A multi-interlock adjustable bipolar steep pulse ablation needle and ablation system

Abstract

This invention discloses a bipolar ablation needle with multi-interlock adjustment, comprising an electrode body and an adjustment handle. The electrode body includes a first electrode, an inner insulating tube, a second electrode, and an outer insulating tube coaxially arranged from the inside to the outside. The adjustment handle includes a handle body, an electrode exposure length adjustment knob, an electrode spacing adjustment knob, and an outer insulating tube fixing component. 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 knob, the proximal end of the second electrode is fixedly connected to the electrode spacing adjustment knob, and the proximal end of the outer insulating tube is fixedly connected to the outer insulating tube fixing component. A locking component is also configured inside the handle body. One end of the locking component is switchably connected to either the electrode exposure length adjustment knob or the electrode spacing adjustment knob, and the other end of the locking component is axially limited by the outer insulating tube fixing component. A front-end cap is also included, which is connected to the locking component. Driving the front-end cap to rotate allows the locking component to switch its interlocking relationship.

Description

Technical Field

[0001] This invention relates to the field of steep pulse ablation technology, and particularly to a bipolar steep pulse ablation needle and ablation system with multi-interlock adjustment. Background Technology

[0002] The steep pulse electrode, also known as the nanoknife, works by releasing high-voltage pulses into tumor cells through a needle-like electrode. This causes irreversible electroporation at the nanoscale in the cell membrane, leading to apoptosis. After apoptosis, phagocytes engulf the cell debris, and the treated area is gradually replaced by normal tissue. Numerous clinical studies have shown that the steep pulse electrode (nanoknife) has advantages not found in other ablation techniques, including selective tissue ablation, destroying only cells without damaging blood vessel walls, nerves, trachea and bronchi, bile ducts, intestines, or ureters; clear ablation zone boundaries, which is extremely important for the small pancreas; ablation does not generate heat and 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 induced cell death is not necrosis but apoptosis, which can stimulate an anti-tumor immune response; and the treatment time is extremely short, requiring only 5 minutes to treat a 3 cm tumor, with correspondingly shorter anesthesia time, which is beneficial for 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 versions, but both require multiple electrodes and parallel needle placement, making the procedure cumbersome and complex for doctors, and significantly limiting surgical space. For patients, multiple needles mean at least two punctures for a single ablation, resulting in greater puncture damage and higher surgical costs. Bipolar steep pulse electrodes are mostly fixed-size electrodes, allowing for single-electrode ablation. However, for patients with multiple lesions, multiple electrodes of different sizes may be needed, significantly increasing surgical costs. For doctors, standard-sized fixed bipolar needles may not be able to perfectly and accurately ablate tumors in certain dangerous areas, limiting surgical options and increasing risks. Existing steep pulse bipolar electrodes are either fixed or adjustable-pitch electrodes, and their connection to the steep pulse device is only as an energy output accessory. Summary of the Invention

[0004] The primary objective of this invention is to provide a multi-interlocking adjustable bipolar ablation needle and ablation system, which enables synchronous adjustment of the front and rear electrodes of the working end, and adjustable electrode spacing. Simultaneously, 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 electrodes and the electrode spacing, facilitating doctors to perform surgery flexibly and efficiently.

[0005] The first solution provided by this invention is: a multi-interlocking adjustable bipolar ablation needle, comprising an electrode body and an adjusting handle. The electrode body includes a first electrode, an inner insulating tube, a second electrode, and an outer insulating tube coaxially sleeved from the inside to the outside. The adjusting handle includes a handle body, an electrode exposure length adjusting knob, an electrode spacing adjusting knob, and an outer insulating tube fixing component. The electrode exposure length adjusting knob, the electrode spacing adjusting knob, and the outer insulating tube fixing component are 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 adjusting knob, the proximal end of the second electrode is fixedly connected to the electrode spacing adjusting knob, and the proximal end of the outer insulating tube is fixedly connected to the outer insulating tube fixing component.

[0006] The handle body is also equipped with a locking component. One end of the locking component is switchably connected to the electrode exposure length adjustment push button or the electrode spacing adjustment push button, and the other end of the locking component is axially limited by the outer insulating tube fixing component.

[0007] The adjustment handle also includes a front end cap partially inserted inside the handle body and connected to the locking member in a transmission manner. The proximal end of the front end cap engages with the distal end of the locking member, driving the front end cap to rotate so that the locking member rotates circumferentially, thereby achieving the 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 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 cooperating length adjustment interlocking structure on the side near the first locking structure, the electrode spacing adjustment push button is provided with a cooperating spacing adjustment interlocking structure on the side near the second locking structure, at least one of the first locking structure and the length adjustment interlocking structure has a structural unit with equal spacing and continuous repetition, and at least one of the second locking structure and the spacing adjustment interlocking structure has a structural unit with equal spacing and continuous repetition.

[0009] Preferably, the locking member has two arc-shaped convex retaining rings with cross-sections perpendicular to the length extension direction at its distal end, and the surface of the outer insulating tube fixing member has two parallel annular grooves. The two convex retaining rings are coupled to 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 cap is provided with a guide structure along the length direction, the guide structure cooperating with the distal end of the locking member to provide guidance 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 structure in cross-section, and when the front end cap is driven to rotate, the locking member is driven to rotate through the guide structure.

[0012] Preferably, the front cap is provided with a cap spring arm, the free end of the cap spring arm is provided with a spring arm locking point, and the handle body is provided with two shifting slots to lock the spring arm locking point. After pressing the cap spring arm to release the locking of the spring arm locking point, the front cap is rotated so that the front cap drives the locking member to switch between locking with the electrode exposure length adjustment push button or locking with the electrode spacing adjustment push button.

[0013] Preferably, the front end cap is adjusted to interlock the locking member 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 cap is adjusted to interlock the locking member with the electrode spacing adjustment knob, and the outer insulating tube is adjusted synchronously with the second electrode to control the spacing between the first electrode and the second electrode.

[0014] Preferably, the electrode exposure length adjustment push button has length adjustment push button spring arms on both sides, and the free end of the length adjustment push button spring arms has a length adjustment push button locking point. In the free state, the length adjustment push button locking point engages with the corresponding locking point on the handle body to fix it. During adjustment, pressing the length adjustment push button spring arms on both sides will release the length adjustment push button locking point to adjust the axial position. The electrode spacing adjustment push button has spacing adjustment push button spring arms on both sides, and the free end of the spacing adjustment push button spring arms has a spacing adjustment push button locking point. In the free state, the spacing adjustment push button locking point engages with the corresponding locking point on the handle body to fix it. During adjustment, pressing the spacing adjustment push button spring arms on both sides will release the spacing adjustment push button locking point to adjust the axial position.

[0015] Preferably, the handle body is provided with an electrode length detector, one end of which is fixedly connected to the electrode exposure length adjustment push button. 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. The handle body is also provided with an electrode spacing detector, one end of which is fixedly connected to the electrode spacing adjustment push button. 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 recommends therapeutic electrical parameters based on the data collected by the electrode length detector and the electrode spacing detector by looking up a table.

[0016] Based on the same concept, the present invention also provides an ablation system, including the multi-interlocked bipolar ablation needle described in any one of the above.

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

[0018] The technical solution of this invention incorporates a locking component that can be switched between the electrode exposure length adjustment knob and the electrode spacing adjustment knob. Furthermore, the locking component is connected to the front cap. When the front cap is rotated, it drives the locking component to rotate, switching the locking connection between the two knobs. This allows for switching between two locking relationships. In clinical practice, this facilitates doctors in determining the electrode exposure length and electrode spacing based on the shape and size of the tissue to be ablated. Adjustment is simple and convenient, maintaining the exposure length of both the first and second electrodes, thus achieving the desired ablation range and providing better controllability. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a bipolar ablation needle with multiple interlocking adjustment;

[0020] Figure 2 This is a schematic diagram of the cross-section of the electrode body;

[0021] Figure 3 A top view of the overall structure of the ablation needle (hiding the top cover and locking mechanism);

[0022] Figure 4 A 3D view of the locking component;

[0023] Figure 5 The front view and cross-sectional view of the locking component;

[0024] Figure 6 This is a three-dimensional view of the external insulating tube fixing component;

[0025] Figure 7 This is a three-dimensional view of the locking component and the outer insulating tube fixing component after connection;

[0026] Figure 8 A 3D view of the front screw cap;

[0027] Figure 9 The front view of the front cap and the cross-sectional view of the guide structure are shown.

[0028] Figure 10 A 3D view of the overall structure of the ablation needle (top cover hidden);

[0029] Figure 11 A front view of the overall structure of the ablation needle (top cover hidden);

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

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

[0032] Figure 14 The diagram includes a 3D view of the overall structure and enlarged views of points I and II in the diagram.

[0033] Figure 15 This is a front view of the top cover;

[0034] Figure 16 A schematic diagram of the overall structure of the ablation needle and enlarged views of points I and II in the diagram;

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

[0036] Figure 18 for Figure 17 A sectional view of the overall structure of AA;

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

[0038] Figure 20 This is a schematic diagram showing the two adjustment states of the ablation needle.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1-First electrode; 2-Second electrode; 3-Inner insulating tube; 4-Outer insulating tube; 5-Upper cover; 6-Lower cover; 7-Front end cap; 701-Cap spring arm; 702-Spring arm locking point; 703-Guide structure; 8-Electrode spacing adjustment push button; 801-Spacing adjustment interlock structure; 802-Spacing adjustment push button spring arm; 803-Spacing adjustment push button locking point; 9-Electrode exposed length adjustment push button; 901-Length adjustment interlock structure; 902-Length adjustment push button spring arm; 903-Length adjustment push button locking point; 11-Locking component; 1101-Protruding retaining ring; 1102-Rack and pinion structure; 12-Outer insulating tube fixing component; 1201-Annular groove; 13-Fixing component; 14-Electrode spacing detector; 1401-Spacing adjustment push rod; 15-Electrode length detector; 1501-Length adjustment push rod. Detailed Implementation

[0041] The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand 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 various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0042] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

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

[0044] First Embodiment

[0045] See Figures 1 to 3The technical solution provided in this embodiment is as follows: 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 3, a second electrode 2, and an outer insulating tube 4, which are 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 member 12. The electrode exposure length adjustment push button, the electrode spacing adjustment push button 8, and the outer insulating tube fixing member 12 are 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 3 is fixedly connected to the electrode exposure length adjustment push button. The proximal end of the second electrode 2 is fixedly connected to the electrode spacing adjustment push button 8. The proximal end of the outer insulating tube 4 is fixedly connected to the outer insulating tube fixing member 12.

[0046] The handle body is also equipped with a locking component 11. One end of the locking component 11 is switchably connected to the electrode exposure length adjustment push button or the electrode spacing adjustment push button 8, and the other end of the locking component 11 is axially limited connected to the outer insulating tube fixing component 12.

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

[0048] In this embodiment, a locking component 11 is configured. The locking component 11 can be switched to be connected to the electrode exposure length adjustment push button or the electrode spacing adjustment push button 8. The locking component 11 is also connected to the front end cap 7. When the front end cap 7 is rotated, the front end cap 7 drives the locking component 11 to rotate, thereby switching the locking connection with the electrode exposure length adjustment push button or the electrode spacing adjustment push button 8, thus achieving the switching between the two locking relationships. When the locking member 11 is locked to the electrode exposure length adjustment knob, since the locking member 11 is connected to the outer insulating tube fixing member 12, and 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 drivenly connected to the electrode exposure length adjustment knob, the interlocking adjustment of the outer insulating tube 4 and the inner insulating tube 3 is realized. When the electrode exposure length adjustment knob moves back and forth along the electrode body axis, the outer insulating tube fixing member 12 moves back and forth synchronously along the electrode body axis, and drives the outer insulating tube 4 to move back and forth along the electrode body axis. At this time, the inner insulating tube 3 and the outer insulating tube 4 move synchronously, ensuring that the electrode tip exposure lengths of the first electrode 1 and the second electrode 2 are adjusted synchronously. The exposure tip length changes, but the exposure tip lengths of the first electrode 1 and the second electrode 2 are always the same. The first electrode 1 and the second electrode 2 have controllable identical exposed lengths, which makes the ablation range symmetrical and controllable. When the locking element 11 is locked to the electrode spacing adjustment knob 8, since the locking element 11 is connected to the outer insulating tube fixing element 12, and the outer insulating tube fixing element 12 is connected to the proximal end of the outer insulating tube 4, and the locking element 11 is connected to the electrode spacing adjustment knob 8, the outer insulating tube 4 and the second electrode 2 are interlocked and adjusted. When the electrode spacing adjustment knob 8 moves back and forth along the electrode body axis, the outer insulating tube fixing element 12 moves back and forth synchronously along the electrode body axis, and drives the outer insulating tube 4 to move back and forth along the electrode body axis. At this time, the second electrode 2 and the outer insulating tube 4 move synchronously, and there is no relative displacement between the second electrode 2 and the outer insulating tube 4, ensuring that only the distance between the second electrode 2 and the first electrode 1 is adjusted, without changing the exposed tip length of the second electrode 2. The exposed tip lengths of the first electrode 1 and the second electrode 2 remain the same. In clinical practice, this allows doctors to determine the exposed length and electrode spacing of the electrodes according to the shape and size of the tissue to be ablated. The adjustment is simple and convenient, and the exposed lengths of the first electrode 1 and the second electrode 2 are always maintained, thereby obtaining the desired ablation range and improving controllability. For doctors, the above adjustment logic is more in line with the needs of clinicians.

[0049] See 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 components such as the multi-point 11 and the outer insulating tube fixing member 12.

[0050] Preferred, see Figure 4 , Figure 10 , Figure 11 , Figure 13 and Figure 14 The locking member 11 is provided with a first locking structure and a second locking structure on both sides along its length extension direction. The electrode exposure length adjustment push button is provided with a cooperating length adjustment interlocking structure 901 on the side near the first locking structure. The electrode spacing adjustment push button 8 is provided with a cooperating spacing adjustment interlocking structure 801 on the side near the second locking structure. At least one of the first locking structure and the length adjustment interlocking structure 901 has a structural unit with equal spacing and continuous repetition. At least one of the second locking structure and the spacing adjustment interlocking structure 801 has a structural unit with equal spacing and continuous repetition.

[0051] In this embodiment, the first locking structure cooperates with the length adjustment interlocking structure 901, and the second locking structure cooperates with the spacing adjustment interlocking structure 801. Furthermore, the locking member 11 can be switched to cooperate with either the length adjustment interlocking structure 901 or the spacing adjustment interlocking structure 801 for transmission, thereby enabling switching between two interlocking adjustment modes. This effectively meets the needs of doctors to adjust the shape and size of the tissue to be ablated during clinical operations. At least one of the first locking structure and the length adjustment interlocking structure 901 has equally spaced, continuously repeating structural units, and at least one of the second locking structure and the spacing adjustment interlocking structure 801 also has equally spaced, continuously repeating structural units. 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, thus ensuring a continuous and stable coupling relationship and providing conditions for precise adjustment of the electrode exposure length and electrode spacing.

[0052] Preferred, see Figures 4 to 7 The locking member 11 has two arc-shaped convex retaining rings 1101 with cross-sections perpendicular to the length extension direction at its distal end. The outer insulating tube fixing member 12 has two parallel annular grooves 1201 on its surface. The two convex retaining rings 1101 are coupled to the two annular grooves 1201. The cross-section of the outer insulating tube fixing member 12 is circular. 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 this embodiment, to fix the axial position of the locking member 11 and the outer insulating tube fixing member 12, two arc-shaped convex retaining 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 fixing member 12. This achieves both axial locking of the locking member 11 and the outer insulating tube fixing member 12 and prevents the outer insulating tube fixing member 12 from rotating circumferentially when the locking member 11 rotates circumferentially, minimizing the relative change in the circumferential position of the outer insulating tube 4 and the second electrode 2, thus improving the stability of the device. Furthermore, it facilitates assembly and improves production efficiency.

[0054] See Figures 8 to 10 Preferably, the proximal end of the front end cap 7 is provided with a guide structure 703 along the length direction. The guide structure 703 cooperates with the distal end of the locking member 11 to provide guidance 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 uses the guide structure 703 to provide guidance for the locking member 11, so that the locking member 11 can be stably adjusted during the axial displacement adjustment process. Furthermore, the guide structure 703 cooperates with the distal end of the locking member 11, so as to easily drive the locking member 11 to rotate when the front end cap 7 is rotated, thereby realizing the switching of the locking relationship. The structure is stable and the operation is simple.

[0056] See Figure 11 , Figure 12 Preferably, the guide structure 703 and the far end of the locking member 11 form a circular structure in cross-section, and when the front end cap 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 ring structure in the cross-section of the distal end of the locking member 11 and the guide structure 703, which facilitates the switching of the interlocking structure of the locking member 11 in conjunction with the rotation of the front end cap 7. The structure is stable. Since the distal end of the locking member 11 and the guide structure 703 can form a ring in the cross-section, a more uniform power transmission can be obtained.

[0058] See Figures 8 to 10The front cap 7 coaxially passes through the electrode body and is secured between the lower cap 6 and the upper cap 5, axially limited, and capable of circumferential rotation. Preferably, the front cap 7 is provided with a cap spring arm 701, and the free end of the cap spring arm 701 is provided with a spring arm locking point 702. The handle body is provided with two shifting slots to lock the spring arm locking point 702. After pressing the cap spring arm 701 to release the locking of the spring arm locking point 702, the front cap 7 is rotated so that the front cap 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] In this embodiment, the cap spring arm 701 provided on the front cap 7 serves as a controlled component for locking and unlocking. When the spring arm locking point 702 on the free end of the cap spring arm 701 engages with any slot on the handle body, the front cap 7 and the locking member 11 are locked. When the cap spring arm 701 is pressed to disengage the spring arm locking point 702 from any slot on the handle body, the locked state is released, thereby enabling the shifting of the interlocking relationship.

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

[0061] In this embodiment, the transmission relationship proceeds sequentially from the front cap 7 to the locking member 11, and then the locking member 11 locks with the electrode exposure length adjustment knob or the locking member 11 locks with the electrode spacing adjustment knob 8, thereby achieving the adjustment of the locking relationship and ensuring a stable and reliable structure. During adjustment, the electrode exposure length is adjusted first. The outer insulating tube fixing member 12 is interlocked with the electrode exposure length adjustment knob through the locking member 11. When the electrode exposure length adjustment knob moves back and forth along the electrode body axis, the outer insulating tube fixing member 12 moves back and forth synchronously along the electrode body axis, and drives the outer insulating tube 4 to move back and forth along the electrode body axis. At this time, the inner insulating tube 3 and the outer insulating tube 4 move synchronously, ensuring that the electrode tip exposure lengths of the first electrode 1 and the second electrode 2 are adjusted synchronously. The exposure tip length changes, but the exposure tip lengths of the front and rear electrodes remain the same. Next, the electrode spacing is adjusted. The outer insulating tube fixing component 12 and the electrode spacing adjustment knob 8 are interlocked and fixed by the locking component 11. When the electrode spacing adjustment knob 8 moves back and forth along the axial direction of the electrode body, the outer insulating tube fixing component 12 moves back and forth synchronously along the axial direction of the electrode body, and drives the outer insulating tube 4 to move back and forth along the axial direction of the electrode body. At this time, the second electrode 2 and the outer insulating tube 4 move synchronously, and there is no relative displacement between the second electrode 2 and the outer insulating tube 4. This ensures that only the spacing between the second electrode 2 and the first electrode 1 is adjusted, without changing the exposed tip length of the second electrode 2. The exposed tip lengths of the second electrode 2 and the first electrode 1 remain unchanged and are always the same. See also Figure 20 The diagram shows the states after two electrode adjustments.

[0062] See Figures 12 to 16 Preferably, the electrode exposure length adjustment push button has length adjustment push button spring arms 902 on both sides, and the free end of the length adjustment push button spring arms 902 has a length adjustment push button locking point 903. In the free state, the length adjustment push button locking point 903 engages with the corresponding locking point on the handle body to fix it. During adjustment, pressing the length adjustment push button spring arms 902 on both sides will release the length adjustment push button locking point 903 to adjust the axial position. The electrode spacing adjustment push button 8 has spacing adjustment push button spring arms 802 on both sides, and the free end of the spacing adjustment push button spring arms 802 has a spacing adjustment push button locking point 803. In the free state, the spacing adjustment push button locking point 803 engages with the corresponding locking point on the handle body to fix it. During adjustment, pressing the spacing adjustment push button spring arms 802 on both sides will release the spacing adjustment push button locking point 803 to adjust the axial position.

[0063] In this embodiment, the length adjustment push button spring arms 902 are provided on both sides of the electrode exposure length adjustment push button, and the spacing adjustment push button spring arms 802 are provided on both sides of the electrode spacing adjustment push button 8. Corresponding length adjustment push button locking points 903 and spacing adjustment push button locking points 803 are also provided. These, together with the corresponding locking points provided on the handle body, fix the electrode exposure length adjustment push button or the electrode spacing adjustment push button 8 when no adjustment is made. When adjusting, simply 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, making the structure more stable.

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

[0065] The technical solution of this embodiment corresponds to the electrode length detector 15 corresponding to the electrode exposure length adjustment push button and the electrode spacing detector 14 corresponding to the electrode spacing adjustment push button 8. The electrode length detector 15 and the electrode spacing adjustment push button 8 monitor the axial movement distance or axial position information of the electrode exposure length adjustment push button and the axial movement distance or axial position information of the electrode spacing adjustment push button 8 in real time and send them to the host system. The host system recommends treatment parameters based on this information. Specifically, a lookup table mode can be used. The table can be a list of suitable treatment parameters that have been screened based on treatment effects after multiple experiments. The parameters are then written into the table for recommendation.

[0066] Based on the same concept, the present invention also provides an ablation system, including the multi-interlocked bipolar ablation needle described in any one of the above.

[0067] The ablation system of this embodiment can achieve synchronous adjustment of its working end first electrode 1 and second electrode 2, and the distance between the first electrode 1 and the second electrode 2 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 electrodes and the electrode distance, and provide the optimal output parameters to help doctors complete the surgery flexibly and efficiently.

[0068] It should be noted that the adjustment method provided in this embodiment is not a treatment method in actual treatment, but a method of use in an experimental or verification process. The multi-locking adjustable bipolar ablation needle of the present invention is not only suitable for steep pulse energy, but also for radiofrequency energy, and other energy forms such as microwave.

[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 the front cap 7 to the interlocking and fixing state between the outer insulating tube fixing piece 12 and the electrode exposure length adjustment push button 9.

[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. Release the length adjustment push button spring arm 902 to lock it again.

[0072] 3. Rotate the front cap by 7 to adjust it to the interlocked and fixed state between the outer insulating tube fixing piece 12 and the electrode spacing adjustment push button 8.

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

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

[0075] Furthermore, in the description of this application, "proximal" and "distal" are commonly used terms in the medical field. Specifically, "proximal" refers to the end closer to the operator, "proximal face" refers to the end face closer to the operator, "distal" refers to the end farther from the operator, and "distal face" refers to the end face 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 shall still fall within the protection scope of the present invention.

Claims

1. A multi-interlock 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 knob, an electrode spacing adjustment knob, and an outer insulating tube fixing component. The electrode exposure length adjustment knob, the electrode spacing adjustment knob, and the outer insulating tube fixing component are 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 knob. The proximal end of the second electrode is fixedly connected to the electrode spacing adjustment knob. The proximal end of the outer insulating tube is fixedly connected to the outer insulating tube fixing component. The handle body is also equipped with a locking component. One end of the locking component is switchably connected to the electrode exposure length adjustment push button or the electrode spacing adjustment push button, and the other end of the locking component is axially limited by the outer insulating tube fixing component. The adjustment handle also includes a front end cap partially inserted inside the handle body and connected to the locking member in a transmission manner. The proximal end of the front end cap engages with the distal end of the locking member, driving the front end cap to rotate so that the locking member rotates circumferentially, thereby achieving the 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-interlock adjustable bipolar ablation needle as described in claim 1, characterized in that, The locking member is provided with a first locking structure and a second locking structure on both sides along its length extension direction. The electrode exposure length adjustment push button is provided with a matching length adjustment interlocking structure on the side near the first locking structure. The electrode spacing adjustment push button is provided with a matching spacing adjustment interlocking structure on the side near the second locking structure. At least one of the first locking structure and the length adjustment interlocking structure has a structural unit with equal spacing and continuous repetition. At least one of the second locking structure and the spacing adjustment interlocking structure has a structural unit with equal spacing and continuous repetition.

3. The multi-interlocking adjustable bipolar ablation needle as described in claim 1, characterized in that, The locking member has two arc-shaped convex retaining rings with cross-sections perpendicular to the length extension direction at its distal end. The surface of the outer insulating tube fixing member has two parallel annular grooves. The two convex retaining rings are coupled to the two annular grooves. The cross-section of the outer insulating tube fixing member is circular. 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-interlock adjustable bipolar ablation needle as described in claim 1, characterized in that, The proximal end of the front cap is provided with a guide structure along the length direction. The guide structure cooperates with the distal end of the locking member to provide guidance for the axial movement of the locking member and drive the locking member to rotate circumferentially.

5. The multi-interlock adjustable bipolar ablation needle as described in claim 4, characterized in that, The guide structure and the distal end of the locking member form a circular structure in cross-section. When the front end cap is driven to rotate, the locking member is driven to rotate through the guide structure.

6. The multi-interlock adjustable bipolar ablation needle as described in claim 1, characterized in that, The front cap is provided with a cap spring arm, and the free end of the cap spring arm is provided with a spring arm locking point. The handle body is provided with two shifting slots to lock the spring arm locking point. After pressing the cap spring arm to release the locking of the spring arm locking point, the front cap is rotated so that the front cap drives the locking member to switch between locking with the electrode exposure length adjustment push button or locking with the electrode spacing adjustment push button.

7. The multi-interlock adjustable bipolar ablation needle as described in claim 1, characterized in that, Adjust the front end cap to interlock the locking member with the outer insulating tube. 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. Adjust the front end cap to interlock the locking member with the electrode spacing adjustment push button, and adjust the outer insulating tube and the second electrode in a synchronized manner to control the spacing between the first electrode and the second electrode.

8. The multi-interlock adjustable bipolar ablation needle as described in claim 1, characterized in that, The electrode exposure length adjustment push button is provided with length adjustment push button spring arms on both sides. The free end of the length adjustment push button spring arm is provided with a length adjustment push button locking point. In the free state, the length adjustment push button locking point is engaged with the corresponding locking point on the handle body to fix it. When adjusting, press the length adjustment push button spring arms on both sides to release the length adjustment push button locking point to adjust the axial position. The electrode spacing adjustment push button is provided with spacing adjustment push button spring arms on both sides. The free end of the spacing adjustment push button spring arms is provided with a spacing adjustment push button locking point. In the free state, the spacing adjustment push button locking point is engaged with the corresponding locking point on the handle body to fix it. When adjusting, press the spacing adjustment push button spring arms on both sides to release the spacing adjustment push button locking point to adjust the axial position.

9. The multi-interlock adjustable bipolar ablation needle as described in 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 push button. 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 is provided in the handle body, one end of which is fixedly connected to the electrode spacing adjustment push button. 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 recommends therapeutic electrical parameters based on data collected by the electrode length detector and the electrode spacing detector by looking up a table.

10. An ablation system, characterized in that, The bipolar ablation needle with multi-interlock adjustment as described in any one of claims 1 to 9.

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