Implanted nerve stimulator electrode and implanted nerve stimulation system

Abstract

The present disclosure provides an implanted nerve stimulator electrode for an implanted nerve stimulation system, the implanted nerve stimulator electrode being adapted to be at least partially implanted into a human body and receiving an electrical signal from an implanted pulse generator to apply electrical stimulation to the human body. An implanted nerve stimulator electrode includes an elongate body, a plurality of wires, and at least one nerve stimulation contact structure. The nerve stimulation contact structure is in a hollow sleeve shape and is suitable for being arranged on the main body in a sleeving mode. Each nerve stimulation contact structure comprises at least two contacts, and when the nerve stimulation contact structures are arranged on the main body in a sleeving mode, each contact on the nerve stimulation contact structure is electrically connected with one corresponding wire. After the nerve stimulation contact structure provided by the invention is sleeved on the main body, an operator can weld the corresponding wire to the contact under the condition of no shielding or little shielding, so that the welding difficulty from the contact to the wire is reduced. And the production efficiency is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of medical devices, and in particular, to an implantable neurostimulator electrode and an implantable neurostimulation system. Background Art

[0002] Electrical stimulation of nerve pain relief is a common medical technology that achieves analgesia by delivering electrical stimulation signals to key parts of the patient's body. This technology is usually fully implanted or semi-implanted. Nerve stimulation electrodes generally include electrode contacts and wires. The wires are responsible for transmitting stimulation signals, and the electrode contacts conduct these signals to the target nerve area. The two work closely together to achieve precise stimulation of the nerves.

[0003] However, the production of traditional neurostimulator electrodes is very complicated. Multiple electrode contacts need to be welded to the wires. Because there are a large number of contacts and the fixed state is difficult to control, they must first be fixed to the mold and welded one by one. After welding is completed, the insulating material is covered to form the outer layer of the electrode lead, so that the multiple contacts are stabilized on the electrode. In the process of welding the contacts, the fixation of many contacts requires the help of molds, which adds additional operating steps and costs. And when welding the contacts in the mold, due to the large number of contacts, for the operator, the farther away from the contacts in the mold, the narrower the welding field of view, the more obstructions, and the greater the difficulty of operation. As the number of contacts increases, the complexity and workload of the electrode contact welding operation also increase. Summary of the invention

[0004] The present disclosure aims to reduce the production difficulty of implantable neurostimulator electrodes and improve production efficiency.

[0005] In a first aspect, the present disclosure provides an implantable neurostimulator electrode for an implantable neurostimulation system, wherein the implantable neurostimulator electrode is suitable for being at least partially implanted in a human body and receiving an electrical signal from an implantable pulse generator to apply electrical stimulation to the human body. The implantable neurostimulator electrode includes an elongated body, a plurality of wires, and at least one neurostimulation contact structure. The neurostimulation contact structure is in the shape of a hollow sleeve, suitable for being sleeved on the body, that is, the neurostimulation contact structure can be independently processed and assembled to the body. Each neurostimulation contact structure includes at least two contacts, and when the neurostimulation contact structure is sleeved on the body, each contact on the neurostimulation contact structure is electrically connected to a corresponding wire.

[0006] After the nerve stimulation contact structure provided by the present disclosure is sleeved on the main body, the operator can weld the corresponding wire to the contact without shielding or with little shielding, thereby reducing the difficulty of welding the contact to the wire. In addition, the independently processed nerve stimulation contact structure can avoid the limitation of traditional mold processing to implant the electrode of the nerve stimulator, realize the parallel processing of the nerve stimulation contact structure and the main body, and improve the speed and production efficiency.

[0007] In an exemplary real-time example, at least one nerve stimulation contact structure is at least two nerve stimulation contact structures. Each nerve stimulation contact structure also includes a substrate, each contact is inlaid with the substrate, and along the axial direction of the nerve stimulation contact structure, the length of the contact is less than the length of the substrate. So that adjacent contacts in adjacent nerve stimulation contact structures are separated from each other by the substrate, and then along the axial direction of the main body, adjacent nerve stimulation contact structures are abutted, and the nerve stimulation contact structure can completely cover the outer surface of the main body at the input end or output end, without considering the adaptive processing of the contact of the main body provided with the wire. If the length of the contact is equal to the length of the substrate, in order to ensure that the adjacent contacts along the axial direction of the main body are electrically isolated from each other to prevent the mixing of stimulation signals, the main body needs to set additional isolation parts on the periphery to play the role of electrical isolation between the contacts, which increases the overall processing difficulty and reduces the processing efficiency of the implanted nerve stimulator electrode, reduces the difficulty of installing the contacts, and improves the production efficiency of the electrode lead.

[0008] In an exemplary embodiment, each nerve stimulation contact structure includes at least one notch in the side wall. Each notch penetrates the side wall in a radial direction, and each notch corresponds to a contact, that is, each notch corresponds to a wire; each notch penetrates a corresponding contact, and one end of each wire passes through a corresponding notch and is electrically connected to the corresponding contact at the corresponding notch.

[0009] When a nerve stimulation contact structure is mounted on the main body, one end of the corresponding wire is then welded to the contact. In order to ensure that the welder has sufficient welding vision, one end of the wire must be bypassed from one end of the nerve stimulation contact structure and welded to the outer surface of the contact. However, the adjacent nerve stimulation contact structure will be difficult to form a seal due to the wire, and vice versa. When welding one end of the wire to the contact, the gap provided by the present invention can provide the welder with a welding point that is completely exposed to the field of vision, thereby improving the visual welding conditions of the welder and ensuring that the adjacent nerve stimulation contact structures will not be affected by the electrode leads. The tight fit between each other is achieved.

[0010] In an exemplary embodiment, the notch exposes at least the thickness side of the contact. Since the outer surface of the contact is exposed to the patient's tissue when in use, in this embodiment, the notch is set to expose at least the thickness side of the contact, so that the welding point from the wire to the contact can be set on the thickness side of the contact, to ensure that the outer surface of the contact does not have hidden dangers that can cause harm to the patient.

[0011] In an exemplary embodiment, the body and the contact are separated by a substrate, and the substrate is made of an insulating material, so as to prevent the contact from contacting other parts of the wire except the end point.

[0012] In an exemplary embodiment, the notch includes a first sub-notch and a second sub-notch, the first sub-notch passes through the substrate, the second sub-notch passes through the contact, and the second sub-notch exposes at least a portion of the outer surface of the substrate.

[0013] When one end of the wire is soldered to the corresponding contact, a large amount of solder residue is easily formed. In order to avoid the accumulation of solder affecting the assembly of the neural stimulation contact structure and to avoid the solder rubbing against the insulation layer of the remaining wires, causing the wires to be exposed and contacted with each other, resulting in mixed effects of electrical stimulation signals, the present disclosure divides the gap into a first sub-gap and a second sub-gap, and the second sub-gap at least exposes at least a portion of the outer surface of the substrate, so that the solder can be accumulated in the area supported by the second sub-gap and the outer surface of the substrate.

[0014] In an exemplary embodiment, the wire is arranged on the outer surface of the body, and the inner diameter of the nerve stimulation contact structure is equal to the sum of the wire diameter of the wire and the outer diameter of the body. The wire is arranged on the outer surface of the body in a winding manner. In order to avoid the wire being wound around the body and becoming loose, which ultimately affects the firmness of the welding point between the wire and the contact, the present disclosure sets the inner diameter of the nerve stimulation contact structure to be equal to the sum of the wire diameter of the wire and the outer diameter of the body, so as to avoid the wire being loose.

[0015] In an exemplary embodiment, the wire is arranged in the body, and the inner diameter of the nerve stimulation contact structure is equal to the outer diameter of the body. The wire is arranged in the body, and one end thereof for welding to the contact extends out from the outer surface of the body. After welding, in order to prevent the tension at the welding point between the wire and the contact from being stable, the present disclosure sets the inner diameter of the nerve stimulation contact structure equal to the outer diameter of the body to fix the relative position of the sleeve and the body, thereby ensuring the firmness of the welding point between the wire and the contact.

[0016] In an exemplary embodiment, the implantable neurostimulator electrode further includes a main body sleeve, which is sleeved on the main body and surrounds the plurality of wires, and at least one end of the main body sleeve is connected to one of the plurality of neurostimulation contact structures to provide support for the neurostimulation contact structure.

[0017] In another aspect, the present disclosure provides an implanted neural stimulation system, comprising an implanted neural stimulator electrode provided according to the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate some embodiments of the present disclosure, not all.

[0019] It should be understood that the same or similar reference numerals are used in the drawings to represent the same or similar elements (members or components).

[0020] It should be understood that the drawings are merely schematic and that the sizes and proportions of the elements (components or components) in the drawings are not necessarily accurate.

[0021] Figure 1 The figure shows an exemplary structural diagram of an implantable neural stimulation system provided according to an embodiment of the present disclosure.

[0022] Figure 2 The figure shows a schematic diagram of the exploded structure of an implanted neural stimulator electrode provided according to an embodiment of the present disclosure.

[0023] Figure 3 The figure shows a schematic structural diagram of a nerve stimulation contact structure provided according to an embodiment of the present disclosure.

[0024] Figure 4 Another exploded structural schematic diagram of an implantable neurostimulator electrode provided according to an embodiment of the present disclosure is illustrated.

[0025] Figure 5 The figure shows a schematic structural diagram of a nerve stimulation contact structure provided according to an embodiment of the present disclosure.

[0026] Figure 6 The figure shows a partial structural schematic diagram of an implantable neurostimulator electrode provided according to an embodiment of the present disclosure.

[0027] Figure 7 Picture shows Figure 6 An enlarged schematic diagram of area D is shown in FIG.

[0028] Figure 8 The figure shows a schematic structural diagram of a nerve stimulation contact structure provided according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments.

[0030] like Figure 1 As shown, in an exemplary embodiment, the present disclosure provides an implantable neurostimulation system suitable for implantation in a patient's body to apply electrical stimulation to a target area to achieve an analgesic effect. The implantable neurostimulation system includes an implantable neurostimulator electrode 10 and an implantable pulse generator (IPG) 20. The input end of the implantable neurostimulator electrode 10 is connected to the IPG 20, and the output end at the far end is used to transmit the electrical signal from the IPG 20 to the output end, and deliver electromagnetic pulses to the target to be stimulated in the patient's body via the output end, thereby achieving electrical stimulation of the target area.

[0031] like Figure 2-Figure 3 As shown, in an exemplary embodiment, the implantable neurostimulator electrode 10 includes an elongated body 11, a plurality of wires 12 and at least one neurostimulation contact structure 13. The plurality of wires 12 are arranged on the body 11 and at least partially exposed to the outer surface of the body 11. The neurostimulation contact structure 13 is applied to the output end of the implantable neurostimulator electrode 10. In other embodiments, the neurostimulation contact structure 13 is also applied to the input end of the implantable neurostimulator electrode 10. The following description takes the application of the neurostimulation contact structure 13 to the output end of the implantable neurostimulator electrode 10 as an example. The neurostimulation contact structure 13 is in the shape of a hollow sleeve with two ends passing through. Each neurostimulation contact structure 13 includes at least two contacts 131. When the neurostimulation contact structure 13 is sleeved on the body 11, each contact 131 on the neurostimulation contact structure 13 is electrically connected to a corresponding wire 12, which can be connected to any side of the contact 131. At least one neurostimulation contact structure 13 is sleeved on the body 11 and surrounds the plurality of wires 12. The outer surface of the contact 131 is exposed to the outer surface of the nerve stimulation contact structure 13 , and the contact 131 can be located at any part of the nerve stimulation contact structure 13 .

[0032] The nerve stimulation contact structure 13 provided by the present disclosure is assembled on the main body 11, so that after each section of the nerve stimulation contact structure 13 is sleeved on the main body 11, the operator can weld the corresponding wire 12 to the contact 131 without shielding or with little shielding, thereby reducing the difficulty of welding the contact 131 to the wire 12. In addition, the segmented nerve stimulation contact structure 13 can avoid the limitation of traditional mold processing, realize the parallel processing of the nerve stimulation contact structure 13, and improve the speed and production efficiency.

[0033] In an exemplary real-time example, continue to see Figure 2-Figure 3, at least one nerve stimulation contact structure 13 is at least two nerve stimulation contact structures 13. Each nerve stimulation contact structure 13 also includes a substrate 133, each contact 131 is inlaid and matched with the substrate 133, and along the axial direction of the nerve stimulation contact structure 13, the length 131 of the contact is less than the length of the substrate 133. If the length of the contact 131 is equal to the length of the substrate 133, in order to ensure that the adjacent contacts 131 along the axial direction of the main body 11 are electrically isolated from each other to prevent the stimulation signals from mixing, the main body 11 needs to set additional isolation parts on the periphery to play the role of electrical isolation between the contacts 131, which increases the overall processing difficulty of the implanted neurostimulator electrode 10 and reduces the processing efficiency. So that adjacent contacts 131 in adjacent nerve stimulation contact structures 13 are separated from each other by the base 133, and then adjacent nerve stimulation contact structures 13 are abutted against each other along the axial direction of the main body. The nerve stimulation contact structure 13 can completely cover the outer surface of the main body 11 at the input end or the output end. There is no need to consider the adaptive processing of the contacts 131 on the main body provided with the wires, thereby reducing the installation difficulty of the implanted nerve stimulator electrode 10 and improving the production efficiency of the implanted nerve stimulator electrode 10.

[0034] Each nerve stimulation contact structure 13 further includes a base 133, and each contact 131 is inlaid with the base 133. When one of the multiple nerve stimulation contact structures 13 is sleeved on the main body 11, each contact 131 on the nerve stimulation contact structure 13 is electrically connected to a corresponding wire 12. The number of the multiple nerve stimulation contact structures 13 can be 2, 3, 4, 5, 6, 7, 8, etc., and two adjacent nerve stimulation contact structures 13 are connected by bonding.

[0035] For example, Figure 2 As shown, a plurality of nerve stimulation contact structures 13 are sequentially sleeved onto the main body 11 provided with the wire 12, and each nerve stimulation contact structure 13 is sleeved in place in the same orientation, for example, all are sleeved starting from the A end, or in other embodiments, all are sleeved starting from the B end.

[0036] When the sleeve is in place, the contact 131 of each nerve stimulation contact structure 13 corresponds to one end of the wire 12. The A end of one nerve stimulation contact structure 13 abuts against the B end of the previous nerve stimulation contact structure 13, so that the outermost surface of the input end or output end of the implanted nerve stimulator electrode 10 is only composed of the nerve stimulation contact structure 13, so that the processing steps of the implanted nerve stimulator electrode 10 can be reduced.

[0037] The size and specifications of each neural stimulation contact structure 13 are the same so that the spacing between adjacent contacts 131 along the length direction of the implanted neural stimulator electrode 10 remains the same, which is conducive to applying more uniform stimulation.

[0038] In an exemplary embodiment, if Figure 4 As shown, the implantable neurostimulator electrode 10 also includes a main body sleeve 14, which is sleeved on the main body 11 and surrounds the multiple wires 12. At least one end of the main body sleeve 14 is connected to one of the multiple neurostimulation contact structures 13 to provide support for the neurostimulation contact structure 13. After the main body sleeve 14 is sleeved in place, the neurostimulation contact structures 13 are sleeved in sequence. The caliber of the main body sleeve 14 is the same as the caliber of the neurostimulation contact structure 13. The two ends of the main body sleeve 14 correspond to the output end and the input end of the implantable neurostimulator electrode 10, respectively. In this embodiment, one end of the main body sleeve 14 is abutted against one end of a neurostimulation contact structure 13 arranged at the output end of the implantable neurostimulator electrode 10.

[0039] In an exemplary embodiment, the wire is arranged on the outer surface of the main body, and the inner diameter of the nerve stimulation contact structure is equal to the sum of the wire diameter of the wire and the outer diameter of the main body, that is, the wire is squeezed and fixed between the main body and the nerve stimulation contact structure. The wire is arranged on the outer surface of the main body in a winding manner. In order to avoid the wire being wound around the main body and becoming loose, which ultimately affects the firmness of the welding point between the wire and the contact, the present disclosure sets the inner diameter of the nerve stimulation contact structure to be equal to the sum of the wire diameter of the wire and the outer diameter of the main body, so as to avoid the wire being loose.

[0040] In an exemplary embodiment, the wire is arranged in the main body, for example, there is a wire channel in the main body, and one end of the wire extends from the outer surface of the main body. The inner diameter of the nerve stimulation contact structure is equal to the outer diameter of the main body. The wire is arranged in the main body, and one end thereof for welding to the contact extends from the outer surface of the main body. After welding, in order to prevent the tension at the welding point between the wire and the contact from being stable, the present disclosure sets the inner diameter of the nerve stimulation contact structure to be equal to the outer diameter of the main body to fix the relative position of the nerve stimulation contact structure and the main body, thereby ensuring the firmness of the welding point P between the wire and the contact.

[0041] In an exemplary embodiment, see Figure 2-Figure 3 , Figure 5-Figure 7, each nerve stimulation contact structure 13 includes at least one notch 132 on the side wall. Each notch 132 penetrates the side wall in the radial direction. When the wire 12 is connected to the contact through the corresponding notch 132, the notch 132 penetrating the side wall does not affect the abutment of the A and B ends of the adjacent nerve stimulation contact structure 13, thereby ensuring the flatness of the surface of the electrode lead. Each notch 132 corresponds to a contact 131, that is, each notch 132 corresponds to a wire 12; each notch 132 penetrates a corresponding contact 131, and one end of each wire 12 passes through a corresponding notch 132 and is electrically connected to the corresponding contact 131 at the corresponding notch 132. Exemplarily, the nerve stimulation contact structure 13 has three contacts 131, and correspondingly, the nerve stimulation contact structure 13 has three notches 132, each notch 132 being closer to one of the contacts 131 than to the notch 132, or even penetrating the contact 131.

[0042] When a nerve stimulation contact structure 13 is sleeved and assembled on the main body 11, one end of the corresponding wire 12 is then welded to the contact 131. In order to ensure that the welder has sufficient welding vision, one end of the wire 12 must be bypassed from one end of the nerve stimulation contact structure 13 and welded to the outer surface of the contact 131, but the adjacent nerve stimulation contact structure 13 will be difficult to form a seal due to the wire 12, and vice versa. When welding one end of the wire 12 to the contact 131, the notch 132 provided in the present disclosure can provide the welder with a welding point P that is completely exposed to the field of vision, thereby improving the visual welding conditions of the welder and ensuring that the adjacent nerve stimulation contact structures 13 will not be affected by the electrode leads. Close fit between each other is achieved, achieving a balance between the two.

[0043] In this embodiment, the notch 132 is an end notch provided at the nerve stimulation contact structure 13. In other embodiments, the notch 132 may also be a perforation provided in the middle of the nerve stimulation contact structure 13. However, the notch 132 at least exposes the thickness side C of the contact 131. Since the outer surface of the contact 131 is exposed to the patient's tissue when in use, in this embodiment, the notch 132 is provided to expose at least the thickness side of the contact 131, so that the welding point P from the wire 12 to the contact 131 can be provided on the thickness side of the contact 131, so as to ensure that the outer surface of the contact 131 does not have hidden dangers that can cause harm to the patient.

[0044] In an exemplary embodiment, the body 11 and the contact 131 are separated by a substrate 133, and the substrate 133 is made of an insulating material, so as to prevent the contact 131 from contacting other parts of the wire 12 except the end point.

[0045] In an exemplary embodiment, the notch 132 includes a first sub-notch 1321 and a second sub-notch 1322, that is, the first sub-notch 1321 and the second sub-notch 1322 are connected, the first sub-notch 1321 penetrates the substrate 133, the second sub-notch 1322 penetrates the contact 131, and the second sub-notch 1322 exposes at least a portion of the outer surface of the substrate 133. In this embodiment, the extension length of the second sub-notch 1322 along the axial direction of the nerve stimulation contact structure 13 exceeds the first sub-notch 1321. In other embodiments, the second sub-notch 1322 and the first sub-notch 1321 may have different widths in the circumferential direction or be circumferentially offset.

[0046] When one end of the wire 12 is soldered to the corresponding contact 131, a large amount of solder residue is easily formed. In order to avoid the accumulation of solder affecting the assembly of the neural stimulation contact structure 13 and to avoid the solder rubbing against the insulation layer of the remaining wires 12, thereby causing the wires 12 to be exposed to each other and causing the mixing of electrical stimulation signals, as well as affecting the flatness of the surface of the contact 131, the present disclosure divides the notch 132 into a first sub-notch 1321 and a second sub-notch 1322, and the second sub-notch 1322 at least exposes at least a portion of the outer surface of the substrate 133, so that the solder can be accumulated in the area supported by the second sub-notch 1322 and the outer surface of the substrate 133.

[0047] In an exemplary embodiment, if Figure 8 As shown, the inner surface of the nerve stimulation contact structure 13 has at least one groove 136, the number of the grooves 136 corresponds to the number of the notches 132, and the grooves 136 are connected to the notches 132. Each groove 136 penetrates the inner surface of the nerve stimulation contact structure 13 along the axial direction. When the nerve stimulation contact structure 13 is sleeved along the axial direction of the main body 11, since the inner diameter of the nerve stimulation contact structure 13 is equal to the outer diameter of the main body 11 provided with the wire 12, in order to avoid motion interference between the end of the wire 12 and the nerve stimulation contact structure 13, the groove 136 is provided so that the end of the wire 12 can smoothly reach the notch 132 through one end of the nerve stimulation contact structure 13. The groove 136 is provided on the base 133, and the depth of the groove 136 is preferably not exposed on the inner surface of the nerve stimulation contact structure 13, so as to prevent the contact 131 from making undesired electrical contact with other wires 12.

[0048] It should be understood that the term “including” and its variations used in the present disclosure are open inclusions, ie, “including but not limited to.” The term “one embodiment” means “at least one embodiment,” and the term “another embodiment” means “at least one additional embodiment.”

[0049] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be thought of by any technician familiar with the technical field within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An implantable neurostimulator electrode for an implantable neurostimulation system, wherein the implantable neurostimulator electrode is adapted to be at least partially implanted in a human body and receive an electrical signal from an implantable pulse generator to apply electrical stimulation to the human body, characterized in that: The implantable neurostimulator electrode comprises: Slender body; multiple conductors; and At least one nerve stimulation contact structure, which is in the shape of a hollow sleeve and is suitable for being mounted on the main body. Each nerve stimulation contact structure includes at least two contacts. When the nerve stimulation contact structure is mounted on the main body, each contact on the nerve stimulation contact structure is electrically connected to a corresponding wire.

2. The implantable neurostimulator electrode according to claim 1, characterized in that: The at least one nerve stimulation contact structure comprises at least two nerve stimulation contact structures, each of which further comprises a base, each contact is inlaid and matched with the base, and along the axial direction of the nerve stimulation contact structure, the length of the contact is less than the length of the base.

3. The implantable neurostimulator electrode according to claim 2, characterized in that: Each nerve stimulation contact structure includes at least one notch in the side wall, each notch penetrates the side wall in the radial direction, and each notch corresponds to a contact; each notch penetrates a corresponding contact, and one end of the wire corresponding to each contact passes through a corresponding notch and is electrically connected to the corresponding contact.

4. The implantable neurostimulator electrode according to claim 3, characterized in that: The notch exposes at least a thickness side of the contact.

5. The implantable neurostimulator electrode according to claim 4, characterized in that: The body and the contacts are separated by the substrate, and the substrate is made of insulating material.

6. The implantable neurostimulator electrode according to claim 5, characterized in that: The notch includes a first sub-notch and a second sub-notch, the first sub-notch passes through the substrate, the second sub-notch passes through the contact, and the second sub-notch at least partially exposes the outer surface of the substrate.

7. The implantable neurostimulator electrode according to claim 1, characterized in that: The wire is arranged on the outer surface of the main body, and the inner diameter of the nerve stimulation contact structure is equal to the sum of the wire diameter of the wire and the outer diameter of the main body.

8. The implantable neurostimulator electrode according to claim 1, characterized in that: The wire is arranged in the body, and the inner diameter of the nerve stimulation contact structure is equal to the outer diameter of the body.

9. The implantable neurostimulator electrode according to claim 2, characterized in that: It also includes a main body sleeve, which is sleeved on the main body and surrounds the multiple wires. At least one end of the main body sleeve is connected to one of the multiple nerve stimulation contact structures.

10. An implantable neural stimulation system, characterized in that: Comprising an implantable neurostimulator electrode according to any one of claims 1-9.

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