A nano knife bipolar arc extinguishing ablation needle with temperature measurement function

Abstract

The present invention discloses a nano knife bipolar arc extinguishing ablation needle with a temperature measurement function, which relates to the field of medical devices, including a handle, in which an outer sleeve needle is fixedly connected; an outer sleeve needle, in which a positive needle, a negative needle, and a threading needle with gradually decreasing diameters are sequentially inserted, and the front end of the threading needle is fixedly connected with an insulating needle head, and the outer walls of the negative needle and the positive needle are both covered with an insulating coating, and both have a conductive part left at the front end; a handle cover, on which three adjustment wheels are rotatably connected, and the adjustment wheels are respectively used to control the extension and retraction of the positive needle, the negative needle, and the threading needle. The multiple adjustment wheels on the handle of the present invention control the extension and retraction of different needles, conveniently adjust the exposed length of the conductive part of the negative needle or the positive needle, and can also adjust the distance between the conductive parts of the negative needle and the positive needle, so that during the operation, the ablation range of the ablation needle can be adjusted according to the size of the tumor without replacing the entire ablation needle.

Description

Technical Field

[0001] The invention relates to the field of medical devices, in particular to a nano knife bipolar arc extinguishing ablation needle with a temperature measurement function. Background Art

[0002] High-voltage steep pulse tumor ablation is an emerging tumor ablation technology. Steep pulse ablation is a non-thermal ablation, which is different from traditional thermal ablation (radio frequency, microwave). Its biggest advantage is that it can protect blood vessels, nerves and other tissues from damage during ablation. It releases high-voltage pulses to tumor cells through parallel ablation electrodes on two parallel ablation needles, causing nanoscale irreversible electroporation of the cell membrane, destroying the intracellular balance, and thus leading to cell apoptosis. After tumor cell apoptosis, phagocytes in the body engulf the cell fragments, and the treatment area is gradually replaced by normal tissue.

[0003] Existing high-voltage steep pulse ablation needles usually include a needle body, a handle, an electrode input wire and a plug. The needle body is usually made of a conductive medical stainless steel round tube. An insulating sleeve is put on the round steel tube. The front end of the round steel tube is exposed 15-40 mm from the insulating sleeve. The exposed part serves as the discharge electrode of the ablation needle, and its head is sharp and can be used for percutaneous puncture.

[0004] During high-voltage steep pulse ablation surgery, generally two to six ablation needles are required to be punctured simultaneously depending on the size of the tumor. Two ablation needles are selected, with the ablation discharge electrode of one ablation needle as the positive electrode and the other as the negative electrode. A pulsed high voltage is input between the two electrodes, and discharge ablation is performed on the tumor tissue between the two discharge electrodes. During discharge ablation, the parallelism requirements between the ablation needles are relatively high, and the pulse energy between the two electrodes must be continuous and complete. If there are uncovered gaps, it may cause tumor cells to remain, making it difficult for doctors to perform surgery.

[0005] The puncture operation in pulsed electric field ablation surgery is also difficult, and multiple pulse electrodes must be accurately "inserted" around the tumor. Although pulsed electric field ablation is a normal temperature ablation technology, when too many pulsed electric fields are used for ablation, coagulative necrosis may occur in the tissue near the electrode needle. Therefore, it is necessary to reasonably select ablation parameters and avoid multiple ablations in the same area to prevent thermal damage.

[0006] A Chinese patent with the relevant announcement number CN113952024A discloses a bipolar tumor ablation needle for high-voltage steep pulses, including: a positive electrode needle having a puncture head, and a tail end connected to a nano-pulse width high-voltage positive electrode, the positive electrode needle is provided with an insulating layer on the outside and the front end is exposed, and the exposed front end portion forms a positive electrode; positive electrode insulating layer: coated on the outside of the positive electrode needle, and the puncture head and tail of the positive electrode needle are not coated with an insulating layer; a negative electrode needle tube: sleeved on the positive electrode insulating layer, the outer surface of the negative electrode needle tube has an insulating coating, and the endmost part of the negative electrode needle tube has a section of exposed area without insulating coating; the frontmost part of the negative electrode needle tube also has a section of exposed area without insulating coating, and the exposed area forms a negative electrode; a negative electrode insulating layer: coated on the outside of the negative electrode needle, and the frontmost and end of the negative electrode needle tube are not coated with insulating coating.

[0007] With respect to the above-mentioned related technologies, in the prior art, the high-voltage steep pulse bipolar tumor ablation needle uses an insulating layer to separate the positive electrode segment and the negative electrode segment on the needle body, so that the positive electrode segment and the negative electrode segment are respectively located at different positions of the needle body. However, the lengths of the positive electrode segment and the negative electrode segment on the needle body of the existing high-voltage steep pulse bipolar tumor ablation needle and the distance between the positive electrode segment and the negative electrode segment are fixed values. The size and shape of tumors in different patients are different. During surgery, it may be necessary to frequently replace multiple high-voltage steep pulse bipolar tumor ablation needles of different specifications. It is difficult for the existing high-voltage steep pulse bipolar tumor ablation needle to adjust the length of the positive electrode segment and the negative electrode segment of the needle body and the distance between the two during the ablation of the tumor to prevent multiple ablations of the same area in the patient's body. In summary, it is difficult for the existing high-voltage steep pulse bipolar tumor ablation needle to flexibly control the ablation range. Summary of the invention

[0008] Based on this, the purpose of the present invention is to provide a nano knife bipolar arc extinguishing ablation needle with a temperature measurement function to solve the technical problem that the existing high-voltage steep pulse bipolar tumor ablation needle is difficult to flexibly control the ablation range.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a nano knife bipolar arc extinguishing ablation needle with a temperature measurement function, comprising a handle, an outer sleeve needle fixedly connected to the handle, the outer sleeve needle passes through the handle, and a measuring component is slidably connected to the outer wall, the handle is provided with a driving component for driving the measuring component to extend and retract along the axial direction; the outer sleeve needle, a positive needle, a negative needle, and a threading needle with gradually decreasing diameters pass through the outer sleeve needle in sequence, an insulating needle head is fixedly connected to the front end of the threading needle, the outer walls of the negative needle and the positive needle are covered with an insulating coating, and both are at the front A conductive part is left at the end, the conductive part of the negative needle is slidably connected in the needle head, and the conductive part of the positive needle does not contact the conductive part of the negative needle; a handle cover, three adjusting wheels are rotatably connected to the handle cover, and a coaxial first gear is fixedly connected to one side of the adjusting wheel, and the three first gears are respectively meshed with three sets of independent gear sets, and are respectively used to control the extension and retraction of the positive needle, the negative needle, and the threading needle. While the positive needle, the negative needle, and the threading needle are extending and retracting, the measuring component slidably connected to the outer wall of the outer needle is driven by the driving component to be able to extend and retract synchronously in the same direction.

[0010] By adopting the above technical solution, multiple adjustment wheels on the handle control the extension and retraction amount of different needles, conveniently adjusting the exposed length of the conductive part of the negative needle or the positive needle, and also the distance between the conductive parts of the negative needle and the positive needle. Therefore, during the operation, there is no need to replace the entire ablation needle to achieve the ablation range of the ablation needle according to the tumor size.

[0011] The present invention is further configured such that the outer wall of the outer sleeve needle is slidably connected with a measuring bar, and a measuring bar sliding groove for the measuring bar to slide is opened on the outer wall.

[0012] By adopting the above technical solution, the measuring strip follows the positive electrode needle, the negative electrode needle and the threading needle to extend and retract synchronously in the same direction.

[0013] The present invention is further configured such that a temperature sensor is installed inside the needle.

[0014] By adopting the above technical solution, a temperature sensing device is used to detect in real time the temperature of the tumor tissue in the needle tip area outside the ablation needle electrode during the operation.

[0015] The present invention is further configured such that a second screw and a guide rod parallel to the outer needle are rotatably connected in the handle, the second screw and the guide rod are axially slidably connected with a fixed block, the fixed block is fixedly connected to the tail end of the measuring strip, and the second screw is fixedly connected with three fourth gears at intervals along the axial direction.

[0016] By adopting the above technical solution, the driving assembly is used to transmit the power to the fourth gear, so that the second screw rotates to drive the fixed block to slide, thereby controlling the extension and retraction of the measuring bar.

[0017] The present invention is further configured as follows: the inner wall of the handle cover is fixedly connected with a fixing box on both sides of each adjusting wheel, a telescopic block is slidably connected in the fixing box along a direction parallel to the diameter of the first gear, a spring is connected between the top of the telescopic block and the inner wall of the fixing box, a first screw rod parallel to the axis of the first gear is rotatably connected between the telescopic blocks, the first screw rod is slidably connected with the connecting block along the axial direction, the tail ends of the positive needle, the negative needle and the threading needle are all fixedly connected with independent connecting boxes for inserting the connecting blocks, the first screw rod is coaxially fixedly connected with the second gear and the third gear, the first gear and the second gear are always in meshing state, and after the third gear moves downward to cause the telescopic block to compress the spring in the fixing box, the fourth gear meshes with the third gear.

[0018] By adopting the above technical solution, the corresponding positive needle, negative needle and threading needle can be controlled to be extended and retracted by turning the adjusting wheel on the handle cover alone through the gear transmission mechanism. At the same time, the downward pressure during the rotation of the adjusting wheel will cause the third gear to move toward the fourth gear and engage with it, thereby synchronously causing the measuring bar to extend and retract in the same direction. At the same time, since the other third gear and the fourth gear are in a separated state, they will not affect the gear transmission mechanism corresponding to the non-rotating adjusting wheel.

[0019] The present invention is further configured such that the lengths of the positive electrode needle, the negative electrode needle and the threading needle cannot be adjusted at the same time.

[0020] By adopting the above technical solution, when two or more third gears are meshed with the fourth gear at the same time, mutual interference will easily occur, resulting in errors in the extension and contraction amount of the measuring bar.

[0021] The present invention is further configured such that the handle cover is provided with a guide groove along the sliding direction of the connecting block, and the top end of the connecting block is always slidably connected in the guide groove.

[0022] By adopting the above technical solution, the connecting block can move more stably along the axial direction of the first screw under the drive of the first screw.

[0023] The present invention is further configured such that the handle cover is provided with four recesses for holding by fingers, and the three adjustment wheels correspond to the positions of the recesses held by the index finger, the middle finger, and the ring finger, respectively.

[0024] By adopting the above technical solution, the notch design on the handle cover enables the doctor to hold the handle part of the ablation needle more stably.

[0025] The present invention is further configured such that the three connecting blocks will not interfere with each other when sliding.

[0026] By adopting the above technical solution, it is possible to avoid collision and interference between the connecting blocks when they slide, so that the fixed block can move synchronously with the connecting block in the same direction.

[0027] In summary, the present invention mainly has the following beneficial effects:

[0028] 1. The present invention controls the extension and retraction of different needles through multiple adjustment wheels on the handle, conveniently adjusting the exposed length of the conductive part of the negative electrode needle or the positive electrode needle, and also adjusting the distance between the conductive parts of the negative electrode needle and the positive electrode needle. Thus, during the operation, the ablation range of the ablation needle can be adjusted according to the size of the tumor without replacing the entire ablation needle, thereby preventing multiple ablations of the same area in the patient's body, and effectively shortening the time of tumor ablation surgery;

[0029] 2. The present invention uses a transmission component in the handle to synchronously and unidirectionally adjust the length of the measuring strip slidably connected to the outer wall of the outer needle when the positive needle, the negative needle or the threading needle is extended or shortened, so that the puncture depth scale on the measuring strip corresponds to the actual puncture depth, which is convenient for doctors to determine the puncture depth during the operation and avoids the situation where the puncture depth is uncertain due to the change of the needle body length;

[0030] 3. The present invention sets a temperature sensing device in the insulating needle tip, and uses the temperature sensing device to detect the temperature of the tumor tissue in the needle tip area outside the ablation needle electrode in real time during the operation, thereby effectively avoiding the temperature measurement error caused by the internal temperature increase of the positive needle or the negative needle during discharge. At the same time, the insulating needle tip can also effectively avoid the arc spark phenomenon generated at the tip of the needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A perspective view of the present invention;

[0032] Figure 2 For the present invention Figure 1 A magnified view of middle;

[0033] Figure 3 is a side view of the present invention;

[0034] Figure 4 is a cross-sectional view of the needle body of the present invention;

[0035] Figure 5 For the present invention Figure 4 Enlarged view of middle B;

[0036] Figure 6 This is an exploded view of the cross section of the needle body of the present invention;

[0037] Figure 7 For the present invention Figure 6 Enlarged view of middle C;

[0038] Figure 8 It is a three-dimensional diagram of the internal structure of the handle of the present invention;

[0039] Fig. 9 For the present invention Figure 8 Enlarged view of middle D;

[0040] Fig.10 A three-dimensional diagram of the handle cover of the present invention;

[0041] Fig.11 For the present invention Fig.10 Enlarged view of E in the middle;

[0042] Fig.12 A three-dimensional diagram of the internal structure of the handle and the handle cover of the present invention in a connected state;

[0043] Fig.13 For the present invention Fig.12 Enlarged view of F.

[0044] In the figure: 1. handle; 2. handle cover; 3. outer sleeve needle; 301. measuring bar slide; 4. positive needle; 401. positive insulation layer; 5. negative needle; 501. negative insulation layer; 6. needle head; 7. threading needle; 8. temperature sensor; 9. measuring bar; 10. adjusting wheel; 11. first gear; 12. fixing box; 13. telescopic block; 14. first screw rod; 15. second gear; 16. third gear; 17. guide groove; 18. connecting block; 19. connecting box; 20. fixing block; 21. second screw rod; 22. guide rod; 23. fourth gear. DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0046] The following describes an embodiment of the present invention based on its overall structure.

[0047] Embodiment 1

[0048] A nano knife bipolar arc extinguishing ablation needle with temperature measurement function, such as Figure 1-13 As shown, it includes a handle 1, in which an outer needle 3 is fixedly connected, the outer needle 3 passes through the handle 1, and a measuring component is slidably connected to the outer wall. Specifically, the measuring component includes a measuring strip 9 slidably connected to the outer wall of the outer needle 3 along a direction parallel to the axis of the outer needle 3, and a driving component for driving the measuring component to extend and retract along the axial direction is arranged in the handle 1.

[0049] It also includes an outer sleeve needle 3, inside of which are successively penetrated a positive electrode needle 4, a negative electrode needle 5, and a threading needle 7 of gradually decreasing diameters, the front end of the threading needle 7 is fixedly connected with an insulating needle head 6, the outer walls of the negative electrode needle 5 and the positive electrode needle 4 are both covered with insulating coatings, and both have conductive parts left at the front ends, specifically, the outer wall of the positive electrode needle 4 is covered with a positive electrode insulating layer 401, and the outer wall of the negative electrode needle 5 is covered with a negative electrode insulating layer, the conductive part of the negative electrode needle 5 is slidably connected in the needle head 6, and the conductive part of the positive electrode needle 4 does not contact the conductive part of the negative electrode needle 5, specifically, there is no gap between the outer wall of the negative electrode needle 5 and the inner wall of the positive electrode needle 4, and there is also no gap between the front end of the negative electrode needle 5 and the needle head 6, so as to avoid leakage and the inability to control the lengths of the conductive parts of the positive electrode needle 4 and the negative electrode needle 5.

[0050] See also Figure 5 In the present embodiment, the distance from the tail end of the needle 6 to the beginning of the negative electrode insulating layer 501 is L1, the distance from the beginning of the negative electrode insulating layer 501 to the beginning of the positive electrode needle 4 is L2, and the distance from the beginning of the positive electrode needle 4 to the beginning of the outer sleeve needle 3 is L3. When adjusting the length of the positive and negative electrodes and the distance between the positive and negative electrodes of the ablation needle, the threading needle 7 is controlled to extend and retract, driving the needle 6 to slide relative to the negative electrode needle 5, thereby controlling the length of L1, that is, directly adjusting the length of the conductive part of the negative electrode needle 5, controlling the extension and retraction of the negative electrode needle 5, thereby controlling the length of L2, that is, directly adjusting the distance between the conductive part of the positive electrode needle 4 and the conductive part of the negative electrode needle 5, controlling the sliding of the positive electrode needle 4, thereby controlling the length of L3, that is, directly adjusting the length of the conductive part of the positive electrode needle 4.

[0051] Furthermore, it also includes a handle cover 2, on which three adjusting wheels 10 are rotatably connected, and a coaxial first gear 11 is fixedly connected to one side of the adjusting wheel 10, and the three first gears 11 are respectively meshed with three groups of independent gear groups, and are respectively used to control the extension and retraction of the positive needle 4, the negative needle 5, and the threading needle 7. When the positive needle 4, the negative needle 5, and the threading needle 7 are extended and retracted, the measuring component slidably connected to the outer wall of the outer sleeve needle 3 is driven by the driving component to be able to synchronously extend and retract in the same direction, and the positive needle 4, the negative needle 5, and the threading needle 7 cannot adjust their lengths at the same time. When two or more third gears 16 are meshed with the fourth gear 23 at the same time, mutual interference will easily occur, resulting in errors in the extension and retraction of the measuring bar 9.

[0052] See also Figure 4-13 The adjusting wheel 10 closest to the outer needle 3 is used to control the extension and retraction of the positive needle 4, the middle adjusting wheel 10 is used to control the extension and retraction of the negative needle 5, and the adjusting wheel 10 farthest from the outer needle 3 is used to control the extension and retraction of the threading needle 7.

[0053] See also Figure 8-13A second screw 21 and a guide rod 22 parallel to the outer needle 3 are rotatably connected in the handle 1. The second screw 21 and the guide rod 22 are axially slidably connected with a fixed block 20. Specifically, the rotation of the second screw 21 can drive the fixed block 20 to slide along the axial direction of the outer needle 3, and the guide rod 22 serves to enhance the stability of the sliding process of the fixed block 20. The fixed block 20 is fixedly connected to the tail end of the measuring bar 9. The second screw 21 is fixedly connected with three fourth gears 23 at intervals along the axial direction. The driving assembly is used to transmit power to the fourth gear 23, so that the second screw 21 rotates to drive the fixed block 20 to slide, thereby controlling the extension and retraction of the measuring bar 9.

[0054] See also Figure 1-2 , Figure 8-9 The outer wall of the outer sleeve needle 3 is slidably connected to a measuring strip 9, and a measuring strip slide groove 301 for the measuring strip 9 to slide is opened on the outer wall. The measuring strip 9 follows the positive needle 4, the negative needle 5, and the threading needle 7 to extend and retract synchronously in the same direction. For example, when the puncture depth displayed on the measuring strip 9 is five millimeters, the positive needle 4 extends one millimeter. If the measuring strip 9 is stationary, the actual puncture depth at the position with a scale of five millimeters is six millimeters. The measuring strip 9 will be synchronously extended in the same direction by one millimeter under the drive of the driving structure, so that the position with a scale of five millimeters on the measuring strip 9 corresponds to the actual puncture depth. During the operation, the depth of the needle tip insertion can be conveniently determined by observing the scale on the measuring strip 9, and there is no need to calculate the extension or shortening of each needle and then calculate the puncture depth, which is convenient for the doctor's surgical operation.

[0055] See also Figure 1-2 , Figure 8-13The inner wall of the handle cover 2 is fixedly connected with a fixed box 12 on both sides of each adjusting wheel 10, and a telescopic block 13 is slidably connected in the fixed box 12 along a direction parallel to the diameter of the first gear 11. A spring is connected between the top of the telescopic block 13 and the inner wall of the fixed box 12. Specifically, the spring is in an uncompressed state under normal conditions. A first screw 14 parallel to the axis of the first gear 11 is rotatably connected between the telescopic blocks 13. The first screw 14 is slidably connected with a connecting block 18 along the axial direction. The tail ends of the positive needle 4, the negative needle 5, and the threading needle 7 are all fixedly connected with independent connecting boxes 19 for inserting the connecting blocks 18. The first screw 14 is coaxially fixedly connected with the second gear 15 and the third gear 16, the first gear 11 and the second gear 15 always keep in meshing state, and after the third gear 16 moves downward to make the telescopic block 13 compress the spring in the fixed box 12, the fourth gear 23 meshes with the third gear 16, and the adjusting wheel 10 on the handle cover 2 can be turned to control the corresponding positive needle 4, negative needle 5, and threading needle 7 to be extended and retracted through the gear transmission mechanism alone. At the same time, the downward pressure in the process of rotating the adjusting wheel 10 will make the third gear 16 move toward the fourth gear 23 and mesh with it, thereby synchronously making the measuring bar 9 extend and retract in the same direction. At the same time, since the other third gear 16 and the fourth gear 23 are in a separated state, they will not affect the gear transmission mechanism corresponding to the adjusting wheel 10 in the non-rotating state.

[0056] See also Figure 10-11 The handle cover 2 is provided with a guide groove 17 along the sliding direction of the connecting block 18. The top end of the connecting block 18 is always slidably connected in the guide groove 17, so that the connecting block 18 can move more stably along the axial direction of the first screw 14 under the drive of the first screw 14. The three connecting blocks 18 will not interfere with each other when sliding, avoiding collision and interference between the connecting blocks 18 when sliding, so that the fixed block 20 can move synchronously with the connecting block 18 in the same direction.

[0057] Embodiment 2

[0058] A nano knife bipolar arc extinguishing ablation needle with temperature measurement function, such as Figure 1-13 As shown, on the basis of embodiment one, the difference from embodiment one is that a temperature sensor 8 is installed inside the needle 6, and the signal transmission wire of the temperature sensor 8 passes through the threading needle 7 to the handle 1, and comes out from the tail end of the handle 1 together with the wires of the positive needle 4 and the negative needle 5. Specifically, the present application does not improve the wire connection mode inside the handle 1 of the ablation needle, and will not be elaborated here. The temperature of the tumor tissue in the needle area outside the ablation needle electrode during the operation is detected in real time by a temperature sensing device, which effectively avoids the temperature measurement error caused by the increase in the internal temperature of the positive needle or the negative needle during discharge. At the same time, the insulated needle can also effectively avoid the arc spark phenomenon generated at the tip of the needle.

[0059] See also Figure 1-2 , Figure 10-13There are four finger-gripping notches on the handle cover 2, and the three adjusting wheels 10 correspond to the notches held by the index finger, middle finger and ring finger respectively. The notch design on the handle cover 2 enables the doctor to hold the handle 1 of the ablation needle more stably. At the same time, each finger on the palm corresponds to a different adjusting wheel 10, so the length of each needle body can be adjusted more conveniently during the operation. At the same time, since each adjusting wheel 10 corresponds to different fingers, it is less likely to cause misoperation when adjusting the length of the needle body.

[0060] The working principle of the present invention is: when it is necessary to adjust the length of the conductive part of the positive or negative electrode head or the distance between the positive and negative electrodes, press and rotate the corresponding adjusting wheel 10, so that the telescopic block 13 compresses the spring in the fixed box 12, and at the same time, the third gear 16 moves toward the fourth gear 23 and engages with it. At this time, the adjusting wheel 10 is rotated, and the first gear 11 directly transmits to the corresponding second gear 15, thereby driving the connecting block 18 on the first screw rod 14 to slide and adjust the position. When the connecting block 18 slides, it drives the connecting box 19 to slide. At the same time, the third gear 16 also transmits to the fourth gear 23, thereby driving the fixed block 20 on the second screw rod 21 and the connecting box 19 to slide synchronously in the same direction. When the adjustment purpose is achieved, the displayed puncture depth on the measuring bar 9 is kept consistent with the actual puncture depth, which is convenient for doctors to judge the depth of the needle body penetrating the skin.

[0061] Although an embodiment of the present invention has been shown and described, this specific embodiment is only an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A nano knife bipolar arc extinguishing ablation needle with temperature measurement function, characterized in that: include A handle (1), the handle (1) being fixedly connected to an outer sleeve needle (3), the outer sleeve needle (3) protruding from the handle (1) and having a measuring strip (9) slidably connected to the outer wall; An outer sleeve needle (3), wherein a positive electrode needle (4), a negative electrode needle (5), and a threading needle (7) of gradually decreasing diameters are sequentially inserted from the inside of the outer sleeve needle (3), an insulating needle head (6) being fixedly connected to the front end of the threading needle (7), the outer walls of the negative electrode needle (5) and the positive electrode needle (4) are both covered with an insulating coating, and both have conductive parts at the front end, the conductive part of the negative electrode needle (5) is slidably connected to the needle head (6), and the conductive part of the positive electrode needle (4) does not contact the conductive part of the negative electrode needle (5); A handle cover (2), wherein the handle cover (2) is rotatably connected to three adjusting wheels (10) which are parallel to the axis of the outer needle (3) and arranged along the axis of the outer needle (3), and one side of each adjusting wheel (10) is fixedly connected to a first gear (11) coaxial therewith, and a first screw rod (14) parallel to the outer needle (3), a second screw rod (21) and a guide rod (22) are rotatably connected inside the handle (1), and a fixed block (20) is axially slidably connected to the second screw rod (21) and the guide rod (22), and the fixed block (20) is fixedly connected to the tail end of the measuring strip (9), and three fourth gears (23) are arranged at intervals along the axial direction of the second screw rod (21), and a fixed box (12) is fixedly connected to the inner wall of the handle cover (2) at the rear side of each adjusting wheel (10), and the fixed box (12) is slidably connected to a first gear (11) in a direction parallel to the diameter of the first gear (11). A telescopic block (13) is provided, a spring being connected between the top end of the telescopic block (13) and the inner wall of the corresponding fixed box (12), the three telescopic blocks (13) being rotatably connected to a first screw rod (14), the first screw rod (14) being connected to three connecting blocks (18) along the axial direction, the tail ends of the positive electrode needle (4), the negative electrode needle (5) and the threading needle (7) being fixedly connected to mutually independent connecting boxes (19) for inserting the corresponding connecting blocks (18), the first screw rod (14) being connected to three second gears (15) and three third gears (16), each of the first gears (11) and the corresponding second gear (15) being always in meshing state, and after the corresponding adjusting wheel (10) is driven to make the third gear (16) move downward so that the telescopic block (13) compresses the spring between the fixed box (12), the fourth gear (23) is meshed with the third gear (16).

2. The nano knife bipolar arc extinguishing ablation needle with temperature measurement function according to claim 1 is characterized in that: The outer wall of the outer sleeve needle (3) is provided with a measuring strip sliding groove (301) for the measuring strip (9) to slide.

3. The nano knife bipolar arc extinguishing ablation needle with temperature measurement function according to claim 1 is characterized in that: A temperature sensor (8) is installed inside the needle (6).

4. The nano knife bipolar arc extinguishing ablation needle with temperature measurement function according to claim 1, characterized in that: The lengths of the positive electrode needle (4), the negative electrode needle (5), and the threading needle (7) cannot be adjusted simultaneously.

5. The nano knife bipolar arc extinguishing ablation needle with temperature measurement function according to claim 1, characterized in that: The handle cover (2) is provided with a guide groove (17) along the sliding direction of the connection block (18), and the top end of the connection block (18) is always slidably connected in the guide groove (17).

6. The nano knife bipolar arc extinguishing ablation needle with temperature measurement function according to claim 1, characterized in that: The handle cover (2) is provided with four recesses for holding with fingers, and the three adjustment wheels (10) correspond to the positions of the recesses for holding with the index finger, the middle finger, and the ring finger, respectively.

7. The nano knife bipolar arc extinguishing ablation needle with temperature measurement function according to claim 1, characterized in that: The three connecting blocks (18) will not interfere with each other when sliding.

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