors, there may be fixed bipolar needles of conventional specifications that cannot perfectly and accurately ablate tumors in certain dangerous areas, limiting doctors' operations and increasing risks. Existing steep pulse bipolar electrodes are fixed electrodes or adjustable-spacing electrodes, and the electrodes are connected to steep pulse equipment only as energy output accessories. Summary of the invention

[0004] The first purpose of the present invention is to provide a bipolar ablation needle and ablation system with multi-interlocking adjustment, which can realize synchronous adjustment of the front end electrode and the rear end electrode of the working end, and adjustable electrode spacing. At the same time, by converting the adjustment displacement into an electrical signal and transmitting it to the host, the host can automatically identify the working size and electrode spacing of the electrode, which is convenient for doctors to complete the operation flexibly and efficiently.

[0005] The first scheme provided by the present invention is: a multi-interlocking adjustable bipolar ablation needle, comprising an electrode body and an adjustment handle, the electrode body comprising a first electrode, an inner insulating tube, a second electrode, and an outer insulating tube coaxially sleeved in sequence from the inside to the outside, the adjustment handle comprising a handle body, an electrode exposure length adjustment push button, an electrode spacing adjustment push button, and an outer insulating tube fixing piece, the electrode exposure length adjustment push button, the electrode spacing adjustment push button, and the outer insulating tube fixing piece are respectively axially slidably connected to the handle body, the proximal end of the first electrode is fixedly connected to the handle body, the proximal end of the inner insulating tube is fixedly connected to the electrode exposure length adjustment push button, the proximal end of the second electrode is fixedly connected to the electrode spacing adjustment push button, and the proximal end of the outer insulating tube is fixedly connected to the outer insulating tube fixing piece;

[0006] A locking piece is also disposed inside the handle body, one end of which is switchably connected to the electrode exposure length adjustment push button or the electrode spacing adjustment push button, and the other end of which is axially limitedly connected to the outer insulation tube fixing piece.

[0007] The adjustment handle also includes a front end rotary cover that is partially inserted into the handle body and is transmission-connected to the locking member. The proximal end of the front end rotary cover cooperates with the distal end of the locking member to drive the front end rotary cover to rotate so that the locking member rotates circumferentially to achieve switching of the interlocking of the outer insulating tube with the inner insulating tube or the interlocking of the outer insulating tube with the second electrode.

[0008] Preferably, the locking piece is respectively provided with a first locking structure and a second locking structure on both sides along the length extension direction, the electrode exposure length adjustment push button is provided with a matching length adjustment interlocking structure on the side close to the first locking structure, and the electrode spacing adjustment push button is provided with a matching spacing adjustment interlocking structure on the side close to the second locking structure, at least one of the first locking structure and the length adjustment interlocking structure has structural units that are continuously repeated at equal intervals, and at least one of the second locking structure and the spacing adjustment interlocking structure has structural units that are continuously repeated at equal intervals.

[0009] Preferably, the locking member is provided with two arc-shaped convex snap rings with cross-sections perpendicular to the length extension direction at the distal end, and the surface of the outer insulating tube fixing member is provided with two annular grooves parallel to each other, the two convex snap rings are coupled with the two annular grooves, the cross-section of the outer insulating tube fixing member is circular, and the proximal end of the outer insulating tube is fixedly connected to the center of the cross-section of the outer insulating tube fixing member.

[0010] Preferably, the proximal end of the front rotary cover is provided with a guide structure along the length direction, and the guide structure cooperates with the distal end of the locking member to provide a guide for the axial movement of the locking member and drive the locking member to rotate circumferentially.

[0011] Preferably, the guide structure and the distal end of the locking member form a circular ring structure in cross section, and when the front rotary cover is driven to rotate, the locking member is driven to rotate through the guide structure.

[0012] Preferably, a screw cap spring arm is provided on the front end screw cap, a spring arm clamping point is provided at the free end of the screw cap spring arm, and two shift clamping slots are provided on the handle body to lock the spring arm clamping point, and after pressing the screw cap spring arm to release the lock of the spring arm clamping point, the front end screw cap is rotated so that the front end screw cap drives the locking piece to switch and lock with the electrode exposure length adjustment push button or with the electrode spacing adjustment push button.

[0013] Preferably, the front end rotary cap is adjusted so that the locking piece is interlocked with the outer insulating tube, and the outer insulating tube is adjusted synchronously with the inner insulating tube to control the first electrode and the second electrode to have the same exposed length; the front end rotary cap is adjusted so that the locking piece is interlocked with the electrode spacing adjustment button, and the outer insulating tube is interlocked and adjusted synchronously with the second electrode to control the spacing between the first electrode and the second electrode.

[0014] Preferably, length adjustment push button spring arms are provided on both sides of the electrode exposed length adjustment push button, and length adjustment push button locking points are provided at the free ends of the length adjustment push button spring arms. In the free state, the length adjustment push button locking points are engaged with the corresponding locking points on the handle body to fix them, and when adjusting, the length adjustment push button spring arms on both sides are pressed to unlock the length adjustment push button locking points for axial position adjustment; spacing adjustment push button spring arms are provided on both sides of the electrode spacing adjustment push button, and spacing adjustment push button locking points are provided at the free ends of the spacing adjustment push button spring arms. In the free state, the spacing adjustment push button locking points are engaged with the corresponding locking points on the handle body to fix them, and when adjusting, the spacing adjustment push button spring arms on both sides are pressed to unlock the spacing adjustment push button locking points for axial position adjustment.

[0015] Preferably, an electrode length detector having one end fixedly connected to the electrode exposure length adjustment push button is provided in the handle body, and the electrode length detector sends the axial movement distance or axial position information of the electrode exposure length adjustment push button to the host system; an electrode spacing detector having one end fixedly connected to the electrode spacing adjustment push button is provided in the handle body, and the electrode spacing detector sends the axial movement distance or axial position information of the electrode spacing adjustment push button to the host system; the host system performs a table lookup to recommend therapeutic electrical parameters based on the data collected by the electrode length detector and the electrode spacing detector.

[0016] Based on the same concept, the present invention also provides an ablation system, comprising any one of the above-mentioned multi-interlocking adjustable bipolar ablation needles.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The technical solution of the present invention is equipped with a locking piece, which can be switchably connected to the electrode exposure length adjustment push button or the electrode spacing adjustment push button, and the locking piece is connected to the front end rotary cover. When the front end rotary cover is rotated, the front end rotary cover drives the locking piece to rotate to switch the locking connection with the electrode exposure length adjustment push button or the electrode spacing adjustment push button, thereby realizing the switching of the two locking relationships. In clinical practice, it is convenient for doctors to determine the electrode exposure length and electrode spacing according to the shape and size of the patient's tissue to be ablated. The adjustment is simple and convenient, and the exposure length of the first electrode and the second electrode is always maintained, so that the target expected ablation range can be obtained, and the controllability is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the overall structure of a bipolar ablation needle with multi-interlock adjustment;

[0020] Figure 2 is a schematic cross-sectional view of the electrode body;

[0021] Figure 3 It is a top view of the overall structure of the ablation needle (hiding the upper cover and locking piece);

[0022] Figure 4 is a three-dimensional diagram of a locking member;

[0023] Figure 5 is a front view and a cross-sectional view of the locking member;

[0024] Figure 6 is a three-dimensional diagram of an outer insulating tube fixing member;

[0025] Figure 7 It is a three-dimensional diagram after the locking piece is connected to the outer insulating tube fixing piece;

[0026] Figure 8 A three-dimensional diagram of the front end screw cap;

[0027] Fig. 9 It is a front view of the front screw cap and a cross-sectional view of the guide structure;

[0028] Fig.10 This is a three-dimensional diagram of the overall structure of the ablation needle (hiding the upper cover);

[0029] Fig.11 This is a front view of the overall structure of the ablation needle (hiding the upper cover);

[0030] Fig.12It is a cross-sectional view of the handle body of the overall structure of the ablation needle;

[0031] Fig.13 A stereoscopic diagram of an electrode exposure length adjustment knob and a stereoscopic diagram of an electrode spacing adjustment knob;

[0032] Fig.14 It is a three-dimensional diagram of the overall structure and an enlarged diagram of points Ⅰ and Ⅱ in the figure;

[0033] Fig.15 is a front view of the upper cover;

[0034] Fig.16 This is a schematic diagram of the overall structure of the ablation needle and the enlarged views of points Ⅰ and Ⅱ on the way;

[0035] Fig.17 A top view of an embodiment of the overall structure of an ablation needle;

[0036] Fig.18 for Fig.17 AA cross-sectional view Cross-sectional view of the overall structure;

[0037] Fig.19 for Fig.17 Cross-sectional view of BB Cross-sectional view of the overall structure;

[0038] Fig. 20 Schematic diagram of two adjustment states of the ablation needle.

[0039] Description of reference numerals:

[0040] 1-first electrode; 2-inner insulating tube; 3-second electrode; 4-outer insulating tube; 5-upper cover; 6-lower cover; 7-front end screw cap; 701-screw cap elastic arm; 702-elastic arm clamping point; 703-guide structure; 8-electrode spacing adjustment button; 801-spacing adjustment interlocking structure; 802-spacing adjustment button elastic arm; 803-spacing adjustment button locking point; 9-electrode exposed length adjustment button; 901-length adjustment interlocking structure; 902-length adjustment button elastic arm; 903-length adjustment button locking point; 11-locking piece; 1101-convex snap ring; 1102-rack structure; 12-outer insulating tube fixing piece; 1201-annular groove; 13-fixing piece; 14-electrode spacing detector; 1401-spacing adjustment push rod; 15-electrode length detector; 1501-length adjustment push rod. DETAILED DESCRIPTION

[0041] The following is an explanation of the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more.

[0042] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0043] In the prior art, for minimally invasive ablation of hemorrhoids, ablation electrodes are directly used for ablation. However, due to the small space in the lower rectum or anal canal, a single electrode is often used to ablate hemorrhoid tissue, which requires the additional configuration of a negative electrode plate. This is inconvenient to operate and makes it very difficult to capture the target tissue and accurately control the ablation area.

[0044] First embodiment

[0045] See also Figures 1 to 3The technical solution provided in this embodiment is: a multi-interlocking adjustable bipolar ablation needle, comprising an electrode body and an adjustment handle, the electrode body comprising a first electrode 1, an inner insulating tube 2, a second electrode 3, and an outer insulating tube 4 coaxially sleeved in sequence from the inside to the outside, the adjustment handle comprising a handle body, an electrode exposure length adjustment push button, an electrode spacing adjustment push button 8, and an outer insulating tube fixing piece 12, the electrode exposure length adjustment push button, the electrode spacing adjustment push button 8, and the outer insulating tube fixing piece 12 are respectively axially slidably connected to the handle body, the proximal end of the first electrode 1 is fixedly connected to the handle body, the proximal end of the inner insulating tube 2 is fixedly connected to the electrode exposure length adjustment push button, the proximal end of the second electrode 3 is fixedly connected to the electrode spacing adjustment push button 8, and the proximal end of the outer insulating tube 4 is fixedly connected to the outer insulating tube fixing piece 12;

[0046] The handle body is further provided with a locking member 11, one end of which is switchably connected to the electrode exposure length adjustment push button or the electrode spacing adjustment push button 8, and the other end of which is axially limitedly connected to the outer insulating tube fixing member 12.

[0047] The adjustment handle also includes a front end rotary cover 7 that is partially inserted into the handle body and is transmission-connected to the locking member 11. The proximal end of the front end rotary cover 7 cooperates with the distal end of the locking member 11 to drive the front end rotary cover 7 to rotate so that the locking member 11 rotates circumferentially to achieve switching of the interlocking of the outer insulating tube 4 with the inner insulating tube 2 or the interlocking of the outer insulating tube 4 with the second electrode 3.

[0048] In the technical solution of this embodiment, since a locking piece 11 is configured, the locking piece 11 can be switchably connected to the electrode exposure length adjustment push button or the electrode spacing adjustment push button 8, and the locking piece 11 is connected to the front end rotary cover 7. When the front end rotary cover 7 is rotated, the front end rotary cover 7 drives the locking piece 11 to rotate to achieve switching of the locked connection with the electrode exposure length adjustment push button or the electrode spacing adjustment push button 8, thereby achieving switching of the two locking relationships. When the locking member 11 is locked with the electrode exposure length adjustment button, since the locking member 11 is connected to the outer insulating tube fixing member 12, the outer insulating tube fixing member 12 is connected to the proximal end of the outer insulating tube 4, and the locking member 11 is in transmission connection with the electrode exposure length adjustment button, the interlocking adjustment of the outer insulating tube 4 and the inner insulating tube 2 is realized. When the electrode exposure length adjustment button moves forward and backward along the axial direction of the electrode body, the outer insulating tube fixing member 12 moves forward and backward along the axial direction of the electrode body synchronously, and drives the outer insulating tube 4 to move forward and backward along the axial direction of the electrode body. At this time, the inner insulating tube 2 and the outer insulating tube 4 move synchronously, ensuring that the electrode tip exposure lengths of the first electrode 1 and the second electrode 3 are synchronously adjusted, and the exposed tip lengths change, but the exposed tip lengths of the first electrode 1 and the second electrode 3 are always the same. The first electrode 1 and the second electrode 3 have controllably identical exposed lengths, which can make the ablation range symmetrical and controllable. When the locking member 11 is locked with the electrode spacing adjustment push button 8, since the locking member 11 is connected to the outer insulating tube fixing member 12, the outer insulating tube fixing member 12 is connected to the proximal end of the outer insulating tube 4, and the locking member 11 is in transmission connection with the electrode spacing adjustment push button 8, the outer insulating tube 4 and the second electrode 3 are interlocked and adjusted. When the electrode spacing adjustment push button 8 moves forward and backward along the axial direction of the electrode body, the outer insulating tube fixing member 12 moves forward and backward along the axial direction of the electrode body synchronously, and drives the outer insulating tube 4 to move forward and backward along the axial direction of the electrode body. At this time, the second electrode 3 and the outer insulating tube 4 move synchronously, and the second electrode 3 and the outer insulating tube 4 are relatively non-displaced, ensuring that only the spacing between the second electrode 3 and the first electrode 1 is adjusted, and the tip exposure length of the second electrode 3 is not changed, and the exposed tip lengths of the first electrode 1 and the second electrode 3 are maintained the same. In clinical practice, it is convenient for doctors to determine the electrode exposure length and electrode spacing according to the shape and size of the patient's tissue to be ablated, and the adjustment is simple and convenient, and the exposure lengths of the first electrode 1 and the second electrode 3 are always maintained, so that the target expected ablation range can be obtained, and the controllability is better. For doctors, the above adjustment logic can better meet the needs of clinicians.

[0049] See also Figure 3 The fixing member 13 is fixedly connected to the proximal end of the first electrode 1, so that the overall length of the ablation needle remains unchanged. The handle body includes an upper cover 5 and a lower cover 6. The accommodating cavity formed by the upper cover 5 and the lower cover 6 is used to accommodate the multi-point 11, the outer insulation tube fixing member 12 and other components.

[0050] Preferably, see Figure 4 , Fig.10 , Fig.11 , Fig.13 and Fig.14 The locking piece 11 is respectively provided with a first locking structure and a second locking structure on both sides along the length extension direction; the electrode exposure length adjustment push button is provided with a matching length adjustment interlocking structure 901 on the side close to the first locking structure; the electrode spacing adjustment push button 8 is provided with a matching spacing adjustment interlocking structure 801 on the side close to the second locking structure; at least one of the first locking structure and the length adjustment interlocking structure 901 has structural units that are continuously repeated at equal intervals; and at least one of the second locking structure and the spacing adjustment interlocking structure 801 has structural units that are continuously repeated at equal intervals.

[0051] In the technical solution of this embodiment, since the first locking structure cooperates with the length adjustment interlocking structure 901, the second locking structure cooperates with the spacing adjustment interlocking structure 801, and the locking member 11 can be switchably connected with the length adjustment interlocking structure 901 or the spacing adjustment interlocking structure 801 for transmission connection, the switching of the two interlocking adjustment modes can be realized, and the doctor's needs for adjusting the shape and size of the patient's tissue to be ablated can be well met during clinical operation. At least one of the first locking structure and the length adjustment interlocking structure 901 has a structural unit that is continuously repeated at equal intervals, and at least one of the second locking structure and the spacing adjustment interlocking structure 801 has a structural unit that is continuously repeated at equal intervals. For example, at least one of the first locking structure and the length adjustment interlocking structure 901 is a continuous rack structure 1102, and at least one of the second locking structure and the spacing adjustment interlocking structure 801 is a rack structure 1102, so that a continuous and stable coupling relationship can be satisfied, and conditions are provided for the precise adjustment of the exposed length of the electrode and the spacing between the electrodes.

[0052] Preferably, see Figures 4 to 7 The locking member 11 is provided with two arc-shaped convex snap rings 1101 at the distal end, and the cross-sections thereof are perpendicular to the length extension direction. The surface of the outer insulating tube fixing member 12 is provided with two annular grooves 1201 parallel to each other. The two convex snap rings 1101 are coupled with the two annular grooves 1201. The cross-section of the outer insulating tube fixing member 12 is circular, and the proximal end of the outer insulating tube 4 is fixedly connected to the center of the cross-section of the outer insulating tube fixing member 12.

[0053] In the technical solution of this embodiment, in order to achieve the axial position fixation of the locking member 11 and the outer insulating tube fixing member 12, two arc-shaped convex snap rings 1101 are arranged on the inner side of the locking member 11, and two matching annular grooves 1201 are arranged on the outer surface of the outer insulating tube fixing member 12. Thus, the axial position of the locking member 11 and the outer insulating tube fixing member 12 is locked, and the outer insulating tube fixing member 12 is not prompted to rotate circumferentially when the locking member 11 rotates circumferentially, so that the circumferential position of the outer insulating tube 4 and the second electrode 3 does not change relative to each other as much as possible, and the device can obtain better stability. It is also easy to assemble during assembly, which improves production efficiency.

[0054] See also Figures 8 to 10 Preferably, the proximal end of the front rotary cover 7 is provided with a guide structure 703 along the length direction, and the guide structure 703 cooperates with the distal end of the locking member 11 to provide a guide for the axial movement of the locking member 11 and drive the locking member 11 to rotate circumferentially.

[0055] The technical solution of this embodiment provides a guiding function for the locking member 11 through the guiding structure 703, so that the locking member 11 can be stably adjusted during the axial displacement adjustment process. In addition, the guiding structure 703 cooperates with the distal end of the locking member 11 so that the locking member 11 can be driven to rotate when the front end rotary cover 7 is rotated, thereby realizing the switching of the locking relationship, and the structure is stable and the operation is simple.

[0056] See also Fig.11 , Fig.12 Preferably, the guide structure 703 and the distal end of the locking member 11 form a circular ring structure in cross section, and when the front rotary cover 7 is driven to rotate, the locking member 11 is driven to rotate through the guide structure 703.

[0057] The technical solution of this embodiment forms a circular ring structure with the distal end of the locking member 11 and the guide structure 703 in the cross section, which is convenient for switching the interlocking structure of the locking member 11 in coordination with the rotation of the front rotary cover 7. The structure is stable, and since the distal end of the locking member 11 and the guide structure 703 can form a circular ring in the cross section, a more uniform transmission force can be obtained.

[0058] See also Figures 8 to 10, the front end rotary cover 7 coaxially passes through the electrode body and is clamped between the lower cover 6 and the upper cover 5, axially limited, and can rotate in a circular motion. Preferably, the front end rotary cover 7 is provided with a rotary cover elastic arm 701, and the free end of the rotary cover elastic arm 701 is provided with an elastic arm clamping point 702, and the handle body is provided with two shifting clamping grooves to lock the elastic arm clamping point 702, and after pressing the rotary cover elastic arm 701 to release the lock of the elastic arm clamping point 702, the front end rotary cover 7 is rotated so that the front end rotary cover 7 drives the locking member 11 to switch to lock with the electrode exposure length adjustment push button or lock with the electrode spacing adjustment push button 8.

[0059] The technical solution of this embodiment is that the screw cap spring arm 701 provided on the front screw cap 7 serves as a controlled component for locking and unlocking. When the spring arm clamping point 702 on the free end of the screw cap spring arm 701 is engaged in any clamping slot on the handle body, the front screw cap 7 and the locking member 11 are locked. When the screw cap spring arm 701 is pressed to disengage the spring arm clamping point 702 from any clamping slot on the handle body, the locking state is released, thereby enabling interlocking gear shifting.

[0060] Preferably, the front end rotary cap 7 is adjusted so that the locking piece 11 is interlocked with the outer insulating tube 4, and the outer insulating tube 4 is adjusted synchronously with the inner insulating tube 2 to control the first electrode 1 and the second electrode 3 to have the same exposed length; the front end rotary cap 7 is adjusted so that the locking piece 11 is interlocked with the electrode spacing adjustment button 8, and the outer insulating tube 4 is interlocked and adjusted synchronously with the second electrode 3 to control the spacing between the first electrode 1 and the second electrode 3.

[0061] The transmission relationship of the technical solution of this embodiment is sequentially from the front end rotary cover 7 to the locking member 11, and then the locking member 11 is locked with the electrode exposure length adjustment push button or the locking member 11 is locked with the electrode spacing adjustment push button 8, thereby realizing the adjustment of the locking relationship, and the structure is stable and reliable. When adjusting, the electrode exposure length is adjusted first, and the outer insulating tube fixing member 12 is interlocked and fixed with the electrode exposure length adjustment push button through the locking member 11. When the electrode exposure length adjustment push button moves forward and backward along the axial direction of the electrode body, the outer insulating tube fixing member 12 moves forward and backward along the axial direction of the electrode body synchronously, and drives the outer insulating tube 4 to move forward and backward along the axial direction of the electrode body. At this time, the inner insulating tube 2 and the outer insulating tube 4 move synchronously, ensuring that the electrode tip exposure lengths of the first electrode 1 and the second electrode 3 are adjusted synchronously, and the exposed tip lengths change, but the exposed tip lengths of the front and rear end electrodes are always the same. Then adjust the electrode spacing, the outer insulating tube fixing part 12 and the electrode spacing adjustment button 8 are interlocked and fixed by the locking part 11. When the electrode spacing adjustment button 8 moves forward and backward along the axial direction of the electrode body, the outer insulating tube fixing part 12 moves forward and backward along the axial direction of the electrode body synchronously, and drives the outer insulating tube 4 to move forward and backward along the axial direction of the electrode body. At this time, the second electrode 3 and the outer insulating tube 4 move synchronously, and the second electrode 3 and the outer insulating tube 4 are relatively non-displaced, ensuring that only the spacing between the second electrode 3 and the first electrode 1 is adjusted, and the exposed length of the tip of the second electrode 3 is not changed. The exposed length of the tip of the second electrode 3 and the second electrode 3 does not change and is always the same. Fig. 20 , showing the states of two electrodes after adjustment.

[0062] See also Figures 12 to 16 Preferably, length adjustment push button spring arms 902 are provided on both sides of the electrode exposed length adjustment push button, and length adjustment push button locking points 903 are provided at the free ends of the length adjustment push button spring arms 902. In the free state, the length adjustment push button locking points 903 are engaged with the corresponding locking points on the handle body for fixation. When adjusting, the length adjustment push button spring arms 902 on both sides are pressed to unlock the length adjustment push button locking points 903 for axial position adjustment; spacing adjustment push button spring arms 802 are provided on both sides of the electrode spacing adjustment push button 8, and spacing adjustment push button locking points 803 are provided at the free ends of the spacing adjustment push button spring arms 802. In the free state, the spacing adjustment push button locking points 803 are engaged with the corresponding locking points on the handle body for fixation. When adjusting, the spacing adjustment push button spring arms 802 on both sides are pressed to unlock the spacing adjustment push button locking points 803 for axial position adjustment.

[0063] In the technical solution of the present embodiment, length adjustment push button spring arms 902 are provided on both sides of the electrode exposure length adjustment push button, and spacing adjustment push button spring arms 802 are provided on both sides of the electrode spacing adjustment push button 8, and corresponding length adjustment push button locking points 903 and spacing adjustment push button locking points 803 are provided, and the corresponding locking points provided on the handle body are used to fix the electrode exposure length adjustment push button or the electrode spacing adjustment push button 8 when no adjustment is performed. When adjusting, it is only necessary to press the length adjustment push button spring arm 902 or the spacing adjustment push button spring arm 802 to lock the contact position for adjustment, thereby making the structure more stable.

[0064] See also Figures 17 to 19 Preferably, an electrode length detector 15 is provided in the handle body, one end of which is fixedly connected to the electrode exposure length adjustment button, and the electrode length detector 15 sends the axial movement distance or axial position information of the electrode exposure length adjustment button to the host system; an electrode spacing detector 14 is provided in the handle body, one end of which is fixedly connected to the electrode spacing adjustment button 8, and the electrode spacing detector 14 sends the axial movement distance or axial position information of the electrode spacing adjustment button 8 to the host system; the host system performs a table lookup to recommend therapeutic electrical parameters based on the data collected by the electrode length detector 15 and the electrode spacing detector 14.

[0065] The technical solution of this embodiment corresponds to the electrode length detector 15 of the electrode exposure length adjustment button and the electrode spacing detector 14 corresponding to the electrode spacing adjustment button 8, which monitors the axial movement distance or axial position information of the electrode exposure length adjustment button and the axial movement distance or axial position information of the electrode spacing adjustment button 8 in real time and sends them to the host system. The host system recommends treatment parameters based on this information. Specifically, a table lookup mode can be adopted. The table can be the appropriate treatment parameters selected according to the treatment effect after multiple experiments in advance, and then written into the table for recommendation.

[0066] Based on the same concept, the present invention also provides an ablation system, comprising any one of the above-mentioned multi-interlocking adjustable bipolar ablation needles.

[0067] The ablation system of this embodiment can achieve synchronous adjustment of the first electrode 1 and the second electrode 3 at its working end, and the spacing between the first electrode 1 and the second electrode 3 can be adjusted. At the same time, by converting the adjustment displacement into an electrical signal and transmitting it to the host, the host can automatically identify the working size of the electrode and the electrode spacing, and give the optimal output parameters, thereby helping doctors to complete the operation flexibly and efficiently.

[0068] It should be noted that the adjustment method provided in this embodiment is not a treatment method in the actual treatment process, but a method used in the test or verification process. The multi-interlocking adjustable bipolar ablation needle of the present invention is not only applicable to steep pulse energy, but also to radio frequency energy and other energy forms such as microwaves.

[0069] The following is an exemplary description of the use process of the ablation needle of the present invention to better explain the advantages of the ablation needle of the present invention:

[0070] 1. Rotate and adjust the front end rotary cover 7 until the outer insulating tube fixing part 12 and the electrode exposure length adjustment knob 9 are interlocked and fixed.

[0071] 2. Press the length adjustment push button spring arm 902 of the electrode exposure length adjustment push button 9 to unlock the length adjustment push button locking point 903, and push the electrode exposure length adjustment push button 9 to make the electrode tip exposure length reach the expected value, and release the length adjustment push button spring arm 902 to re-lock it.

[0072] 3. Rotate the front end rotary cover 7 to adjust the outer insulating tube fixing part 12 and the electrode spacing adjustment knob 8 to an interlocking and fixed state.

[0073] 4. Press the spacing adjustment push button spring arm 802 of the electrode spacing adjustment push button 8 to unlock the spacing adjustment push button locking point 803, and push the electrode spacing adjustment push button 8 to make the electrode spacing reach the expected value, and release the spacing adjustment push button spring arm 802 to re-lock it.

[0074] 5. Complete the adjustment of the exposed tip length and electrode spacing of the bipolar electrode.

[0075] In addition, in the description of this application, the "proximal end" and "distal end" of "proximal end" are commonly used terms in the medical field. Specifically, the "proximal end" is the end close to the operator, the "proximal end surface" is the end surface close to the operator, the "distal end" is the end away from the operator, and the "distal end surface" is the end surface away from the operator.

[0076] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A multi-interlocking adjustable bipolar ablation needle, comprising an electrode body and an adjustment handle, wherein the electrode body comprises a first electrode, an inner insulating tube, a second electrode, and an outer insulating tube coaxially sleeved in sequence from inside to outside, characterized in that: The adjustment handle comprises a handle body, an electrode exposure length adjustment push button, an electrode spacing adjustment push button and an outer insulating tube fixing piece, wherein the electrode exposure length adjustment push button, the electrode spacing adjustment push button and the outer insulating tube fixing piece are respectively axially slidably connected to the handle body, the proximal end of the first electrode is fixedly connected to the handle body, the proximal end of the inner insulating tube is fixedly connected to the electrode exposure length adjustment push button, the proximal end of the second electrode is fixedly connected to the electrode spacing adjustment push button, and the proximal end of the outer insulating tube is fixedly connected to the outer insulating tube fixing piece; A locking piece is also disposed inside the handle body, one end of which is switchably connected to the electrode exposure length adjustment push button or the electrode spacing adjustment push button, and the other end of which is axially limitedly connected to the outer insulation tube fixing piece. The adjustment handle also includes a front end rotary cover that is partially inserted into the handle body and is transmission-connected to the locking member. The proximal end of the front end rotary cover cooperates with the distal end of the locking member to drive the front end rotary cover to rotate so that the locking member rotates circumferentially to achieve switching of the interlocking of the outer insulating tube with the inner insulating tube or the interlocking of the outer insulating tube with the second electrode.

2. The multi-interlocking adjustable bipolar ablation needle according to claim 1, characterized in that: The locking piece is respectively provided with a first locking structure and a second locking structure on both sides along the length extension direction; the electrode exposure length adjustment push button is provided with a matching length adjustment interlocking structure on the side close to the first locking structure; the electrode spacing adjustment push button is provided with a matching spacing adjustment interlocking structure on the side close to the second locking structure; at least one of the first locking structure and the length adjustment interlocking structure has structural units that are continuously repeated at equal intervals; and at least one of the second locking structure and the spacing adjustment interlocking structure has structural units that are continuously repeated at equal intervals.

3. The multi-interlocking adjustable bipolar ablation needle according to claim 1, characterized in that: The locking piece is provided with two arc-shaped convex snap rings with cross sections perpendicular to the length extension direction at the far end, and the surface of the outer insulating tube fixing piece is provided with two annular grooves parallel to each other, and the two convex snap rings are coupled with the two annular grooves. The cross section of the outer insulating tube fixing piece is circular, and the proximal end of the outer insulating tube is fixedly connected to the center of the cross section of the outer insulating tube fixing piece.

4. The multi-interlocking adjustable bipolar ablation needle according to claim 1, characterized in that: The proximal end of the front rotary cover is provided with a guide structure along the length direction, and the guide structure cooperates with the distal end of the locking member to provide a guide for the axial movement of the locking member and drive the locking member to rotate circumferentially.

5. The multi-interlocking adjustable bipolar ablation needle according to claim 4, characterized in that: The guide structure and the distal end of the locking member form a circular ring structure in cross section, and when the front rotary cover is driven to rotate, the locking member is driven to rotate through the guide structure.

6. The multi-interlocking adjustable bipolar ablation needle according to claim 1, characterized in that: The front end rotary cover is provided with a rotary cover elastic arm, the free end of the rotary cover elastic arm is provided with an elastic arm clamping point, and the handle body is provided with two shift clamping slots to lock the elastic arm clamping point. After pressing the rotary cover elastic arm to release the lock of the elastic arm clamping point, the front end rotary cover is rotated so that the front end rotary cover drives the locking member to switch and lock with the electrode exposure length adjustment push button or with the electrode spacing adjustment push button.

7. The multi-interlocking adjustable bipolar ablation needle according to claim 1, characterized in that: The front end rotary cover is adjusted so that the locking member is interlocked with the outer insulating tube, and the outer insulating tube is adjusted synchronously with the inner insulating tube to control the first electrode and the second electrode to have the same exposed length; The front end rotary cover is adjusted to interlock the locking member with the electrode spacing adjustment knob, and the outer insulating tube is interlocked and adjusted synchronously with the second electrode to control the spacing between the first electrode and the second electrode.

8. The multi-interlocking adjustable bipolar ablation needle according to claim 1, characterized in that: Length adjustment push button spring arms are arranged on both sides of the electrode exposed length adjustment push button, and length adjustment push button locking points are arranged at the free ends of the length adjustment push button spring arms. In the free state, the length adjustment push button locking points are engaged with the corresponding locking points on the handle body to be fixed. When adjusting, the length adjustment push button spring arms on both sides are pressed to release the length adjustment push button locking points to adjust the axial position; Spacing adjustment button spring arms are provided on both sides of the electrode spacing adjustment button, and spacing adjustment button locking points are provided at the free ends of the spacing adjustment button spring arms. In the free state, the spacing adjustment button locking points are engaged with the corresponding locking points on the handle body to fix them. When adjusting, the spacing adjustment button spring arms on both sides are pressed to unlock the spacing adjustment button locking points to adjust the axial position.

9. The multi-interlocking adjustable bipolar ablation needle according to claim 1, characterized in that: An electrode length detector having one end fixedly connected to the electrode exposure length adjustment push button is disposed in the handle body, and the electrode length detector sends axial movement distance or axial position information of the electrode exposure length adjustment push button to the host system; An electrode spacing detector having one end fixedly connected to the electrode spacing adjustment button is disposed in the handle body, and the electrode spacing detector sends the axial movement distance or axial position information of the electrode spacing adjustment button to the host system; The host system performs a table lookup to recommend therapeutic electrical parameters based on the data collected by the electrode length detector and the electrode spacing detector.

10. An ablation system, characterized in that: A multi-interlocking adjustable bipolar ablation needle comprising any one of claims 1 to 9.

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