Basivertebral nerve ablation apparatus

Abstract

Provided is a basivertebral nerve ablation apparatus, which comprises a cannula assembly (20) and an ablation assembly (30). The cannula assembly (20) comprises a filling tube (21) and a retraction component, a lining core (211) is provided inside the filling tube (21), and the retraction component is connected to the filling tube (21) so as to at least be used for driving the filling tube (21) to move relative to the lining core (211) in the length direction of the filling tube (21). The ablation assembly (30) comprises an ablation electrode (31) and an electrode handle (32), and the ablation electrode (31) is fixedly connected to the electrode handle (32). When the ablation electrode (31) is operated, the ablation electrode (31) is sleeved inside the filling tube (21). The ablation apparatus solves the problems of poor outcomes of long-term conservative treatment of chronic low back pain and its susceptibility to recurrence, as well as the tendency to cause lumbar stiffness and limited mobility in patients when chronic low back pain is treated with invasive procedures and other methods.

Description

Vertebral nerve ablation device

[0001] This application claims priority to Chinese Patent Application No. 2024115808838, filed on November 7, 2024, entitled "Vertebral nerve ablation device", the entire contents of which are incorporated herein by reference.

[0002] Technical Field

[0003] This application relates to the field of medical device technology, and in particular to a vertebrobasilar ablation device. Background Technology

[0004] Chronic low back pain is a common musculoskeletal disorder and a major cause of disability. Currently, treatment for chronic low back pain is mainly divided into conservative and invasive methods. Conservative treatment is prone to recurrence and has limited effectiveness. While invasive treatments such as total disc replacement or lumbar fusion may provide temporary relief in terms of pain and function, they often result in stiffness in the lower back and significant limitation of movement. Technical issues

[0005] This application provides a spinal nerve ablation device to at least address the problems of recurrent and ineffective long-term conservative treatment, as well as the tendency for invasive treatments such as total disc replacement or lumbar fusion to cause stiffness and limited mobility in patients with chronic low back pain.

[0006] According to one aspect of this application, a vertebrobasilar nerve ablation device is provided, comprising:

[0007] A sleeve assembly, the sleeve assembly including a filling tube and a retraction component, wherein a liner is disposed inside the filling tube, and the retraction component is connected to the filling tube to at least drive the filling tube to move relative to the liner along the length direction of the filling tube;

[0008] An ablation assembly, comprising an ablation electrode and an electrode handle, wherein the ablation electrode is fixedly connected to the electrode handle, and when the ablation electrode is in operation, the ablation electrode passes through the filling tube.

[0009] Furthermore, the retraction component is configured as one of a first rotary retraction structure, a straight-pull retraction structure, and a second rotary retraction structure, wherein:

[0010] When the retraction component is configured as the first rotary retraction structure or the straight pull retraction structure, the sleeve assembly further includes a first liner handle and a filling tube handle. The liner is inserted through the filling tube and fixedly connected to the first liner handle, and the filling tube is fixedly connected to the filling tube handle.

[0011] When the retraction component is configured as the second rotary retraction structure, the sleeve assembly further includes a filling tube fixing member and an adjusting handle. The filling tube is fixedly connected to the filling tube fixing member, and the adjusting handle includes a retraction handle and a liner handle. The retraction handle is threadedly connected to the filling tube fixing member, and the liner handle is fixedly connected to the liner.

[0012] Furthermore, when the retraction component is configured as the first rotary retraction structure, the first rotary retraction structure is threadedly connected to the filling tube handle, and the first rotary retraction structure is configured to rotate under the action of an external force to drive the filling tube handle to rotate and drive the filling tube to move relative to the liner.

[0013] Furthermore, the first rotary retraction structure includes a rotary base, a rotary nut, a rotary limit buckle, and a positioning element. The rotary base is fixedly connected to the rotary limit buckle. The rotary nut is disposed between the rotary base and the rotary limit buckle and can rotate relative to the rotary base. The positioning element is disposed inside the rotary nut and is detachably connected to the filling tube handle.

[0014] Furthermore, the positioning member is provided with a limiting opening, and the filling tube handle is provided with a limiting rib, the limiting rib being at least partially disposed within the limiting opening.

[0015] Furthermore, when the retraction component is configured as the straight pull retraction structure, the straight pull retraction structure is sleeved on the filling tube handle, and the straight pull retraction structure is configured to move along the length direction of the filling tube under the action of external force, so as to control the filling tube handle to drive the filling tube to move relative to the liner.

[0016] Furthermore, when the retraction component is configured as the second rotary retraction structure, the sleeve assembly further includes a mating limiting member, which is rotatably connected to the retraction handle. The mating limiting member includes an axial mating limiting member and a radial mating limiting member. The axial mating limiting member is connected to the filling tube fixing member through a first connecting member. The axial mating limiting member is rotatably connected to the first connecting member, and the filling tube fixing member is threadedly connected to the first connecting member.

[0017] Furthermore, the filling tube fixing component includes a filling handle and a guide rail. The filling handle is disposed inside 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. The guide rail is threadedly connected to the first connecting member.

[0018] Furthermore, the retraction handle includes a retraction adjustment component and a sleeve. The retraction adjustment component is fixedly connected to the sleeve. The inner wall of the sleeve is provided with a second transmission tooth. The second transmission tooth meshes with the first transmission tooth of the filling handle, so that when the retraction handle is rotated, it drives the filling handle to slide along the length direction of the guide rail within the guide rail.

[0019] Furthermore, an end cap is provided between the radially mating limiting member and the sleeve, one end of the end cap being threadedly connected to the radially mating limiting member, and the other end being fastened to the sleeve.

[0020] Furthermore, a limiting fitting is provided between the liner handle and the sleeve. One end of the limiting fitting is fixedly connected to the guide rail, and the other end is detachably connected to the liner handle. The limiting fitting is used to limit the retraction position of the filling tube.

[0021] Furthermore, when the retraction component is configured as the second rotary retraction structure, the sleeve assembly further includes a limiting fitting component, and the electrode handle includes a handle body, a second connector, a handle buckle, and a handle tail sleeve. One end of the handle body is threadedly connected to the second connector, and the other end of the handle body is threadedly connected to the handle tail sleeve. The handle buckle is rotatably connected to the handle body through the second connector. The handle buckle can rotate relative to the handle body. When the ablation component is working, the handle buckle is detachably connected to the limiting fitting component. The handle tail sleeve is used to fix external cables.

[0022] Furthermore, the device also includes a puncture assembly, which is detachably connected to the cannula assembly. The puncture assembly includes a needle handle and a needle tube, with the needle handle fixedly connected to the needle tube and the filling tube at least partially passing through the needle tube.

[0023] In this application, a vertebral nerve ablation device with a cannula assembly and an ablation assembly is designed to improve the connection time between channel establishment and ablation during vertebral nerve ablation, thereby increasing the ablation efficiency. Ablation of the vertebral nerve reduces reliance on traditional invasive treatments for musculoskeletal diseases, thus lowering the risk of lower back stiffness and limited mobility. The ablation electrode includes at least one working electrode and a corresponding circuit electrode, enabling independent multi-electrode control. This multi-electrode independent control improves ablation accuracy when performing irregular ablation procedures. The working electrode and circuit electrode of this application are provided with cutting grooves, giving the ablation electrode a flexible bending function to accommodate different surgical paths.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 is a three-dimensional structural diagram of the vertebral nerve ablation device disclosed in an embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of the sleeve assembly when the retraction component is configured as a second rotary retraction structure according to an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of the structure of the electrode handle disclosed in an embodiment of the present invention;

[0030] Figure 4 is a cross-sectional view of the electrode handle disclosed in an embodiment of the present invention;

[0031] Figure 5 is a schematic diagram of the structure of the first ablation electrode disclosed in an embodiment of the present invention;

[0032] Figure 6 is a schematic diagram of the structure of the second ablation electrode disclosed in an embodiment of the present invention;

[0033] Figure 7 is a cross-sectional view of the ablation electrode disclosed in an embodiment of the present invention;

[0034] Figure 8 is a schematic diagram of the puncture assembly disclosed in an embodiment of the present invention;

[0035] Figure 9 is a schematic diagram of a cutting pattern disclosed in an embodiment of the present invention;

[0036] Figure 10 is a schematic diagram of another cutting pattern disclosed in an embodiment of the present invention;

[0037] Figure 11 is a schematic diagram of the sleeve assembly when the retraction component is configured as a first rotary retraction structure according to an embodiment of the present invention.

[0038] Figure 12 is a cross-sectional view of the sleeve assembly when the retraction component is configured as a second rotary retraction structure according to an embodiment of the present invention;

[0039] Figure 13 is a schematic diagram of the second rotational retraction structure disclosed in an embodiment of the present invention;

[0040] Figure 14 is a schematic diagram of the sleeve assembly when the retraction component is configured as a straight pull retraction structure according to an embodiment of the present invention.

[0041] Figure 15 is a cross-sectional view of the electrode handle of an ablation assembly with another structure disclosed in an embodiment of the present invention;

[0042] Figure 16 is a cross-sectional view of the ablation electrode of another structure of the ablation assembly disclosed in an embodiment of the present invention;

[0043] Figure 17 is a schematic diagram of the structure of the filling tube handle disclosed in an embodiment of the present invention.

[0044] Explanation of key component symbols:

[0045] 10. Puncture assembly; 11. Needle handle; 111. Limiting part; 12. Needle; 13. Needle core handle; 14. Needle core; 141. Puncture part; 20. Cannula assembly; 21. Filling tube; 211. Liner; 22. Filling tube fixing part; 221. Filling handle; 2211. First transmission gear; 222. Guide rail; 23. Adjusting handle; 231. Retraction handle; 2311. Retraction adjusting part; 2312. Sleeve; 2313. Second transmission gear; 232. Liner handle; 233. Limiting fitting part; 24. Fitting limiting part; 240. End cap; 241. Axial fitting limiting part; 242. Radial fitting limiting part; 25. First connecting part; 26. First rotational retraction structure; 261. Rotating base; 262. Rotating screw 263. Rotary limiting buckle; 264. Positioning component; 2641. Limiting opening; 27. First lining core handle; 28. Filling tube handle; 281. Limiting rib; 29. ​​Straight pull-back structure; 30. Ablation assembly; 31. Ablation electrode; 3111. Working electrode; 3111. Working electrode tube; 3112. Electrode head; 3113. Temperature sensor; 3114. Temperature sensor cable; 312. Return electrode; 313. Inner sleeve; 314. Outer sleeve; 315. Internal insulation component; 32. Electrode handle; 321. Handle body; 322. Second connector; 323. Handle buckle; 324. Handle tail sleeve; 325. Handle chamber; 326. Limiting ring; 327. Crimping tube; 328. Bridging wire; 40. External cable. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] Please refer to Figures 1 to 17. An embodiment of this application provides a vertebral nerve ablation device, including a cannula assembly 20 and an ablation assembly 30. The cannula assembly 20 includes a filling tube 21 and a retraction component. A liner 211 is disposed inside the filling tube 21. The retraction component is connected to the filling tube 21 to at least drive the filling tube 21 to move relative to the liner 211 along the length direction of the filling tube 21. 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 is in operation, it passes through the filling tube 21.

[0048] Understandably, in this embodiment, the cannula assembly 20 is used to establish a working channel for the ablation assembly 30 in the skin and bones of the human body. After the working channel is established in the filling tube 21 of the cannula assembly 20, the filling tube 21 is retracted by the retraction component, exposing the liner 211 outside the filling tube 21. This allows the ablation electrode 31 of the ablation assembly 30 to ablate the vertebral nerve, ensuring the reliability of the vertebral nerve ablation. This embodiment, by designing a vertebral nerve ablation device with the cannula assembly 20 and the ablation assembly 30 working together, can improve the connection time between channel establishment and ablation during vertebral nerve ablation, thereby improving the ablation efficiency of the vertebral nerve. By ablating the vertebral nerve, the reliance on traditional invasive treatment methods for musculoskeletal diseases can be reduced, thus lowering the risk of stiffness and limited mobility in the lower back.

[0049] Furthermore, in this embodiment, the retraction component is configured as one of a first rotary retraction structure 26, a straight pull retraction structure 29, and a second rotary retraction structure.

[0050] In some embodiments, when the retraction component is configured as a first rotary retraction structure 26 or a straight pull retraction structure 29, the sleeve assembly 20 further includes a first liner handle 27 and a filling tube handle 28, the liner 211 is inserted through the filling tube 21 and fixedly connected to the first liner handle 27, and the filling tube 21 is fixedly connected to the filling tube handle 28.

[0051] Referring to Figures 11 to 14, in this embodiment, when the retraction component is set as the first rotating retraction structure 26 or the straight pull retraction structure 29, by setting the first liner handle 27 and the filling tube handle 28, when the retraction component is used to retract the filling tube 21, the filling tube handle 28 drives the filling tube 21 to move, and the first liner handle 27 controls the liner 211 to not move, which can avoid the liner 211 from injuring the human body, and the operation is more convenient and faster, improving the efficiency of channel establishment.

[0052] In some embodiments, when the retraction component is configured as a second rotary retraction structure, the sleeve assembly 20 further includes a filling tube fixing member 22 and an adjusting handle 23. The filling tube 21 is fixedly connected to the filling tube fixing member 22, and the adjusting handle 23 includes a retraction handle 231 and a liner handle 232. The retraction handle 231 is threadedly connected to the filling tube fixing member 22, and the liner handle 232 is fixedly connected to the liner 211.

[0053] Referring to Figure 2, in this embodiment, the filling tube 21 is retracted by adjusting the retraction handle 231 of the adjustment handle 23, while the liner handle 232 controls the liner 211 to remain stationary with the filling tube 21, preventing injury to the patient from movement of the liner 211. Furthermore, the retraction handle 231 of the adjustment handle 23 is fixedly connected to the filling tube fixing member 22, allowing for precise adjustment of the movement of the filling tube 21 and preventing excessive or insufficient movement that would be difficult to control. The design of the adjustment handle 23 allows for adjustment of the filling tube 21 to expose the effective working area of ​​the ablation electrode 31, adapting to different surgical needs.

[0054] In some embodiments, when the retraction component in this embodiment is configured as a first rotary retraction structure 26, the first rotary retraction structure 26 is threadedly connected to the filling tube handle 28. The first rotary retraction structure 26 is configured to rotate under the action of an external force to drive the filling tube handle 28 to rotate and drive the filling tube 21 to move relative to the liner 211. Thus, when the first rotary retraction structure 26 is subjected to an external force, since the connection between the first rotary retraction structure 26 and the filling tube handle 28 is a threaded connection, the filling tube handle 28 will rotate under the action of the first rotary retraction structure 26 and move in a direction away from or towards the first rotary retraction structure 26. This allows for precise adjustment of the length of the effective working area, ensuring the reliability of vertebrobasilar nerve ablation.

[0055] Specifically, the first rotational retraction structure 26 in this embodiment includes a rotating base 261, a rotating nut 262, a rotating limit buckle 263, and a positioning member 264. The rotating base 261 is fixedly connected to the rotating limit buckle 263. The rotating nut 262 is disposed between the rotating base 261 and the rotating limit buckle 263 and can rotate relative to the rotating base 261. The positioning member 264 is disposed inside the rotating nut 262 and is detachably connected to the filling tube handle 28.

[0056] Thus, in this embodiment, the first rotational retraction structure 26, through the coordinated action of the rotating base 261, rotating nut 262, rotating limit buckle 263, and positioning element 264, achieves the function of rotating and retracting the filling tube 21. When it is necessary to retract the filling tube 21, the rotating nut 262 rotates, causing the filling tube handle 28 to rotate, which helps to quickly and accurately retract the filling tube 21 when needed, exposing the effective working part, ensuring the reliability of ablation, and improving the accuracy and safety of operation. The positioning element 264 can ensure that the movement path of the filling tube 21 will not deviate. The rotating limit buckle 263 can limit the rotation amplitude of the rotating nut 262 from being too large, which would cause the filling tube 21 to move too much, ensuring that the exposed area of ​​the liner 211 is more reasonable and improving the reliability of ablation.

[0057] Referring to Figures 11 and 17, the positioning element 264 is provided with a limiting opening 2641, and the filling tube handle 28 is provided with a limiting rib 281, with the limiting rib 281 at least partially disposed within the limiting opening 2641. Thus, the limiting opening 2641 on the positioning element 264 cooperates with the limiting rib 281 on the filling tube handle 28 to achieve axial limiting, ensuring the stability of the sleeve assembly 20 during use and preventing operational errors or safety accidents caused by accidental movement.

[0058] Referring to Figure 14, when the retraction component is configured as a straight-pull retraction structure 29, the straight-pull retraction structure 29 is sleeved on the filling tube handle 28. The straight-pull retraction structure 29 is configured to move along the length of the filling tube 21 under the action of external force, so as to control the filling tube handle 28 to drive the filling tube 21 to move relative to the liner 211. In this way, during vertebral nerve ablation, the straight-pull retraction structure 29 can be directly pulled by human force or external force, so that the straight-pull retraction structure 29 drives the filling tube handle 28 to move, and further moves the filling tube 21. The operation is more convenient and faster, and the structure is simple, the manufacturing cost is low, and the sleeve assembly 20 is not easily damaged, ensuring the stability and reliability of the equipment.

[0059] Referring to Figures 4 and 15, in this embodiment, the electrode handle 32 is disposed at one end of the filling tube 21 of the cannula assembly 20 near the retraction component, and the ablation electrode 31 passes through the filling tube 21. At this time, by operating the electrode handle 32, the ablation electrode 31 can be operated to ablate the pyramidal nerve at the target site of the patient.

[0060] In some embodiments, the vertebral nerve ablation device of this embodiment further includes a puncture assembly 10, which is detachably connected to the cannula assembly 20. The puncture assembly 10 includes a needle handle 11 and a needle tube 12. The needle handle 11 is fixedly connected to the needle tube 12, and the filling tube 21 is at least partially inserted through the needle tube 12.

[0061] Understandably, the puncture component 10 of this embodiment is used to puncture the human body surface so that the cannula component 20 can establish a working channel. When performing surgery using this vertebral nerve ablation device, the puncture component 10 first establishes a channel to enter the bone tissue at the pre-positioned puncture location, that is, the puncture component 10 punctures into the bone tissue. Then, the puncture component 10 is separated from the puncture structure, and the filling tube 21 of the cannula component 20 is inserted into the needle tube 12 of the puncture component 10 to further establish a working channel for vertebral nerve ablation.

[0062] In this embodiment, when the retraction component is set as the second rotational retraction structure, the cooperating limiting member 24 of the cannula assembly 20 is connected to the needle handle 11. A channel to the target point is established through the filling tube 21 and the liner 211 of the cannula assembly 20. Then, the liner 211 and the liner handle 232 are separated from the cannula assembly 20 through the liner handle 232. The ablation component 30 is connected to the cannula assembly 20, and the ablation electrode 31 of the ablation component 30 enters the target point position. The filling tube 21 of the cannula assembly 20 is retracted through the retraction handle 231. After exposing the effective working part of the ablation electrode 31, the device is started to perform ablation treatment.

[0063] In some embodiments, the puncture assembly 10 of this embodiment further includes a needle core handle 13 and a needle core 14, which are fixedly connected. When the puncture assembly 10 is working, the needle core handle 13 is inserted into the needle tube 12. The needle tube handle 11 is provided with a limiting part 111. When the puncture assembly 10 is working, the needle core handle 13 is threadedly connected to the needle tube handle 11 and located in the limiting part 111. The end of the needle core 14 is provided with a puncture part 141. When the needle core 14 is inserted into the needle tube 12, the puncture part 141 is located outside the needle tube 12. The needle core handle 13 is connected to the needle tube handle 11. The connection between the needle core handle 13 and the needle tube handle 11 includes, but is not limited to, threaded connection and snap-fit ​​connection. The needle tube handle 11 is provided with a limiting part 111. The needle core handle 13 is located at the limiting part 111 of the needle tube handle 11, which can precisely control the extension length of the needle core 14 relative to the needle tube 12. This helps to adjust the puncture depth according to actual needs during the operation, thereby achieving precise puncture of the target tissue. The puncture part 141 is located outside the needle tube 12, so that during the puncture process, the sharp part of the needle core 14 can first contact and penetrate the target tissue, while the needle tube 12 plays a guiding and supporting role, which helps to reduce damage to surrounding tissues during the operation and improve the safety of the operation.

[0064] In this embodiment, by integrating the puncture component 10, cannula component 20, and ablation component 30 onto a single device, nerve puncture, channel establishment, and ablation are achieved in one unit, simplifying the percutaneous nerve ablation procedure and improving surgical efficiency. The puncture component 10 accurately establishes a channel into the bone tissue at a predetermined location. The cannula component 20 further stabilizes the channel through the filling tube 21 and the liner 211, ensuring that the ablation electrode 31 can smoothly reach the target location, improving the precision and safety of the surgery. Simultaneously, the rotatable connection between the electrode handle 32 and the cannula component 20 provides additional flexibility, allowing the ablation electrode 31 to be positioned more accurately at the target location. This embodiment, through its modular design and detachable connection, simplifies the operation of the ablation device and reduces the risks during the procedure. Components can be quickly replaced or adjusted to adapt to changes during the procedure, ensuring surgical success and safety. The design of the ablation component 30 ensures that the ablation electrode 31 can accurately and effectively act on the target location, thereby improving the effect of vertebral ablation.

[0065] Optionally, the liner 211 is composed of alloy wires and reinforcing tubes, which are fixedly connected by means such as crimping, welding, or gluing. In this embodiment, the liner 211 forms a robust internal structure through the fixed connection of alloy wires and reinforcing tubes, improving the strength and stability of the liner and enabling it to withstand greater external forces and pressures.

[0066] In some embodiments, when the retraction component of this embodiment is configured as a second rotary retraction structure, the sleeve assembly 20 further includes a mating limiting member 24. The mating limiting member 24 is rotatably connected to the retraction handle 231. The mating limiting member 24 includes an axial mating limiting member 241 and a radial mating limiting member 242. The axial mating limiting member 241 is connected to the filling tube fixing member 22 through a first connecting member 25. The axial mating limiting member 241 is threadedly connected to the first connecting member 25. The filling tube fixing member 22 is rotatably connected to the first connecting member 25.

[0067] Referring to Figure 2, one end of the first connector 25 is a protruding structure for engaging with the axially fitted limiting member 241, and the other end is a threaded structure for threaded connection with the filling tube fixing member 22. The first connector 25 not only provides high connection strength but also effectively disperses and transmits stress. The threaded connection enhances the robustness and reliability of the connection. The threaded connection is self-locking, resisting external axial forces and preventing loosening between the filling tube fixing member 22 and the first connector 25.

[0068] In some embodiments, the filling tube fixing member 22 includes a filling handle 221 and a guide rail 222. The filling handle 221 is disposed within 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. Referring to FIG2, the guide rail 222 has a threaded structure, and the guide rail 222 achieves a threaded connection by matching its own threaded structure with the threaded structure of the first connecting member 25.

[0069] In some embodiments, 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. 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 within the guide rail 222. Therefore, since the retraction adjustment component 2311 and the sleeve 2312 are fixed together, when the retraction adjustment component 2311 is rotated, the retraction adjustment component 2311 will drive the sleeve 2312 to rotate together. Since 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, it can realize gear transmission. Therefore, the rotation of the sleeve 2312 will drive the filling handle 221 to slide in the guide rail 222. The filling tube 21 is fixed on the filling handle 221, so the filling tube 21 will also move along the filling handle 221 in the axial direction of the sleeve, thereby realizing the retraction of the filling tube 21.

[0070] In this embodiment, since the retraction adjustment component 2311 is fixedly connected to the sleeve 2312, and the sleeve 2312 achieves gear transmission with the first transmission gear 2211 of the filling handle 221 through the second transmission gear 2313, the axial movement of the filling handle 221 can be precisely controlled by rotating the retraction adjustment component 2311, so that the filling tube 21 can retract more efficiently. The fixed connection between the limiting component 24 and the sleeve 2312 ensures the stability and accuracy of the filling tube 21 during the retraction process.

[0071] In some embodiments, an end cap 240 is provided between the radially mating limiting member 242 and the sleeve 2312. One end of the end cap 240 is threadedly connected to the radially mating limiting member 242, and the other end is fastened to the sleeve 2312. By providing the end cap 240 to connect the radially mating limiting member 242 and the sleeve 2312, the radially mating limiting member 242 can be fixed in place, and the exposed part between the radially 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.

[0072] In some embodiments, a limiting fitting 233 is provided between the core handle 232 and the sleeve 2312. One end of the limiting fitting 233 is fixedly connected to the guide rail 222, and the other end is detachably connected to the core handle 232. The limiting fitting 233 is used to limit the retraction position of the filling tube 21. When using the ablation component 30 for ablation, the filling tube 21 needs to be retracted to a specific position to expose the effective working part of the ablation component 30. By setting the limiting fitting 233, the retraction position of the filling tube 21 can be accurately controlled, avoiding the impact of excessive retraction of the filling tube 21 on the operation. The limiting fitting 233 is detachably connected to the core handle 232, which facilitates the separation of the core handle 232 from the limiting fitting 233 after the channel to the target point is established. This allows for faster connection of the ablation component 30 to the sleeve component 20 for subsequent ablation steps, improving the efficiency of the operation.

[0073] In some embodiments, the electrode handle 32 includes a handle body 321, a second connector 322, a handle buckle 323, and a handle tail sleeve 324. One end of the handle body 321 is threadedly connected to the second connector 322, and the other end of the handle body 321 is threadedly connected to the handle tail sleeve 324. The handle buckle 323 is rotatably connected to the handle body 321 through the second connector 322. The handle buckle 323 can rotate relative to the handle body 321. When the ablation component 30 is working, the handle buckle 323 is detachably connected to the limiting fitting 233. The handle tail sleeve 324 is used to fix the external cable 40.

[0074] In some embodiments, 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, which is provided with a limiting ring 326, a crimping tube 327, and a bridging wire 328. The limiting ring 326 is used to limit the return electrode 312, the bridging wire 328 is used to connect the core of the external cable 40, and the crimping tube 327 is used to crimp and fix the working electrode 311 and the core of the external cable 40. By providing a limiting ring 326 in the handle chamber 325, the return electrode 312 can be effectively limited, preventing unnecessary movement or displacement during the operation, enhancing the overall structural stability of the ablation electrode 31, and ensuring the accuracy and safety of the operation. By crimping the working electrode 311 and the core of the external cable 40 with the crimp tube 327, the crimping between the working electrode 311 and the core of the external cable 40 can be made more secure, which helps 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.

[0075] In some embodiments, the ablation electrode 31 includes at least one working electrode 311 and a corresponding loop electrode 312. The working electrode 311 passes through the loop 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 loop electrode 312. The working electrode 311 includes a working electrode tube 3111 and an electrode head 3112. The electrode head 3112 is provided with a temperature sensor 3113. The temperature sensor 3113 is fixedly connected to a cable, and the connection method includes welding, crimping, or bundling.

[0076] Specifically, the ablation electrode 31 is configured as follows: when the ablation electrode 31 includes one working electrode 311 and one circuit electrode 312, the ablation electrode 31 employs bipolar control; when the ablation electrode 31 includes multiple working electrodes 311 and the same number of circuit electrodes 312 as the working electrodes 311, the ablation electrode 31 employs multi-polar independent control. Here, bipolar control means that the ablation function is achieved by using only one working electrode 311 in conjunction with its corresponding circuit electrode 312; multi-polar independent control means that multiple working electrodes 311 are each in conjunction with their corresponding circuit electrodes 312, with each working electrode 311 and its corresponding circuit electrode 312 forming a bipolar relationship. The ablation function is achieved based on each combination of bipolarities, and each bipolarity can be independently controlled during ablation.

[0077] Referring to Figures 5 to 7, the working electrode 3111 and the loop electrode 312 in this embodiment are textured metal tubes. Figures 9 and 10 show two different cutting patterns. By setting corresponding cutting patterns on the working electrode 3111 and the loop electrode 312, the ablation electrode 31 can achieve compliant bending. Referring to Figure 7, the number of working electrodes 311, loop electrodes 312, and temperature sensors 3113 are each two. Each working electrode 311, loop electrode 312, and temperature sensor 3113 corresponds to a specific element. The combination of working electrodes and loop electrodes enables multi-electrode independent control. When ablation is required on areas with complex or irregular shapes (i.e., irregular shape ablation), precise ablation can be achieved through multi-electrode independent control, improving the accuracy and effectiveness of ablation and avoiding damage to surrounding tissues. For example, in the vertebral nerve, the number of nerves at the anterior and posterior edges of the vertebral body differs significantly. Large nerve bundles at the anterior edge require large-scale ablation, while nerve roots at the posterior edge require smaller-scale ablation, reducing the risk of spinal canal damage due to excessive ablation. Alternatively, when the ablation electrode 31 is a bipolar ablation electrode (i.e., only one working electrode and one circuit electrode), irregular ablation is achieved by combining the effective portion of the working electrode exposed on the outer side of the inner cannula 313 with the effective portion of the circuit electrode exposed on the outer side of the outer cannula 314.

[0078] In this embodiment, the metal tube design with cutting grooves allows the working electrode 3111 and the return electrode 312 to bend compliantly, adapting to the needs of different surgical paths. The compliantly bent electrode conforms better to the surgical area, reducing tissue compression or damage caused by electrode shape mismatch, thus helping to reduce surgical risks and improve patient safety. Through multi-polar independent control, the ablation intensity and time of different areas can be adjusted according to needs during surgery, thereby optimizing treatment effects, reducing unnecessary tissue damage, and improving surgical success rates. Multi-polar independent control also allows for simultaneous treatment of multiple ablation areas, shortening surgical time and improving surgical efficiency. The ablation electrode with multi-polar independent control can achieve irregular ablation ranges, allowing doctors to precisely ablate specific areas based on differences in nerve distribution, reducing the risk of damaging surrounding important tissues, such as the spinal canal, due to excessively large or inaccurate ablation ranges. Accurate irregular ablation ranges help reduce postoperative pain, edema, and other adverse reactions, improving patient comfort.

[0079] In some embodiments, an internal insulating element 315 is provided between the working electrode 3111 and the temperature sensor 3113. The internal insulating element 315 can be used as a power isolation layer to achieve electrical isolation between different electrodes and ensure that no current short circuit occurs between different electrodes.

[0080] Optionally, referring to Figures 15 and 16, which show cross-sectional views of the ablation electrode 31 and electrode handle 32 of another structure of the ablation assembly 30, 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 equipped with a temperature sensor 3113. The electrode handle 32 includes a crimping tube 327, a handle tail sleeve 324, and a temperature sensor cable 3114. There are two crimping tubes 327, which are respectively crimped onto 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.

[0081] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0082] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vertebrobasilar nerve ablation device, characterized in that, include: A sleeve assembly (20) includes a filling tube (21) and a retraction component. The filling tube (21) has a liner (211) inside it. The retraction component is connected to the filling tube (21) to at least drive the filling tube (21) to move relative to the liner (211) along the length direction of the filling tube (21). 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) is working, it passes through the filling tube (21).

2. The vertebrobasilar nerve ablation device according to claim 1, characterized in that, The retraction component is configured as one of a first rotary retraction structure (26), a straight pull retraction structure (29), and a second rotary retraction structure, wherein: When the retraction component is set as the first rotary retraction structure (26) or the straight pull retraction structure (29), the sleeve assembly (20) further includes a first liner handle (27) and a filling tube handle (28). The liner (211) passes through the filling tube (21) and is fixedly connected to the first liner handle (27). The filling tube (21) is fixedly connected to the filling tube handle (28). When the retraction component is configured as the second rotary retraction structure, the sleeve assembly (20) further includes a filling tube fixing member (22) and an adjusting handle (23). The filling tube (21) is fixedly connected to the filling tube fixing member (22). The adjusting handle (23) includes a retraction handle (231) and a liner handle (232). The retraction handle (231) is threadedly connected to the filling tube fixing member (22), and the liner handle (232) is fixedly connected to the liner (211).

3. The vertebrobasilar nerve ablation device according to claim 2, characterized in that, When the retraction component is configured as the first rotary retraction structure (26), the first rotary retraction structure (26) is threadedly connected to the filling tube handle (28). The first rotary retraction structure (26) is configured to rotate under the action of external force to drive the filling tube handle (28) to rotate and drive the filling tube (21) to move relative to the liner (211).

4. The vertebrobasilar nerve ablation device according to claim 3, characterized in that, The first rotation retraction structure (26) includes a rotating base (261), a rotating nut (262), a rotating limit buckle (263), and a positioning member (264). The rotating base (261) is fixedly connected to the rotating limit buckle (263). The rotating nut (262) is disposed between the rotating base (261) and the rotating limit buckle (263) and can rotate relative to the rotating base (261). The positioning member (264) is disposed inside the rotating nut (262) and is detachably connected to the filling tube handle (28).

5. The vertebrobasilar nerve ablation device according to claim 4, characterized in that, The positioning member (264) is provided with a limiting opening (2641), and the filling tube handle (28) is provided with a limiting rib (281). The limiting rib (281) is at least partially disposed within the limiting opening (2641).

6. The vertebral nerve ablation device according to claim 2, characterized in that, When the retraction component is set as the straight pull retraction structure (29), the straight pull retraction structure (29) is sleeved on the filling tube handle (28). The straight pull retraction structure (29) is configured to move along the length direction of the filling tube (21) under the action of external force, so as to control the filling tube handle (28) to drive the filling tube (21) to move relative to the liner (211).

7. The vertebrobasilar nerve ablation device according to claim 2, characterized in that, When the retraction component is configured as the second rotary retraction structure, the sleeve assembly (20) further includes a mating limiting member (24), which is rotatably connected to the retraction handle (231). The mating limiting member (24) includes an axial mating limiting member (241) and a radial mating limiting member (242). The axial mating limiting member (241) is connected to the filling tube fixing member (22) through a first connecting member (25). The axial mating limiting member (241) is rotatably connected to the first connecting member (25), and the filling tube fixing member (22) is threadedly connected to the first connecting member (25).

8. The vertebrobasilar nerve ablation device according to claim 7, characterized in that, The filling tube fixing member (22) includes a filling handle (221) and a guide rail (222). The filling handle (221) is disposed inside 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 connector (25).

9. The vertebrobasilar nerve ablation device according to claim 8, characterized in that, The retraction handle (231) includes a retraction adjustment component (2311) and a sleeve (2312). The retraction adjustment component (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) 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) within the guide rail (222).

10. The vertebrobasilar nerve ablation device according to claim 9, characterized in that, An end cap (240) is provided between the radially mating limiting member (242) and the sleeve (2312). One end of the end cap (240) is threadedly connected to the radially mating limiting member (242), and the other end is fastened to the sleeve (2312).

11. The vertebrobasilar nerve ablation device according to claim 9, characterized in that, A limiting fitting (233) is provided between the core handle (232) and the sleeve (2312). One end of the limiting fitting (233) is fixedly connected to the guide rail (222), and the other end is detachably connected to the core handle (232). The limiting fitting (233) is used to limit the retraction position of the filling tube (21).

12. The vertebrobasilar nerve ablation device according to claim 2, characterized in that, When the retraction component is configured as the second rotational retraction structure, the sleeve assembly (20) further includes a limiting fitting (233). The electrode handle (32) includes a handle body (321), a second connector (322), a handle buckle (323), and a handle tail sleeve (324). One end of the handle body (321) is threadedly connected to the second connector (322), and the other end of the handle body (321) is threadedly connected to the handle tail sleeve (324). The handle buckle (323) is rotatably connected to the handle body (321) through the second connector (322). The handle buckle (323) can rotate relative to the handle body (321). When the ablation component (30) is working, the handle buckle (323) is detachably connected to the limiting fitting (233). The handle tail sleeve (324) is used to fix the external cable (40).

13. The vertebrobasilar nerve ablation device according to claim 1, characterized in that, The device further includes a puncture assembly (10), which is detachably connected to the cannula assembly (20). The puncture assembly (10) includes a needle handle (11) and a needle tube (12). The needle handle (11) is fixedly connected to the needle tube (12), and the filling tube (21) is at least partially inserted through the needle tube (12).

14. [New Addition] A spinal nerve ablation device, characterized in that, include: A puncture assembly (10) includes a needle core component and a needle tube component. When the puncture assembly (10) is working, the needle core component is inserted into the needle tube component. A cannula assembly (20) is detachably connected to the puncture assembly (10). The cannula assembly (20) includes a filling tube (21), a filling tube fixing component (22), an adjusting handle (23), and a mating limiting component (24). The filling tube (21) is fixedly connected to the filling tube fixing component (22). When the cannula assembly (20) is working, a liner (211) is provided inside the filling tube (21). The adjusting handle (23) includes a retraction handle (231) and a liner handle (232). The retraction handle (231) is threaded to the filling tube fixing member (22), and the liner handle (232) is fixedly connected to the liner (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), and when the ablation electrode (31) is working, the ablation electrode (31) passes through the filling tube (21), and the electrode handle (32) is connected to the cannula assembly (20).

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