Implantable lead and nerve stimulation system

Abstract

The utility model discloses an implantable lead and a nerve stimulation system. The implantable lead comprises a first section connected with other equipment, a second section extending in the opposite direction of the first section, and a middle section arranged between the first section and the second section. The first section comprises a plurality of first contacts, the second section comprises a plurality of second contacts, the first contacts and the second contacts are electrically connected through a plurality of guide wires, the middle section comprises an outer sleeve, and the guide wires extend and penetrate through the outer sleeve. The implantable wire further comprises an insulating part, a groove is formed in the peripheral surface of the insulating part, the guide wire is located in the groove, and the insulating part is arranged in the outer sleeve. According to the implantable wire, the insulation performance between the guide wires can be improved, short circuit between the guide wires is avoided, the overall structural strength of the implantable wire can be improved, and the implantable wire is prevented from being pressed and deformed.

Description

Technical Field

[0001] This utility model relates to the field of implantable medical device technology, and in particular to an implantable lead wire and nerve stimulation system. Background Technology

[0002] Electrical stimulation therapy has become an important treatment method, using pulsed currents of different frequencies to stimulate nerve or muscle tissue. Implantable leads, as a key component, bear the core function of transmitting electrical signals. One end of the implantable lead is inserted into the patient's affected area, while the other end is typically electrically connected to other functional modules. These other modules, such as stimulators, provide stimulation signals to the implantable lead and deliver electrical stimulation to the patient's affected area through the implantable lead.

[0003] In existing technologies, implantable leads typically consist of multiple wires and an external protective structure. The implantable lead is divided into a first segment, a middle segment, and a second segment. The first contact of the first segment and the second contact of the second segment are electrically connected via the wires. Each wire includes a conductor and an insulating layer. The insulating layer prevents the conductors from insulating each other. However, under prolonged bending or twisting, the insulating layer is prone to wear, causing short circuits between the conductors.

[0004] Therefore, existing implantable leads need to be improved. Summary of the Invention

[0005] The purpose of this invention is to provide an implantable lead wire and a nerve stimulation system that can not only improve the insulation performance between guide wires and prevent short circuits between guide wires, but also improve the overall structural strength of the implantable lead wire and prevent the implantable lead wire from being deformed under pressure.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] An implantable lead includes a first segment connected to other devices, a second segment extending in the opposite direction to the first segment, and an intermediate segment disposed between the first segment and the second segment;

[0008] The first segment includes a plurality of first contacts, the second segment includes a plurality of second contacts, the first contacts and the second contacts are electrically connected by a plurality of guide wires, and the middle segment includes an outer sleeve, the guide wires extending through the outer sleeve;

[0009] The implantable lead also includes an insulating component, the outer peripheral surface of which is provided with a groove, the guide wire is located in the groove, and the insulating component is disposed inside the outer sheath.

[0010] Preferably, the insulating element is made of an elastic material.

[0011] Preferably, the elastic material is a polymer material.

[0012] Preferably, a separator is provided between adjacent grooves, the separator being used to separate adjacent guidewires from each other.

[0013] Preferably, the number of insulating elements is one or more. When the number of insulating elements is one, the insulating element is an integral structure. When the number of insulating elements is multiple, the multiple insulating elements are segmented structures.

[0014] Preferably, the insulating member includes a first insulating portion and a second insulating portion disposed in the intermediate section, a portion of the second insulating portion is disposed in the first section, and the remaining portion of the second insulating portion is disposed at one end of the intermediate section near the first section, and the hardness of the second insulating portion is greater than the hardness of the first insulating portion.

[0015] Preferably, the insulating element is a hollow structure or a solid structure.

[0016] Preferably, a plurality of the guide wires are spirally wound along the axial direction of the implantable wire, the grooves are spirally structured along the axial direction of the implantable wire, and the guide wires and the grooves are arranged in a one-to-one correspondence.

[0017] Preferably, the guide wire and the insulating element are integrally formed, or the guide wire and the insulating element are separate parts.

[0018] Preferably, the guide wire, the insulating element, and the outer sheath are integrally formed.

[0019] A neural stimulation system, comprising:

[0020] Stimulator;

[0021] The implantable lead as described in any of the above claims is one or both of electrode leads and extension leads;

[0022] When the implantable lead is an electrode lead, one end of the electrode lead is implanted in the patient's body, and the other end of the electrode lead is electrically connected to the stimulator.

[0023] When one of the implanted leads is an electrode lead and the other is an extension lead, the second segment of the electrode lead is implanted in the patient's body, the first segment of the electrode lead is electrically connected to the second segment of the extension lead, and the first segment of the extension lead is electrically connected to the stimulator, so that the stimulator is electrically connected to the electrode lead through the extension lead.

[0024] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0025] This invention relates to an implantable lead and nerve stimulation system. By providing a groove on the outer circumferential surface of an insulating component, the guidewire can be positioned within the groove. The insulating component not only provides support and protection for the guidewire, preventing it from breaking under stress or the insulation layer from being damaged, but also improves the overall structural strength of the implantable lead, thus preventing deformation under pressure. Furthermore, the groove can separate adjacent guidewires, improving the insulation performance between them. Even if the insulation layer of a guidewire is damaged, it can prevent contact between adjacent guidewires, avoiding short circuits and ensuring the stability and safety of the implantable lead. This, in turn, improves the treatment effect on patients and avoids damage to them, while also extending the service life of the implantable lead. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention where the implantable lead is an electrode lead.

[0027] Figure 2 This is an exploded view of an embodiment of the present invention where the implantable lead is an electrode lead.

[0028] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0029] Figure 4 This is a schematic diagram of the planar structure of the implantable lead wire as an electrode lead wire in an embodiment of this utility model.

[0030] Figure 5 It is along Figure 4 A cross-sectional view of line AA in the middle.

[0031] Figure 6 yes Figure 5 A magnified view of a portion of point B in the middle.

[0032] Figure 7 This is a three-dimensional structural diagram of the insulating component in an embodiment of this utility model.

[0033] Figure 8 This is a three-dimensional structural diagram of the guide wire in an embodiment of this utility model.

[0034] In the diagram: 100, implanted wire; 1, first segment; 11, first contact; 12, isolation ring; 13, locking ring; 2, second segment; 21, second contact; 22, insulating ring; 23, plug; 3, intermediate segment; 31, outer sheath; 32, inner liner; 4, guide wire; 41, spiral hole; 42, conductor; 43, insulation layer; 5, insulating component; 51, first insulating part; 52, second insulating part; 53, third insulating part; 54, groove; 55, separator; 6, support part. Detailed Implementation

[0035] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0036] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0037] Reference Figures 1 to 8 This utility model provides an implantable lead 100, which includes a first segment 1 connected to other devices, a second segment 2 extending in the opposite direction to the first segment 1, and an intermediate segment 3 disposed between the first segment 1 and the second segment 2. The first segment 1 can be electrically connected to other functional modules, which may include a stimulator (not shown). The first segment 1 can be inserted into the stimulator so that the first contact 11 of the first segment 1 is electrically connected to the stimulator.

[0038] The implantable lead 100 can be one or both of the following: an electrode lead and an extension lead. That is, the implantable lead 100 can be an electrode lead or an extension lead. The electrode lead and the extension lead have similar structures, but the difference lies in the following: the second segment 2 of the electrode lead can be implanted into the patient's body; the first segment 1 of the electrode lead can be electrically connected to either the stimulator or the second segment 2 of the extension lead; however, the second segment 2 of the extension lead can only be electrically connected to the first segment 1 of the electrode lead, and the first segment 1 of the extension lead can only be electrically connected to the stimulator. The first segment 1 of the electrode lead and the first segment 1 of the extension lead have the same or similar structures, the middle segment 3 of the electrode lead and the middle segment 3 of the extension lead have the same or similar structures, while the second segment 2 of the electrode lead and the second segment 2 of the extension lead have different structures.

[0039] In this embodiment, the implantable lead 100 is used as the electrode lead for illustration.

[0040] Reference Figure 1 , Figure 2The first segment 1 and the second segment 2 can be respectively located at both ends of the intermediate segment 3, which serves to connect the first segment 1 and the second segment 2. The intermediate segment 3 is used to transmit the stimulation signal from the first segment 1 to the second segment 2; that is, the guidewire 4 within the intermediate segment 3 transmits the stimulation signal from the first segment 1 to the second segment 2, which then provides electrical stimulation to the patient's affected area. Given a fixed length for the second segment 2, the length of the intermediate segment 3 determines the overall length of the implantable lead 100, ensuring that the second segment 2 can be implanted sufficiently deep into the patient's body.

[0041] Specifically, refer to Figure 1 , Figure 2 The first segment 1 may include a plurality of first contacts 11, that is, the first segment 1 is provided with one or more first contacts 11. In this embodiment, the first segment 1 may be provided with multiple first contacts 11, and the stimulator can provide multiple stimulation signals through the multiple first contacts 11. The multiple first contacts 11 are spaced apart from each other to avoid mutual interference between the first contacts 11, thereby avoiding mutual interference between the stimulation signals of the stimulator. The first contacts 11 of the first segment 1 may be one or more of the following shapes: sheet-like or ring-shaped, which can be set according to actual needs. In this embodiment, the first contacts 11 of the first segment 1 are ring-shaped.

[0042] Reference Figure 1 , Figure 2 When the implanted lead 100 is an electrode lead, the second segment 2 may include a plurality of second contacts 21, that is, the second segment 2 is provided with one or more second contacts 21. In this embodiment, the second segment 2 may be provided with multiple second contacts 21, which can electrically stimulate multiple affected areas of the patient. The second contacts 21 are exposed on the outer surface of the second segment 2 to ensure that the second contacts 21 can have good contact with the affected areas of the patient, thereby ensuring that the second contacts 21 can electrically stimulate the affected areas of the patient. The second contacts 21 of the second segment 2 may be one or more of sheet-like or ring-shaped, and can be set according to actual needs.

[0043] Reference Figure 1 , Figure 2 , Figure 8 The first contact 11 and the second contact 21 can be electrically connected via a plurality of guide wires 4. Each guide wire 4 may include a conductor 42 and an insulating layer 43, with the insulating layer 43 covering the conductor 42. Each guide wire 4 may include at least one conductor 42, i.e., each guide wire 4 may include one or more conductors 42. In this embodiment, each guide wire 4 includes one conductor 42. The insulating layer 43 can electrically isolate the conductor 42 from other components, ensuring that the conductor 42 transmits the stimulation signal from the first contact 11 to the second contact 21, which then provides electrical stimulation to the patient's affected area. When there are multiple guide wires 4, the insulating layer 43 can also prevent adjacent guide wires 4 from interfering with each other.

[0044] Reference Figure 2 , Figure 3 Preferably, a plurality of guide wires 4 are spirally wound along the axial direction of the implantable wire 100 and form spiral holes 41. At least a portion of the insulating member 5 can be disposed within the spiral holes 41, which can increase the tensile strength and bending strength of the implantable wire 100, ensure smooth implantation of the implantable wire 100, and prevent the implantable wire 100 from breaking. When the first contact 11 is annular, the first contact 11 can be sleeved on the outside of the spiral guide wire 4. The number of first contacts 11, the number of second contacts 21, and the number of guide wires 4 are preferably the same, and the first contacts 11, the second contacts 21, and the guide wires 4 are arranged in a one-to-one correspondence, that is, the two ends of a guide wire 4 are respectively connected to a first contact 11 and a second contact 21.

[0045] Reference Figure 2 , Figure 3 The intermediate segment 3 may include an outer sheath 31, through which the guidewire 4 extends, meaning at least a portion of the guidewire 4 is within the outer sheath 31. The outer sheath 31 may be a hollow cylinder. The outer sheath 31 is in direct contact with the patient, protecting the guidewire 4 from physical and chemical damage. The outer sheath 31 is made of high-molecular materials, such as medical-grade silicone, polyurethane, PET (polyethylene terephthalate), PTFE (polytetrafluoroethylene), FEP (fluorinated ethylene propylene copolymer), or TPE (thermoplastic elastomer), to ensure that the outer sheath 31 maintains sufficient strength while retaining a certain degree of flexibility to withstand tensile and compressive stresses in the implantation environment. The outer sheath 31 is also biocompatible, ensuring that it will not cause immune responses or other adverse reactions upon contact with the patient.

[0046] Reference Figure 2 , Figure 3 The intermediate section 3 may also include an inner liner tube 32. The inner liner tube 32 may be a hollow cylinder. The inner liner tube 32 is sleeved on the guide wire 4 and located inside the outer tube 31. The inner liner tube 32 not only protects the guide wire 4, but also facilitates the insertion of the guide wire 4 into the outer tube 31.

[0047] As a preferred method, refer to Figure 1 , Figure 2 The first segment 1 may further include a plurality of isolation rings 12, that is, the first segment 1 is provided with one or more isolation rings 12. In this embodiment, there are multiple isolation rings 12, and the isolation rings 12 are spaced apart from the first contacts 11, so that the multiple first contacts 11 are spaced apart, which can ensure that the first contacts 11 are mutually insulated. The shape of the isolation rings 12 is preferably annular. The multiple isolation rings 12 and the multiple first contacts 11 can be arranged closely together.

[0048] Reference Figure 1, Figure 2 The first segment 1 may also include a locking ring 13, which is located at one end of the first segment 1 near the middle segment 3. During use, when the implantable wire 100 is inserted into other functional modules, the screws on the functional modules can press against the locking ring 13 to secure the implantable wire 100 and the functional modules together. The locking ring 13 is made of a material with high structural strength, preferably metal, to ensure sufficient structural strength. An isolation ring 12 may be provided between the locking ring 13 and the first contact 11 to ensure insulation between them.

[0049] Reference Figure 1 , Figure 2 When the implantable lead 100 is an electrode lead, the second segment 2 may further include a plug 23 and several insulating rings 22. The plug 23 may be located at the end of the second segment 2 away from the middle segment 3, and the end of the plug 23 facing the patient has a smooth end face, such as a hemispherical protrusion. The plug 23 not only seals the second segment 2, preventing the patient's tissue fluid from entering the interior of the second segment 2, but also reduces damage to human tissue when the implantable lead 100 is inserted. The insulating rings 22 are spaced apart from the second contacts 21, ensuring that the second contacts 21 are insulated from each other. The insulating rings 22 are preferably annular in shape. The multiple insulating rings 22 and the multiple second contacts 21 can be arranged closely together.

[0050] Among them, reference Figure 2 , Figure 7 The implantable lead 100 may further include an insulating element 5, which may be disposed within the outer sheath 31. The insulating element 5 is preferably made of a non-metallic material. A groove 54 may be provided on the outer peripheral surface of the insulating element 5, and a guide wire 4 may be located within the groove 54. Preferably, only one guide wire 4 is disposed within each groove 54. In some embodiments, multiple guide wires 4 may be disposed within one groove 54. The groove 54 can separate adjacent guide wires 4, thereby improving the insulation performance between the guide wires 4. The depth of the groove 54 may be greater than or equal to the wire diameter of the guide wire 4, thus ensuring that the guide wire 4 is completely located within the groove 54, improving the stability of the guide wire 4's position. The depth of the groove 54 may also be less than the wire diameter of the guide wire 4, thus ensuring the structural strength of the insulating element 5, increasing the support force on the guide wire 4, and thereby improving the overall structural strength of the implantable lead 100.

[0051] Reference Figure 2The insulating member 5 may include a first insulating portion 51 disposed in the intermediate section 3, which may be disposed inside the outer sleeve 31. The first insulating portion 51 may cover the entire intermediate section 3 along its length, or it may be disposed in only a portion of the intermediate section 3. For example, the first insulating portion 51 may be divided into two sections, with each section of the first insulating portion 51 disposed near one end of the intermediate section 3. A portion of the first insulating portion 51 may also be disposed in the second section 2, or in the first section 1.

[0052] As a preferred embodiment, the insulating component 5 is made of an elastic material, which can be a polymer material such as polyurethane, silicone rubber, ETFE (ethylene-tetrafluoroethylene copolymer), PTFE (polytetrafluoroethylene), Pebax (polyetheramide), PP (polypropylene), TPU (thermoplastic polyurethane elastomer), etc. This insulating component 5 has a certain degree of rigidity to provide sufficient support for the guide wire 4, while also possessing a certain degree of flexibility to meet the bending requirements of the implanted lead 100.

[0053] When the implanted lead 100 is an electrode lead, the insulating member 5 can be a hollow structure. When the implanted lead 100 is an extension lead, the insulating member 5 can be either a hollow structure or a solid structure. When the insulating member 5 is a hollow structure, it is a hollow cylinder, which not only reduces its weight but also gives it better flexibility. When the insulating member 5 is a solid structure, it increases its structural strength and provides better support for the guide wire 4.

[0054] As a preferred method, refer to Figure 7 A separator 55 may be provided between adjacent grooves 54 to separate adjacent guide wires 4. The distribution of the separators 55 corresponds to the distribution of the grooves 54, or in other words, grooves 54 are formed between adjacent separators 55.

[0055] The distribution of grooves 54 on the insulating member 5 matches the distribution of guide wires 4. When the guide wires 4 are spirally wound along the axial direction of the implantable wire 100, the grooves 54 are spirally structured along the axial direction of the implantable wire 100. The guide wires 4 and grooves 54 are arranged in a one-to-one correspondence to ensure that the guide wires 4 and grooves 54 fit more tightly and prevent the guide wires 4 from falling out of the grooves 54.

[0056] The guide wire 4 and the insulating component 5 can be integrally formed, or they can be separate parts. As an example, the guide wire 4 and the insulating component 5 can be fixedly connected together; first, the guide wire 4 is wound into a spiral shape, and then the insulating component 5 is formed by dip coating. Alternatively, the guide wire 4 and the insulating component 5 can be separated, with the guide wire 4 directly wound into the groove 54 of the insulating component 5.

[0057] More preferably, the guide wire 4, the insulating element 5, and the outer sheath 31 can be integrally formed, which can further provide support for the guide wire 4, protect the guide wire 4, prevent the guide wire 4 from breaking under stress or the insulation layer 43 from being damaged, and also improve the overall structural strength of the implanted wire 100, thereby preventing the implanted wire 100 from being deformed under pressure.

[0058] In this application, by providing a groove 54 on the outer peripheral surface of the insulating member 5, the guide wire 4 can be located in the groove 54. The insulating member 5 not only provides support for the guide wire 4 and protects it from breakage due to stress or damage to the insulation layer 43, but also improves the overall structural strength of the implantable lead 100, thereby preventing deformation under pressure. Moreover, the groove 54 can separate adjacent guide wires 4, improving the insulation performance between them. Even if the insulation layer 43 of the guide wire 4 is damaged, it can prevent adjacent guide wires 4 from contacting each other, thus preventing short circuits between the guide wires 4. This ensures the stability and safety of the implantable lead 100, thereby improving the treatment effect on the patient and avoiding damage to the patient, while also extending the service life of the implantable lead 100. At the same time, the insulating member 5 does not affect the overall outer diameter of the implantable lead 100, ensuring that the implantable lead 100 retains its original shape.

[0059] In one specific embodiment, the number of insulating elements 5 can be one or more. When there is only one insulating element 5, the insulating element 5 is an integral structure, that is, the guide wire 4 is disposed on the same insulating element 5. When there are multiple insulating elements 5, the multiple insulating elements 5 can be a segmented structure, that is, the guide wire 4 can be disposed on multiple insulating elements 5 simultaneously.

[0060] Reference Figure 2 When the implantable lead 100 is an electrode lead or an extension lead, the insulating member 5 may further include a second insulating portion 52. The second insulating portion 52 may be disposed at least partially on the first segment 1 and the middle segment 3 near the end of the first segment 1, that is, a portion of the second insulating portion 52 may be disposed on the first segment 1, and the remaining portion of the second insulating portion 52 may be disposed on the middle segment 3 near the end of the first segment 1. Taking the implantable lead 100 as an electrode lead as an example, when the first segment 1 is inserted into the stimulator or the extension lead, the portion of the implantable lead 100 at the joint between the first segment 1 and the middle segment 3 needs to have a certain rigidity to meet the insertion and extraction requirements, and also needs a certain flexibility to meet the bending requirements. The second insulating portion 52 may also be provided with a groove 54. On the one hand, the groove 54 of the second insulating portion 52 is locked with the guide wire 4, so that the guide wire 4 has sufficient axial support, and at the same time, it can prevent the implantable lead 100 from being flattened when holding the implantable lead 100. On the other hand, the second insulating portion 52 can meet certain bending requirements.

[0061] The hardness of the second insulating part 52 is greater than that of the first insulating part 51, ensuring that the second insulating part 52 has sufficient structural strength. The material of the first insulating part 51 can be polyurethane, silicone rubber, ETFE (ethylene-tetrafluoroethylene copolymer), PTFE (polytetrafluoroethylene), etc., while the material of the second insulating part 52 can be Pebax (polyetheramide), PP (polypropylene), TPU (thermoplastic polyurethane elastomer), etc. The second insulating part 52 and the first insulating part 51 can also be made of the same material, and the hardness of the second insulating part 52 can be made greater than that of the first insulating part 51 through physical or chemical processes.

[0062] When the implantable lead 100 is an electrode lead, the insulating member 5 may further include a third insulating portion 53, which may be disposed at least partially on one end of the second segment 2 and the intermediate segment 3 near the second segment 2. When the second segment 2 is inserted into the patient's body, the portion of the implantable lead 100 at the mating point of the second segment 2 and the intermediate segment 3 needs to have a certain rigidity to meet insertion and extraction requirements, and also needs a certain flexibility to meet bending requirements. The third insulating portion 53 may also be provided with a groove 54. On the one hand, the groove 54 of the third insulating portion 53 is locked with the guide wire 4, so that the guide wire 4 has sufficient axial support, and at the same time, it can prevent the implantable lead 100 from being flattened when holding it. On the other hand, the third insulating portion 53 can meet certain bending requirements.

[0063] The hardness of the third insulating part 53 is greater than that of the first insulating part 51, ensuring that the third insulating part 53 has sufficient structural strength. The material of the first insulating part 51 can be polyurethane, silicone rubber, ETFE (ethylene-tetrafluoroethylene copolymer), PTFE (polytetrafluoroethylene), etc., while the material of the third insulating part 53 can be Pebax (polyetheramide), PP (polypropylene), TPU (thermoplastic polyurethane elastomer), etc. The third insulating part 53 and the first insulating part 51 can also be made of the same material, and the hardness of the third insulating part 53 can be made greater than that of the first insulating part 51 through physical or chemical processes.

[0064] The first insulating part 51, the second insulating part 52, and the third insulating part 53 can be separate, meaning they are independently arranged. Alternatively, they can be integral, meaning they are connected as one piece or formed as a single unit. As an example, the first insulating part 51 may be divided into two segments, one of which can be integrally formed with the second insulating part 52, and the other segment can be integrally formed with the third insulating part 53.

[0065] Reference Figure 2 , Figure 3 , Figure 5 , Figure 6 The implantable lead 100 may further include a support portion 6, at least partially disposed in the first segment 1. The support portion 6 may be disposed within the spiral hole 41 of the guide wire 4 in the first segment 1, or partially disposed within the hollow of the third insulating portion 53. The support portion 6 is preferably made of a non-metallic material. The support portion 6 provides support for the spiral guide wire 4, thereby improving the structural strength of the first segment 1. In some embodiments, a portion of the support portion 6 may also extend to the intermediate segment 3, or partially disposed within the hollow of the first insulating portion 51, thereby improving the structural strength of the intermediate segment 3 near the end of the first segment 1.

[0066] This invention also provides a nerve stimulation system, which may include a stimulator and the aforementioned implantable lead 100. The implantable lead 100 may be one or both of electrode leads and extension leads.

[0067] When the implantable lead 100 is an electrode lead, the second segment 2 of the electrode lead can be implanted into the patient's body, and the first segment 1 of the electrode lead is electrically connected to the stimulator. In use, the user holds the middle segment 3 of the electrode lead near the end of the first segment 1 and inserts the first segment 1 into the stimulator. The stimulator can be a pulse generator, which transmits stimulation signals to the patient's affected area via the implantable lead 100. The second contact 21 of the second segment 2 provides electrical stimulation to the patient's affected area.

[0068] When one implantable lead 100 is an electrode lead and the other is an extension lead, the second segment 2 of the electrode lead can be implanted into the patient's body. The first segment 1 of the electrode lead can be electrically connected to the second segment 2 of the extension lead, and the first segment 1 of the extension lead can be electrically connected to the stimulator, so that the stimulator is electrically connected to the electrode lead through the extension lead. In use, the user holds the middle segment 3 of the electrode lead near the end of the first segment 1 and inserts the first segment 1 of the electrode lead into the second segment 2 of the extension lead. The user holds the middle segment 3 of the extension lead near the end of the first segment 1 and inserts the first segment 1 of the extension lead into the stimulator. The first segment 1 of the extension lead can be electrically connected to the stimulator, and the extension lead can transmit the stimulation signal from the stimulator to the first contact 11 of the first segment 1 of the electrode lead. The first contact 11 of the first segment 1 of the electrode lead transmits the stimulation signal through the guide wire 4 to the second contact 21 of the second segment 2 of the electrode lead, and the second contact 21 of the second segment 2 of the electrode lead provides electrical stimulation to the patient's affected area.

[0069] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. An implantable lead, characterized in that, The implantable lead comprises a first segment for connecting with other devices, a second segment extending in the opposite direction of the first segment, and an intermediate segment arranged between the first segment and the second segment; The first segment comprises a plurality of first contacts, the second segment comprises a plurality of second contacts, the first contacts and the second contacts are electrically connected by a plurality of guide wires, and the intermediate segment comprises an outer sleeve tube, and the guide wires extend through the outer sleeve tube; The implantable lead further comprises an insulating member, an outer circumferential surface of the insulating member is provided with a groove, the guide wires are located in the groove, and the insulating member is arranged in the outer sleeve tube.

2. The implantable lead of claim 1, wherein, The insulating member is made of an elastic material.

3. The implantable lead of claim 2, wherein the first and second electrodes are configured to deliver electrical stimulation to the patient's heart. The elastic material is a high polymer material.

4. The implantable lead of claim 1, wherein, Adjacent grooves are provided with a partition, and the partition is used to separate adjacent guide wires from each other.

5. The implantable lead of claim 1, wherein, The number of insulating members is one or more, when the number of insulating members is one, the insulating member is a whole structure, and when the number of insulating members is more than one, the plurality of insulating members are in a segmented structure.

6. The implantable lead of claim 1, wherein, The insulating member comprises a first insulating part arranged in the intermediate segment and a second insulating part, a part of the second insulating part is arranged in the first segment, and the remaining part of the second insulating part is arranged at one end of the intermediate segment close to the first segment, and the hardness of the second insulating part is greater than that of the first insulating part.

7. The implantable lead of claim 6, wherein the distal electrode is configured to be positioned in the right atrium of the heart. The insulating member is a hollow structure or a solid structure.

8. The implantable lead of claim 1, wherein, A plurality of guide wires are spirally wound along the axial direction of the implantable lead, the grooves are in a spiral structure along the axial direction of the implantable lead, and the guide wires and the grooves are one-to-one corresponding.

9. The implantable lead of claim 1, wherein, The guide wires and the insulating member are integrally formed, or the guide wires and the insulating member are in a split structure.

10. The implantable lead of claim 1, wherein, The guide wires, the insulating member, and the outer sleeve tube are integrally formed.

11. A neural stimulation system, comprising: The implantable lead comprises: a stimulator; The implantable lead according to any one of claims 1 to 10 is one or both of an electrode lead and an extension lead; When the implantable lead is an electrode lead, one end of the electrode lead is implanted into the body of a patient, and the other end of the electrode lead is electrically connected to the stimulator; When one of the implantable leads is an electrode lead and the other is an extension lead, the second segment of the electrode lead is implanted into the body of a patient, the first segment of the electrode lead is electrically connected to the second segment of the extension lead, and the first segment of the extension lead is electrically connected to the stimulator, so that the stimulator is electrically connected to the electrode lead through the extension lead.

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