JPH0327609Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The present invention relates to a biological electrode pad, and more specifically, when measuring electrocardiograms etc. using a jig for clamping limbs, The present invention relates to a biological electrode pad that is securely fixed and can be used repeatedly without contaminating the skin surface.

<Prior Art> Measurement of electrical signals from the biological surface, such as electrocardiograms and electroencephalograms, is carried out by bringing metal electrodes connected to an external recording device into contact with the skin surface. At this time, it is necessary to reduce the electrical noise generated during measurement by increasing the adhesion to the skin surface, and to ensure stable electrical signal transmission. Usually, a paste-like conductive cream is applied to the skin surface. It is applied to. However, in this case, since the cream adheres to and remains on the electrode surface of the skin, it is necessary to remove the cream after the measurement is completed, which is extremely troublesome in cases such as mass medical examinations.

In recent years, biological electrodes using conductive hydrogel sheets have been proposed as an alternative to conductive creams, and these electrodes have excellent effects in terms of stable transmission of electrical signals and non-contamination of the skin surface. It is something.

<Problems to be solved by the invention> However, although the biological electrode using the hydrous gel sheet described above has excellent adhesion and adhesion to the skin surface due to its flexibility and skin followability, it is difficult to fix the hydrous gel sheet. The adhesion to the metal electrode, for example, the metal electrode part of a clip-shaped limb clamping jig, is not sufficient, and it may fall off after repeated use.

<Means for Solving the Problems> The present invention was devised to solve the above problems. The present invention provides an electrode pad for biological use, which is made by removing the central region of the hydrous gel-mounted part of the adhesive sheet to expose the hydrous gel, so that the adhesive fixation of the metal electrode and the hydrous gel sheet is ensured. Moreover, it is capable of transmitting stable electrical signals without falling off even after repeated use.

The present invention will be specifically explained below using the drawings.

1 and 2 show an example of the biological electrode pad of the present invention, with FIG. 1 showing a plan view and FIG. 2 showing a sectional view taken along the line -' in FIG. In FIG. 1, 1 is an adhesive sheet for fixing a conductive hydrogel sheet 2 to a metal electrode, and the conductive hydrogel sheet 2 is placed approximately in the center of the adhesive sheet 1.
The sheet 1 has an opening in the central area of the mounting portion as a cutout area A that is smaller than the gel surface.

The removed area A is the one in which the hydrous gel sheet 2 is exposed in the living body electrode pad of the present invention, and the exposed surface and the skin surface are brought into close contact with each other to stably transmit electrical signals from within the living body to the metal electrode. .

Figures 3 and 4 show other examples of the biological electrode pad of the present invention, where Figure 3 is a plan view and Figure 4 is a cross-sectional view taken along the line -' in Figure 3. A reinforcing sheet 3 made of paper, nonwoven fabric, woven fabric, knitted fabric, net, etc. is interposed inside the water-containing gel sheet 2, and the ends of the sheet 3 are made to protrude and are bonded to the adhesive layer 1'. , it is possible to securely fix the hydrogel sheet 2 to the adhesive sheet 1, increase the internal cohesive force of the hydrogel sheet 2, and prevent it from remaining when removed from the metal electrode.

It is necessary to provide the reinforcing sheet 3 so as not to impair the conductivity of the hydrous gel sheet 2, and it is preferable to interpose the reinforcing sheet 3 in a state in which the hydrous gel sheet 2 is impregnated with the reinforcing sheet 3.

In addition to forming the cutout area A as an opening as shown in FIG. 1, the adhesive sheet 1 is completely divided into two sheets as shown in FIG. 3, and each sheet is joined with a hydrous gel sheet 2. It is also possible to provide one.

The conductive water-containing gel sheet 2 used in the present invention has shape retention properties and is gelled to have an appropriate internal cohesive force, such as polyacrylic acid or its salt, sodium alginate, polyvinyl alcohol, polyvinyl Hydrogels mainly composed of water-soluble polymers such as pyrrolidone, polyacrylamide, carboxymethyl cellulose or its salts, gelatin, hydrophilic polyurethane, etc. can be used, and a crosslinking agent is used to increase the internal cohesive force. A crosslinking treatment can also be performed by.

Furthermore, in order to maintain the conductivity of the hydrogel sheet 2 for a long time or to exhibit good conductivity, polyhydric alcohols such as glycerin and electrolytes such as sodium chloride and potassium chloride can be contained. .

The biomedical electrode pad of the present invention has the above structure, but the gel surface and adhesive surface are covered with a release liner to prevent contamination of the metal electrode and the surface that comes into contact with the skin during storage. It is desirable to keep it.

When using the biological electrode pad of the present invention, the conductive hydrogel sheet 2 is pasted and fixed to a metal electrode connected to an external recording device using the adhesive layer 1' of the adhesive sheet 1, and the cut area is The hydrogel surface exposed by A is brought into contact with the skin surface. Since the biological electrode pad is fixed to the metal electrode by the adhesive force of the adhesive sheet 1, it can be easily peeled off from the skin surface after measurement, and can be easily attached and detached and used repeatedly.

<Effects of the invention> As described above, according to the biological electrode pad of the present invention, the adhesive sheet securely fixes it to the metal electrode, so it can prevent it from falling off during repeated use. Since the central area of the conductive hydrogel sheet-mounted area of the adhesive sheet is removed to expose the hydrogel, there is no transfer or residue of hydrogel on the skin surface, making it easy to perform measurements during mass medical examinations, etc. becomes very simple.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an example of the biological electrode pad of the present invention, FIG. 2 is a sectional view taken along the line -' in FIG. 1, FIG. 3 is a plan view of another example, and FIG. 3 shows a sectional view taken along the line -' in FIG. 1... Adhesive sheet, 2... Conductive hydrogel sheet, 3... Reinforcement sheet.

Claims (1)

[Claims for Utility Model Registration] (1) A bioelectrode pad in which a conductive hydrous gel sheet is mounted approximately at the center of the adhesive surface of an adhesive sheet, wherein the hydrous gel mounting portion of the adhesive sheet lacks the central region. A biological electrode pad made by exposing a hydrous gel. (2) The biological electrode pad according to claim 1, wherein the conductive hydrogel sheet is reinforced with a reinforcing sheet.