Implantable electrode lead and nerve stimulation system

Abstract

The utility model discloses an implantable electrode lead and a nerve stimulation system, comprising a stimulation section used for providing electrical stimulation, a connection section electrically connected with a stimulator, and a middle section connecting the stimulation section and the connection section, the middle section comprises at least one strand of stranded wire, the stranded wire comprises at least one section of first spiral part and at least one section of second spiral part, the first spiral part and the second spiral part are connected through a transition part. Wherein the stranded wires of the first spiral part are spirally wound in a first spiral direction, the stranded wires of the second spiral part are spirally wound in a second spiral direction, and the first spiral direction is opposite to the second spiral direction. According to the implantable electrode wire, induced electromotive force generated in a stimulation loop can be avoided or reduced, nuclear magnetic compatibility is achieved, abnormal heating in a nuclear magnetic environment is avoided, the implantable electrode wire in a working state can be prevented from shifting in the nuclear magnetic environment, and the reliability of the implantable electrode wire is improved. And the reliability of the implantable electrode wire in a nuclear magnetic environment is ensured.

Description

Technical Field

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

[0002] Implantable electrical stimulation devices have wide applications in medicine. They can modulate the function of nerves, muscles, or other tissues through electrical currents or pulses, helping to treat many different types of diseases, especially those of the nervous and motor systems. Implantable electrical stimulation devices alleviate symptoms, improve function, and even restore certain physiological functions by interfering with or modulating abnormal nerve activity.

[0003] In existing technologies, implantable electrical stimulation systems include a pulse generator, an extension lead, and electrode leads. The extension lead connects the pulse generator and the electrode leads, and the pulse generator provides electrical stimulation to the patient through the stimulation electrodes. Because the electrode leads need to be implanted in the patient's body, they require excellent flexibility and tensile strength; therefore, they are typically spirally wound. However, when the spiral electrode leads are exposed to varying MRI environments, they can induce an electromotive force in the stimulation circuit, leading to an abnormally increased output signal from the stimulation electrodes. This can affect the treatment effect and may even cause irreversible damage to the patient due to overheating.

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

[0005] The purpose of this invention is to provide an implantable electrode lead and a nerve stimulation system that can not only avoid or reduce the induced electromotive force in the stimulation circuit, achieving MRI compatibility and improving the treatment effect on patients, but also avoid abnormal heating in the MRI environment that could cause damage to patients. Furthermore, it can prevent the implantable electrode lead from shifting in the MRI environment during operation, ensuring the reliability of the implantable electrode lead in the MRI environment.

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

[0007] An implantable electrode lead includes a stimulation segment for providing electrical stimulation, a connection segment electrically connected to a stimulator, and an intermediate segment connecting the stimulation segment and the connection segment. The intermediate segment includes at least one strand of wire, the strand of wire including at least one first helical portion and at least one second helical portion.

[0008] In this configuration, the stranded wire of the first spiral portion is wound in a spiral shape in a first spiral direction, and the stranded wire of the second spiral portion is wound in a spiral shape in a second spiral direction, wherein the first spiral direction and the second spiral direction are opposite.

[0009] Preferably, the implantable electrode wire further includes a transition portion connecting the first helical portion and the second helical portion.

[0010] Preferably, when the first helical direction is a right-hand helical direction, the second helical direction is a left-hand helical direction; or,

[0011] When the first helical direction is a left-hand helical direction, the second helical direction is a right-hand helical direction.

[0012] Preferably, the number of turns in the first spiral portion is the same as the number of turns in the second spiral portion, or the number of turns in the first spiral portion is different from the number of turns in the second spiral portion.

[0013] Preferably, the inner diameter of the first spiral portion is the same as the inner diameter of the second spiral portion, or the inner diameter of the first spiral portion is different from the inner diameter of the second spiral portion.

[0014] Preferably, the pitch of the first helical portion is the same as the pitch of the second helical portion, or the pitch of the first helical portion is different from the pitch of the second helical portion.

[0015] Preferably, when the number of turns in the first helical portion is greater than the number of turns in the second helical portion, the inner diameter of the first helical portion is smaller than the inner diameter of the second helical portion, so that the induced electromotive force generated by the first helical portion and the induced electromotive force generated by the second helical portion cancel each other out when the implanted electrode wire is in an NMR environment; or,

[0016] When the number of turns of the first spiral section is less than the number of turns of the second spiral section, the inner diameter of the first spiral section is greater than the inner diameter of the second spiral section, so that the induced electromotive force generated by the first spiral section and the induced electromotive force generated by the second spiral section cancel each other out when the implanted electrode wire is in a nuclear magnetic resonance environment.

[0017] Preferably, the transition portion is part of the stranded wire, or the transition portion is a connector.

[0018] Preferably, when the transition portion is part of the stranded wire, the stranded wire of the transition portion extends axially along the implanted electrode lead; and / or,

[0019] When the stranded wire is multi-stranded, the transition section connects the stranded wires of the first spiral section and the stranded wires of the second spiral section one by one.

[0020] Preferably, the stranded wire includes at least one conductor, which is covered with an insulating layer.

[0021] Preferably, the stimulation segment includes at least one stimulation contact, the connection segment includes at least one connection ring, one end of the conductor is electrically connected to the stimulation contact, and the other end of the conductor is electrically connected to the connection ring.

[0022] A neural stimulation system, comprising:

[0023] Stimulator;

[0024] An implantable electrode lead as described in any of the above embodiments, wherein one end of the implantable electrode lead is implanted in the patient's body, and the other end of the implantable electrode lead is electrically connected to the stimulator.

[0025] Preferably, the neural stimulation system further includes:

[0026] An extension lead is provided, through which the stimulator is electrically connected to the implantable electrode lead.

[0027] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0028] This invention relates to an implantable electrode lead and a neurostimulation system. By simultaneously incorporating a first helical section and a second helical section with opposite spiral directions, the induced electromotive force generated by the first helical section and the second helical section can cancel each other out under varying NMR conditions. This avoids or reduces the generation of induced electromotive force in the stimulation circuit, achieving NMR compatibility. This prevents abnormal increases in the output signal of the stimulation electrode, improves the therapeutic effect on the patient, and avoids damage. Furthermore, when the implantable electrode lead is energized, the induced magnetic field generated by the first helical section and the second helical section can also cancel each other out, eliminating the magnetism of the implantable electrode lead. In other words, the implantable electrode lead is non-magnetic. Under varying NMR conditions, this prevents the implantable electrode lead from being attracted by strong magnets, which could cause displacement of the implantation position. This not only reduces the feeling of a foreign body during implantation and avoids damage caused by intrusive procedures, but also ensures the accuracy of the implantation position, thereby improving the precision of treatment and further enhancing the therapeutic effect. Attached Figure Description

[0029] Figure 1 This is a planar structural schematic diagram of the implantable electrode wire from one perspective of an embodiment of the present invention.

[0030] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0031] Figure 3This is a three-dimensional structural diagram of the implantable electrode wire according to an embodiment of the present invention.

[0032] Figure 4 yes Figure 3 A magnified view of a portion of point B in the middle.

[0033] Figure 5 This is a planar structural schematic diagram of the implantable electrode wire from another perspective of an embodiment of this utility model.

[0034] In the diagram: 100, implantable electrode lead; 1, stranded wire; 11, first helical section; 12, second helical section; 13, conductor; 14, insulating layer; 2, transition section; 3, through hole. 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 5 This invention provides an implantable electrode lead 100, which connects a stimulator (not shown) and a stimulating electrode (not shown). The stimulator can be a pulse generator, which transmits a stimulation signal to the stimulating electrode via the implantable electrode lead 100. The stimulating electrode then stimulates the patient's affected area. Since the implantable electrode lead 100 needs to be implanted into the patient's body, it requires excellent flexibility and tensile strength. The implantable electrode lead 100 is typically spirally wound to increase its tensile and bending strength, ensuring smooth implantation and preventing breakage.

[0038] Specifically, refer to Figure 2 , Figure 4The implantable electrode lead 100 may include a stimulation segment (not shown) for providing electrical stimulation, a connection segment (not shown) electrically connected to the stimulator, and an intermediate segment connecting the stimulation segment and the connection segment. The intermediate segment may include at least one strand of wire 1, meaning the implantable electrode lead 100 may include one or more strands of wire 1. Each strand of wire 1 can be used to connect the stimulator and the stimulation electrode. (Refer to...) Figure 4 Each stranded wire 1 may include at least one conductor 13, that is, each stranded wire 1 may include one or more conductors 13. The conductors 13 may be covered with an insulating layer 14. The insulating layer 14 can ensure that the conductors 13 transmit the stimulation signal to the preset position. When there are multiple stranded wires 1, the insulating layer 14 can also prevent adjacent stranded wires 1 from interfering with each other. When the stranded wire 1 includes multiple conductors 13, each conductor 13 can be connected to a stimulation electrode, that is, a single stranded wire 1 can be connected to multiple stimulation electrodes at the same time, which can simultaneously provide electrical stimulation to multiple points of the patient's affected area, and the stimulation intensity can be consistent.

[0039] The stimulation segment may include at least one stimulation contact, and the connection segment may include at least one connection ring, such as a stimulation electrode. One end of the conductor 13 may be electrically connected to the stimulation contact, and the other end of the conductor 13 may be electrically connected to the connection ring.

[0040] As an example, refer to Figure 2 , Figure 4 In this embodiment, the implantable electrode lead 100 may include an eight-strand strand 1, each strand 1 may include a conductor 13, the eight-strand strand 1 may connect to eight stimulation electrodes, the stimulator may stimulate simultaneously through the eight-strand strand 1, or may stimulate through a portion of the strand 1.

[0041] Reference Figure 2 The stranded wire 1 may include at least one first helical portion 11 and at least one second helical portion 12. That is, the stranded wire 1 may include one or more first helical portions 11, and the stranded wire 1 may also include one or more second helical portions 12. The first helical portion 11 and the second helical portion 12 can be directly connected, or they can be connected through a transition portion 2, which can connect the first helical portion 11 and the second helical portion 12 in series. Alternatively, the transition portion 2 can connect adjacent first helical portions 11 in series, and it can also connect adjacent second helical portions 12 in series. Preferably, the stranded wire 1 of the first helical portion 11 and the stranded wire 1 of the second helical portion 12 are of the same type. In this application, the description assumes that the stranded wire 1 of the first helical portion 11 and the stranded wire 1 of the second helical portion 12 are of the same type.

[0042] The number of segments in the first spiral portion 11 and the second spiral portion 12 can be the same, or they can be different, depending on actual needs. In this embodiment, the number of segments in the first spiral portion 11 and the second spiral portion 12 are the same. As an example, the stranded wire 1 includes a first spiral portion 11 and a second spiral portion 12.

[0043] As a preferred embodiment, the transition portion 2 can be part of the stranded wire 1, or it can be a connector. The transition portion 2 can be connected to the first helical portion 11 and / or the second helical portion 12 by means of welding or the like.

[0044] When the transition portion 2 is part of the stranded wire 1, the stranded wire 1 of the transition portion 2 can extend along the axial direction of the implanted electrode wire 100. This not only shortens the length of the transition portion, but also makes the transition portion 2 extend in a straight line, which can prevent the transition portion 2 from generating an induced electromotive force and also prevent the transition portion 2 from generating an induced magnetic field that would cause the transition portion 2 to become magnetic.

[0045] When the stranded wire 1 is multi-stranded, the transition part 2 can connect the stranded wire 1 of the first spiral part 11 and the stranded wire 1 of the second spiral part 12 in a one-to-one correspondence.

[0046] Among them, reference Figure 2 , Figure 5 The implantable electrode lead 100 can be generally cylindrical, and a through hole 3 is formed inside the implantable electrode lead 100, extending along the axial direction of the implantable electrode lead 100. The stranded wire 1 of the first helical portion 11 is wound in a helical shape in a first helical direction, and the stranded wire 1 of the second helical portion 12 is wound in a helical shape in a second helical direction, with the first and second helical directions being opposite. When the first helical direction is a right-hand helical direction, the second helical direction is a left-hand helical direction. When the first helical direction is a left-hand helical direction, the second helical direction is a right-hand helical direction. In this embodiment, the first helical direction is a right-hand helical direction, and the second helical direction is a left-hand helical direction.

[0047] When the implantable electrode lead 100 is in an MRI environment, if the implantable electrode lead 100 is wound in only one helical direction, it will generate an induced electromotive force (EMF). This induced EMF will either enhance or weaken the stimulation signal, thus affecting the treatment effect. For example, when the implantable electrode lead 100 is wound in only a right-hand helical direction, the induced EMF generated by the implantable electrode lead 100 will enhance the stimulation signal; when the implantable electrode lead 100 is wound in only a left-hand helical direction, the induced EMF generated by the implantable electrode lead 100 will weaken the stimulation signal.

[0048] In this application, by simultaneously providing a first spiral portion 11 and a second spiral portion 12 with opposite spiral directions, the first spiral portion 11 can generate an induced electromotive force E1, and the second spiral portion 12 can generate an induced electromotive force E2. According to Lenz's law, since the spiral directions are opposite in a magnetic field environment, the direction of the induced electromotive force E1 generated by the first spiral part 11 is opposite to the direction of the induced electromotive force E2 generated by the second spiral part 12. The induced electromotive force E1 generated by the first spiral part 11 and the induced electromotive force E2 generated by the second spiral part 12 can cancel each other out, which can reduce the induced electromotive force generated by the implanted electrode wire 100. When the magnitudes of the induced electromotive force E1 generated by the first spiral part 11 and the induced electromotive force E2 generated by the second spiral part 12 are equal, the induced electromotive force generated by the first spiral part 11 and the induced electromotive force generated by the second spiral part 12 can completely cancel each other out, that is, the induced electromotive force generated by the implanted electrode wire 100 is zero, which reduces or avoids the influence of the MRI environment on the stimulation circuit. In particular, it can prevent abnormal increases in the output signal of the stimulation electrode, improve the treatment effect on the patient, and avoid damage to the patient. Especially when the patient's brain is electrically stimulated, it can avoid damage to the patient's brain tissue and ensure the safety of the treatment.

[0049] In other words, the implantable electrode lead 100 of this application achieves MRI compatibility without increasing its outer diameter, eliminating the need for additional magnetic shielding components. Compared to using magnetic shielding components, the implantable electrode lead 100 of this application is smaller in size and possesses better flexibility and tensile strength, reducing the feeling of a foreign body during implantation and avoiding damage caused by invasive procedures, thus facilitating implantation into the patient's body. Furthermore, within the same volume, the implantable electrode lead 100 of this application can incorporate more strands 1, allowing connection to more stimulation electrodes, thereby improving the precision of stimulation placement and ultimately enhancing the therapeutic effect.

[0050] Meanwhile, according to Ampere's law (right-hand screw law), when the helical implantable electrode lead 100 is energized, if the implantable electrode lead 100 is wound in only one helical direction, the implantable electrode lead 100 will generate a magnetic field in the same direction as the current, that is, the implantable electrode lead 100 itself will generate magnetism. When the implantable electrode lead 100 is in a nuclear magnetic resonance environment, the implantable electrode lead 100 will be attracted by the strong magnetic field in the nuclear magnetic resonance environment, and the implantation position of the implantable electrode lead 100 will be displaced, thereby affecting the function of the implantable electrode lead 100.

[0051] In this application, by simultaneously providing a first spiral portion 11 and a second spiral portion 12 with opposite spiral directions, when the implantable electrode lead 100 is energized, the direction of the induced magnetic field generated by the first spiral portion 11 is opposite to the direction of the induced magnetic field generated by the second spiral portion 12. The induced magnetic fields generated by the first spiral portion 11 and the second spiral portion 12 can also cancel each other out, thereby reducing or eliminating the magnetism of the implantable electrode lead 100, making the implantable electrode lead 100 less or non-magnetic. When the implantable electrode lead 100 is in a changing NMR environment, it can reduce or avoid the implantation position of the implantable electrode lead 100 being attracted by a strong magnet, which can cause the implantation position of the implantable electrode lead 100 to shift. This not only reduces the feeling of foreign body implantation and avoids damage caused by the intrusion operation of the lead, but also ensures the accuracy of the implantation position of the implantable electrode lead 100, thereby ensuring the accuracy of the stimulation electrode implantation position, improving the precision of treatment, and further improving the treatment effect.

[0052] In one specific embodiment, one or more of the number of turns, inner diameter, and pitch of the first helical portion 11 may be the same as one or more of the number of turns, inner diameter, and pitch of the second helical portion 12, or they may be different. The requirement is that the induced electromotive force E1 generated by the first helical portion 11 is equal in magnitude to the induced electromotive force E2 generated by the second helical portion 12, and that the induced magnetic field generated by the first helical portion 11 and the induced magnetic field generated by the second helical portion 12 completely cancel each other out.

[0053] According to the formula for calculating induced electromotive force, E=N*S*ΔB / Δt, where N is the number of turns of the spiral coil, S is the area of ​​the spiral coil, and ΔB / Δt is the rate of change of the magnetic field. The magnitude of the induced electromotive force E is related to the number of turns of the spiral coil, the rate of change of the magnetic field, and the inner diameter of the spiral coil.

[0054] According to the formula for calculating the induced magnetic field, B = μNI / L, the air permeability μ of the first spiral part 11 and the second spiral part 12 are the same, and the current I is the same. Therefore, by ensuring that the ratio of the number of turns N of the spiral coil to the length L of the spiral coil is the same, it can be ensured that the magnitude of the induced magnetic field is equal and the direction is opposite, and the induced magnetic fields cancel each other out.

[0055] In other words, when the stranded wire 1 includes a first spiral section 11 and a second spiral section 12, the number of turns in the first spiral section 11 and the number of turns in the second spiral section 12 can be the same. When the first spiral section 11 has multiple segments and the second spiral section 12 has multiple segments, the total number of turns in the first spiral section 11 and the total number of turns in the second spiral section 12 can be the same. Alternatively, the number of turns in the first spiral section 11 and the second spiral section 12 can also be different, meaning the total number of turns in the first spiral section 11 and the total number of turns in the second spiral section 12 can also be different.

[0056] The inner diameter of the first helical portion 11 and the inner diameter of the second helical portion 12 can be the same, or they can be different.

[0057] The pitch of the first helical portion 11 and the pitch of the second helical portion 12 can be the same, or the pitch of the first helical portion 11 and the pitch of the second helical portion 12 can be different.

[0058] As an example, when the number of turns of the first spiral portion 11 is greater than the number of turns of the second spiral portion 12, the inner diameter of the spiral portion 11 is smaller than the inner diameter of the spiral portion 12, and the product of the number of turns of the first spiral portion 11 and the inner diameter of the spiral portion 12 is equal. That is, the induced electromotive force E1 generated by the first spiral portion is equal to the induced electromotive force E2 generated by the second spiral portion 12, so that when the implanted electrode wire 100 is in the NMR environment, the induced electromotive force E1 generated by the first spiral portion 11 and the induced electromotive force E2 generated by the second spiral portion 12 completely cancel each other out.

[0059] When the number of turns of the first spiral portion 11 is less than the number of turns of the second spiral portion 12, the inner diameter of the first spiral portion 11 is greater than the inner diameter of the second spiral portion 12, and the product of the number of turns of the first spiral portion 11 and the inner diameter of the spiral portion 12 is equal. That is, the induced electromotive force E1 generated by the first spiral portion 11 is equal to the induced electromotive force E2 generated by the second spiral portion 12, so that when the implanted electrode wire 100 is in the NMR environment, the induced electromotive force E1 generated by the first spiral portion 11 and the induced electromotive force E2 generated by the second spiral portion 12 completely cancel each other out.

[0060] As a preferred embodiment, the number of turns, inner diameter, and pitch of the first helical portion 11 are equal to those of the second helical portion 12. That is, the first helical portion 11 and the second helical portion 12 differ only in their helical direction; all other parameters are identical. This ensures that when the implanted electrode lead 100 is in an NMR environment, the induced electromotive force E1 generated by the first helical portion 11 and the induced electromotive force E2 generated by the second helical portion 12 completely cancel each other out, avoiding the influence of the NMR environment on the stimulation circuit. It also ensures that the induced magnetic field generated by the first helical portion 11 and the induced magnetic field generated by the second helical portion 12 completely cancel each other out, preventing the implanted electrode lead 100 from being attracted by a strong magnetic field and causing displacement of its implantation position.

[0061] This invention also provides a nerve stimulation system, which may include a stimulator and an implantable electrode lead 100 as described in any of the above embodiments. One end of the implantable electrode lead 100 may be implanted in the patient's body, and the other end of the implantable electrode lead 100 may be electrically connected to the stimulator. The stimulator may be a pulse generator, which transmits stimulation signals to the stimulation electrode through the implantable electrode lead 100, and the stimulation electrode stimulates the patient's affected area.

[0062] The neurostimulation system may also include an extension lead (not shown), through which the stimulator can be electrically connected to the implantable electrode lead 100, i.e., one end of the extension lead can be electrically connected to the stimulator, and the other end of the extension lead can be electrically connected to the implantable electrode lead 100.

[0063] 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 electrode lead, characterized in that, It includes a stimulation segment for providing electrical stimulation, a connection segment electrically connected to the stimulator, and an intermediate segment connecting the stimulation segment and the connection segment. The intermediate segment includes at least one strand of wire, and the strand of wire includes at least one first helical portion and at least one second helical portion. In this configuration, the stranded wire of the first spiral portion is wound in a spiral shape in a first spiral direction, and the stranded wire of the second spiral portion is wound in a spiral shape in a second spiral direction, wherein the first spiral direction and the second spiral direction are opposite.

2. The implantable electrode lead according to claim 1, characterized in that, The implantable electrode lead also includes a transition portion connecting the first helical portion and the second helical portion.

3. The implantable electrode lead according to claim 1, characterized in that, When the first helical direction is a right-hand helical direction, the second helical direction is a left-hand helical direction; or... When the first helical direction is a left-hand helical direction, the second helical direction is a right-hand helical direction.

4. The implantable electrode lead according to claim 1, characterized in that, The number of turns in the first spiral portion is the same as the number of turns in the second spiral portion, or the number of turns in the first spiral portion is different from the number of turns in the second spiral portion.

5. The implantable electrode lead according to claim 1, characterized in that, The inner diameter of the first spiral portion is the same as that of the second spiral portion, or the inner diameter of the first spiral portion is different from that of the second spiral portion.

6. The implantable electrode lead according to claim 1, characterized in that, The pitch of the first helical portion is the same as the pitch of the second helical portion, or the pitch of the first helical portion is different from the pitch of the second helical portion.

7. The implantable electrode lead according to claim 1, characterized in that, When the number of turns in the first helical section is greater than the number of turns in the second helical section, the inner diameter of the first helical section is smaller than the inner diameter of the second helical section, so that the induced electromotive force generated by the first helical section and the induced electromotive force generated by the second helical section cancel each other out when the implanted electrode wire is in an NMR environment; or... When the number of turns of the first spiral section is less than the number of turns of the second spiral section, the inner diameter of the first spiral section is greater than the inner diameter of the second spiral section, so that the induced electromotive force generated by the first spiral section and the induced electromotive force generated by the second spiral section cancel each other out when the implanted electrode wire is in a nuclear magnetic resonance environment.

8. The implantable electrode lead according to claim 2, characterized in that, The transition portion is a part of the stranded wire, or the transition portion is a connector.

9. The implantable electrode lead according to claim 2, characterized in that, When the transition portion is part of the stranded wire, the stranded wire of the transition portion extends axially along the implanted electrode lead; and / or, When the stranded wire is multi-stranded, the transition section connects the stranded wires of the first spiral section and the stranded wires of the second spiral section one by one.

10. The implantable electrode lead according to claim 1, characterized in that, The stranded wire includes at least one conductor, which is covered with an insulating layer.

11. The implantable electrode lead according to claim 10, characterized in that, The stimulation segment includes at least one stimulation contact, the connection segment includes at least one connection ring, one end of the conductor is electrically connected to the stimulation contact, and the other end of the conductor is electrically connected to the connection ring.

12. A neural stimulation system, characterized in that, include: Stimulator; The implantable electrode lead as described in any one of claims 1 to 11, wherein one end of the implantable electrode lead is implanted in the patient's body, and the other end of the implantable electrode lead is electrically connected to the stimulator.

13. The neural stimulation system according to claim 12, characterized in that, The neural stimulation system also includes: An extension lead is provided, through which the stimulator is electrically connected to the implantable electrode lead.

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