Parallel bipolar stimulating electrode

Abstract

The utility model discloses a parallel bipolar stimulating electrode, which comprises an electrode terminal, a circuit board and two electrode wires which are electrically connected in sequence, one end of the electrode terminal, the circuit board and one ends of the two electrode wires are wrapped by a shell, the two electrode wires are arranged side by side and are adjacent to each other, and the two electrode wires are arranged in parallel and are adjacent to each other. The surface of the electrode wire is covered with an insulating layer, and the insulating layer is removed at the end of the electrode wire to form an exposed point. Compared with two concentric electrode wires, although the total sectional area of the two side-by-side electrode wires is not changed, the two side-by-side electrode wires slightly extrude and cut surrounding tissues during implantation, and the electrode wire is particularly suitable for small animal models, and is low in manufacturing difficulty and high in strength and toughness.

Description

Technical Field

[0001] This utility model relates to the field of microwire electrodes, specifically to a parallel bipolar stimulation electrode. Background Technology

[0002] Deep brain stimulation commonly uses concentric stimulation, which requires inserting a thin filament into a hollow tube. This necessitates the simultaneous implantation of two filaments, resulting in a larger cross-sectional area. Consequently, the stiffness of the electrode filaments needs to be increased, making the electrodes very thick and potentially causing significant damage to small animals.

[0003] In addition, it is very difficult to ensure that the filament and the hollow tube are completely concentric. If the filament is too small relative to the hollow tube, it will lead to non-concentricity. If the filament is close to the inner diameter of the hollow tube, it will be difficult to insert the filament, which will increase the cost.

[0004] Therefore, it is essential to design a minimally invasive electrode that can penetrate deep into tissues to provide long-term nerve signal stimulation. Utility Model Content

[0005] The purpose of this invention is to provide a parallel bipolar stimulation electrode to solve the problems of traditional concentric stimulation electrodes used for deep brain stimulation, which have a large diameter, cause significant damage to small animals, and are difficult to produce and costly.

[0006] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution:

[0007] A parallel bipolar stimulation electrode includes: an electrode terminal, a circuit board, and two electrode wires that are sequentially and electrically connected. One end of the electrode terminal, the circuit board, and one end of the two electrode wires are enclosed in a housing. The two electrode wires are arranged side by side and close to each other. The surface of the electrode wires is covered with an insulating layer. The insulating layer is removed at the ends of the electrode wires to form exposed points.

[0008] Furthermore, the end face of each of the electrode wires is a bevel.

[0009] In another embodiment, the two electrode wires are arranged side by side, with their end faces at the same height and facing opposite directions, so that the ends of the two electrode wires form a sharp isosceles triangle shape.

[0010] In another embodiment, the two electrode wires are arranged with stepped end faces, the end faces of the two electrode wires face the same direction and are located in different planes, and the end of one electrode wire is higher than the end of the other electrode wire.

[0011] Furthermore, the two electrode wires are arranged with parallel end faces, the end faces of the two electrode wires face the same direction and are located in the same plane, and the end face of one electrode wire is higher than the end face of the other electrode wire.

[0012] Furthermore, the housing is a shaping agent, and one end of the electrode terminal, the circuit board, and one end of the two electrode wires are wrapped inside by the shaping agent.

[0013] In another embodiment, the housing is a rigid tube, and the circuit board and one end of the two electrode wires are wrapped inside the rigid tube. One end of the electrode terminal is connected to the circuit board via a red and black lead wire.

[0014] Furthermore, the rigid tube is made of stainless steel.

[0015] Furthermore, one end of the electrode terminal is a solid round tube with rounded corners on the end face.

[0016] Furthermore, the other end of the electrode terminal is a hollow ring with a groove, the groove forming a first sector ring and a second sector ring coaxially connected at the end of the electrode terminal, the second sector ring being far from the center of the electrode terminal, and the central angle of the second sector ring being greater than that of the first sector ring.

[0017] Compared with the prior art, this application has the following advantages:

[0018] A parallel bipolar stimulation electrode is provided. Compared with two concentric electrode wires, although the total cross-sectional area of ​​the two parallel electrode wires is unchanged, the two parallel electrode wires cause less compression and cutting to the surrounding tissues during implantation. It is especially suitable for small animal models, and is easy to manufacture with high strength and toughness. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of three different end structures of the electrode wire in the first embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0023] Figure 4 This is a perspective view of the electrode terminals of the second embodiment of the present invention;

[0024] The labels in the diagram represent the following:

[0025] 1-Electrode terminal; 11-Upper section; 12-Lower section; 13-Groove; 14-First sector ring; 15-Second sector ring; 2-Circuit board; 3-Electrode wire; 4-Fixing agent; 5-Rigid tube; 6-Conducting red and black wires; 61-Heat shrink tubing. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] To design a minimally invasive electrode that can penetrate deep into tissues for prolonged nerve signal stimulation, a parallel bipolar stimulation electrode is provided below. This electrode aims to reduce damage to the recipient tissue, is suitable for prolonged and deep-penetrating nerve signal stimulation, and avoids the problem of difficulty in ensuring the concentricity of the electrode wire 3 and the hollow tube, thereby improving the precision and accuracy of the electrode while reducing manufacturing and usage costs.

[0028] (First embodiment)

[0029] Combination Figure 1 , Figure 1 Parallel bipolar stimulation electrodes for chronic bipolar stimulation were presented.

[0030] The parallel bipolar stimulation electrode includes: electrode terminals 1, a circuit board 2, and two electrode wires 3 connected in sequence electrically. Figure 1 The electrode terminal 1 and circuit board 2 are not shown. One end of the electrode terminal 1, the circuit board 2 and one end of the two electrode wires 3 are wrapped inside by a shaping agent 4. The two electrode wires 3 are arranged side by side and close to each other. The surface of the electrode wires 3 is covered with an insulating layer. The insulating layer is removed at the end of the electrode wires 3 to form an exposed point.

[0031] Compared to two concentric electrode wires 3, although the total cross-sectional area of ​​the two parallel electrode wires 3 remains unchanged, the two parallel electrode wires 3 cause less compression and cutting of surrounding tissues during implantation, making them particularly suitable for small animal models. They are also easier to manufacture and have higher strength and toughness.

[0032] Combination Figure 2 , Figure 2 Three feasible implementations of the electrode wire 3 are presented. In each implementation, the end of the electrode wire 3 is beveled to increase the penetration performance of the electrode wire 3.

[0033] The first implementation method, combined with Figure 2 (A) The two electrode wires 3 are arranged side by side, with the end faces of the two electrode wires 3 at the same height and facing opposite directions, so that the ends of the two electrode wires 3 form a sharp isosceles triangle shape. This design increases the penetration force of the electrode wires 3 acting on the same position at the same time and reduces the requirements for the strength and toughness of the electrode wires 3.

[0034] The second implementation method, combined with Figure 2 (B) The two electrode wires 3 are arranged with stepped end faces. The end faces of the two electrode wires 3 face the same direction and are located on different planes. The end of one electrode wire 3 is higher than the end of the other electrode wire 3. This design reduces the pressure of the electrode wires 3 acting on the same position at the same time, and further reduces tissue damage.

[0035] The third implementation method, combined with Figure 2 (C) The two electrode wires 3 are arranged with parallel end faces. The end faces of the two electrode wires 3 face the same direction and are located in the same plane. The end face of one electrode wire 3 is higher than the end face of the other electrode wire 3. This design increases the penetration force of the electrode wires 3 acting on the same position at the same time, while reducing the pressure of the two electrode wires 3 acting on the same position.

[0036] (Second Embodiment)

[0037] Combination Figure 3 , Figure 3 Parallel bipolar stimulation electrodes for acute bipolar stimulation were presented.

[0038] The parallel bipolar stimulation electrode includes: an electrode terminal 1, a circuit board 2, and two electrode wires 3 connected in sequence. The circuit board 2 and one end of the two electrode wires 3 are wrapped inside a rigid tube 5. One end of the electrode terminal 1 is connected to the circuit board 2 through a red and black lead wire 6. The two electrode wires 3 are arranged side by side and close to each other. The surface of the electrode wires 3 is covered with an insulating layer. The insulating layer is removed at the end of the electrode wires 3 to form an exposure point.

[0039] Specifically, the rigid tube 5 can be made of stainless steel. The electronic terminals and the circuit board 2 are connected by red and black leads 6. Each electrode terminal 1 is connected to the black end or red end of the red and black leads 6 by a heat shrink tubing 61. The red and black leads 6 are connected to the circuit board 2 by structural adhesive. The circuit board 2 and the rigid tube 5 are connected as one unit by structural adhesive.

[0040] Each electrode terminal 1 is a stepped tube, comprising an upper section 11 and a lower section 12. The upper section 11 is a solid round tube with rounded end faces and a diameter of 0.8 mm. The upper section 11 is used to connect external devices. The lower section 12 is a hollow ring with a groove 13. The groove 13 of the hollow ring is designed to facilitate welding or riveting and is used to connect the red and black lead wires 6.

[0041] The groove 13 can be T-shaped, so that the lower section 12 forms a first sector ring 14 and a second sector ring 15 coaxially connected. The first sector ring 14 is coaxially fixedly connected to the upper section 11. The central angle of the second sector ring 15 is larger than that of the first sector ring 14. After the end of the red and black lead wire 6 is inserted into the interior of the first sector ring 14 and the second sector ring 15, the second sector ring 15 is clamped with pliers to plastically deform the second sector ring 15 inward, thereby fixing the end of the red and black lead wire 6 to the electrode terminal 1.

[0042] Compared to the first embodiment, the two electrode wires 3 are wrapped in a rigid tube 5. The rigid tube 5 has high strength and high toughness, which can effectively fix the electrode wires 3 and provide good mechanical protection for the electrode wires 3 during implantation and operation, preventing them from deforming or shifting during implantation, ensuring the stability and accuracy of the electrode wires 3, and reducing the breakage or damage of the electrode wires 3 caused by external stress or impact.

[0043] Furthermore, the shape and height of the end of the electrode wire 3 in the second embodiment are the same as those in the first embodiment.

[0044] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of this utility model.

Claims

1. A parallel bipolar stimulation electrode, characterized in that, include: The electrode terminals, circuit board, and two electrode wires are sequentially electrically connected. One end of the electrode terminals, the circuit board, and one end of the two electrode wires are enclosed in a housing. The two electrode wires are arranged side by side and close to each other. The surface of the electrode wires is covered with an insulating layer. The insulating layer is removed at the ends of the electrode wires to form exposed points.

2. The parallel bipolar stimulation electrode according to claim 1, characterized in that, Each of the electrode wires has a beveled end face.

3. A parallel bipolar stimulation electrode according to claim 2, characterized in that, The two electrode wires are arranged side by side, with their end faces at the same height and facing opposite directions, so that the ends of the two electrode wires form a sharp isosceles triangle shape.

4. A parallel bipolar stimulation electrode according to claim 2, characterized in that, The two electrode wires are arranged with stepped end faces, the end faces of the two electrode wires face the same direction and are located in different planes, and the end of one electrode wire is higher than the end of the other electrode wire.

5. A parallel bipolar stimulation electrode according to claim 2, characterized in that, The two electrode wires are arranged with parallel end faces, the end faces of the two electrode wires face the same direction and are located in the same plane, and the end face of one electrode wire is higher than the end face of the other electrode wire.

6. A parallel bipolar stimulation electrode according to any one of claims 1-5, characterized in that, The housing is a shaping agent, and one end of the electrode terminal, the circuit board, and one end of the two electrode wires are wrapped inside by the shaping agent.

7. A parallel bipolar stimulation electrode according to any one of claims 1-5, characterized in that, The housing is a rigid tube, and the circuit board and one end of the two electrode wires are wrapped inside the rigid tube. One end of the electrode terminal is connected to the circuit board through a red and black lead wire.

8. A parallel bipolar stimulation electrode according to claim 7, characterized in that, The rigid tube is made of stainless steel.

9. A parallel bipolar stimulation electrode according to claim 7, characterized in that, One end of the electrode terminal is a solid round tube with rounded corners on the end face.

10. A parallel bipolar stimulation electrode according to claim 7, characterized in that, The other end of the electrode terminal is a hollow ring with a groove. The groove forms a first sector ring and a second sector ring coaxially connected at the end of the electrode terminal. The second sector ring is far from the center of the electrode terminal, and the central angle of the second sector ring is greater than that of the first sector ring.

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