Nerve stimulation electrode and nerve stimulation device

Abstract

The utility model discloses a nerve stimulation electrode and a nerve stimulation device. The nerve stimulation electrode comprises a core body; a guide wire; an electrode structure; the fixing mechanism comprises an elastic supporting structure and a drawing structure, the elastic supporting structure is connected between the electrode structure and the far end of the core body, and the far end of the drawing structure is connected with the far end of the elastic supporting structure; the pulling structure can pull the far end of the elastic supporting structure towards the near end to be close to the near end of the elastic supporting structure so as to extrude the elastic supporting structure to expand outwards. The drawing structure can be released towards the far end, and the far end of the elastic supporting structure is far away from the near end of the elastic supporting structure through the elastic restoring force of the far end so that the elastic supporting structure can retract inwards. According to the utility model, the nerve stimulation electrode is clamped and fixed and cannot move axially, so that inaccurate nerve stimulation parts and poor nerve regulation and control effects caused by displacement of the electrode structure are avoided; and the nerve stimulation electrode can be released from clamping, so that the nerve stimulation electrode can be moved and taken out along the axial direction or the position of the nerve stimulation electrode can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and in particular to a nerve stimulation electrode and a nerve stimulation device. Background Art

[0002] Percutaneous treatment of trigeminal neuralgia, targeting the trigeminal nerve fibers or the trigeminal ganglion, is minimally invasive and does not require craniotomy. It is suitable for various types of primary and secondary trigeminal neuralgia, especially for patients with recurrence after microvascular decompression surgery, elderly and frail patients who cannot tolerate general anesthesia for craniotomy, or who are afraid of or refuse craniotomy. However, currently widely used treatments such as percutaneous radiofrequency thermocoagulation and balloon compression irreversibly damage the trigeminal nerve or the trigeminal ganglion, causing severe numbness in the head and face after surgery, which seriously affects the patient's quality of life.

[0003] Neuromodulation therapy, which involves percutaneous implantation of electrodes for electrical stimulation, has great potential for application due to its reversible and minimally invasive nature, which can better protect the physiological function of the trigeminal nerve. However, current percutaneous electrodes for neuromodulation therapy are prone to displacement, which can affect the long-term therapeutic effect of implantation. Utility Model Content

[0004] The purpose of the utility model is to provide a nerve stimulation electrode and a nerve stimulation device to solve the technical problem that the current percutaneous puncture electrode is easily displaced, thereby affecting the treatment effect after long-term implantation.

[0005] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0006] The utility model provides a neural stimulation electrode, comprising: a core body; a guide wire, which is passed through the core body; an electrode structure, which is electrically connected to the guide wire; a fixing mechanism, comprising an elastic support structure and a pulling structure, wherein the elastic support structure is connected between the electrode structure and the distal end of the core body, and the distal end of the pulling structure is connected to the distal end of the elastic support structure, and the pulling structure can be passed through the core body and fixed to the core body in an axially movable manner along the core body; wherein the pulling structure can pull the distal end of the elastic support structure toward the proximal direction, close to the proximal end of the elastic support structure, and squeeze the elastic support structure to expand outward; the pulling structure can be released toward the distal direction, and the distal end of the elastic support structure uses its own elastic restoring force to move away from the proximal end of the elastic support structure, so that the elastic support structure retracts inward.

[0007] In an embodiment of the present invention, the elastic support structure includes a plurality of support members, and the plurality of support members are arranged at intervals along the circumference of the core body, and the plurality of support members can be arranged to expand outward and retract inward.

[0008] In an embodiment of the present invention, the elastic support structure also includes an elastic sleeve, and the multiple support members are located in the elastic sleeve. The elastic sleeve is connected between the electrode structure and the distal end of the core body. The elastic sleeve can utilize its own elastic deformation to adapt to the expansion and retraction of the support structure.

[0009] In an embodiment of the present invention, the elastic sleeve is sleeved outside the multiple support members, and the multiple support members are in contact with the inner wall surface of the elastic sleeve; and / or the multiple support members are embedded in the wall of the elastic sleeve during the injection molding process of the elastic sleeve.

[0010] In an embodiment of the present invention, the support member includes a first support rod and a second support rod, the distal end of the first support rod and the proximal end of the second support rod are hinged by a hinge axis, and the first support rod and the second support rod of multiple support members can rotate around the hinge axis to achieve expansion and retraction.

[0011] In an embodiment of the present invention, the support member includes an elastic support sheet, and the elastic support sheets of the plurality of support members can achieve expansion and contraction by utilizing their own elastic deformation.

[0012] In an embodiment of the present invention, the distal ends of the plurality of support members are connected by a connecting block, and the connecting block is connected to the distal end of the pulling structure; wherein, the connecting block is fixed to the proximal end of the electrode structure; or the connecting block is slidably fitted in the electrode structure along the axial direction of the core body, and the proximal end of the electrode structure is connected to the distal end of the core body through a plurality of connecting rods, and the plurality of connecting rods are arranged at intervals along the circumference of the core body to form a plurality of channels, and the plurality of support members can expand outward through the plurality of channels.

[0013] In an embodiment of the present invention, the neural stimulation electrode further comprises at least one locking seat, a movable seat is provided at the proximal end of the pulling structure, and the locking seat can be clamped between the movable seat and the core body to limit the movement of the movable seat toward the distal direction; wherein, the locking seat comprises two clasps, one end of the two clasps is hinged, and the other end of the two clasps is detachably connected by a snap structure.

[0014] In an embodiment of the present invention, the nerve stimulation electrode also includes a guide structure, which is detachably mounted on the proximal end of the core body, and the guide structure can rotate on the core body, and a guide hole is provided on the guide structure; wherein, the guide structure is a conical sleeve, and the conical sleeve is arranged to gradually expand from the distal end to the proximal end.

[0015] The utility model also provides a nerve stimulation device, comprising: the above-mentioned nerve stimulation electrode; a pulse generator electrically connected to the nerve stimulation electrode; and a power supply module electrically connected to the pulse generator.

[0016] The features and advantages of this utility model are:

[0017] The neurostimulation electrode and neurostimulation device of the present invention are configured such that an elastic support structure is provided between the distal end of the core body and the electrode structure, and a movable pulling structure is provided in the core body to be connected to the distal end of the elastic support structure, so that the pulling structure pulls the distal end of the elastic support structure toward the proximal direction close to the proximal end of the elastic support structure, thereby squeezing the elastic support structure and causing the elastic support structure to expand outward, thereby fixing the neurostimulation electrode and preventing it from moving axially, thereby avoiding displacement of the electrode structure and causing inaccurate neurostimulation sites and poor neuroregulation effects; when the neurostimulation electrode needs to be removed or adjusted, the pulling structure is released toward the distal direction, so that the elastic support structure loses its squeezing, and the distal end of the elastic support structure uses its own elastic restoring force to move away from the proximal end of the elastic support structure, causing multiple elastic support structures to retract inward, thereby releasing the nerve stimulation electrode from being fixed, and then the neurostimulation electrode can be moved axially to be removed or its position adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the nerve stimulation electrode when it is fixed in one embodiment of the present invention.

[0020] Figure 2 This is a schematic structural diagram of an embodiment of the present invention when the nerve stimulation electrode is not fixed.

[0021] Figure 3 This is a structural diagram of a nerve stimulation electrode fixed in yet another embodiment of the present invention.

[0022] Figure 4 This is a structural diagram of a nerve stimulation electrode fixed in another embodiment of the present invention.

[0023] Figure 5 This is a structural diagram of a locking seat in one embodiment of the present utility model.

[0024] Figure 6 Schematic diagram of the cooperation between the movable seat and the locking bolt in another embodiment of the present invention.

[0025] In the picture:

[0026] 1. Core; 11. Fixed seat; 111. Locking bolt; 12. Connecting rod; 13. Channel;

[0027] 2. Electrode structure; 21. Electrode; 22. Flexible contact;

[0028] 3. Fixing mechanism; 31. Elastic supporting structure; 311. Support member; 312. First supporting rod; 313. Second supporting rod; 314. Elastic supporting sheet; 315. Elastic sleeve; 32. Pull-out structure; 321. Pull-out member; 322. Movable seat; 323. Slide groove; 324. Locking groove; 33. Connecting block; 34. Wire hole;

[0029] 4. Guide structure; 41. Conical sleeve; 42. Guide hole;

[0030] 5. Guide wire; 51. Electrical connection piece;

[0031] 6. Locking seat; 61. Snap ring; 62. Buckle structure; 621. Buckle protrusion; 622. Buckle groove. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Implementation Method 1

[0034] like Figure 1 and Figure 2 As shown, the utility model provides a neural stimulation electrode, comprising: a core body 1; a guide wire 5, which is passed through the core body 1; an electrode structure 2, which is electrically connected to the guide wire 5; a fixing mechanism 3, which comprises an elastic support structure 31 and a pulling structure 32, wherein the elastic support structure 31 is connected between the electrode structure 2 and the distal end of the core body 1, and the distal end of the pulling structure 32 is connected to the distal end of the elastic support structure 31, and the pulling structure 32 can be movably passed through the core body 1 along the axial direction of the core body 1 and can be fixed to the core body 1; wherein the pulling structure 32 can pull the distal end of the elastic support structure 31 toward the proximal direction A, close to the proximal end of the elastic support structure 31, and squeeze the elastic support structure 31 to expand outward; the pulling structure 32 can be released toward the distal direction B, and the distal end of the elastic support structure 31 uses its own elastic restoring force to move away from the proximal end of the elastic support structure 31, so that the elastic support structure 31 retracts inward.

[0035] For ease of description, this utility model defines the end of each structural component closest to the operator as the proximal end, and the end of each structural component away from the operator as the distal end. The proximal direction A is the direction closer to the operator, that is, the direction extending out of the core 1; the distal direction B is the direction away from the operator, that is, the direction extending into the core 1.

[0036] The nerve stimulation electrode of the present invention is provided with an elastic support structure 31 between the distal end of the core body 1 and the electrode structure 2 and a movable pulling structure 32 is provided in the core body 1 to be connected with the distal end of the elastic support structure 31, so that the pulling structure 32 pulls the distal end of the elastic support structure 31 toward the proximal direction to approach the proximal end of the elastic support structure 31, thereby squeezing the elastic support structure 31 and causing the elastic support structure 31 to expand outward, thereby fixing the nerve stimulation electrode and preventing it from moving axially, thereby avoiding displacement of the electrode structure 2 and causing inaccurate nerve stimulation position and poor nerve regulation effect, and the pulling structure After being pulled in the proximal direction, 32 can be fixed on the core body 1 so that the shape of the elastic support structure 31 after being expanded outward can remain stable, thereby improving the reliability of the fixing mechanism 3; when the neural stimulation electrode needs to be removed or adjusted, the pulling structure 32 is released in the distal direction, so that the elastic support structure 31 loses its squeezing, and the distal end of the elastic support structure 31 uses its own elastic restoring force to move away from the proximal end of the elastic support structure 31, so that the multiple elastic support structures 31 retract inward, thereby releasing the neural stimulation electrode from being fixed, and then the neural stimulation electrode can be moved axially to be removed or adjusted in position.

[0037] Specifically, such as Figure 1As shown, the electrode structure 2 includes a flexible contact 22 and a plurality of electrodes 21 spaced apart along the axial direction of the core body 1. The number of electrodes 21 is preferably set to four or more, and the electrodes 21 are generally formed as a metal sheet wrapped around the flexible contact 22. The electrode structure 2 is electrically connected to the pulse generator via a guidewire 5, which transmits electrical energy and signals. The electrode structure 2 stimulates the nerves according to the nerve stimulation signals generated by the pulse generator. The guidewire 5 can be made of materials such as MP35N, 35NLT, stainless steel, platinum-iridium alloy, nickel-titanium alloy, etc., but is not specifically limited. The guidewire 5 can be single-strand or multi-strand. One end of the guidewire 5 is electrically connected to the plurality of electrodes 21, and the other end of the guidewire 5 is electrically connected to the pulse generator via multiple electrical terminals 51. The core body 1 is generally formed as a pipe with a tube, and the guidewire 5 is inserted into the tube of the core body 1. The core body 1 can be made of materials such as PTFE, TTFE, PFA, PI, or nylon. The pull-out structure 32 includes a pull-out member 321. The pull-out member 321 can be a steel wire, nylon thread, or other thread structure with sufficient strength; it can also be a thin rod structure with a certain degree of flexibility. The nerve stimulation electrode of the present invention stimulates the nerves by being implanted in the body, and the pulse generator can also be implanted in the body, thereby more conveniently achieving long-term nerve stimulation treatment.

[0038] The neurostimulation electrode of the present invention includes but is not limited to being used to treat trigeminal neuralgia. Before implantation, the pulling structure 32 is released in the distal direction, that is, moved in the direction of extending into the core body 1, ensuring that the elastic support structure 31 contracts inward to the point where the neurostimulation electrode can extend into the internal channel 13 of the facial puncture needle, puncturing the dura mater sac with the facial puncture needle and introducing the neurostimulation electrode into the trigeminal ganglion sac, adjusting the position of the neurostimulation electrode to the point where the electrode structure 2 is placed in the foramen ovale, and the fixing mechanism 3 is preferably placed outside the dura mater sac, so that the facial puncture needle can be pulled out, and then the pulling structure 32 is pulled in the proximal direction, that is, moved in the direction of extending out of the core body 1, ensuring that the elastic support structure 31 expands outward to the point where the elastic support structure 31 is stuck outside the dura mater sac, thereby achieving the fixation of the neurostimulation electrode. When the neurostimulation electrode needs to be pulled out, the pulling structure 32 is released in the distal direction to ensure that the elastic support structure 31 retracts inward to the point where the neurostimulation electrode can be pulled out.

[0039] To facilitate the long-term use of the neurostimulator, the pulse generator is also implanted in the body through a subcutaneous pouch. The implantation location is preferably behind the ear, which is not easily displaced by the patient's movements. Of course, the implantation location can also be the neck, armpit, subclavian, etc.

[0040] Combine Figure 2As shown, to facilitate subcutaneous electrical connection of the guide wire 5 to the implanted pulse generator, in an embodiment of the present invention, the nerve stimulation electrode further includes a guide structure 4. The guide structure 4 is detachably mounted on the proximal end of the core body 1 and is rotatable on the core body 1. The guide structure 4 is provided with a guide hole 42. Specifically, the guide structure 4 is a tapered sleeve 41 that gradually expands from the distal end to the proximal end.

[0041] In one embodiment of the present invention, the nerve stimulation electrode is first fixed by using the fixing mechanism 3, and then the skin around the facial puncture position is expanded by using the guide structure 4, and then the lead puncture needle is punctured from the implantation position of the pulse generator to the periphery of the guide structure 4, and the guide structure 4 is rotated so that the direction of the guide hole 42 corresponds to the puncture direction of the lead puncture needle, and then the lead puncture needle is extended into the guide structure 4 from the guide hole 42, and then the lead puncture needle is used to introduce the lead sheath from the implantation position of the pulse generator, the lead puncture needle is pulled out and one end of the lead sheath is exposed to the facial skin, and then the guide structure 4 is pulled out, so that the facial puncture position only has the tail end of the guide wire 5 extending from the proximal end of the core body 1 and one end of the lead sheath, and finally the tail end of the guide wire 5 is extended along the lead sheath to the implantation position of the pulse generator and electrically connected to the pulse generator.

[0042] In another embodiment of the present invention, the guide wire 5 is firstly installed by the guide structure 4 and the electrode structure 2 is electrically connected to the pulse generator via the guide wire 5 , and then the nerve stimulation electrode is fixed by the fixing mechanism 3 .

[0043] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, the elastic support structure 31 includes a plurality of support members 311, which are arranged at intervals along the circumference of the core 1, and the plurality of support members 311 can be arranged to expand outward and retract inward. The number of support members 311 is preferably set to four or more.

[0044] Specifically, the distal ends of the plurality of support members 311 are connected via a connecting block 33, and the connecting block 33 is connected to the distal end of the pulling structure 32. Figure 1 and Figure 3 As shown, in some embodiments, the connection block 33 is fixed to the proximal end of the electrode structure 2. Figure 4 As shown, in other embodiments, the connecting block 33 is slidably fitted in the electrode structure 2 along the axial direction of the core body 1, and the proximal end of the electrode structure 2 is connected to the distal end of the core body 1 through a plurality of connecting rods 12. The plurality of connecting rods 12 are arranged at intervals along the circumference of the core body 1 and form a plurality of channels 13. The plurality of support members 311 can expand outward through the plurality of channels 13.

[0045] like Figure 1 and Figure 2As shown, in some embodiments of the present invention, the support member 311 is a supporting connecting rod, which itself does not have elasticity. The elastic support structure 31 also includes an elastic sleeve 315. Multiple support members 311 are located in the elastic sleeve 315. The elastic sleeve 315 is connected between the electrode structure 2 and the distal end of the core body 1. The elastic sleeve 315 can use its own elastic deformation to adapt to the expansion and retraction of the support structure. When the pulling structure 32 is pulled in the proximal direction, the elastic sleeve 315 is squeezed and expanded outward, and the multiple support members 311 also expand outward; when the pulling structure 32 is released in the distal direction, the elastic sleeve 315 uses its own elastic restoring force to retract inward and drive the multiple support members 311 to retract inward. In addition, by providing the elastic sleeve 315, it is possible to prevent the multiple support members 311 from causing damage to the surrounding tissue.

[0046] Specifically, the elastic sleeve 315 is made of a flexible, deformable material, such as medical silicone or medical rubber. The distal end of the elastic sleeve 315 is sealed to the proximal end of the electrode structure 2, and the proximal end of the elastic sleeve 315 is sealed to the distal end of the core 1. By controlling the hardness of the elastic sleeve 315, the elastic sleeve 315 has a certain elastic deformation ability, allowing it to expand outward under the pulling action of the pulling structure 32 and retract inward when the pulling structure 32 is released. It also has a certain rigidity, thereby providing a certain support capacity after expansion, and when not being pulled, it can overcome the resistance encountered during the delivery of the neurostimulation electrode and maintain a retracted state.

[0047] The support member 311 includes a first support rod 312 and a second support rod 313. The distal end of the first support rod 312 and the proximal end of the second support rod 313 are hingedly connected via a hinge axis. The first support rods 312 and the second support rods 313 of the multiple support members 311 can rotate about the hinge axis to achieve expansion and retraction. When the first support rod 312 and the second support rod 313 rotate about the hinge axis, causing the proximal end of the first support rod 312 and the distal end of the second support rod 313 to move away from each other, the multiple support members 311 retract; when the first support rod 312 and the second support rod 313 rotate about the hinge axis, causing the proximal end of the first support rod 312 and the distal end of the second support rod 313 to move closer to each other, the multiple support members 311 expand. The proximal ends of the multiple first support rods 312 are connected to the proximal end of the core 1, and the distal ends of the multiple second support rods 313 are connected through the connecting block 33, and the connecting block 33 is connected to the distal end of the pulling structure 32; wherein, the connecting block 33 is fixed to the proximal end of the electrode structure 2.

[0048] like Figure 3As shown, in other embodiments of the present invention, the supporting connecting rod is replaced by an elastic supporting piece 314 that cooperates with an elastic sleeve 315 to form an elastic supporting structure 31. The elastic supporting pieces 314 of the multiple supporting members 311 can achieve expansion and retraction by utilizing their own elastic deformation. When the multiple elastic supporting pieces 314 are squeezed by the pulling structure 32, the middle part of the elastic supporting piece 314 can bend and deform outward, causing the multiple elastic supporting pieces 314 to expand outward. When the squeezing is lost, the multiple elastic supporting pieces 314 retract inward under the action of the elastic restoring force. Since the elastic supporting piece 314 has a certain elastic deformation ability to achieve expansion and retraction, and has a certain rigidity to resist the reaction force of human tissue in the expanded state to form support, the fixation of the nerve stimulation electrode is achieved.

[0049] In one embodiment, the elastic support sheet 314 can be a thin plastic sheet, with both ends of the elastic support sheet 314 fixedly connected to the distal end of the sliding sleeve and the proximal end of the fixed sleeve. In another embodiment, the elastic support sheet 314 can be a thin metal sheet, embedded and fixed within the wall of the elastic sleeve 315, with both ends of the elastic support sheet 314 abutting against the distal end of the sliding sleeve and the proximal end of the fixed sleeve.

[0050] Among them, such as Figure 1 As shown, the elastic sleeve 315 can be sleeved outside the plurality of support members 311, and the plurality of support members 311 abut against the inner wall surface of the elastic sleeve 315. Figure 3 As shown, the plurality of support members 311 may also be embedded in the wall of the elastic sleeve 315 during the injection molding process of the elastic sleeve 315 .

[0051] like Figure 4 As shown, in some further embodiments of the present invention, since the support member 311 composed of the elastic support sheet 314 itself has elastic deformation capability, the elastic support structure 31 only includes a plurality of support members 311 composed of a plurality of elastic support sheets 314 without the above-mentioned elastic sleeve 315.

[0052] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the nerve stimulation electrode further includes at least one locking seat 6, and a movable seat 322 is provided at the proximal end of the pulling structure 32. The locking seat 6 can be stuck between the movable seat 322 and the core 1 to limit the movable seat 322 from moving toward the distal direction B; wherein, in combination with Figure 5As shown, the locking seat 6 includes two clasps 61, one end of which is hinged, and the other end of which is detachably connected via a snap structure 62. The two clasps 61 of the locking seat 6 are mated to form a sleeve structure that is sleeved outside the pull-out member 321 and clamped between the core 1 and the movable seat 322. The outer diameter of the locking seat 6 is larger than the inner diameter of the core 1 and cannot extend into the core 1. The outer diameter of the movable seat 322 is larger than the inner diameter of the locking seat 6 and cannot extend into the locking seat 6, thereby restricting the pull-out structure 32 from moving in the distal direction B and releasing it. In addition, the number of locking seats 6 can be set, and the lengths of the multiple locking seats 6 are different. Therefore, by using locking seats 6 of different lengths to clamp between the core 1 and the movable seat 322, the movable seat 322 can pull the pull-out member 322 out of the core 1 to different lengths, and the elastic support structure 31 can expand outward to different outer diameters. The buckle structure 62 includes a buckle protrusion 621 provided at an open end of one buckle ring 61 and a buckle groove 622 provided at an open end of the other buckle ring 61 .

[0053] like Figure 3 and Figure 4 As shown, in other embodiments of the present invention, a fixed seat 11 is provided at the proximal end of the core body 1, and a movable seat 322 is provided at the proximal end of the pulling structure 32. The movable seat 322 is slidably fitted in the fixed seat 11 along the axial direction of the core body 1, that is, the movable seat 322 can slide relative to the fixed seat 11 in the proximal direction A or the distal direction B; wherein, in combination with Figure 6 As shown, the movable seat 322 is provided with at least one locking groove 324 and at least one sliding groove 323. The sliding groove 323 extends axially along the core body 1, and the locking groove 324 extends circumferentially along the core body 1 and communicates with the sliding groove 323. The fixed seat 11 is provided with at least one locking bolt 111. The locking bolt 111 can slide along the sliding groove 323 to the entrance of one of the locking grooves 324. The fixed seat 11 can rotate along the circumference of the core body 1 and drive the locking bolt 111 to lock into the locking groove 324. By pulling the movable seat 322 in the proximal direction A, the pulling structure 32 can drive the distal end of the elastic support structure 31 in the proximal direction A, allowing the elastic support structure 31 to expand outward. After the elastic support structure 31 has expanded to the desired extent, the fixed seat 11 can be rotated toward the side near the locking groove 324, causing the locking bolt 111 to lock into the corresponding locking groove 324, thereby maintaining the desired expanded state of the elastic support structure 31. By rotating the fixed seat 11 toward the side away from the locking groove 324, the locking bolt 111 is disengaged from the locking groove 324 and enters the sliding groove 323, thereby releasing the lock of the movable seat 322. The movable seat 322 can then be slid in the distal direction B to release the pulling structure 32, allowing the elastic support structure 31 to retract inward.

[0054] Specifically, the number of locking grooves 324 is preferably multiple, and the multiple locking grooves 324 are arranged at intervals along the axial direction of the core body 1, so that the elastic support structure 31 can form a variety of expansion forms, thereby expanding to different outer diameters. Of course, the number of locking grooves 324 can also be only one. The proximal end of the movable seat 322 can be provided with a handle, and the pulling structure 32 can be pulled and released by operating the handle. In order to facilitate the insertion of the guide wire 5, a wire hole 34 for the guide wire 5 to pass through is provided on the movable seat 322 and the connecting block 33.

[0055] In some further embodiments of the present invention, the fixed seat 11 is provided with an elastic block that can extend and retract along the radial direction of the core 1. The movable seat 322 is provided with a slide groove 323 along the axial direction of the core 1, and the slide groove 323 is provided with at least one locking groove. The elastic block can slide along the slide groove 323 to a locking groove to achieve sliding and locking of the movable seat 322. Of course, the movable seat 322 can also slide and lock with the fixed seat 11 using other sliding and locking structures known in the art.

[0056] Implementation Method 2

[0057] Combine Figures 1 to 4 As shown, the present invention also provides a neurostimulation device, comprising: a neurostimulation electrode; a pulse generator electrically connected to the neurostimulation electrode; and a power supply module electrically connected to the pulse generator. The specific structure, operating principle, and beneficial effects of the neurostimulation electrode in this embodiment are the same as those in the first embodiment, and will not be repeated here.

[0058] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A nerve stimulation electrode, characterized in that: include: core; a guide wire, passing through the core body; an electrode structure electrically connected to the guide wire; A fixing mechanism, comprising an elastic support structure and a pull-out structure, wherein the elastic support structure is connected between the electrode structure and the distal end of the core body, the distal end of the pull-out structure is connected to the distal end of the elastic support structure, and the pull-out structure is movably disposed in the core body along the axial direction of the core body and can be fixed to the core body; Wherein, the pulling structure can pull the distal end of the elastic support structure toward the proximal end to approach the proximal end of the elastic support structure and squeeze the elastic support structure to expand outward; The pulling structure can be released in a distal direction; The elastic support structure includes a plurality of support members and an elastic sleeve, the elastic sleeve is connected between the electrode structure and the distal end of the core body, the plurality of support members are located in the elastic sleeve, the plurality of support members are arranged at intervals along the circumference of the core body, and the plurality of support members abut against the inner wall surface of the elastic sleeve; and / or the plurality of support members are embedded in the wall of the elastic sleeve during the injection molding process of the elastic sleeve; the plurality of support members can be arranged to expand outward and retract inward, and the elastic sleeve can be arranged to expand outward and retract inward by utilizing its own elastic deformation.

2. The nerve stimulation electrode according to claim 1, wherein The support member includes a first support rod and a second support rod, the distal end of the first support rod and the proximal end of the second support rod are hinged via a hinge axis, and the first support rod and the second support rod of the plurality of support members can rotate around the hinge axis to achieve expansion and retraction.

3. The nerve stimulation electrode according to claim 1, wherein The support member includes an elastic support piece, and the elastic support pieces of the plurality of support members can achieve expansion and contraction by utilizing their own elastic deformation.

4. The nerve stimulation electrode according to claim 1, wherein The distal ends of the plurality of support members are connected via a connecting block, and the connecting block is connected to the distal end of the pulling structure; Wherein, the connecting block is fixed to the proximal end of the electrode structure; or The connecting block is slidably fitted in the electrode structure along the axial direction of the core body. The proximal end of the electrode structure is connected to the distal end of the core body through a plurality of connecting rods. The plurality of connecting rods are arranged at intervals along the circumference of the core body to form a plurality of channels. The plurality of support members can expand outward through the plurality of channels.

5. The nerve stimulation electrode according to claim 1, wherein The nerve stimulation electrode further comprises at least one locking seat, a movable seat is provided at the proximal end of the pulling structure, and the locking seat can be clamped between the movable seat and the core body to limit the movable seat from moving toward the distal end; Wherein, the locking seat includes two clamping rings, one end of the two clamping rings is hinged, and the other end of the two clamping rings is detachably connected through a buckle structure.

6. The nerve stimulation electrode according to claim 1, wherein The nerve stimulation electrode further comprises a guide structure, which is detachably mounted on the proximal end of the core body and can rotate on the core body, and a guide hole is provided on the guide structure; Wherein, the guiding structure is a tapered sleeve, and the tapered sleeve is gradually expanded from the distal end to the proximal end.

7. A nerve stimulation device, characterized in that: include: The neural stimulation electrode according to any one of claims 1 to 6; a pulse generator electrically connected to the nerve stimulation electrode; A power supply module is electrically connected to the pulse generator.

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