Vertebral Basal Nerve Ablation Device

Abstract

The present invention discloses a vertebral basal nerve ablation device, which includes a puncture assembly, a cannula assembly, and an ablation assembly. Among them, the cannula assembly is detachably connected to the puncture assembly. The cannula assembly includes a filling tube, a filling tube fixing member, an adjustment handle, and a mating limiting member. The filling tube is fixedly connected to the filling tube fixing member, and a liner core is provided inside the filling tube. The adjustment handle includes a retraction handle and a liner core handle. The retraction handle is threadedly connected to the filling tube fixing member, and the liner core handle is fixedly connected to the liner core. The mating limiting member is rotatably connected to the adjustment handle, and the cannula assembly is detachably connected to the puncture assembly through the mating limiting member. The ablation assembly includes an ablation electrode and an electrode handle. The ablation electrode passes through the filling tube, and the electrode handle is rotatably connected to the cannula assembly. The ablation device of the present application solves the problems that the long-term conservative treatment of chronic low back pain has poor effects and recurs frequently, and the invasive treatment methods are likely to cause the patient to have back stiffness and limited mobility when treating chronic low back pain.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly, to a vertebral nerve ablation device. Background Art

[0002] Chronic low back pain is a relatively common musculoskeletal disease and one of the main causes of disability. At present, the treatment methods for chronic low back pain are mainly divided into conservative treatment and invasive treatment. Conservative treatment is prone to repeated attacks and the effect is not obvious. After invasive treatments such as total disc replacement or lumbar fusion, although the pain and function of the patient are improved correspondingly in a short time, the patient is prone to lumbar back stiffness and obvious limitation of activity. Summary of the Invention

[0003] The main object of the present invention is to provide a vertebral nerve ablation device to at least solve the problems of repeated attacks and ineffective long-term conservative treatment, and the problems that invasive treatment methods such as total disc replacement or lumbar fusion in the treatment of chronic low back pain are prone to cause lumbar back stiffness and limited activity of the patient.

[0004] According to one aspect of the present invention, a vertebral nerve ablation device is provided, including:

[0005] A puncture assembly, the puncture assembly includes a stylet member and a cannula member. When the puncture assembly works, the stylet member is inserted through the cannula member;

[0006] A cannula assembly, the cannula assembly is detachably connected to the puncture assembly. The cannula assembly includes a filling tube, a filling tube fixing member, an adjustment handle, and a fitting limiting member. The filling tube is fixedly connected to the filling tube fixing member. When the cannula assembly works, a liner core is arranged inside the filling tube; the adjustment handle includes a retraction handle and a liner core handle. The retraction handle is threadedly connected to the filling tube fixing member, and the liner core handle is fixedly connected to the liner core; the fitting limiting member is rotatably connected to the retraction handle, and the cannula assembly is detachably connected to the puncture assembly through the fitting limiting member;

[0007] An ablation assembly, the ablation assembly includes an ablation electrode and an electrode handle. The ablation electrode is fixedly connected to the electrode handle. When the ablation electrode works, the ablation electrode is inserted through the filling tube, and the electrode handle is connected to the cannula assembly.

[0008] Further, the fitting limiting member includes an axial fitting limiting member and a radial fitting limiting member. The axial fitting limiting member and the filling tube fixing member are connected by a first connecting member. The axial fitting limiting member and the first connecting member are rotatably connected, and the filling tube fixing member and the first connecting member are threadedly connected.

[0009] Further, the filling tube fixing member includes a filling handle and a guide rail. The filling handle is disposed within the guide rail and extends along the length direction of the guide rail. The filling handle has a first transmission tooth protruding from the outer surface of the guide rail, and the guide rail is threadedly connected to the first connecting member.

[0010] Further, the retraction handle includes a retraction adjusting member and a sleeve. The retraction adjusting member is fixedly connected to the sleeve. The inner wall of the sleeve is provided with a second transmission tooth, and the second transmission tooth meshes with the first transmission tooth of the filling handle, so that when the retraction handle rotates, it drives the filling handle to slide along the length direction of the guide rail within the guide rail.

[0011] Further, an end cap is provided between the radial mating limiting member and the sleeve. One end of the end cap is threadedly connected to the radial mating limiting member, and the other end is snap-connected to the sleeve.

[0012] Further, a limiting and mating member is provided between the core handle and the sleeve. One end of the limiting and mating member is fixedly connected to the guide rail, and the other end is detachably connected to the core handle. The limiting and mating member is used to define the retraction position of the filling tube.

[0013] Further, the sleeve assembly further includes a limiting and mating member. The electrode handle includes a handle body, a second connecting member, a handle screw and a handle tail sleeve. One end of the handle body is threadedly connected to the second connecting member, and the other end of the handle body is threadedly connected to the handle tail sleeve. The handle screw is rotatably connected to the handle body through the second connecting member; the handle screw can rotate relative to the handle body. When the ablation assembly works, the handle screw is detachably connected to the limiting and mating member; the handle tail sleeve is used to fix the external cable.

[0014] Further, the ablation electrode includes a working electrode and a return electrode. The handle body is provided with a handle chamber. The handle chamber is provided with a limiting ring, a pressure tube and a bridge connection wire 8. The limiting ring is used to limit the return electrode, the bridge connection wire 8 is used to connect the core of the external cable, and the pressure tube is used to press and fix the working electrode and the core of the external cable.

[0015] Further, the ablation electrode includes at least one working electrode and a return electrode corresponding to the working electrode one by one. The working electrode penetrates through the return electrode. An inner sleeve is provided on the surface of the working electrode, and an outer sleeve is provided on the surface of the return electrode; the working electrode includes a working electrode tube and an electrode head, and the electrode head is provided with a temperature sensor.

[0016] Further, the syringe component includes a syringe handle and a syringe, and the syringe handle is fixedly connected to the syringe; the stylet component includes a stylet handle and a stylet, and the stylet handle is fixedly connected to the stylet; when the puncture assembly works, the stylet handle is detachably connected to the syringe handle; a puncture part is arranged at the end of the stylet, and when the stylet penetrates through the syringe, the puncture part is located outside the syringe.

[0017] In the present invention, by designing a vertebral-basal nerve ablation device with a puncture assembly, a cannula assembly and an ablation assembly used in cooperation, the connection time of puncture, channel establishment and ablation during the ablation of the vertebral-basal nerve can be improved, and the ablation efficiency of the vertebral-basal nerve is improved. By ablating the vertebral-basal nerve, the dependence on traditional invasive treatment methods for musculoskeletal diseases can be reduced, thereby reducing the risk of back stiffness and limited mobility. The ablation electrode includes at least one working electrode and a return electrode corresponding to the working electrode one by one, and can realize multi-pole independent control. When irregular ablation is required, the accuracy of ablation can be improved through multi-pole independent control; cutting lines are arranged on the working tube of the working electrode and the return electrode of the present application, so that the ablation electrode has the function of compliant bending and can match the requirements of different surgical paths. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0019] Figure 1 is a three-dimensional structure diagram of the vertebral-basal nerve ablation device disclosed in the embodiment of the present invention;

[0020] Figure 2 is a cross-sectional view of the cannula assembly disclosed in the embodiment of the present invention;

[0021] Figure 3 is a schematic structural diagram of the electrode handle disclosed in the embodiment of the present invention;

[0022] Figure 4 is a cross-sectional view of the electrode handle disclosed in the embodiment of the present invention;

[0023] Figure 5 is a schematic structural diagram of the first ablation electrode disclosed in the embodiment of the present invention;

[0024] Figure 6 is a schematic structural diagram of the second ablation electrode disclosed in the embodiment of the present invention;

[0025] Figure 7 is a cross-sectional view of the ablation electrode disclosed in the embodiment of the present invention;

[0026] Figure 8 Structural schematic diagram of the puncture assembly disclosed in the embodiment of the present invention;

[0027] Figure 9 Schematic diagram of a cutting pattern disclosed in the embodiment of the present invention;

[0028] Figure 10 Schematic diagram of another cutting pattern disclosed in the embodiment of the present invention;

[0029] Figure 11 Structural schematic diagram of the cannula assembly in the rotational withdrawal mode disclosed in the embodiment of the present invention;

[0030] Figure 12 Cross-sectional view of the cannula assembly in the rotational withdrawal mode disclosed in the embodiment of the present invention;

[0031] Figure 13 Structural schematic diagram of the rotational withdrawal component disclosed in the embodiment of the present invention;

[0032] Figure 14 Structural schematic diagram of the cannula assembly in the straight pull withdrawal mode disclosed in the embodiment of the present invention;

[0033] Figure 15 Cross-sectional view of the electrode handle of the ablation assembly with another structure disclosed in the embodiment of the present invention;

[0034] Figure 16 Cross-sectional view of the ablation electrode of the ablation assembly with another structure disclosed in the embodiment of the present invention.

[0035] Among them, the above-mentioned drawings include the following reference numerals:

[0036] 10. Puncture assembly; 11. Syringe handle; 111. Limiting part; 12. Syringe; 13. Needle core handle; 14. Needle core; 141. Puncturing part; 20. Cannula assembly; 21. Filling tube; 211. Liner core; 22. Filling tube fixing part; 221. Filling handle; 2211. First transmission gear; 222. Guide rail; 23. Adjusting handle; 231. Retracting handle; 2311. Retracting adjusting part; 2312. Sleeve; 2313. Second transmission gear; 232. Liner core handle; 233. Limiting and cooperating part; 24. Cooperating and limiting part; 240. End cap; 241. Axial cooperating and limiting part; 242. Radial cooperating and limiting part; 25. First connecting part; 26. Rotary retracting part; 261. Rotary base; 262. Rotary nut; 263. Rotary limiting buckle; 264. Positioning part; 2641. Limiting opening; 27. First liner core handle; 28. Filling tube handle; 29. Direct-pull retracting part; 30. Ablation assembly; 31. Ablation electrode; 311. Working electrode; 3111. Working electrode tube; 3112. Electrode head; 3113. Temperature sensor; 3114. Temperature sensor cable; 312. Return electrode; 313. Inner cannula; 314. Outer cannula; 315. Internal insulating part; 32. Electrode handle; 321. Handle main body; 322. Second connecting part; 323. Handle screw; 324. Handle tail sleeve; 325. Handle chamber; 326. Limiting ring; 327. Pressure wire tube; 328. Bridge wiring; 40. External cable. Detailed implementation manners

[0037] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0038] It should be noted that the terms used herein are only for describing the specific implementation manners and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0039] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0040] See Figures 1 to 10 As shown, according to an embodiment of the present application, a vertebral basal nerve ablation device is provided, which includes a puncture assembly 10, a cannula assembly 20, and an ablation assembly 30. Among them, the puncture assembly 10 includes a stylet member and a needle tube member. When the puncture assembly 10 works, the stylet member is inserted through the needle tube member. The cannula assembly 20 is detachably connected to the puncture assembly 10. The cannula assembly 20 includes a filling tube 21, a filling tube fixing member 22, an adjustment handle 23, and a mating limiting member 24. The filling tube 21 is fixedly connected to the filling tube fixing member 22. When the cannula assembly 20 works, a liner core 211 is arranged inside the filling tube 21; the adjustment handle 23 includes a retraction handle 231 and a liner core handle 232. The retraction handle 231 is threadedly connected to the filling tube fixing member 22, and the liner core handle 232 is fixedly connected to the liner core 211; the mating limiting member 24 is rotatably connected to the retraction handle 231, and the cannula assembly 20 is detachably connected to the puncture assembly 10 through the mating limiting member 24. The ablation assembly 30 includes an ablation electrode 31 and an electrode handle 32. The ablation electrode 31 is fixedly connected to the electrode handle 32. When the ablation electrode 31 works, the ablation electrode 31 is inserted through the filling tube 21, and the electrode handle 32 is connected to the cannula assembly 20.

[0041] Understandably, during the operation using the vertebral basal nerve ablation device, first, a channel into the bone tissue is established at the pre-positioned puncture site through the puncture assembly 10. The stylet component of the puncture assembly 10 is punctured into the bone tissue, and then the stylet component is removed from the cannula component. The filling tube 21 of the cannula assembly 20 is inserted into the cannula component of the puncture assembly 10. The mating limiting member 24 of the cannula assembly 20 is connected to the cannula component. A channel to the target point is established through the filling tube 21 and the stylet 211 of the cannula assembly 20. Then, the stylet 211 and the stylet handle 232 are separated from the cannula assembly 20 through the stylet handle 232. The ablation assembly 30 is connected to the cannula assembly 20. The ablation electrode 31 of the ablation assembly 30 enters the target point position. By retracting the handle 231, the filling tube 21 of the cannula assembly 20 is retracted. After exposing the effective working part of the ablation electrode 31, the device is started for ablation treatment.

[0042] In this embodiment, by integrating the puncture assembly 10, the cannula assembly 20, and the ablation assembly 30 on the same device, the integration of nerve puncture, channel establishment, and ablation is achieved, which can simplify the process of percutaneous nerve ablation surgery and improve the surgical efficiency. The puncture assembly 10 can accurately establish a channel into the bone tissue at a predetermined position. The cannula assembly 20 further stabilizes the channel through the filling tube 21 and the stylet 211, ensuring that the ablation electrode 31 can smoothly reach the target point position, improving the accuracy and safety of the surgery. The design of the adjustment handle 23 allows the doctor to adjust the filling tube 21 to expose the effective working part of the ablation electrode 31, which can adapt to different surgical requirements. At the same time, the rotatable connection between the electrode handle 32 and the cannula assembly 20 also provides additional flexibility, enabling the ablation electrode 31 to be more accurately positioned at the target point position. Through the modular design and detachable connection method in this embodiment, the operation of the ablation device is made more convenient, and at the same time, the risk during the surgery is reduced. The components can be quickly replaced or adjusted to adapt to the changes during the surgery, ensuring the success and safety of the surgery. The design of the ablation assembly 30 ensures that the ablation electrode 31 can accurately and effectively act on the target point position, thereby improving the effect of vertebral basal ablation.

[0043] Optionally, the stylet 211 is composed of an alloy wire and a reinforcing tube. The alloy wire and the reinforcing tube are fixedly connected, and the connection methods include crimping, welding, or gluing, etc. In this embodiment, the fixed connection of the alloy wire and the reinforcing tube of the stylet 211 forms a strong internal structure, improving the strength and stability of the stylet, enabling it to withstand greater external forces and pressures.

[0044] Furthermore, the cooperation limiting member 24 includes an axial cooperation limiting member 241 and a radial cooperation limiting member 242. The axial cooperation limiting member 241 is connected to the filling tube fixing member 22 through a first connecting member 25. The axial cooperation limiting member 241 is threadedly connected to the first connecting member 25, and the filling tube fixing member 22 is rotatably connected to the first connecting member 25.

[0045] Reference Figure 2 As shown, one end of the first connecting member 25 is provided with a convex structure for clamping with the axial cooperation limiting member 241, and the other end is provided with a threaded structure for threadedly connecting with the filling tube fixing member 22. The first connecting member 25 can not only provide high connection strength, but also effectively disperse and transfer stress. The threaded connection method enhances the firmness and reliability of the connection. The threaded connection has self-locking property, which can resist external axial force and prevent loosening between the filling tube fixing member 22 and the first connecting member 25.

[0046] Furthermore, the filling tube fixing member 22 includes a filling handle 221 and a guide rail 222. The filling handle 221 is arranged in the guide rail 222 and extends along the length direction of the guide rail 222. The filling handle 221 has a first transmission tooth 2211 protruding from the outer surface of the guide rail 222. The guide rail 222 is threadedly connected to the first connecting member 25. Reference Figure 2 It can be seen that the guide rail 222 has a threaded structure, and the guide rail 222 is matched with the threaded structure of the first connecting member 25 through its own threaded structure to achieve threaded connection.

[0047] Furthermore, the retraction handle 231 includes a retraction adjustment member 2311 and a sleeve 2312. The retraction adjustment member 2311 is fixedly connected to the sleeve 2312. The inner wall of the sleeve 2312 is provided with a second transmission tooth 2313, and the second transmission tooth 2313 meshes with the first transmission tooth 2211 of the filling handle 221, so that when the retraction handle 231 rotates, it drives the filling handle 221 to slide along the length direction of the guide rail 222 in the guide rail 222. It can be seen from this that because the retraction adjustment member 2311 and the sleeve 2312 are fixed together, when the retraction adjustment member 2311 rotates, the retraction adjustment member 2311 will drive the sleeve 2312 to rotate together. Because the second transmission tooth 2313 on the inner wall of the sleeve 2312 meshes with the first transmission tooth 2211 of the filling handle 221, gear transmission can be achieved. Therefore, when the sleeve 2312 rotates, it will drive the filling handle 221 to slide in the guide rail 222. The filling tube 21 is fixed on the filling handle 221. Therefore, the filling tube 21 will also move axially along the sleeve with the filling handle 221, so as to realize the retraction of the filling tube 21.

[0048] In this embodiment, since the retraction adjusting member 2311 is fixedly connected to the sleeve 2312, and the sleeve 2312 is engaged with the first transmission gear 2211 of the filling handle 221 through the second transmission gear 2313 to achieve gear transmission, the axial movement of the filling handle 221 can be precisely controlled by rotating the retraction adjusting member 2311, so that the filling tube 21 can be retracted more efficiently. The fixed connection between the limiting member 24 and the sleeve 2312 ensures the stability and accuracy of the filling tube 21 during retraction.

[0049] Further, an end cap 240 is provided between the radial mating limiting member 242 and the sleeve 2312. One end of the end cap 240 is threadedly connected to the radial mating limiting member 242, and the other end is snap-fitted to the sleeve 2312. By providing the end cap 240 to connect the radial mating limiting member 242 and the sleeve 2312, the radial mating limiting member 242 can be fixed and the exposed part between the radial mating limiting member 242 and the sleeve 2312 can be covered, which not only improves the structural stability of the device but also improves the aesthetics of the device.

[0050] Further, a limiting and mating member 233 is provided between the core handle 232 and the sleeve 2312. One end of the limiting and mating member 233 is fixedly connected to the guide rail 222, and the other end is detachably connected to the core handle 232. The limiting and mating member 233 is used to limit the retraction position of the filling tube 21. When using the ablation assembly 30 for ablation, the filling tube 21 needs to be retracted to a specific position to expose the effective working part of the ablation assembly 30. By providing the limiting and mating member 233, the retraction position of the filling tube 21 can be accurately controlled, avoiding affecting the operation due to excessive retraction of the filling tube 21. The limiting and mating member 233 is detachably connected to the core handle 232, which facilitates the separation of the core handle 232 and the limiting and mating member 233 after the channel to the target point is established, and can more quickly connect the ablation assembly 30 and the cannula assembly 20 for subsequent ablation steps, improving the efficiency of the operation.

[0051] Further, the electrode handle 32 includes a handle body 321, a second connecting member 322, a handle screw 323 and a handle tail sleeve 324. One end of the handle body 321 is threadedly connected to the second connecting member 322, and the other end of the handle body 321 is threadedly connected to the handle tail sleeve 324. The handle screw 323 is rotatably connected to the handle body 321 through the second connecting member 322; the handle screw 323 can rotate relative to the handle body 321, and when the ablation assembly 30 is working, the handle screw 323 is detachably connected to the limiting and mating member 233; the handle tail sleeve 324 is used to fix the external cable 40.

[0052] Further, the ablation electrode 31 includes a working electrode 311 and a return electrode 312. The handle body 321 is provided with a handle chamber 325. The handle chamber 325 is provided with a limiting ring 326, a pressure tube 327, and a bridge connection wire 328. The limiting ring 326 is used to limit the return electrode 312. The bridge connection wire 328 is used to connect the core of the external cable 40. The pressure tube 327 is used to press and fix the working electrode 311 and the core of the external cable 40. By providing the limiting ring 326 in the handle chamber 325, the return electrode 312 can be effectively limited, preventing unnecessary movement or deviation during the operation, enhancing the overall structural stability of the ablation electrode 31, and ensuring the accuracy and safety of the operation. By pressing and fixing the working electrode 311 and the core of the external cable 40 with the pressure tube 327, the pressing connection between the working electrode 311 and the core of the external cable 40 can be made more firm, helping to prevent the working electrode 311 and the core from loosening or breaking due to force during the operation, thereby ensuring that the ablation electrode 31 can work continuously and stably.

[0053] Further, the ablation electrode 31 includes at least one working electrode 311 and a return electrode 312 corresponding to the working electrode 311 one by one. The working electrode 311 passes through the return electrode 312. An inner sleeve 313 is provided on the surface of the working electrode 311, and an outer sleeve 314 is provided on the surface of the return electrode 312; the working electrode 311 includes a working electrode tube 3111 and an electrode head 3112. A temperature sensor 3113 is provided on the electrode head 3112. The temperature sensor 3113 is fixedly connected to the cable, and the connection methods include welding, pressing, or bundling, etc.

[0054] Specifically, the ablation electrode 31 is configured as follows: when the ablation electrode 31 includes one working electrode 311 and one return electrode 312, the ablation electrode 31 adopts bipolar control; when the ablation electrode 31 includes multiple working electrodes 311 and the same number of return electrodes 312 as the working electrodes 311, the ablation electrode 31 adopts multi-pole independent control. Among them, bipolar control means that the ablation function is realized only by the cooperation of one working electrode 311 and the corresponding one return electrode 312; multi-pole independent control means that through the cooperation of multiple working electrodes 311 with the corresponding return electrodes 312 respectively, each working electrode 311 and the corresponding return electrode 312 are bipolar to each other, and the ablation function is realized according to each bipolar combination. When performing ablation, each bipolar can be independently controlled.

[0055] Reference Figures 5 to 7 As shown, the working electrode tube 3111 and the return electrode 312 of this embodiment adopt metal tubes with patterns, such as Figure 9 and Figure 10 As shown are two different cutting patterns. By setting corresponding cutting patterns on the working electrode tube 3111 and the return electrode 312, the ablation electrode 31 can realize the function of compliant bending. Reference Figure 7The numbers of the working electrodes 311, the loop electrodes 312, and the temperature sensors 3113 provided are two respectively. Each working electrode 311, loop electrode 312, and temperature sensor 3113 corresponds to each other. The combination of the working electrodes and the loop electrodes can realize the function of multi-pole independent control. When it is necessary to ablate a region with a complex or irregular shape (i.e., irregular ablation), precise ablation can be achieved through multi-pole independent control, improving the accuracy and effect of ablation and avoiding damage to surrounding tissues. For example, in the vertebral nerve, the number of nerves at the front edge and the rear edge of the vertebral body varies greatly. A large range of nerve bundles at the front edge of the vertebral body requires large-range ablation, and the nerve roots at the rear edge of the vertebral body require small-range ablation, which can reduce the risk of damaging the spinal canal due to an overly large range. Optionally, when the ablation electrode 31 is a bipolar ablation electrode (i.e., there is only one working electrode and one loop electrode), at this time, the effective part of the working electrode exposed outside the inner sleeve 313 is combined with the effective part of the loop electrode exposed outside the outer sleeve 314 to achieve irregular ablation.

[0056] In this embodiment, through the design of the metal tube with cutting lines, the working electrode tube 3111 and the loop electrode 312 can be bent compliantly, which can meet the requirements of different surgical paths; the compliantly bent electrodes can better fit the surgical area, reducing tissue compression or damage caused by electrode shape mismatch, helping to reduce the surgical risk and improve the safety of patients. Through multi-pole independent control, the ablation intensity and time of different regions can be adjusted according to needs during the operation, thereby optimizing the treatment effect, helping to reduce unnecessary tissue damage, and improving the success rate of the operation; multi-pole independent control can also simultaneously process multiple ablation regions, shortening the operation time and improving the operation efficiency. The ablation electrode with multi-pole independent control can achieve an irregular ablation range, enabling the doctor to accurately ablate specific regions according to the difference in nerve distribution, and reducing the risk of damaging surrounding important tissues such as the spinal canal due to an overly large or inaccurate ablation range. The accurate irregular ablation range helps to reduce adverse reactions such as postoperative pain and edema, and improve patient comfort.

[0057] An internal insulator 315 is also provided between the working diode 3111 and the temperature sensor 3113. The internal insulator 315 can act as an electrical isolation layer to achieve electrical isolation between different electrodes and ensure that there is no current short - circuit between different electrodes. Further, the syringe component includes a syringe handle 11 and a syringe 12, and the syringe handle 11 is fixedly connected to the syringe 12; the stylet component includes a stylet handle 13 and a stylet 14, and the stylet handle 13 is fixedly connected to the stylet 14; the syringe handle 11 is provided with a limiting portion 111. When the puncture assembly 10 works, the stylet handle 13 is threadedly connected to the syringe handle 11 and is located at the limiting portion 111; a puncture portion 141 is provided at the end of the stylet 14. When the stylet 14 passes through the syringe 12, the puncture portion 141 is located outside the syringe 12. The stylet handle 13 is connected to the syringe handle 11. The connection method between the stylet handle 13 and the syringe handle 11 includes but is not limited to threaded connection, snap - connection, etc. The syringe handle 11 is provided with a limiting portion 111, and the stylet handle 13 is located at the limiting portion 111 of the syringe handle 11, which can accurately control the extension length of the stylet 14 relative to the syringe 12, helping to adjust the puncture depth according to actual needs during the operation, so as to achieve accurate puncture of the target tissue. The puncture portion 141 is located outside the syringe 12, so that during the puncture process, the sharp part of the stylet 14 can first contact and penetrate the target tissue, while the syringe 12 plays a guiding and supporting role, helping to reduce the damage to the surrounding tissue during the operation and improving the safety of the operation.

[0058] Optionally, refer to Figures 11 to 13The following shows another structural form of the sleeve assembly 20 in this embodiment. The sleeve assembly 20 includes a filling tube 21, a lining core 211, a rotary retraction member 26, a first lining core handle 27, and a filling tube handle 28. Among them, the filling tube 21 is fixedly connected to the filling tube handle 28, and the rotary retraction member 26 is threadedly connected to the filling tube handle 28. The rotary retraction member 26 includes a rotary base 261, a rotary nut 262, a rotary limit buckle 263, and a positioning member 264. The positioning member 264 is detachably matched with the filling tube handle 28. The positioning member 264 is provided with a limit opening 2641, and the filling tube handle 28 is provided with a limit rib. Axial limitation is achieved through the cooperation of the limit rib and the limit opening 2641. The filling tube 21 is fixedly connected to the filling tube handle 28, while the rotary retraction member 26 is threadedly connected to the filling tube handle 28. This connection method is not only simple and reliable but also convenient for disassembly and replacement, reducing the maintenance cost and time. The functions of rotation and retraction are achieved through the joint cooperation of the rotary base 261, the rotary nut 262, the rotary limit buckle 263, and the positioning member 264, which helps to quickly and accurately retract the sleeve assembly when needed, improving the accuracy and safety of the operation. The limit opening 2641 provided on the positioning member 264 cooperates with the limit rib provided on the filling tube handle 28 to achieve the function of axial limitation, ensuring the stability of the sleeve assembly 20 during use and preventing operation errors or safety accidents caused by accidental movement.

[0059] Optionally, refer to Figure 14 The following shows yet another structural form of the sleeve assembly 20 in this embodiment. The sleeve assembly 20 includes a filling tube 21, a lining core 211, a first lining core handle 27, a filling tube handle 28, and a direct-pull retraction member 29. When it is necessary to retract the filling tube 21, the filling tube 21 can be directly retracted away from the filling tube 21 by the action of an external force through the direct-pull retraction member 29. Similarly, the function of retraction can be achieved, and the structure is relatively simple with low manufacturing cost.

[0060] Optionally, refer to Figure 15 and Figure 16 The following shows a cross-sectional view corresponding to the ablation electrode 31 and a cross-sectional view corresponding to the electrode handle 32 of another structure of the ablation assembly 30. Among them, the ablation electrode 31 includes a working electrode 311, a return electrode 312, an inner sleeve 313, and an outer sleeve 314. The working electrode 311 includes a working electrode tube 3111 and an electrode head 3112. The ablation electrode 31 is also provided with a temperature sensor 3113. The electrode handle 32 includes a pressure tube 327, a handle end sleeve 324, and a temperature sensor cable 3114. Among them, two pressure tubes 327 are provided and are respectively crimped on the working electrode 311 and the return electrode 312. The temperature sensor cable 3114 is connected to the temperature sensor 3113 of the ablation electrode 31.

[0061] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations of the spatial relative descriptions used herein will be made accordingly.

[0062] In addition, it should be noted that the use of terms such as "first" and "second" to define components is merely for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0063] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vertebral nerve ablation device, characterized in that: include: A puncture assembly (10), the puncture assembly (10) comprising a needle core component and a needle tube component, and when the puncture assembly (10) is in operation, the needle core component is inserted into the needle tube component; A cannula assembly (20), wherein the cannula assembly (20) is detachably connected to the puncture assembly (10), the cannula assembly (20) comprising a filling tube (21), a filling tube fixing member (22), an adjusting handle (23) and a matching limiting member (24), wherein the filling tube (21) is fixedly connected to the filling tube fixing member (22), and when the cannula assembly (20) is in operation, the filling tube (21) is inserted into the needle tube member, and a liner core (211) is arranged inside the filling tube (21); the adjusting handle (23) comprises a retraction handle (231) and a liner core handle (232), wherein the retraction handle (231) is threadedly connected to the filling tube fixing member (22), and the liner core handle (232) is fixedly connected to the liner core (211); the matching limiting member (24) is rotatably connected to the retraction handle (231), and the cannula assembly (20) is detachably connected to the puncture assembly (10) via the matching limiting member (24); An ablation assembly (30), the ablation assembly (30) comprising an ablation electrode (31) and an electrode handle (32), the ablation electrode (31) being fixedly connected to the electrode handle (32), and when the ablation electrode (31) is in operation, the ablation electrode (31) is inserted into the filling tube (21), and the electrode handle (32) is connected to the sleeve assembly (20).

2. The vertebral nerve ablation device according to claim 1, characterized in that: The mating stopper (24) comprises an axial mating stopper (241) and a radial mating stopper (242); the axial mating stopper (241) is connected to the filling tube fixing member (22) via a first connecting member (25); the axial mating stopper (241) and the first connecting member (25) are rotatably connected; and the filling tube fixing member (22) and the first connecting member (25) are threadedly connected.

3. The vertebral nerve ablation device according to claim 2, characterized in that: The filling tube fixing member (22) comprises a filling handle (221) and a guide rail (222); the filling handle (221) is arranged in the guide rail (222) and extends along the length direction of the guide rail (222); the filling handle (221) has a first transmission tooth (2211) protruding from the outer surface of the guide rail (222); and the guide rail (222) is threadedly connected to the first connecting member (25).

4. The vertebral nerve ablation device according to claim 3, characterized in that: The withdrawal handle (231) comprises a withdrawal adjustment member (2311) and a sleeve (2312); the withdrawal adjustment member (2311) is fixedly connected to the sleeve (2312); the inner wall of the sleeve (2312) is provided with a second transmission tooth (2313); the second transmission tooth (2313) is meshed with the first transmission tooth (2211) of the filling handle (221), so that when the withdrawal handle (231) is rotated, the filling handle (221) is driven to slide in the guide rail (222) along the length direction of the guide rail (222).

5. The vertebral nerve ablation device according to claim 4, characterized in that: An end cover (240) is provided between the radial matching stopper (242) and the sleeve (2312); one end of the end cover (240) is threadedly connected to the radial matching stopper (242), and the other end is buckled with the sleeve (2312).

6. The vertebral nerve ablation device according to claim 4, characterized in that: A limiting fitting piece (233) is provided between the liner handle (232) and the sleeve (2312); one end of the limiting fitting piece (233) is fixedly connected to the guide rail (222), and the other end is detachably connected to the liner handle (232); the limiting fitting piece (233) is used to limit the retracted position of the filling tube (21).

7. The vertebral nerve ablation device according to claim 1, characterized in that: The sleeve assembly (20) further includes a limiting fitting (233), and the electrode handle (32) includes a handle body (321), a second connecting piece (322), a handle buckle (323) and a handle tail sleeve (324), one end of the handle body (321) is threadedly connected to the second connecting piece (322), and the other end of the handle body (321) is threadedly connected to the handle tail sleeve (324), and the handle buckle (323) is rotatably connected to the handle body (321) through the second connecting piece (322); the handle buckle (323) can rotate relative to the handle body (321), and when the ablation assembly (30) is working, the handle buckle (323) and the limiting fitting (233) are detachably connected; the handle tail sleeve (324) is used to fix the external cable (40).

8. The vertebral nerve ablation device according to claim 7, characterized in that: The ablation electrode (31) comprises a working electrode (311) and a return electrode (312); the handle body (321) is provided with a handle chamber (325); the handle chamber (325) is provided with a limit ring (326), a wire crimping tube (327) and a bridge wire (328); the limit ring (326) is used to limit the return electrode (312); the bridge wire (328) is used to connect the wire core of an external cable (40); and the wire crimping tube (327) is used to crimp and fix the working electrode (311) and the wire core of the external cable (40).

9. The vertebral nerve ablation device according to claim 1, characterized in that: The ablation electrode (31) comprises at least one working electrode (311) and a return electrode (312) corresponding to the working electrode (311) in a one-to-one manner; the working electrode (311) is inserted into the return electrode (312); an inner sleeve (313) is provided on the surface of the working electrode (311); and an outer sleeve (314) is provided on the surface of the return electrode (312); the working electrode (311) comprises a working electrode tube (3111) and an electrode head (3112); and the electrode head (3112) is provided with a temperature sensor (3113).

10. The vertebral nerve ablation device according to claim 1, characterized in that: The needle tube component comprises a needle tube handle (11) and a needle tube (12), wherein the needle tube handle (11) is fixedly connected to the needle tube (12); the needle core component comprises a needle core handle (13) and a needle core (14), wherein the needle core handle (13) is fixedly connected to the needle core (14); when the puncture assembly (10) is in operation, the needle core handle (13) is detachably connected to the needle tube handle (11); a puncture portion (141) is provided at the end of the needle core (14), and when the needle core (14) is inserted into the needle tube (12), the puncture portion (141) is located outside the needle tube (12).

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