Electrode wire

Abstract

The utility model relates to the technical field of medical products, and discloses an electrode wire. Wherein the electrode wire comprises a stimulation end, a connecting end and a middle section connecting the stimulation end and the connecting end, the stimulation end is provided with at least one first direction electrode assembly, and the first direction electrode assembly comprises a first electrode plate, a second electrode plate and a third electrode plate which are arranged at intervals in an insulating mode in the circumferential direction; the length of the first electrode plate in the axial direction of the electrode wire is smaller than the length of the second electrode plate and the length of the third electrode plate. After the electrode wire is implanted into a human body, the angles and the positions of the first electrode plate, the second electrode plate and the third electrode plate in the first direction electrode assembly can be obtained through a CT image, the electrode plates in the specific direction can be conveniently controlled to work, the rotation direction of a contact is determined without additional direction identification, the product structure is optimized, and the production cost is reduced. Meanwhile, electrode wire metal consumption can be reduced, and cost is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical products, in particular to an electrode lead. BACKGROUND

[0002] Deep brain stimulation (DBS) is an invasive neuromodulation technology. Through stereotactic surgery, the technology implants a stimulating electrode in a specific neural structure of the human brain and implants a neurostimulator in the human body to connect the electrode, which emits weak electrical pulses that can be adjusted and controlled, thereby changing the electrical activity and function of the brain neural circuit and network to achieve the purpose of controlling and improving the patient's symptoms.

[0003] The stimulating output metal contact of the traditional DBS electrode is a circular ring, and the whole electrode is rotationally symmetrical at any angle and has no specific orientation. The current new DBS electrode design allows the original circular ring-shaped stimulating output metal contact to be split into multiple pieces, usually three equal pieces. These electrodes support independent regulation of the stimulating output parameters of a piece or multiple pieces, thereby realizing stimulation of specific directional brain tissue, and are therefore called "directional electrodes".

[0004] However, after the DBS electrode is implanted in the human body, the angle of the piece cannot be obtained, and the types of the three pieces cannot be distinguished, so it is inconvenient to control the specific directional piece.

[0005] Therefore, there is an urgent need for an electrode lead to solve the above problems. CONTENT OF THE INVENTION

[0006] Based on the above, the purpose of the present application is to provide an electrode lead that facilitates the control of specific directional electrode pieces, optimizes the product structure, reduces the amount of electrode lead metal, and saves costs.

[0007] To achieve the above purpose, the following technical solutions are adopted:

[0008] An electrode lead, comprising a stimulating end, a connecting end, and an intermediate section connecting the stimulating end and the connecting end, wherein the stimulating end is provided with at least one first directional electrode assembly, the first directional electrode assembly comprises first, second, and third electrode pieces arranged in a circumferential direction with insulation spacing, and the length of the first electrode piece in the axial direction of the electrode lead is less than the length of the second electrode piece and the third electrode piece, respectively.

[0009] As a preferred technical solution of the electrode lead, the arc angle of the second electrode piece is X1, 10°≤X1≤170°; the arc angle of the third electrode piece is X2, 10°≤X2≤170°; and / or

[0010] The first arc-shaped notch is provided at one end of the second electrode piece and the third electrode piece close to each other, and the arc-shaped angle of the first arc-shaped notch is Y, 10°≤Y<160°.

[0011] As a preferred technical scheme of the electrode lead, the first electrode piece is multiple.

[0012] As a preferred technical scheme of the electrode lead, the end faces of the first electrode piece, the second electrode piece and the third electrode piece at one end are flush.

[0013] As a preferred technical scheme of the electrode lead, the lengths of the second electrode piece and the third electrode piece in the axial direction of the electrode lead are equal.

[0014] As a preferred technical scheme of the electrode lead, the length of the second electrode piece is greater than the length of the third electrode piece in the axial direction of the electrode lead.

[0015] As a preferred technical scheme of the electrode lead, the stimulation end of the electrode lead further comprises at least one stimulation ring, and the stimulation ring is arranged in the axial direction of the electrode lead and spaced apart from the first-direction electrode assembly.

[0016] As a preferred technical scheme of the electrode lead, the stimulation end of the electrode lead is further provided with at least one second-direction electrode assembly, and the second-direction electrode assembly comprises at least three fourth electrode pieces, and the at least three fourth electrode pieces are arranged in the circumferential direction and spaced apart.

[0017] As a preferred technical scheme of the electrode lead, the stimulation end of the electrode lead is provided with two stimulation rings, and the stimulation end of the electrode lead is sequentially arranged in the axial direction and spaced apart by one stimulation ring, the first-direction electrode assembly, the second-direction electrode assembly and another stimulation ring.

[0018] As a preferred technical scheme of the electrode lead, the stimulation end of the electrode lead is further provided with three second-direction electrode assemblies, and the first-direction electrode assembly and the three second-direction electrode assemblies are sequentially arranged in the axial direction of the stimulation end of the electrode lead and spaced apart.

[0019] As a preferred technical scheme of the electrode lead, the stimulation end of the electrode lead is provided with two first-direction electrode assemblies and two stimulation rings, and the stimulation end of the electrode lead is sequentially arranged in the axial direction and spaced apart by one stimulation ring, one first-direction electrode assembly, another first-direction electrode assembly and another stimulation ring; the first electrode pieces of the two first-direction electrode assemblies are located on the same side.

[0020] The stimulation end of the electrode lead wire is provided with four first direction electrode assemblies which are insulated and spaced apart along the axial direction of the electrode lead wire.

[0021] The beneficial effects of the present application are:

[0022] The present application provides an electrode lead wire, a CT image of a stimulation end of the electrode lead wire implanted in a human body is obtained after surgery; a preset cross-sectional CT image of a preset position cross section is selected, and the preset position cross section only contains a second electrode sheet and a third electrode sheet; the preset cross-sectional CT image is analyzed, the preset cross-sectional CT image includes two first bright line regions and two second bright line regions, the brightness of the first bright line region is greater than the brightness of the second bright line region, and the middle positions of the two first bright line regions correspond to the middle positions of the second electrode sheet and the third electrode sheet. Since the relative positions of the first electrode sheet, the second electrode sheet and the third electrode sheet are fixed, the angles and positions of the first electrode sheet, the second electrode sheet and the third electrode sheet are determined according to the middle positions of the second electrode sheet and the third electrode sheet. After the electrode lead wire is implanted in the human body, the angles and positions of the first electrode sheet, the second electrode sheet and the third electrode sheet in the first direction electrode assembly can be obtained through the CT image, which is convenient for controlling the work of the electrode sheet in a specific direction, and does not need additional direction marks to determine the rotation direction of the contact point, optimizes the product structure, and at the same time can reduce the metal consumption of the electrode lead wire and save costs. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and these drawings.

[0024] Figure 1 is a structural schematic diagram of the electrode lead wire provided by the first embodiment of the present application;

[0025] Figure 2 is a structural schematic diagram of the first direction electrode assembly provided by the first embodiment of the present application;

[0026] Figure 3 is a schematic diagram of the preset position cross section located at B-B in Figure 2 ;

[0027] Figure 4 is a schematic diagram of the preset cross-sectional CT image provided by the first embodiment of the present application;

[0028] Figure 5 is a structural schematic diagram of the stimulation end of the electrode lead wire provided by the first embodiment of the present application;

[0029] Figure 6 is a flow chart of the method for identifying the orientation of the electrode piece provided in Embodiment One of the present application;

[0030] Figure 7 is a schematic diagram of technical principle 1 of the hardening effect artifact provided in Embodiment One of the present application;

[0031] Figure 8 is a schematic diagram of technical principle 2 of the hardening effect artifact provided in Embodiment One of the present application;

[0032] Figure 9 is a schematic diagram of the combination of technical principle 1 and technical principle 2 of the hardening effect artifact provided in Embodiment One of the present application;

[0033] Figure 10 is a structural schematic diagram of the first-direction electrode assembly including two first electrode pieces provided in the present application;

[0034] Figure 11 is a structural schematic diagram of the stimulating end of the electrode lead provided in Embodiment Two of the present application;

[0035] Figure 12 is a structural schematic diagram of the stimulating end of the electrode lead provided in Embodiment Three of the present application;

[0036] Figure 13 is a structural schematic diagram of the stimulating end of the electrode lead provided in Embodiment Four of the present application;

[0037] Figure 14 is a structural schematic diagram of the stimulating end of the electrode lead provided in Embodiment Five of the present application.

[0038] The figures are marked as follows:

[0039] 10, electrode lead; 101, stimulating end; 102, connecting end; 103, intermediate section; 20, high-attenuation object; 201, dark stripe; 202, bright stripe;

[0040] 1, first-direction electrode assembly; 11, first electrode piece; 12, second electrode piece; 13, third electrode piece;

[0041] 2, stimulating ring;

[0042] 3, second-direction electrode assembly; 31, fourth electrode piece; 41, first bright line region; 42, second bright line region. DETAILED DESCRIPTION

[0043] The application will be described in further detail below with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are intended to be illustrative only and not limiting of the application. It is also to be understood that the terminology used herein is for the purpose of describing the specific embodiments only and is not intended to be limiting.

[0044] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrated; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0046] In the description of the present embodiment, the terms "up", "down", "left", "right" and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0047] Embodiment one

[0048] The technical field and related terms of the embodiments of the present application are briefly described below.

[0049] Implantable medical systems include implantable neurostimulation systems, implantable cardiac electrostimulation systems (also known as cardiac pacemakers), implantable drug delivery systems (IDDS) and lead extension systems, etc. Implantable neurostimulation systems are, for example, deep brain stimulation systems (DBS), implantable cortical nerve stimulation systems (CNS), implantable spinal cord stimulation systems (SCS), implantable sacral nerve stimulation systems (SNS), implantable vagus nerve stimulation systems (VNS), etc.

[0050] Implantable neurostimulation systems include stimulators (i.e., implantable neurostimulators) implanted in patients and programming devices disposed outside the patients. That is, a stimulator is a medical device, or in other words, a medical device includes a stimulator. Related neuromodulation techniques mainly involve implanting electrodes (electrodes are, for example, in the form of electrode leads) at specific locations (i.e., target sites) of tissues of living organisms through stereotactic surgery, delivering electrical pulses to the target sites through the electrodes, and modulating electrical activities and functions of corresponding neural structures and networks, so as to improve symptoms and relieve pain.

[0051] As an example, a DBS includes an IPG (Implantable Pulse Generator), an extension lead and an electrode lead, the IPG being connected to the electrode lead through the extension lead. The IPG is implanted in a patient, for example, implanted in front of the patient's chest or other body parts.

[0052] As another example, a DBS includes an IPG and an electrode lead, the IPG being directly connected to the electrode lead. The IPG is implanted in the patient's head, for example, the patient's skull is slotted, and then the IPG is installed in the slot of the skull, in which case the IPG can not protrude out of the outer surface of the skull, or can partially protrude out of the outer surface of the skull.

[0053] The IPG provides controllable electrical stimulation therapy (or electrical stimulation energy) to the tissues in the body in response to programming instructions sent by the programming device, relying on a sealed battery and circuitry. The IPG delivers one or more controllable specific electrical stimulations to specific regions of the tissues in the body through the electrode lead.

[0054] In some embodiments, the extension lead is used in conjunction with the IPG as a transmission medium for electrical stimulation, delivering electrical stimulation generated by the IPG to the electrode lead.

[0055] In some embodiments, the electrical stimulation can be delivered in the form of a pulsed signal or in the form of a non-pulsed signal. For example, the electrical stimulation can be delivered as a signal having various waveform shapes, frequencies, and amplitudes. Thus, the electrical stimulation in the form of a non-pulsed signal can be a continuous signal, which can have a sinusoidal waveform or other continuous waveform.

[0056] The electrode lead delivers the electrical stimulation received from the IPG or the extension lead to a specific region of the in-vivo tissue through a plurality of electrode contacts. The stimulator is provided with one or more electrode leads, which are unilateral or bilateral, and the electrode leads are provided with a plurality of electrode contacts, which can be arranged uniformly or non-uniformly in the circumferential direction of the electrode lead. As an example, the electrode contacts can be arranged in a 4-row-by-3-column array (totally 12 electrode contacts) in the circumferential direction of the electrode lead. The electrode contacts can include stimulation electrode contacts and / or acquisition electrode contacts. The electrode contacts can have a sheet shape, a ring shape, a dot shape, etc.

[0057] In some embodiments, the in-vivo tissue to be stimulated can be the brain tissue of the patient, and the site to be stimulated can be a specific site of the brain tissue. When the patient has different types of diseases, the site to be stimulated is generally different, and the number of stimulation contacts (single source or multiple sources) used, the application of one or more specific electrical stimulations (single channel or multiple channels), and the stimulation parameters (values) are also different.

[0058] The embodiments of the present application are not limited to the types of diseases applicable, and can be applicable to deep brain stimulation (DBS), spinal cord stimulation (SCS), sacral nerve stimulation, gastric stimulation, peripheral nerve stimulation, functional electrical stimulation, etc. The types of diseases that can be treated or managed by DBS include but are not limited to: convulsive diseases (e.g., epilepsy), pain, migraine, mental diseases (e.g., major depressive disorder (MDD)), bipolar disorder, anxiety disorder, post-traumatic stress disorder, dysthymia, obsessive-compulsive disorder (OCD), behavioral disorder, emotional disorder, memory disorder, mental state disorder, movement disorder (e.g., essential tremor or Parkinson's disease), Huntington's disease, Alzheimer's disease, drug addiction, autism, or other neurological or psychiatric diseases and impairments.

[0059] In the embodiments of the present application, when the programming device and the stimulator establish a programming connection, the programming device can adjust one or more stimulation parameters of the stimulator (or one or more stimulation parameters of the pulse generator, different stimulation parameters correspond to different electrical stimulation), or the stimulator can sense the electrical physiological activity of the patient to acquire an electrical physiological signal, and the stimulation parameters of the stimulator can be continuously adjusted based on the acquired electrical physiological signal to achieve closed-loop control (or adaptive adjustment) of the stimulation parameters.

[0060] The stimulation parameters can include at least one of the following: electrode contact identification (for example, 2# electrode contact and 3# electrode contact) for delivering electrical stimulation, frequency (for example, number of electrical stimulation pulse signals per unit time 1s, in Hz), pulse width (duration of each pulse, in μs), amplitude (generally expressed in voltage, i.e., intensity of each pulse, in V), timing (for example, can be continuous or burst, burst refers to discontinuous timing behavior composed of multiple processes), stimulation mode (including one or more of current mode, voltage mode, timed stimulation mode, and cyclic stimulation mode), physician control upper and lower limits (range adjustable by the physician), and patient control upper and lower limits (range adjustable by the patient).

[0061] In some embodiments, the stimulation parameters of the stimulator can be adjusted in current mode or voltage mode.

[0062] The program control device can include a physician program control device (i.e., a program control device used by a physician) and / or a patient program control device (i.e., a program control device used by a patient). The physician program control device is, for example, a smart terminal device such as a tablet computer, a notebook computer, a desktop computer, a mobile phone, etc. equipped with program control software. The patient program control device is, for example, a smart terminal device such as a tablet computer, a notebook computer, a desktop computer, a mobile phone, etc. equipped with program control software, and can also be other electronic devices with program control functions (for example, a charger, an electrophysiological acquisition device, etc. with program control functions).

[0063] As shown in Figure 1 and Figure 2 The present embodiment provides an electrode lead 10, which includes a stimulation end 101, a connection end 102, and an intermediate section 103 connecting the stimulation end 101 and the connection end 102. The stimulation end 101 is provided with at least one first direction electrode assembly 1, which includes first electrode pieces 11, second electrode pieces 12, and third electrode pieces 13 arranged in a circumferential direction with insulation spacing. The lengths of the first electrode pieces 11 in the axial direction of the electrode lead 10 are respectively less than the lengths of the second electrode pieces 12 and the third electrode pieces 13. In the present embodiment, the stimulation end 101 of the electrode lead 10 is provided with a bracket, and the first direction electrode assembly 1 is mounted on the bracket.

[0064] As shown in Figures 1-4 , a CT image of the stimulation end 101 of the electrode lead 10 implanted in the human body is obtained after surgery; the CT image is subjected to metal artifact removal to obtain a preset cross-sectional CT image; a preset cross-sectional CT image of a preset position cross-section in the CT image is selected, and the preset position cross-section only includes the second electrode pieces 12 and the third electrode pieces 13; as shown in Figure 3As shown, the preset position cross section only contains the second electrode sheet 12 and the third electrode sheet 13; by analyzing the preset cross section CT image, such as Figure 4 As shown, the preset cross section CT image includes two first bright line areas 41 and two second bright line areas 42, the brightness of the first bright line area 41 is greater than the brightness of the second bright line area 42, and the middle positions of the two first bright line areas 41 correspond to the middle positions of the second electrode sheet 12 and the third electrode sheet 13. Since the relative positions of the first electrode sheet 11, the second electrode sheet 12 and the third electrode sheet 13 are fixed, the angles and positions of the first electrode sheet 11, the second electrode sheet 12 and the third electrode sheet 13 are determined according to the middle positions of the second electrode sheet 12 and the third electrode sheet 13. After the electrode lead 10 is implanted in the human body, the angles and positions of the first electrode sheet 11, the second electrode sheet 12 and the third electrode sheet 13 in the first direction electrode assembly 1 can be obtained through the CT image, which is convenient for controlling the work of the electrode sheet in a specific direction, and does not need additional direction marks to determine the contact rotation direction, optimizes the product structure, and at the same time can reduce the metal consumption of the electrode lead 10, saving the cost.

[0065] In this embodiment, the end faces of the first electrode sheet 11, the second electrode sheet 12 and the third electrode sheet 13 at one end are flush. Therefore, the area of the gap surrounded between the other end of the first electrode sheet 11 and the second electrode sheet 12 and the third electrode sheet 13 is increased, the range of the preset position cross section is increased, and the efficiency of obtaining the cross section image of the preset position cross section is improved.

[0066] As shown in the figure, Figure 5 Further, the stimulation end 101 of the electrode lead 10 further includes at least one stimulation ring 2, and the stimulation ring 2 is arranged in the axial direction of the electrode lead 10 and is spaced apart from the first direction electrode assembly 1.

[0067] In this embodiment, the stimulation end 101 of the electrode lead 10 is provided with two first direction electrode assemblies 1 and two stimulation rings 2, and the stimulation end 101 of the electrode lead 10 is sequentially and spaced apart from one stimulation ring 2, one first direction electrode assembly 1, another first direction electrode assembly 1 and another stimulation ring 2 in the axial direction, forming an 1-3-3-1 type 8-contact electrode lead 10; the first electrode sheets 11 of the two first direction electrode assemblies 1 are located on the same side. Since the positions of the first electrode sheet 11 and the second electrode sheet 12 in the two first direction electrode assemblies 1 are fixed, the angle and position of the first electrode sheet 11 in one first direction electrode assembly 1 are obtained, and the angle and position of any electrode sheet are obtained. In other embodiments, the number of first direction electrode assemblies 1 can be adaptively selected according to requirements, which are within the protection scope of this embodiment.

[0068] In this embodiment, the lengths of the second electrode sheet 12 and the third electrode sheet 13 of the two first direction electrode assemblies 1 in the axial direction of the electrode lead 10 are equal.

[0069] As Figure 6 shown, the embodiment also provides a method for identifying the orientation of the electrode pads, applied to the electrode lead 10 described above, the method for identifying the orientation of the electrode pads comprising the following steps:

[0070] S1, obtaining a CT image of the stimulation end 101 of the electrode lead 10; during surgery, a CT image of the electrode lead 10 implanted in the human body can be obtained.

[0071] S2, selecting a preset cross-sectional CT image of a preset position cross section in the CT image, as Figure 3 shown, the preset position cross section only contains the second electrode pad 12 and the third electrode pad 13;

[0072] S3, as Figure 4 shown, the preset cross-sectional CT image includes two first bright line areas 41 and two second bright line areas 42, the brightness of the first bright line area 41 is greater than that of the second bright line area 42, the middle positions of the two first bright line areas 41 correspond to the middle positions of the second electrode pad 12 and the third electrode pad 13, and the angles and positions of the first electrode pad 11, the second electrode pad 12 and the third electrode pad 13 are determined according to the middle positions of the second electrode pad 12 and the third electrode pad 13.

[0073] For example, in this embodiment, the first electrode pad 11 is one, since the relative angles and positions of the first electrode pad 11, the second electrode pad 12 and the third electrode pad 13 are fixed, the included angle between adjacent electrode pads in the first electrode pad 11, the second electrode pad 12 and the third electrode pad 13 is 120°, therefore, the middle positions of the two first bright line areas 41 rotated by 180° are the positions of the first electrode pad 11, and the middle positions of the two first bright line areas 41 rotated by 60° left and right are the positions of the second electrode pad 12 and the third electrode pad 13 respectively.

[0074] In other embodiments, the first electrode pad 11 is multiple. As Figure 10 shown, taking two first electrode pads 11 as an example, the included angle between adjacent electrode pads is 90°, therefore, the middle positions of the two first bright line areas 41 rotated by 135° left and right are the positions of the two first electrode pads 11 respectively, and the middle positions of the two first bright line areas 41 rotated by 45° left and right are the positions of the second electrode pad 12 and the third electrode pad 13 respectively.

[0075] Through the method for identifying the orientation of the electrode pads, the operator can intuitively identify the angles and positions of the first electrode pad 11, the second electrode pad 12 and the third electrode pad 13, improve the operation convenience, and improve the application success rate.

[0076] It needs to be particularly pointed out that the basic principle of CT scanning is to scan the layer of a certain thickness of the human body by using an X-ray beam. When the X-ray penetrates the human body, the intensity of the ray received by the detector will change due to the different absorption degrees of different tissues. These changed ray signals are converted into electrical signals and then converted into digital signals through an analog / digital converter, and then input into a computer for processing. The X-ray beam is composed of single photons with a certain energy range. When the beam passes through an object, it becomes "harder", producing a metal artifact, and this effect is called a beam hardening artifact: that is, dark bands or stripes appear between dense objects in the image. The beam hardening artifact can produce dark stripes 201 between two high-attenuation objects 20 (such as metal). They can also produce dark stripes 201 along the long axis of a single high-attenuation object 20, so the bright stripes 202 are adjacent to the dark stripes 201. Therefore, the present embodiment utilizes the principle of the beam hardening artifact to produce a directional artifact for indicating the position of the electrode sheet.

[0077] For example, as shown in Figure 7 , using technical principle 1, the beam hardening artifact produces dark stripes 201 between two high-attenuation objects 20 (such as metal).

[0078] As shown in Figure 8 , using technical principle 2, the beam hardening artifact produces dark stripes 201 along the long axis of a single high-attenuation object 20.

[0079] The beam hardening artifact is produced by combining the above technical principle 1 and technical principle 2. Another problem that causes strip artifacts is the Compton scattering effect. Scattering can cause X-ray photons to change direction and energy, so as shown in Figure 4 and Figure 9 , the bright and dark stripes 201 are not completely symmetrical, and the brightness and darkness are different, so in the CT actual image; that is, the two brightest first bright line regions 41 and the darkest middle stripe provide a directional indication function of the first electrode sheet 11.

[0080] Preferably, the arc angle of the second electrode sheet 12 is X1, 10°≤X1≤170°; the arc angle of the third electrode sheet 13 is X2, 10°≤X2≤170°; and / or the first arc-shaped notch is arranged at the end of the second electrode sheet 12 and the third electrode sheet 13 close to each other, and the arc angle of the first arc-shaped notch is Y, 10°≤Y<160°, to ensure that the screen of the first bright line region 41, the second bright line region 42 and the dark stripe 201 in the preset cross-sectional CT image is clear, the partition is obvious, and the identification accuracy of the middle region of the two first bright line regions 41 is improved.

[0081] Example 2

[0082] like Figure 11 As shown, this embodiment provides an electrode wire 10, and the structure of the electrode wire 10 provided in this embodiment is basically the same as that in Embodiment 1, except that the structure of the stimulation end 101 of the electrode wire 10 is partially different. This embodiment will not describe the structure that is the same as that in Embodiment 1.

[0083] In this embodiment, the stimulation end 101 of the electrode wire 10 is provided with four first-direction electrode assemblies 1. The four first-direction electrode assemblies 1 are insulated and spaced apart along the axial direction of the electrode wire 10, forming a 3-3-3-3 type 12-contact electrode wire 10. The first electrode plates 11 of two first-direction electrode assemblies 1 are located on the same side. By obtaining the angle and position of the first electrode plate 11 within a first-direction electrode assembly 1, the angle and position of any electrode plate can be obtained. In other embodiments, the number of first-direction electrode assemblies 1 can be adaptively selected according to requirements, all of which are within the protection scope of this embodiment.

[0084] Example 3

[0085] like Figure 12 As shown, this embodiment provides an electrode wire 10, and the structure of the electrode wire 10 provided in this embodiment is basically the same as that in Embodiment 1, except that the structure of the stimulation end 101 of the electrode wire 10 is partially different. This embodiment will not describe the structure that is the same as that in Embodiment 1.

[0086] In this embodiment, the stimulation end 101 of the electrode wire 10 is provided with two stimulation rings 2. Along the axial direction, the stimulation end 101 of the electrode wire 10 is sequentially provided with one stimulation ring 2, one first-direction electrode assembly 1, another first-direction electrode assembly 1, and another stimulation ring 2, forming a 1-3-3-1 type 8-contact electrode wire 10. In this embodiment, the second electrode piece 12 and the third electrode piece 13 of one first-direction electrode assembly 1 have equal lengths in the axial direction of the electrode wire 10. In the axial direction of the electrode wire 10, the length of the second electrode piece 12 of the other first-direction electrode assembly 1 is greater than the length of the third electrode piece 13.

[0087] Example 4

[0088] like Figure 13 As shown, this embodiment provides an electrode wire 10, and the structure of the electrode wire 10 provided in this embodiment is basically the same as that in Embodiment 1, except that the structure of the stimulation end 101 of the electrode wire 10 is partially different. This embodiment will not describe the structure that is the same as that in Embodiment 1.

[0089] The stimulation end 101 of the electrode wire 10 is also provided with at least one second-direction electrode assembly 3. The second-direction electrode assembly 3 includes at least three fourth electrode plates 31, which are arranged with circumferential insulation at intervals. In this embodiment, the second-direction electrode 3 includes three fourth electrode plates 31. Since the relative positions of the electrode plates in the first-direction electrode assembly 1 and the second-direction electrode assembly 3 are fixed, the angle and position of the first electrode plate 11 in the first-direction electrode assembly 1 can be obtained to determine the angle and position of any electrode plate on the electrode wire 10.

[0090] In this embodiment, the stimulation end 101 of the electrode wire 10 is provided with two stimulation rings 2. The stimulation end 101 of the electrode wire 10 is provided with one stimulation ring 2, a first direction electrode assembly 1, a second direction electrode assembly 3 and another stimulation ring 2 in sequence along the axial direction, forming a 1-3-3-1 type 8-contact electrode wire 10.

[0091] It should be noted that in this embodiment, the length of the fourth electrode piece 31 is the same as the length of the second electrode piece 12. In other embodiments, the number of the first directional electrode assembly 1 and the second directional electrode assembly 3 can be adaptively selected according to requirements, and the length of the fourth electrode piece 31 can be adaptively selected according to requirements. When there are multiple second directional electrode assemblies 3, the lengths of the fourth electrode pieces 31 of the multiple second directional electrode assemblies 3 can be the same or different, all of which are within the protection scope of this embodiment.

[0092] Example 5

[0093] like Figure 14 As shown, this embodiment provides an electrode wire 10, and the structure of the electrode wire 10 provided in this embodiment is basically the same as that in Embodiment 1, except that the structure of the stimulation end 101 of the electrode wire 10 is partially different. This embodiment will not describe the structure that is the same as that in Embodiment 1.

[0094] In this embodiment, the stimulation end 101 of the electrode wire 10 is provided with three second-direction electrode assemblies 3. The first-direction electrode assembly 1 and the three second-direction electrode assemblies 3 are arranged sequentially and spaced apart along the axial direction of the stimulation end 101 of the electrode wire 10, forming a 3-3-3-3 type 12-contact electrode wire 10. In other embodiments, the number of first-direction electrode assemblies 1 and second-direction electrode assemblies 3 can be adaptively selected according to needs, all of which are within the protection scope of this embodiment.

[0095] Example 6

[0096] This embodiment provides an implantable neurostimulation system, including an extension lead, an implantable pulse generator, and an electrode lead 10 of any of the above embodiments. One end of the extension lead is electrically connected to the electrode lead 10, and the other end is electrically connected to the implantable pulse generator.

[0097] Note that the above merely describes preferred embodiments of the present application and the principles of technology applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, modifications and substitutions can be made by those skilled in the art without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.

Claims

1. An electrode lead, characterized by The electrode wire includes a stimulation end (101), a connection end (102), and an intermediate section (103) connecting the stimulation end (101) and the connection end (102). The stimulation end (101) is provided with at least one first-direction electrode assembly (1). The first-direction electrode assembly (1) includes a first electrode plate (11), a second electrode plate (12), and a third electrode plate (13) arranged with circumferential insulation intervals. The length of the first electrode plate (11) in the axial direction of the electrode wire is less than the lengths of the second electrode plate (12) and the third electrode plate (13), respectively.

2. The electrode lead of claim 1, wherein The arc angle of the second electrode plate (12) is X1, 10°≤X1≤170°; the arc angle of the third electrode plate (13) is X2, 10°≤X2≤170°; and / or The second electrode plate (12) and the third electrode plate (13) are provided with a first arc-shaped notch at their respective ends, and the arc angle of the first arc-shaped notch is Y, 10°≤Y<160°.

3. The electrode lead of claim 1, wherein, The first electrode sheet (11) is multiple.

4. The electrode lead of claim 1, wherein, The end faces of the first electrode plate (11), the second electrode plate (12) and the third electrode plate (13) are flush.

5. The electrode lead of claim 1, wherein, The second electrode plate (12) and the third electrode plate (13) have the same length in the axial direction of the electrode wire.

6. The electrode lead of claim 1, wherein, The length of the second electrode piece (12) is greater than the length of the third electrode piece (13) in the axial direction of the electrode wire.

7. The electrode lead of claim 1, wherein, The stimulation end (101) of the electrode wire further includes at least one stimulation ring (2), which is spaced apart from the first direction electrode assembly (1) in the axial direction of the electrode wire.

8. The electrode lead of claim 1, wherein, The stimulation end (101) of the electrode wire is also provided with at least one second direction electrode assembly (3), the second direction electrode assembly (3) including at least three fourth electrode plates (31), the at least three fourth electrode plates (31) being arranged with circumferential insulation intervals.

9. The electrode lead of claim 8, wherein, The stimulation end (101) of the electrode wire is provided with two stimulation rings (2). The stimulation end (101) of the electrode wire is provided with one stimulation ring (2), the first direction electrode assembly (1), the second direction electrode assembly (3) and the other stimulation ring (2) in sequence along the axial direction.

10. The electrode lead of claim 8, wherein, The stimulation end (101) of the electrode wire is also provided with three second-direction electrode assemblies (3), and the first-direction electrode assembly (1) and the three second-direction electrode assemblies (3) are arranged sequentially at intervals along the axial direction of the stimulation end (101) of the electrode wire.

11. The electrode lead of claim 1, wherein, The stimulation end (101) of the electrode wire is provided with two first direction electrode assemblies (1) and two stimulation rings (2). The stimulation end (101) of the electrode wire is provided with one stimulation ring (2), one first direction electrode assembly (1), another first direction electrode assembly (1) and another stimulation ring (2) in sequence along the axial direction. The first electrode plates (11) of the two first direction electrode assemblies (1) are located on the same side.

12. The electrode lead of claim 1, wherein, The stimulation end (101) of the electrode lead wire is provided with four first direction electrode assemblies (1), and the four first direction electrode assemblies (1) are insulated and spaced in the axial direction of the electrode lead wire.

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