A multi-interlocking regulated bipolar steep pulse ablation needle and ablation system

Abstract

The present invention discloses a bipolar ablation needle with multi-interlocking adjustment, 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 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 arranged inside the handle body, one end of the locking piece can be switchably connected to the electrode exposure length adjustment push button or the electrode spacing adjustment push button for transmission, and the other end of the locking piece is connected to the axial limit of the outer insulating tube fixing piece; and a front end rotary cover is also included which is connected to the locking piece for transmission, and the front end rotary cover is driven to rotate so that the locking piece can realize the switching of the interlocking relationship.

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 electrodes, also known as nanoknife electrodes, work by releasing high-voltage pulses to tumor cells through needle-shaped electrodes, causing irreversible electroporation of the cell membrane at the nanoscale, leading to cell apoptosis. After tumor cell apoptosis, phagocytes in the body devour the cell fragments, and the treated area is gradually replaced by normal tissue. Numerous clinical studies have shown that steep pulse electrodes (nano-knife electrodes) have advantages not possessed by other ablation technologies, including selective tissue ablation, destroying only "cells" without damaging blood vessel walls, nerves, trachea and bronchi, bile ducts, intestines, and ureters; the ablation zone is clearly defined, which is extremely important for the very small pancreas; ablation does not generate heat, is not dependent on heat, and is not affected by blood flow in nearby large blood vessels (such as the celiac artery and aorta); the cell death caused is not "necrosis" but apoptosis, which can stimulate an anti-tumor immune response; the treatment time is extremely short, only 5 minutes are needed to treat a 3 cm tumor, and the anesthesia time is correspondingly shortened, which is conducive to postoperative recovery.

[0003] Currently, there are two main 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 and require parallel needle placement, which is cumbersome and complex for doctors to operate and greatly limits the surgical space. For patients, the combination of multiple needles means 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 cases where fixed bipolar needles of conventional specifications and sizes 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 electrodes with adjustable spacing, and the electrodes are connected to the steep pulse device 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, so as to facilitate doctors to complete the operation flexibly and efficiently.

[0005] The first solution 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 member is further provided inside the handle body, one end of which is switchably connected to the electrode exposure length adjustment button or the electrode spacing adjustment button, and the other end of which is axially limitedly connected to the outer insulating tube fixing member.

[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 between interlocking the outer insulating tube and the inner insulating tube or interlocking the outer insulating tube and the second electrode.

[0008] Preferably, the locking member 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 distal end of the locking member is provided with two arc-shaped convex snap rings whose cross-sections are perpendicular to the length extension direction, 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 rotary cover spring arm is provided on the front end rotary cover, and a spring arm clamping point is provided at the free end of the rotary cover spring arm. Two shift clamping slots are provided on the handle body to lock the spring arm clamping point. After pressing the rotary cover spring arm to release the lock of the spring arm clamping point, the front end rotary cover is rotated so that the front end rotary cover 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 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. When adjusting, the length adjustment push button spring arms on both sides are pressed to unlock the length adjustment push button locking points to adjust the axial position; 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. When adjusting, the spacing adjustment push button spring arms on both sides are pressed to unlock the spacing adjustment push button locking points to adjust the axial position.

[0015] Preferably, an electrode length detector 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 sends the axial movement distance or axial position information of the electrode exposure length adjustment button to the host system; an electrode spacing detector is provided in the handle body, one end of which is fixedly connected to the electrode spacing adjustment button, 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.

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

[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 member, which can be switchably connected to the electrode exposure length adjustment button or the electrode spacing adjustment button, and the locking member is connected to the front end rotary cover. When the front end rotary cover is rotated, the front end rotary cover drives the locking member to rotate to achieve the switching of the locked connection with the electrode exposure length adjustment button or the electrode spacing adjustment button, thereby achieving 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 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 This is a top view of the overall structure of the ablation needle (hiding the upper cover and locking piece);

[0022] Figure 4 is a perspective view of a locking member;

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

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

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

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

[0027] Figure 9 A front view of the front screw cap and a cross-sectional view of the guide structure;

[0028] Figure 10 This is a three-dimensional diagram of the overall structure of the ablation needle (with the upper cover hidden);

[0029] Figure 11 This is a front view of the overall structure of the ablation needle (with the upper cover hidden);

[0030] Figure 12This is a cross-sectional view of the handle body of the ablation needle overall structure;

[0031] Figure 13 A perspective view of the electrode exposure length adjustment knob and a perspective view of the electrode spacing adjustment knob;

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

[0033] Figure 15 It is the front view of the upper cover;

[0034] Figure 16 Schematic diagram of the overall structure of the ablation needle and enlarged views of points Ⅰ and Ⅱ along the way;

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

[0036] Figure 18 for Figure 17 AA cross-sectional view is a cross-sectional view of the overall structure;

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

[0038] Figure 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 describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content 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 be modified or changed in various ways based on different perspectives and applications without departing from the spirit of the present invention. It should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In addition, the terms "first," "second," etc., etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features defined as "first," "second," etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0042] It should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0043] In the existing technology, minimally invasive ablation of hemorrhoids is performed directly using ablation electrodes. However, due to the small space in the lower rectum or anal canal, a single electrode is often used to ablate hemorrhoidal 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 3, the technical solution provided by this embodiment is: a multi-interlocking adjustable bipolar ablation needle, including an electrode body and an adjustment handle, the electrode body includes a first electrode 1, an inner insulating tube 2, a second electrode 3, and an outer insulating tube 4 coaxially sleeved from the inside to the outside, the adjustment handle includes 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] A locking member 11 is further provided inside the handle body. One end of the locking member 11 is switchably connected to the electrode exposure length adjustment button or the electrode spacing adjustment button 8. The other end of the locking member 11 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 outer insulating tube 4 and the inner insulating tube 2 interlocking or the outer insulating tube 4 and the second electrode 3 interlocking.

[0048] In the technical solution of this embodiment, since a locking piece 11 is provided, 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 realizing switching of the two locking relationships. When the locking member 11 is locked with the electrode exposure length adjustment knob, 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 knob, the interlocking adjustment of the outer insulating tube 4 and the inner insulating tube 2 is achieved. When the electrode exposure length adjustment knob moves forward and backward along the axis of the electrode body, the outer insulating tube fixing member 12 moves forward and backward synchronously along the axis of the electrode body, and drives the outer insulating tube 4 to move forward and backward along the axis of the electrode body. At this time, the inner insulating tube 2 and the outer insulating tube 4 move synchronously, ensuring that the exposed length of the electrode tips of the first electrode 1 and the second electrode 3 are adjusted synchronously. The exposed tip length changes, but the exposed tip length of the first electrode 1 and the second electrode 3 is always the same. The first electrode 1 and the second electrode 3 have the same controllable exposed length, which can make the range of ablation symmetrical and controllable. When the locking member 11 is locked with the electrode spacing adjustment 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 button 8, the outer insulating tube 4 and the second electrode 3 are interlocked and adjusted. When the electrode spacing adjustment button 8 moves forward and backward along the axis of the electrode body, the outer insulating tube fixing member 12 moves forward and backward synchronously along the axis of the electrode body, and drives the outer insulating tube 4 to move forward and backward along the axis 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 tip lengths of the first electrode 1 and the second electrode 3 remain the same. In clinical practice, it is convenient for doctors to determine the exposed length and electrode spacing of the electrodes according to the shape and size of the patient's tissue to be ablated. The adjustment is simple and convenient, and the exposed lengths of the first electrode 1 and the second electrode 3 are always maintained, so that the desired 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 upper cover 5 and the lower cover 6 form a receiving cavity for accommodating components such as the multi-tip 11 and the outer insulation tube fixing member 12.

[0050] Preferably, see Figure 4 、 Figure 10 、 Figure 11 、 Figure 13 and Figure 14 The locking member 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, and 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, the first locking structure cooperates with the length adjustment interlock structure 901, the second locking structure cooperates with the spacing adjustment interlock structure 801, and the locking member 11 can be switchably connected to the length adjustment interlock structure 901 or the spacing adjustment interlock structure 801 to achieve switching between the two interlock adjustment modes. During clinical operation, it can well meet the doctor's needs for adjusting the shape and size of the patient's tissue to be ablated. At least one of the first locking structure and the length adjustment interlock structure 901 has a continuously repeated structural unit with equal spacing, and at least one of the second locking structure and the spacing adjustment interlock structure 801 has a continuously repeated structural unit with equal spacing. For example, at least one of the first locking structure and the length adjustment interlock structure 901 is a continuous rack structure 1102, and at least one of the second locking structure and the spacing adjustment interlock structure 801 is a rack structure 1102. This can achieve a continuous and stable coupling relationship and provide conditions for precise adjustment of the exposed electrode length and the electrode spacing.

[0052] Preferably, see Figures 4 to 7 The distal end of the locking member 11 is provided with two arc-shaped convex snap rings 1101 whose cross-sections 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, to achieve axial positioning of the locking member 11 and the outer insulating tube fixture 12, two arcuate convex snap rings 1101 are provided on the inner side of the locking member 11, and two matching annular grooves 1201 are provided on the outer surface of the outer insulating tube fixture 12. This not only locks the locking member 11 and the outer insulating tube fixture 12 in axial position, but also prevents the outer insulating tube fixture 12 from rotating circumferentially when the locking member 11 rotates circumferentially, minimizing the relative circumferential position of the outer insulating tube 4 and the second electrode 3, thus achieving greater stability of the device. Furthermore, it facilitates assembly and 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 guidance for locking member 11 through guide structure 703, allowing stable adjustment of locking member 11 during axial displacement adjustment. Furthermore, guide structure 703 cooperates with the distal end of locking member 11 to easily drive rotation of locking member 11 when rotating the front end cap 7, thereby switching the locking relationship. This provides a stable structure and simple operation.

[0056] See also Figure 11 、 Figure 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 facilitates the switching of the interlocking structure of the locking member 11 in coordination with the rotation of the front rotary cover 7. The structure is stable. 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 10The front end rotary cover 7 coaxially passes through the electrode body and is clamped between the lower cover 6 and the upper cover 5. It is 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. The handle body is provided with two shifting slots to lock the elastic arm clamping point 702. 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 between locking with the electrode exposure length adjustment push button or locking with the electrode spacing adjustment push button 8.

[0059] The technical solution of this embodiment is that the rotary cover elastic arm 701 is set on the front rotary cover 7, which serves as a controlled component for locking and unlocking. When the elastic arm clamping point 702 on the free end of the rotary cover elastic arm 701 is engaged in any clamping slot on the handle body, the front rotary cover 7 and the locking member 11 are locked. When the rotary cover elastic arm 701 is pressed to disengage the elastic 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 to the locking member 11 and the electrode exposure length adjustment push button or the locking member 11 and the electrode spacing adjustment push button 8, thereby realizing the adjustment of the locking relationship, and the structure is stable and reliable. During adjustment, 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 axis of the electrode body, the outer insulating tube fixing member 12 moves forward and backward synchronously along the axis of the electrode body, and drives the outer insulating tube 4 to move forward and backward along the axis of the electrode body. At this time, the inner insulating tube 2 and the outer insulating tube 4 move synchronously, ensuring that the exposed length of the electrode tips of the first electrode 1 and the second electrode 3 are adjusted synchronously. The exposed tip length changes, but the exposed tip lengths of the front and rear end electrodes are always the same. Then, the electrode spacing is adjusted. The outer insulating tube fixing member 12 is interlocked and fixed with the electrode spacing adjustment button 8 via the locking member 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 member 12 moves forward and backward along the axial direction of the electrode body, 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. The second electrode 3 and the outer insulating tube 4 do not move relative to each other, 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 does not change. The exposed length of the tip of the second electrode 3 and the second electrode 3 remains unchanged. Figure 20 , showing the states after two kinds of electrode adjustment.

[0062] See also Figures 12 to 16 Preferably, length adjustment push button spring arms 902 are provided on both sides of the exposed length adjustment push button, and the free ends of the length adjustment push button spring arms 902 are provided with length adjustment push button locking points 903. 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; the electrode spacing adjustment push button 8 is provided with spacing adjustment push button spring arms 802 on both sides, and the free ends of the spacing adjustment push button spring arms 802 are provided with spacing adjustment push button locking points 803. 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 this embodiment, length adjustment button spring arms 902 are provided on both sides of the electrode exposure length adjustment button, and spacing adjustment button spring arms 802 are provided on both sides of the electrode spacing adjustment button 8, and corresponding length adjustment button locking points 903 and spacing adjustment button locking points 803 are provided. When no adjustment is performed, the electrode exposure length adjustment button or the electrode spacing adjustment button 8 is fixed in conjunction with the corresponding locking points provided on the handle body. When adjusting, it is only necessary to press the length adjustment button spring arm 902 or the spacing adjustment 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 and recommends 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 monitor 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 send 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 screened out according to the treatment effect through 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 multi-interlocking adjustable bipolar ablation needles described above.

[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 provide the optimal output parameters, 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 radiofrequency energy and other energy forms such as microwaves.

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

[0070] 1. Rotate and adjust the front end rotary cover 7 until the outer insulation tube fixing piece 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 relock it.

[0072] 3. Rotate the front rotary cover 7 until the outer insulating tube fixing piece 12 and the electrode spacing adjustment knob 8 are interlocked and fixed.

[0073] 4. Press the spacing adjustment button spring arm 802 of the electrode spacing adjustment button 8 to unlock the spacing adjustment button locking point 803, and push the electrode spacing adjustment button 8 to make the electrode spacing reach the expected value, and release the spacing adjustment button spring arm 802 to relock 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" are commonly used terms in the medical field. Specifically, the "proximal end" refers to the end closest to the operator, the "proximal surface" refers to the end surface closest to the operator, the "distal end" refers to the end farther from the operator, and the "distal surface" refers to the end surface farther from the operator.

[0076] The embodiments of the present invention have been described in detail above with reference to 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 scope of protection 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 from the inside out, characterized in that: The adjustment handle includes 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 member is further provided inside the handle body, one end of which is switchably connected to the electrode exposure length adjustment button or the electrode spacing adjustment button, and the other end of which is axially limitedly connected to the outer insulating tube fixing member. 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 between interlocking the outer insulating tube and the inner insulating tube or interlocking the outer insulating tube and 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 distal end of the locking member is provided with two arc-shaped convex snap rings whose cross-sections are perpendicular to the length extension direction. 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.

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, and the free end of the rotary cover elastic arm is provided with an elastic arm clamping point. 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: Adjusting the front end rotary cap so that the locking member is interlocked with the outer insulating tube, and the outer insulating tube and the inner insulating tube are adjusted synchronously 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 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.

8. The multi-interlocking adjustable bipolar ablation needle according to claim 1, characterized in that: Length adjustment push button spring arms are provided on both sides of the 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 corresponding locking points on the handle body to fix them. When adjusting, the length adjustment push button spring arms on both sides are pressed to unlock 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 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 sends axial movement distance or axial position information of the electrode exposure length adjustment button to the host system; An electrode spacing detector is provided in the handle body, one end of which is fixedly connected to the electrode spacing adjustment button, and the electrode spacing detector sends 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 the method according to any one of claims 1 to 9.

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