Electrode lead and nerve stimulation system

Abstract

The utility model discloses an electrode lead and a nerve stimulation system, the electrode lead comprises a stimulation section, a connection section and a middle section, a connection contact of the connection section is electrically connected with a stimulation contact of the stimulation section through a plurality of guide wires, the middle section comprises an outer sleeve, and the guide wires are arranged in the outer sleeve. Wherein the connecting section further comprises a plurality of isolating rings, each isolating ring comprises a body part and step parts arranged at the two ends of the body part, the body parts and the connecting contacts are distributed at intervals, so that the adjacent connecting contacts are insulated from each other, and the step parts are attached to the inner surfaces of the connecting contacts. According to the electrode wire, the structural strength of the connecting section can be improved, other functional modules can be conveniently inserted, the operation difficulty of a user is reduced, the guide wire cannot be damaged, and the stability and safety of the performance of the electrode wire are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to implantable medical device technical field especially, it relates to a kind of electrode lead wire and nerve stimulation system. BACKGROUND

[0002] Electrode lead wire is widely used in medical field, especially in nerve stimulation, deep brain stimulation, cardiac pacing, electrical stimulation therapy etc.. Electrode lead wire is an important component of nerve stimulation system, one end of electrode lead wire is implanted in the affected part of patient, the other end of electrode lead wire is usually electrically connected with other functional modules, other functional modules provide stimulation signal for electrode lead wire, other functional modules are stimulator or extension lead wire for example, two ends of extension lead wire are electrically connected with electrode lead wire and stimulator respectively, other functional modules carry out electrical stimulation to the affected part of patient through electrode lead wire.

[0003] In prior art, electrode lead wire includes stimulation section and connecting section, stimulation contact of stimulation section and connecting contact of connecting section are electrically connected by guide wire, stimulation section is implanted in the affected part of patient, connecting section is connected with other functional modules. When electrode lead wire is connected with other functional modules, certain force needs to be applied to electrode lead wire to insert electrode lead wire into other functional modules. Since electrode lead wire needs to be implanted in human body, electrode lead wire is very thin and soft, and connecting contact of connecting section and isolation ring are independently arranged between each other, without enough supporting force, which leads to that electrode lead wire cannot be inserted into other functional modules. In order to improve the supporting force of electrode lead wire, metal tube is arranged in electrode lead wire, but since electrode lead wire will be bent in the process of use, end of metal tube will cause damage to guide wire, so that guide wire is short-circuited or open-circuited.

[0004] Therefore, existing electrode lead wire needs to be improved. SUMMARY

[0005] The utility model aims at providing a kind of electrode lead wire and nerve stimulation system, not only can improve the structural strength of connecting section, be convenient for insertion other functional modules, so as to reduce the operation difficulty of user, and will not cause damage to guide wire, ensure the stability and safety of electrode lead wire performance.

[0006] The utility model discloses the purpose using following technical scheme realizes:

[0007] A kind of electrode lead wire, including the stimulation section for providing electrical stimulation, the connecting segment electrically connected with other functional modules and the intermediate section connecting the stimulation section and the connecting segment, the stimulation section includes several stimulation contacts, the connecting segment includes several connecting contacts, the connecting contact and the stimulation contact are electrically connected by several guide wires, the intermediate section includes outer sleeve tube, the guide wire is in the outer sleeve tube;

[0008] The connecting section further comprises a plurality of isolation rings, the isolation ring comprises a body part and a step part arranged at both ends of the body part, the body part is spaced apart from the connecting contact to insulate adjacent connecting contacts, and the step part is arranged in close contact with the inner surface of the connecting contact.

[0009] Preferably, the plurality of isolation rings are independently arranged relative to each other; or,

[0010] The plurality of isolation rings are integrally formed, adjacent body parts are connected through the step part, and the connecting contact is sleeved on the step part.

[0011] Preferably, at least one end of the body part is provided with one or more step parts;

[0012] The outer diameter of the body part is greater than the outer diameter of the step part, and the body part and the step part are coaxially arranged.

[0013] Preferably, when the step part is in the form of a ring, a first notch is provided on the step part for the guide wire to pass through, and a second notch is provided on the connecting contact for the guide wire to pass through.

[0014] Preferably, one end of the intermediate section close to the connecting section is a transition section, the transition section and the connecting section jointly form a hardened section, the hardened section comprises a support part, and the material of the support part is a non-metal material; and / or,

[0015] The hardened section further comprises a filler, the material of the filler is an insulating material, and the isolation ring is independently formed or integrally formed with the filler;

[0016] When the filler is located in the connecting section, at least part of the filler is located between the connecting contact and the support part;

[0017] When the filler is located in the transition section, at least part of the filler is located between the outer sleeve and the support part;

[0018] When the isolation ring is integrally formed with the filler, the filler is formed with the body part and the step part arranged at both ends of the body part, adjacent body parts are connected through the step part, and the connecting contact is sleeved on the step part.

[0019] Preferably, along the axial direction of the electrode lead wire, the length of the support part located in the intermediate section is greater than the length of the filler located in the intermediate section.

[0020] Preferably, the intermediate section further comprises an inner liner tube, the inner liner tube is sleeved on the guide wire and located in the outer sleeve tube, and the filler is located between the outer sleeve tube and the inner liner tube.

[0021] Preferably, the connecting section further comprises a locking ring, the locking ring is arranged at one end of the connecting section close to the intermediate section.

[0022] The support part is made of an elastic material, and the elastic material is a polymer material.

[0023] A nerve stimulation system comprises:

[0024] A stimulator;

[0025] The electrode lead wire is implanted into a patient at one end and is electrically connected to the stimulator at the other end.

[0026] Preferably, the nerve stimulation system further comprises:

[0027] An extension lead wire, the stimulator is electrically connected to the electrode lead wire through the extension lead wire.

[0028] Compared with the prior art, the electrode lead wire and the nerve stimulation system have the beneficial effects at least including:

[0029] The electrode lead wire and the nerve stimulation system have the beneficial effects at least including: BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a three-dimensional structural schematic diagram of the electrode lead wire of the utility model embodiment.

[0031] Figure 2 is Figure 1 is a local enlarged schematic diagram of the middle A.

[0032] Figure 3 is an exploded schematic diagram of the electrode lead wire of the utility model embodiment.

[0033] Figure 4 is Figure 3 is a local enlarged schematic diagram of the middle B.

[0034] Figure 5 is a planar structural schematic diagram of the electrode lead wire of the utility model embodiment.

[0035] Figure 6 is a sectional view along Figure 5 A-A line in the figure.

[0036] Figure 7 is a sectional view along Figure 6 C in the figure.

[0037] Figure 8 is a sectional view along Figure 6 D in the figure.

[0038] Figure 9 is a schematic diagram of a first isolation ring in the embodiment of the utility model.

[0039] Figure 10 is a schematic diagram of a second isolation ring in the embodiment of the utility model.

[0040] Figure 11 is a schematic diagram of a third isolation ring in the embodiment of the utility model.

[0041] Figure 12 is a schematic diagram of a connecting contact and an isolation ring in the embodiment of the utility model.

[0042] Figure 13 is a sectional view along Figure 12 B-B line in the figure when adjacent isolation rings are independently arranged in the embodiment of the utility model.

[0043] Figure 14 is a sectional view along Figure 12 B-B line in the figure when adjacent isolation rings are integrally formed in the embodiment of the utility model.

[0044] In the figure: 100, electrode lead wire; 1, stimulation section; 11, stimulation contact; 12, plug; 2, connecting section; 21, connecting contact; 211, second notch; 22, isolation ring; 221, body part; 222, step part; 223, first notch; 23, locking ring; 3, intermediate section; 31, outer sleeve; 32, inner liner; 33, transition section; 34, lead wire section; 4, guide wire; 41, helical hole; 5, hardening section; 51, support part; 52, filler. DETAILED DESCRIPTION

[0045] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and fully convey the inventive aspects to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and descriptions of the same elements will not be repeated.

[0046] The words expressing position and direction described in the utility model are all explained by taking the drawings as examples, but changes can also be made according to needs, and the changes made are all included in the protection scope of the utility model.

[0047] With reference to Figures 1 to 14 The utility model provides a kind of electrode lead wire 100, including the stimulation section 1 for providing electric stimulation to the affected part of patient, connecting section 2 and the intermediate section 3 of connecting stimulation section 1 and connecting section 2.Stimulation section 1 and connecting section 2 can be electrically connected with other functional modules, which can include stimulator (not shown), and connecting section 2 can be inserted into the stimulator to electrically connect the connecting contact 21 of connecting section 2 with the stimulator.In some embodiments, other functional modules can also include extension lead (not shown), and connecting section 2 can be electrically connected with the stimulator through extension lead, and connecting section 2 can be inserted into extension lead to electrically connect the connecting contact 21 of connecting section 2 with extension lead.

[0048] With reference to Figure 1 Stimulation section 1 and connecting section 2 can be respectively arranged at both ends of intermediate section 3, and intermediate section 3 serves to connect stimulation section 1 and connecting section 2.Intermediate section 3 is used to transmit the stimulation signal of connecting section 2 to stimulation section 1, and stimulation section 1 performs electric stimulation on the affected part of patient.In the case that the length of stimulation section 1 is constant, the length of intermediate section 3 determines the overall length of electrode lead wire 100, so as to ensure that stimulation section 1 can be implanted into patient's body at a deep enough position.

[0049] Specifically, with reference to Figure 1 Stimulation section 1 can include a plurality of stimulation contacts 11, i.e., stimulation section 1 is provided with one or more stimulation contacts 11.Stimulation contacts 11 are exposed to the outer surface of stimulation section 1 to ensure that stimulation contacts 11 can have good contact with the affected part of patient, so as to ensure that stimulation contacts 11 can perform electric stimulation on the affected part of patient.Stimulation contacts 11 of stimulation section 1 can be in one or more of sheet shape or ring shape, which can be set according to actual needs.

[0050] As a preferred mode, with reference to Figure 1 Stimulation section 1 can also include plug 12, which can be arranged at one end of stimulation section 1 away from intermediate section 3, and the end of plug 12 facing patient is a smooth end face, such as a semispherical convex head.Plug 12 not only has plugging effect on stimulation section 1 to prevent tissue fluid of patient from entering the inside of stimulation section 1, but also can reduce damage to human tissue when implanting electrode lead wire 100.

[0051] With reference to Figure 1 , Figure 2The connecting section 2 can include a plurality of connecting contacts 21, i.e., the connecting section 2 is provided with one or more connecting contacts 21. In the embodiment, the connecting section 2 can be provided with a plurality of connecting contacts 21, and the stimulator can provide a plurality of stimulation signals through the plurality of connecting contacts 21. The plurality of connecting contacts 21 are arranged at intervals to avoid mutual interference between the connecting contacts 21, so that mutual interference between the stimulation signals of the stimulator can be avoided. The connecting contacts 21 of the connecting section 2 can be one or more of a sheet shape or a ring shape, which can be arranged as needed. In the embodiment, the connecting contacts 21 of the connecting section 2 are in a ring shape.

[0052] As an example, referring to Figure 3 , Figure 4 , Figure 6 The connecting contacts 21 and the stimulation contacts 11 can be electrically connected by a plurality of guide wires 4. The plurality of guide wires 4 are spirally wound along the axial direction of the electrode lead 100 and formed with a spiral hole 41. In this way, the tensile property and bending strength of the electrode lead 100 can be increased, and the implantation of the electrode lead 100 can be ensured to be smooth, and the breakage of the electrode lead 100 can be avoided. When the connecting contacts 21 are in a ring shape, the connecting contacts 21 can be sleeved outside the spiral guide wire 4. The number of connecting contacts 21, the number of stimulation contacts 11, and the number of guide wires 4 are preferably the same, and the connecting contacts 21, the stimulation contacts 11, and the guide wires 4 are arranged one by one, i.e., one end of one guide wire 4 is connected to one connecting contact 21 and the other end is connected to one stimulation contact 11.

[0053] Referring to Figure 3 The intermediate section 3 can include an outer sleeve 31, and the guide wire 4 is in the outer sleeve 31. The outer sleeve 31 can be in a hollow cylindrical shape as a whole. The outer sleeve 31 is in direct contact with the patient, and the guide wire 4 is protected from physical and chemical damage. The material of the outer sleeve 31 is a high polymer material, such as medical-grade silicone, polyurethane, PET, PTFE, FEP, or TPE, etc. to ensure that the outer sleeve 31 has sufficient strength while maintaining a certain flexibility to adapt to the stretching, compression, and other stresses in the implant environment. The outer sleeve also has biocompatibility to ensure that it will not cause an immune response or other adverse reactions when in contact with the patient.

[0054] As a preferred mode, referring to Figure 4 The end of the intermediate section 3 close to the connecting section 2 is a transition section 33, and the transition section 33 and the connecting section 2 jointly form a hardened section 5. The hardened section 5 can include a support part 51, which can be arranged in the spiral hole 41, i.e., the support part 51 is arranged in the transition section 33 and the connecting section 2 at the same time, and the material of the support part 51 is a non-metal material. The support part 51 has a supporting effect on the spiral guide wire 4, thereby improving the structural strength of the hardened section 5.

[0055] As a preferred mode, the support part 51 is made of an elastic material, which can be a polymer material, and the polymer material can be PEEK (polyether ether ketone) material. In this way, the support part 51 has a certain hardness to provide sufficient support for the stiffening section 5, and has a certain flexibility to not cause damage to the guide wire 4. As an example, the support part 51 can have a hollow cylindrical shape as a whole, and the wall thickness of the support part 51 is 0.05 mm, so that the support part 51 is not easy to break in the case of bending. More preferably, the elastic modulus of the support part 51 ranges from 2.5 to 4.5 GPa.

[0056] wherein, with reference to Figure 3 、 Figure 4 , the connecting section 2 can further include a plurality of isolation rings 22, that is, the connecting section 2 is provided with one or more isolation rings 22, and in this embodiment, the number of isolation rings 22 is multiple. With reference to Figure 9 、 Figure 10 、 Figure 11 , the isolation ring 22 is made of an insulating material, and the isolation ring 22 can include a body part 221 and a stepped part 222 provided at both ends of the body part 221, and the stepped part 222 can extend along the axial direction of the isolation ring 22. The body part 221 can be distributed at intervals from the connecting contacts 21, so that the adjacent connecting contacts 21 are arranged to be insulated from each other. With reference to Figure 13 、 Figure 14 , the stepped part 222 can be arranged to abut against the inner surface of the connecting contacts 21, and the body part 221 and the stepped part 222 are preferably coaxially arranged, and the stepped part 222 not only can position the isolation ring 22 and the connecting contacts 21 to form coaxial arrangement of the isolation ring 22 and the connecting contacts 21, thereby improving the position accuracy of the connecting contacts 21, but also can connect the isolation ring 22 and the connecting contacts 21 together, and the stepped part 222 has a supporting effect on the connecting contacts 21, which can further enhance the structural strength of the connecting section 2, so that when the connecting section 2 is subjected to external force, the deformation of the connecting section 2 can be prevented, thereby further facilitating the insertion of the connecting section 2 into other functional modules. In addition, when assembling the isolation ring 22 and the connecting contacts 21, the stepped part 222 can connect the isolation ring 22 and the connecting contacts 21 together, which facilitates the assembly of the isolation ring 22 and the connecting contacts 21, and improves the assembly efficiency of the isolation ring 22 and the connecting contacts 21.

[0057] As a preferred mode, with reference to Figure 3 、 Figure 4, the connecting section 2 can further comprise a locking ring 23 arranged at one end of the connecting section 2 close to the intermediate section 3. In use, when the electrode lead wire 100 is inserted into other functional modules, the screw on the functional module can also press against the locking ring 23 to fix the electrode lead wire 100 and the functional module together. The locking ring 23 is made of a material with high structural strength, and the material of the locking ring 23 is preferably a metal material, so as to ensure that the locking ring 23 has sufficient structural strength. An isolation ring 22 can be arranged between the locking ring 23 and the connecting contact 21, which can ensure that the locking ring 23 and the connecting contact 21 are insulated.

[0058] In the present application, by arranging the step portion 222 and the inner surface of the connecting contact 21 to abut against each other, the step portion 222 not only positions the isolation ring 22 and the connecting contact 21 to form coaxial arrangement, thereby improving the position accuracy of the connecting contact 21, but also connects the isolation ring 22 and the connecting contact 21 together, thereby enhancing the structural strength of the connecting section 2, facilitating the insertion of the connecting section 2 into other functional modules. In assembling the isolation ring 22 and the connecting contact 21, the step portion 222 can connect the isolation ring 22 and the connecting contact 21 together, which facilitates the assembly of the isolation ring 22 and the connecting contact 21 and improves the assembly efficiency of the isolation ring 22 and the connecting contact 21.

[0059] The hardening section 5 comprises the connecting section 2 and the transition section 33. By arranging the support portion 51 on the hardening section 5, the user can hold the transition section 33 and insert the connecting section 2 into other functional modules when the electrode lead wire 100 is inserted into other functional modules. Since the support portion 51 can enhance the structural strength of the hardening section 5, the connecting section 2 and the transition section 33 both have sufficient support force, which not only facilitates the user to hold the transition section 33, but also facilitates the insertion of the connecting section 2 into other functional modules, thereby reducing the operation difficulty of the user. When the electrode lead wire 100 is bent during use, the tip of the support portion 51 presses against the guide wire 4. The tip of the support portion 51 made of metal material is hard and sharp, which can damage the guide wire 4 and cause short circuit or open circuit of the guide wire 4. By arranging the support portion 51 made of a non-metal material, the tip of the support portion 51 made of a non-metal material is soft and has low hardness, which can reduce the damage of the support portion 51 to the guide wire 4 and avoid abrasion of the insulating layer on the surface of the guide wire 4 and breakage of the guide wire 4, thereby avoiding short circuit between adjacent guide wires 4 and breakage of the guide wire 4, ensuring the stability and safety of the performance of the electrode lead wire 100, thereby improving the treatment effect on the patient and avoiding damage to the patient, and prolonging the service life of the electrode lead wire 100.

[0060] In a specific embodiment, referring to Figure 9 , Figure 10、 Figure 11 The plurality of isolation rings 22 can be independently arranged relative to each other, or the plurality of isolation rings 22 can be integrally formed.

[0061] Referring to Figure 9 、 Figure 10 When the plurality of isolation rings 22 are independently arranged relative to each other, the stepped portions 222 on adjacent isolation rings 22 are also independently arranged relative to each other, i.e. the stepped portions 222 on adjacent isolation rings 22 are independently arranged relative to each other.

[0062] Referring to Figure 11 When the plurality of isolation rings 22 are integrally formed, the stepped portions 222 on adjacent isolation rings 22 are integrally formed, and the stepped portions 222 can serve as mounting positions of the connection contacts 21. The structure strength of the integrally formed isolation rings 22 is greater, thereby further enhancing the structure strength of the connection section 2, and the integrally formed isolation rings 22 not only facilitate assembly of the connection contacts 21, but also further improve the accuracy of the positions of the connection contacts 21. Figure 14 At least one end of the body portion 221 can be provided with one or more stepped portions 222. When one end of the body portion 221 is provided with one stepped portion 222, the stepped portion 222 can be one of a circular ring shape, a portion of a circular ring, or a special shape.

[0063] When the stepped portion 222 is in the form of a circular ring, the stepped portion 222 is provided with a first gap 223 for the guide wire 4 to pass through, and the connection contact 21 is provided with a second gap 211 for the guide wire 4 to pass through. Figure 4 Referring to

[0064] When one end of the body portion 221 is provided with a plurality of stepped portions 222, the stepped portions 222 can be one or more of a portion of a circular ring or a special shape, and gaps can be provided between adjacent stepped portions 222. Figure 9 Figure 10 、 Figure 11 When one end of the body portion 221 is provided with a plurality of stepped portions 222, the stepped portions 222 can be one or more of a portion of a circular ring or a special shape, and gaps can be provided between adjacent stepped portions 222.

[0065] As an example, referring to Figure 10 When the stepped portion 222 is in the form of a special shape, the width of the end of the stepped portion 222 away from the body portion 221 is less than the width of the end of the stepped portion 222 close to the body portion 221, e.g. the gaps between the ends of adjacent stepped portions 222 away from the body portion 221 are greater than the gaps between the ends of adjacent stepped portions 222 close to the body portion 221, so that when the connection contact 21 is mounted on the stepped portion 222, the end of the stepped portion 222 away from the body portion 221 is more easily deformed, facilitating mounting of the connection contact 21, and the end of the stepped portion 222 close to the body portion 221 has sufficient structure strength, ensuring the stability of the position of the connection contact 21.​

[0066] When the plurality of stepped portions 222 are arranged at one end of the body portion 221, the plurality of stepped portions 222 are evenly distributed along the circumference of the body portion 221, and the abutting force between each stepped portion 222 and the connecting contact 21 is the same or approximately the same when the connecting contact 21 is installed on the stepped portion 222, so that the isolation ring 22 and the connecting contact 21 can be coaxially arranged.

[0067] As an example, refer to Figure 13 When the plurality of isolation rings 22 are independently arranged relative to each other, the plurality of stepped portions 222 are arranged at one end of the body portion 221, and the outer diameter of the stepped portion 222 can be greater than the inner diameter of the connecting contact 21. When the connecting contact 21 is installed on the stepped portion 222, the isolation ring 22 has a certain elasticity, and a gap is arranged between adjacent stepped portions 222. The gap can make the plurality of stepped portions 222 more easily deformed, so that the connecting contact 21 is installed on the stepped portion 222. After the connecting contact 21 is installed on the stepped portion 222, the stepped portion 222 can be tightly arranged with the connecting contact 21, that is, the isolation ring 22 and the connecting contact 21 are connected, thereby enhancing the structural strength of the connecting section 2. In addition, the gap between the adjacent stepped portions 222 can also increase the contact surface between the stepped portion 222 and the filler 52, thereby improving the bonding force between the stepped portion 222 and the filler 52.

[0068] More preferably, the outer diameter of the end of the stepped portion 222 away from the body portion 221 can be less than or equal to the inner diameter of the connecting contact 21, so that the connecting contact 21 is installed on the stepped portion 222. The outer diameter of the end of the stepped portion 222 close to the body portion 221 is greater than the inner diameter of the connecting contact 21, so that the stepped portion 222 can be tightly arranged with the connecting contact 21.

[0069] Refer to Figure 9 , Figure 10 , Figure 11 The outer diameter of the body portion 221 is preferably greater than the outer diameter of the stepped portion 222, and the connecting contact 21 is arranged on the stepped portion 222 between the body portion 221, so that the height difference between the outer surface of the connecting contact 21 and the outer surface of the body portion 221 can be reduced, the smoothness of the surface of the connecting section 2 is improved, and the connecting section 2 is inserted into other functional modules.

[0070] More preferably, the difference between the outer diameter of the body portion 221 and the outer diameter of the stepped portion 222 is approximately equal to twice the wall thickness of the connecting contact 21. When the connecting contact 21 is arranged on the stepped portion 222, the outer surface of the connecting contact 21 can be flush or approximately flush with the outer surface of the body portion 221, so that the outer surface of the connecting section 2 is smooth, and the connecting section 2 is inserted into other functional modules.

[0071] As a preferred mode, refer toFigure 3 、 Figure 4 、 Figure 7 、 Figure 8 The hardening section 5 can further include a filler 52, which is made of an insulating material such as polyurethane or epoxy resin. The filler 52 can be in a liquid state before being arranged in the hardening section 5, so as to facilitate the filling of the filler 52 into the hardening section 5 and ensure the uniformity of the distribution of the filler 52 in the hardening section 5. The filler 52 can be in a solid state after being arranged in the hardening section 5, and can be changed from a liquid state to a solid state by a certain physical or chemical method. The filler 52 in a solid state can support and strengthen the hardening section 5 of the electrode lead 100. The isolation ring 22 and the filler 52 can be independently formed, and the isolation ring 22 can be integrally formed with the filler 52.

[0072] With reference to Figure 8 When the filler 52 is located in the connecting section 2, at least part of the filler 52 can be located between the connecting contact 21 and the support portion 51. The filler 52 can fill the gap between the connecting contact 21, the isolation ring 22 and the support portion 51. The filler 52 itself has a certain structural strength, which can further enhance the structural strength of the connecting section 2. In addition, the filler 52 can connect the connecting contact 21, the isolation ring 22 and the support portion 51 into one body. Especially when a plurality of isolation rings 22 are independently arranged, the filler 52 can connect a plurality of connecting contacts 21 and a plurality of isolation rings 22 into one body, which can further enhance the structural strength of the connecting section 2 and facilitate the insertion of the connecting section 2 into other functional modules, thereby reducing the operation difficulty of the user. At the same time, the filler 52 can also fix the guide wire 4, prevent the guide wire 4 from being separated from the connecting contact 21 due to the deformation of the electrode lead 100, and ensure the stability of the electrical connection between the guide wire 4 and the connecting contact 21.

[0073] With reference to Figure 7 When the filler 52 is located in the transition section 33, at least part of the filler 52 can be located between the outer sleeve 31 and the support portion 51. The filler 52 can fill the gap between the outer sleeve 31 and the support portion 51, which can further enhance the structural strength of the transition section 33 and facilitate the user to hold the transition section 33, thereby reducing the operation difficulty of the user.

[0074] When the isolation ring 22 can be integrally formed with the filler 52, the filler 52 can be formed with a body portion 221 and a stepped portion 222 arranged at both ends of the body portion 221. Adjacent body portions 221 are connected by the stepped portion 222, and the connecting contact 11 can be sleeved on the stepped portion 222.

[0075] That is, in the present embodiment, the isolation ring 22 is not provided separately, but is replaced by the filler 52. The filler 52 in the present embodiment not only fills the gap between the connecting contact 21 and the support 51, but also part of the filler 52 can be located between adjacent connecting contacts 21, thereby ensuring that the adjacent connecting contacts 21 are insulated from each other. As an example, the connecting contacts 21 and the support 51 can be fixed by a jig (not shown), then the filler 52 in liquid state is poured into the gap between the jig, the connecting contacts 21 and the support 51, and finally the filler 52 is changed from liquid state to solid state by certain physical or chemical method.

[0076] With reference to Figure 3 , Figure 4 , Figure 7 The intermediate section 3 can further include an inner liner tube 32, which can be a hollow cylinder as a whole. The inner liner tube 32 is sleeved on the guide wire 4 and located in the outer sleeve tube 31. The inner liner tube 32 not only has a protective effect on the guide wire 4, but also facilitates the insertion of the guide wire 4 into the outer sleeve tube 31 together. The filler 52 can be located between the outer sleeve tube 31 and the inner liner tube 32, i.e. the filler 52 can fill the gap between the outer sleeve tube 31 and the inner liner tube 32 in the transition section 33. The filler 52 can fill the gap between the outer sleeve tube 31 and the inner liner tube 32. In this way, the structural strength of the transition section 33 can be further enhanced, the user can hold the transition section 33 more easily, and the operation difficulty of the user can be reduced

[0077] As a preferred mode, with reference to Figure 6The length of the support part 51 located in the middle section 3 is greater than the length of the filler 52 located in the middle section 3, that is, the length of the support part 51 located in the transition section 33 is greater than the length of the filler 52 located in the transition section 33. The middle section 3 is away from the wire section 34 of the connecting section 2, that is, the middle section 3 includes the wire section 34 and the transition section 33, the wire section 34 is not provided with the support part 51 and the filler 52, and the wire section 34 is relatively soft, facilitating the electrode lead wire 100 to be implanted into the body of the patient. The transition section 33 is provided with the support part 51 and the filler 52 at the same time, which can ensure that the transition section 33 has sufficient structural strength, facilitating the user to hold, and the structural strength of the part of the transition section 33 provided with the support part 51 and the filler 52 at the same time is greater than the structural strength of the part of the transition section 33 provided with only the support part 51, so that the structural strength of the end of the transition section 33 close to the connecting section 2 is greater than the structural strength of the end of the transition section 33 close to the wire section 34, and the structural strength of the end of the transition section 33 away from the connecting section 2 is greater than the structural strength of the wire section 34, that is, the structural strength of the middle section 3 gradually decreases in the direction from the connecting section 2 to the stimulation section 1, so that the transition of the structural strength of the middle section 3 is more natural, when the electrode lead wire 100 is bent in the process of use, the bending degree of the joint of the transition section 33 and the wire section 34 can be reduced, which not only can prevent the middle section 3 from being broken, but also can reduce the pressing force between the distal end of the support part 51 and the guide wire 4, so that the damage of the support part 51 to the guide wire 4 can be reduced, the abrasion of the insulating layer on the surface of the guide wire 4 and the breakage of the guide wire 4 can be avoided, so that the short circuit between adjacent guide wires 4 and the open circuit of the guide wire 4 can be avoided, thereby ensuring the stability and safety of the performance of the electrode lead wire 100, and further improving the treatment effect on the patient and avoiding damage to the patient, and at the same time, the service life of the electrode lead wire 100 can be prolonged.

[0078] The application also provides a nerve stimulation system, which can include a stimulator and the electrode lead wire 100 described above, one end of the electrode lead wire 100 can be implanted into the body of the patient, at least part of the stimulation section 1 of the electrode lead wire 100 can be implanted into the body of the patient, the other end of the electrode lead wire 100 can be electrically connected with the stimulator, and the connecting section 2 of the electrode lead wire 100 can be electrically connected with the stimulator. In use, the user holds the transition section 33 to insert the connecting section 2 into the stimulator. The stimulator can be a pulse generator, which transmits a stimulation signal to the affected part of the patient through the electrode lead wire 100, and the stimulation contact 11 of the stimulation section 1 performs electrical stimulation on the affected part of the patient.

[0079] The nerve stimulation system can further comprise an extension lead (not shown), and the electrode lead 100 can be electrically connected with the stimulator through the extension lead. One end of the extension lead can be electrically connected with the connecting contact 21 of the connecting section 2 of the electrode lead 100, and in use, the user holds the transition section 33 to insert the connecting section 2 into one end of the extension lead. The other end of the extension lead can be electrically connected with the stimulator, and the extension lead can transmit the stimulation signal of the stimulator to the connecting contact 21 of the connecting section 2, and the connecting contact 21 of the connecting section 2 transmits the stimulation signal through the filter to the stimulation contact 11 of the stimulation section 1 through the first transmission line, and the stimulation contact 11 of the stimulation section 1 performs electrical stimulation on the affected part of the patient.

[0080] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as the limitation of the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model without departing from the principles and purposes of the utility model, and all these changes should belong to the protection scope of the utility model claim.

Claims

1. An electrode lead, characterized by, The electrode lead wire comprises a stimulation section for providing electrical stimulation, a connecting section, and an intermediate section connecting the stimulation section and the connecting section, the stimulation section comprises a plurality of stimulation contacts, the connecting section comprises a plurality of connecting contacts, the connecting contacts and the stimulation contacts are electrically connected by a plurality of guide wires, and the intermediate section comprises an outer sleeve tube, and the guide wires are located in the outer sleeve tube; The connecting section further comprises a plurality of isolation rings, the isolation ring comprises a body part and a step part arranged at both ends of the body part, the body part is distributed between the connecting contacts to insulate adjacent connecting contacts from each other, and the step part is arranged in close contact with the inner surface of the connecting contact.

2. The electrode lead of claim 1, wherein A plurality of isolation rings are independently arranged between each other; or, A plurality of isolation rings are integrally formed, and adjacent body parts are connected by the step part, and the connecting contact is sleeved on the step part.

3. The electrode lead of claim 1, wherein, At least one end of the body part is provided with one or more step parts; The outer diameter of the body part is greater than the outer diameter of the step part, and the body part and the step part are coaxially arranged.

4. The electrode lead of claim 1, wherein, When the step part is in the form of a circular ring, a first notch is arranged on the step part for the guide wire to pass through, and a second notch is arranged on the connecting contact for the guide wire to pass through.

5. The electrode lead of claim 1, wherein, The end of the intermediate section close to the connecting section is a transition section, the transition section and the connecting section jointly form a hardened section, the hardened section comprises a support part, and the material of the support part is a non-metal material; and / or, The hardened section further comprises a filler, the material of the filler is an insulating material, the isolation ring is independently formed with the filler or the isolation ring is integrally formed with the filler; When the filler is located in the connecting section, at least part of the filler is located between the connecting contact and the support part; When the filler is located in the transition section, at least part of the filler is located between the outer sleeve tube and the support part; When the isolation ring is integrally formed with the filler, the filler is formed with the body part and the step part arranged at both ends of the body part, adjacent body parts are connected by the step part, and the connecting contact is sleeved on the step part.

6. The electrode lead of claim 5, wherein, Along the axial direction of the electrode lead wire, the length of the support part in the intermediate section is greater than the length of the filler in the intermediate section.

7. The electrode lead of claim 5, wherein, The intermediate section further comprises an inner lining tube, the inner lining tube is sleeved on the guide wire and located in the outer sleeve tube, and the filler is located between the outer sleeve tube and the inner lining tube.

8. The electrode lead of claim 5, wherein, The connecting section further comprises a locking ring, and the locking ring is arranged at the end of the connecting section close to the intermediate section; The support part is made of an elastic material, and the elastic material is a high polymer material.

9. A neural stimulation system, comprising: It comprises: a stimulator; The electrode lead wire according to any one of claims 1 to 8, one end of the electrode lead wire is implanted into the body of a patient, and the other end of the electrode lead wire is electrically connected with the stimulator.

10. The neurostimulation system of claim 9, wherein, The neural stimulation system further comprises: an extension lead wire, and the stimulator is electrically connected with the electrode lead wire through the extension lead wire.

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