Disposable self-adhesive flexible skin electrode for electrooculogram physiological potential detection

Abstract

The disposable self-adhesion flexible skin electrode can be applied to laboratories and clinics and used for detecting the electrophysiological potential of the eyes, is convenient to wear, enables a detected person to be safe and comfortable and is more environmentally friendly, and long-time stable signal conduction can be obtained more easily. The disposable self-adhesive flexible skin electrode is composed of a signal sensing part and a signal transduction part which can be separated, and a signal sensing piece of the signal sensing part is of a three-layer structure. The silver-silver chloride printing coating is located between a skin sticking layer made of a liquid-free ion conductive elastomer material and an insulating layer formed by precisely sticking an anti-seismic silica gel film, and the electrode handle is arranged on the side edge of the signal sensing sheet; one end of a lead wire of the signal conduction part is provided with a signal conduction socket, the other end of the lead wire is detachably connected to the electrode handle through a metal clamp, the head of the metal clamp is in a flat rectangular shape, an inner layer made of conductive metal is arranged in the metal clamp, and the outer portion of the metal clamp is coated with a Teflon insulating coating.

Description

Technical Field

[0001] The utility model relates to the technical field of skin electrodes for detecting eye electrophysiological potentials (including ERG, EOG, VEP, etc.), and in particular to a disposable self-adhesive flexible skin electrode for detecting eye electrophysiological potentials. Background Art

[0002] As a weak human electrical signal, the electrooculographic signal is more difficult to collect than other weak human electrical signals such as EEG and ECG. Since the amplitude of the electrooculographic potential is extremely low and the appearance of the eye is affected by the shape of the orbital zygomatic bones and is not very flat, it is very difficult to fix the electrode. At the same time, the acquisition of electrooculographic signals is also greatly affected by common mode interference such as power frequency noise.

[0003] Traditional electrophysiological skin electrodes are silver-silver chloride metals. During testing, a large amount of conductive paste needs to be applied inside the electrodes to stick the metal electrodes to the skin surface of the subject. However, due to the considerable weight of metal electrodes relative to the eye testing site, as well as the rigidity and non-deformability of the electrode material, there are disadvantages in actual application, such as difficulty in closely attaching the electrodes and unstable potential signals. The application of traditional electrophysiological skin electrodes is extremely limited, especially when used in subjects with difficulty in cooperation (such as infants, intellectually disabled people, etc.). In addition, due to the high cost of metal electrodes, they cannot be discarded once, and electrode disinfection is also extremely difficult, so the risk of disease transmission is inevitable during use.

[0004] In addition, the adhesive layer of the existing self-adhesive electroocular physiological skin electrodes is mostly hydrogel, which has the disadvantages of easy evaporation of water and difficulty in preservation. If ion gel is used, there are disadvantages of leakage and possible toxicity. Finally, at the end-of-life stage, the electrode part and the conductive part are integrated. When the electrode is discarded, the conductive wire is also discarded, which increases costs and environmental pollution.

[0005] Therefore, there is still a need for improvement of existing ocular electrophysiological skin electrodes. Summary of the invention

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a disposable self-adhesive flexible skin electrode for ocular electrophysiological potential detection, which is easy to wear, easier to obtain long-term stable signal conduction, safe and comfortable for the subject, more environmentally friendly, and can be used for laboratory and clinical applications.

[0007] The purpose of this utility model is achieved through the following technical solutions:

[0008] A disposable self-adhesive flexible skin electrode for ocular electrophysiological potential detection is composed of a detachable signal sensing part and a signal conducting part. The signal sensing part includes: a signal sensing sheet and an electrode handle. The signal sensing sheet is a flat sheet-shaped composite structure with smooth edges. The sheet-shaped composite structure includes a three-layer structure of a skin adhesive layer, a metal conductive layer, and an insulating layer. The skin adhesive layer is made of a liquid-free ion conductive elastomer material. The metal conductive layer is screen-printed on the inner surface of the insulating layer so that the silver-silver chloride printed coating is located between the skin adhesive layer and the insulating layer. The insulating layer is a precision-adhesive anti-vibration silicone film. The electrode handle is arranged on the side of the signal sensing sheet. The signal conducting part includes: a lead wire, one end of which is provided with a signal conducting socket, and the other end of the lead wire is detachably connected to the electrode handle through a metal clip. The head of the metal clip is a flat rectangular shape. The inside of the metal clip has an inner layer made of conductive metal, and the outside of the metal clip is coated with a Teflon insulating coating.

[0009] The disposable self-adhesive flexible skin electrode for ocular electrophysiological potential detection as described above uses a liquid-free ion conductive elastomer material, which is a new type of material that has gradually attracted the attention of the industry in recent years. Due to its antifreeze and anti-drying properties, it has become a good substitute for hydrogel ion conductors. At present, it has a variety of known preparation methods, and new preparation technologies and products are still being developed. For example, in Chinese patent application CN116789895A, a variety of methods for preparing liquid-free ion conductive elastomers are disclosed. Since how to prepare liquid-free ion conductive elastomers or the improvement of liquid-free ion conductive elastomers themselves do not belong to the problems to be solved by the utility model, these specific preparation methods are not described here. The utility model uses a liquid-free ion conductive elastomer material obtained by a known preparation method, or directly purchased from the market.

[0010] The disposable self-adhesive flexible skin electrode for ocular electrophysiological potential detection proposed by the utility model improves the design of the disposable flexible skin electrode for ocular electrophysiological potential detection compared with the prior art, adopts a new material such as liquid-free ion conductive elastomer as the skin adhesive layer, the physical and chemical properties are more stable, and the self-adhesive property can be closely adhered to the skin and is not easy to fall off, so as to obtain a more stable bioelectric signal, and at the same time, the silver-silver chloride coating is printed between the skin adhesive layer and the insulating layer of the flexible insulating layer, and a safe, non-toxic and reusable precision adhesive anti-vibration silicone film is added as the insulating layer, which is also very friendly to infants and children and people with sensitive skin; the electrophysiological sensing part and the conduction part are designed separately, and a metal clip of a special shape is used for connection, so that the sensing electrode part in contact with the skin can be used once, and the metal clip and the lead wire can be used repeatedly, so that the production and use costs are reduced and disposable clean application is realized, and environmental pollution is reduced, it is convenient to wear, and it is easier to obtain long-term stable signal conduction, the subject is safe and comfortable, and it is more environmentally friendly.

[0011] The signal sensing sheet is a circular sheet-shaped composite structure, preferably with a diameter of about 1 cm. The signal sensing sheet can also be designed as a rectangular or square sheet-shaped composite structure according to actual use requirements.

[0012] Wherein, an anti-slip structure, such as a raised dot matrix or strip, is provided on the tail of the metal clip to facilitate operation to open or close the head of the metal clip.

[0013] The disposable self-adhesive flexible skin electrode for eye electrophysiological potential detection proposed by the utility model can fit more closely with the skin, avoid signal interference and electrode shedding, and has certain advantages, which will make the acquisition of electrophysiological signals more convenient, stable and safe. In addition, the safety to the human body is taken into consideration and the disposable design can avoid cross infection caused by detection contact, so it has application and promotion significance in laboratories and clinics. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a structural schematic diagram of a preferred embodiment of a disposable self-adhesive flexible skin electrode for detecting eye electrophysiological potential.

[0015] Figure 2 yes Figure 1 The cross-sectional structure diagram of the signal sensing sheet of the embodiment shown in FIG. 1 is a schematic diagram of the cross-sectional structure of the signal sensing sheet of the embodiment shown in FIG. 1 . For the sake of easy understanding, the skin of the detected point in the detection state is shown in the figure.

[0016] Figure 3 for Figure 1 Schematic diagram of the structure of the signal transmission part of the embodiment shown in FIG.

[0017] Figure 4 for Figure 1 A schematic diagram of the embodiment in use. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The accompanying drawings of the present invention are all in a very simplified form and use non-precise proportions. They are only used to conveniently and clearly assist in explaining the embodiments of the present invention, and are not intended to limit the conditions under which the present invention can be implemented.

[0019] As shown in the figure, the disposable self-adhesive flexible skin electrode 100 is composed of a detachable signal sensing part 1 and a signal conducting part 2. Among them, the signal sensing part 1 includes: a signal sensing sheet 11 and an electrode handle 12. The signal sensing sheet 11 is a flat and rounded-edge circular sheet composite structure with three layers, and the diameter is about 1 cm. The three structural layers are a skin adhesive layer 111, a metal conductive layer 112, and an insulating layer 113. Among them, the skin adhesive layer 111 is made of liquid-free ion conductive elastomer material, and the metal conductive layer 112 is screen-printed on the inner surface of the insulating layer 113 so that the silver-silver chloride printed coating is located between the skin adhesive layer 111 and the insulating layer 113. The insulating layer 113 is a precision adhesive anti-vibration silicone film. The electrode handle 12 is arranged on the side of the signal sensing sheet 11. The signal conducting part 2 includes: a lead wire 21, one end of which is provided with a signal conducting socket 23, and the other end is detachably connected to the electrode handle 12 through a metal clip 22. The metal clip 22 has an inner layer 221 made of conductive metal and is coated with a Teflon insulating coating 222. The head of the metal clip 22 is in a flat rectangular shape so that it can be clamped on the electrode handle 12 without affecting the comfort during use. An anti-slip structure 223 is provided on the tail of the metal clip 22 to facilitate operation to open or close the head of the metal clip. As shown in the figure, it is a strip in this embodiment, and it can also be designed as a raised dot matrix or other anti-slip measures.

[0020] The above description is only a description of the preferred embodiment of the utility model, and does not limit the scope of the utility model. Any changes or modifications made by any ordinary technician familiar with the field based on the technical content disclosed above should be regarded as equivalent effective embodiments and fall within the scope of protection of the technical solution of the utility model.

Claims

1. A disposable self-adhesive flexible skin electrode for detecting ocular electrophysiological potentials, characterized in that: It consists of two parts: a separable signal sensing part and a signal transmission part; in; The signal sensing part comprises: a signal sensing sheet and an electrode handle, wherein the signal sensing sheet is a flat sheet-shaped composite structure with rounded edges, wherein the sheet-shaped composite structure comprises a three-layer structure of a skin adhesive layer, a metal conductive layer, and an insulating layer in sequence, wherein the skin adhesive layer is made of a liquid-free ion conductive elastomer material, wherein the metal conductive layer is screen-printed on the inner surface of the insulating layer so that the silver-silver chloride printed coating is located between the skin adhesive layer and the insulating layer, wherein the insulating layer is a precision-adhesive anti-vibration silicone film, and wherein the electrode handle is arranged on the side of the signal sensing sheet; The signal conduction part includes: a lead wire, one end of which is provided with a signal conduction socket, and the other end of the lead wire is detachably connected to the electrode handle through a metal clip, the head of the metal clip is a flat rectangular shape, the interior of the metal clip has an inner layer made of conductive metal, and the exterior of the metal clip is coated with a Teflon insulating coating.

2. The disposable self-adhesive flexible skin electrode according to claim 1, characterized in that: The signal sensing sheet is a circular, rectangular or square sheet-shaped composite structure.

3. The disposable self-adhesive flexible skin electrode according to claim 1 or 2, characterized in that: The signal sensing sheet is a circular sheet-shaped composite structure with a diameter of 1 cm.

4. The disposable self-adhesive flexible skin electrode according to claim 1, characterized in that: An anti-slip structure is arranged on the tail of the metal clip.

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