CN216963309U

CN216963309U - Implantable directional stimulating electrode

Info

Publication number: CN216963309U
Application number: CN202121182014.1U
Authority: CN
Inventors: 金有为; 史思思; 李晓波
Original assignee: Hangzhou Chengnuo Medical Technology Co ltd
Current assignee: Hangzhou Chengnuo Medical Technology Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-07-15
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses an implantable directional stimulating electrode, wherein two annular electrodes are arranged, 4 or 6 directional electrode plates are arranged, and 2 or 3 directional electrode plates form a group; the insulating head is the tail end of the whole electrode; the electrode comprises an annular electrode, an insulating part, a group of directional electrode plates, an insulating ring, an annular electrode and an electrode outer tube which are arranged in sequence from the tail end of the electrode; the group of direction electrode plates are 2 or 3 direction electrode plates which are uniformly distributed along the circumference; the insulating part is arranged between the direction electrode plates, the annular electrode, the insulating ring, the direction electrode plates and the insulating part are all arranged on the periphery of the electrode middle tube, the electrode spiral guide wire is arranged inside the electrode middle tube, the single-core electrode wire penetrates out of the electrode middle tube through the middle tube wire hole, and the single-core electrode wire is welded with the annular electrode and the direction electrode plates respectively. The directional electrode plate is flexible in arrangement, does not need an electrode support, and is simple in process and convenient to implement.

Description

Implantable directional stimulating electrode

Technical Field

The utility model relates to the field of electronic medical treatment, in particular to an implantable directional stimulating electrode.

Background

The deep brain electrical stimulation system belongs to a kind of implantable neural stimulation system, wherein the implantable neural stimulation system further comprises implantable cortical brain stimulation (CNS), implantable spinal cord electrical stimulation (SCS), implantable vagus nerve electrical stimulation (VNS) and the like, taking the deep brain electrical stimulation system as an example, the deep brain electrical stimulation system mainly comprises a pulse generator implanted in a body, electrodes and an external control device. The electrode is connected with the pulse generator, and the pulse generated by the pulse generator is transmitted to a specific nerve part to generate electrical stimulation, so that the normal human body function of the corresponding part is recovered. Deep brain stimulation may be used to treat a variety of diseases, including, for example, parkinson's disease, dystonia, essential tremor, chronic pain, and the like.

The stimulation electrode contacts that are currently common are arranged on the electrodes in a typical ring-like fashion. The current stimulates a specific neuron in the circumferential direction along the annular electrode contact. Because of the ring-like shape of these electrodes, the stimulation current cannot be directed to one or more specific locations around the ring electrode. Thus, a typical circular stimulation may result in unwanted stimulation of adjacent neural tissue, potentially leading to the development of some side effects.

The directional electrode in the prior art adopts a directional electrode contact matched with an internal support, and then is assembled and manufactured, particularly, the manufacture of the support is very complicated, and some or even three halves of the support are adhered.

SUMMERY OF THE UTILITY MODEL

In order to achieve the purpose, the technical scheme of the utility model is as follows: an implantable directional stimulating electrode comprises an electrode middle tube, a middle tube wire hole, an insulating ring, a ring-shaped electrode, an electrode spiral guide wire, a single-core electrode wire, an electrode outer tube, a directional electrode plate, an insulating part and an insulating head, wherein,

the number of the annular electrodes is two, 4 or 6 direction electrode plates are arranged, and 2 or 3 direction electrode plates form a group; the insulating head is the tail end of the whole electrode; the electrode comprises an annular electrode, an insulating part, a group of directional electrode plates, an insulating ring, an annular electrode and an electrode outer tube which are arranged in sequence from the tail end of the electrode; the group of direction electrode plates are 2 or 3 direction electrode plates which are uniformly distributed along the circumference; the insulating part sets up between the direction electrode piece, and cyclic annular electrode, insulating ring, direction electrode piece and insulating part all set up in electrode well pipe periphery, and electrode spiral seal wire sets up inside the electrode well pipe, and single core wire electrode wears out the electrode well pipe through well pipe thread hole, and single core wire electrode welds respectively with cyclic annular electrode and direction electrode piece.

Preferably, the direction electrode plate is welded with the single-core electrode wire and then fixed with the electrode middle tube through an adhesive.

Preferably, the insulation part is formed by an injection molding tool for an injection molding ring.

Preferably, the injection molding ring is made of TPU, medical epoxy resin, medical silica gel and implantable plastic.

Preferably, the two sides of the direction electrode plate are provided with fixing wings, so that the direction electrode plate is integrally in a boss shape.

Preferably, the two sides of the direction electrode plate are provided with fixing wings, so that the direction electrode plate is in a C-like shape as a whole.

The utility model at least comprises the following beneficial effects:

1. the electrode middle tube and the electrode outer tube are arranged, both tubes play insulating and supporting roles, and the process for processing the tube into a thin tube shape is simple and low in cost;

2. the electrode spiral guide wire is arranged in the electrode middle tube, and a single-core electrode wire which needs to be welded with the annular electrode and the directional electrode slice penetrates out of a middle tube wire hole arranged on the electrode middle tube, so that the design is ingenious;

3. the number and the shape of the direction electrode plates are optionally set by at least two schemes, so that the direction electrode plates are ensured not to fall off while the direction electric stimulation is output;

4. the insulating and fixing of the direction electrode plates are formed by injection molding of injection molding rings for injection molding tools, so that the insulating parts of the whole direction electrode plates are integrally formed, and the separation and mutual conductive influence of the direction electrode plates are avoided.

Drawings

FIG. 1 is a schematic structural view of an implantable directional stimulation electrode according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a welded ring electrode structure of an implantable directional stimulation electrode according to an embodiment of the present invention;

FIG. 3 is a schematic view of a welding direction electrode sheet structure of an implantable directional stimulation electrode according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a post-welding electrode sheet structure of an implantable directional stimulation electrode according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a post-injection molded insulating ring of an implantable directional stimulation electrode according to an embodiment of the method of the present invention;

FIG. 6 is a schematic illustration of a cleaned implantable directional stimulation electrode according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of an implantable directional stimulation electrode according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of an implantable directional stimulation electrode according to yet another embodiment of the present invention;

FIG. 9 is a schematic view of a directional electrode patch structure of an implantable directional stimulation electrode according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a directional electrode sheet of an implantable directional stimulation electrode according to another embodiment of the utility model.

Detailed Description

Example 1

Referring to fig. 1, an implantable directional stimulating electrode comprises an electrode middle tube 1, a middle tube wire hole 1-1, an insulating ring 2, a ring electrode 3, an electrode spiral guide wire 4, a single core electrode wire 4-1, an electrode outer tube 5, a directional electrode sheet 6, an insulating part 7 and an insulating head 9, wherein,

two annular electrodes 3 are arranged, 4 or 6 direction electrode plates 6 are arranged, and 2 or 3 direction electrode plates 6 form a group; the insulating head 9 is the end of the whole electrode; a ring electrode 3, an insulating part 7, a group of direction electrode plates 6, an insulating ring 2, a ring electrode 3 and an electrode outer tube 5 are arranged in sequence from the tail end of the electrode; the group of direction electrode plates 6 are 2 or 3 direction electrode plates 6 which are uniformly distributed along the circumference; the insulating part 7 is arranged between the direction electrode plates 6, the annular electrode 3, the insulating ring 2, the direction electrode plates 6 and the insulating part 7 are all arranged on the periphery of the electrode middle tube 1, the electrode spiral guide wire 4 is arranged inside the electrode middle tube 1, the single-core electrode wire 4-1 penetrates out of the electrode middle tube 1 through the middle tube wire hole 1-1, and the single-core electrode wire 4-1 is respectively welded with the annular electrode 3 and the direction electrode plates 6.

The directional electrode slice 6 is welded with the single-core wire electrode 4-1 and then fixed with the electrode middle tube 1 through an adhesive. The insulating part 7 is formed by an injection molding tool for the injection molding ring 7-1. The injection molding ring 7-1 is made of TPU, medical epoxy resin, medical silica gel and implantable plastic.

Referring to fig. 9, the two sides of the direction electrode plate 6 are provided with fixing wings 6-3, so that the direction electrode plate 6 is in a boss shape as a whole.

Referring to fig. 10, the two sides of the direction electrode plate 6 are provided with fixing wings 6-3 in an inner buckle shape, so that the direction electrode plate 6 is in a C-like shape as a whole.

The implantable directional stimulating electrode of the present invention, first, a ring electrode 3 is welded; welding the direction electrode plate 6; then sleeving an injection molding tool on the directional electrode to be injection molded, and performing injection molding on the injection molding ring 7-1; after the injection molding ring 7-1 is subjected to injection molding, the directional electrode plate 6 is subjected to cleaning or grinding and other processes, so that the surface of the directional electrode plate 6 is exposed and is not covered by the insulating part 7.

Wherein, the annular electrode 3 is welded, a spiral electrode guide wire 4 wound in a spiral shape is penetrated into the electrode middle tube 1, and the electrode middle tube 1 is penetrated into the electrode outer tube 5;

a small hole is punched in the electrode middle tube 1, a single-core wire electrode 4-1 is led out from the electrode spiral guide wire 4 at will, and the annular electrode 3 is welded with the led-out single-core wire electrode 4-1;

and (3) penetrating the insulating ring 2 and the welded annular electrode 3 outside the electrode middle tube 1, and bonding by using an adhesive to firmly fix the insulating ring 2 and the annular electrode 3. The stimulating electrode after welding the ring electrode 3 is shown in fig. 2.

Welding direction electrode plates 6, referring to fig. 2, uniformly arranging 3 middle tube wire holes 1-1 in the radial direction of an electrode middle tube 1, and leading out a single-core electrode wire 4-1 from each middle tube wire hole 1-1;

referring to fig. 3, welding the electrode plate 6 in each direction with a single-core wire electrode 4-1 led out from the central tube wire hole 1-1;

referring to fig. 4, 3 completely welded directional electrode plates 6 are uniformly adhered to the electrode middle tube 1 in the radial direction by using an adhesive, and each directional electrode plate 6 is not contacted.

Referring to fig. 5, the injection molding tool is sleeved on the directional electrode to be injection molded, and injection molding of the injection molding ring 7-1 is carried out;

referring to fig. 6, after the injection molding ring 7-1 is injection molded, the directional electrode sheet 6 is cleaned or ground, so that the surface of the directional electrode sheet 6 is exposed and not covered by the insulating part 7.

The cross-sectional structure of the completed stimulation electrode is schematically shown in fig. 7.

In another embodiment, the electrode plate 6 in the welding direction is formed by uniformly arranging 2 middle tube wire holes 1-1 in the radial direction of the electrode middle tube 1, and each single-core electrode wire 4-1 is led out from each middle tube wire hole 1-1;

welding the electrode plate 6 in each direction with a single-core electrode wire 4-1 led out from the middle tube wire hole 1-1;

2 pieces of completely welded directional electrode pieces 6 are uniformly adhered to the electrode middle tube 1 in the radial direction by using an adhesive, and each directional electrode piece 6 is not contacted.

The cross-sectional structure of the completed stimulation electrode is schematically shown in fig. 8.

In the specific example, both the ring electrode 3 and the welding direction electrode piece 6 were welded, and then both ultrasonic cleaning and plasma treatment were performed.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the utility model, and that, although the utility model has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the utility model as defined by the appended claims.

Claims

1. An implantable directional stimulating electrode is characterized by comprising an electrode middle tube, a middle tube wire hole, an insulating ring, an annular electrode, an electrode spiral guide wire, a single-core electrode wire, an electrode outer tube, a directional electrode plate, an insulating part and an insulating head, wherein,

2. The implantable directional stimulation electrode according to claim 1, wherein: the direction electrode slice is welded with the single-core electrode wire and then fixed with the electrode middle tube through an adhesive.

3. The implantable directional stimulation electrode according to claim 1, wherein: the insulating part is formed by an injection molding tool for the injection molding ring.

4. The implantable directional stimulation electrode according to claim 3, wherein: the injection molding ring is made of TPU, medical epoxy resin, medical silica gel and implantable plastic.

5. The implantable directional stimulation electrode according to claim 1, wherein: and the two sides of the direction electrode plate are provided with fixed wings, so that the direction electrode plate is integrally in a boss shape.

6. The implantable directional stimulation electrode according to claim 1, wherein: and the two sides of the direction electrode slice are provided with fixed wings, so that the direction electrode slice is in a C-like shape as a whole.