JP2011010725A - Electrode for living body - Google Patents

Abstract

A bitter substance is added to a conductive adhesive (bioelectrode gel) used for biomedical electrodes, and children and dementia patients and others are consciously or unconsciously put biomedical electrodes in their mouths. A biological electrode capable of preventing accidental ingestion or aspiration by being exhaled when discharged is provided.
A biological electrode comprising a conductive pressure-sensitive adhesive containing a bitter substance and an electrode element material that is electronically conductive and has an electrical connection to the outside.
[Selection] Figure 2

Description

  The present invention relates to an electrode for a living body using a conductive pressure-sensitive adhesive composition that is attached to the body surface of a living body to derive an electrical phenomenon of the living body, and more particularly, the conductive pressure-sensitive adhesive composition contains a bitter substance. The present invention relates to a biological electrode.

  The following are known as living body electrodes using a conductive pressure-sensitive adhesive composition that is attached to the body surface of a living body to derive an electrical phenomenon of the living body. (See Patent Document 1)

  In the conventional bioelectrode of FIG. 4, there is a non-conductive coating 82 having an opening 83 covered by a snap 84, and an electrode terminal including an eyelid or eyelet 85 projects. The snap 84 is fixed so as to cover the eyelet 85 and provides an electrical connection with the electric meter. The eyelet 85 is electrically connected to the conductive adhesive layer 86, and the snap 84 and the nonconductive coating 82 completely cover the adhesive layer 86 made of the conductive adhesive of the present invention. The release liner 88 is for protecting the adhesive layer 86 before use.

When the biological electrode measures the bioelectric potential, it is necessary to directly contact a part of the living body in order to efficiently extract a weak electric signal and guide it to an electrocardiograph or the like.
However, simply touching the living body electrode element to the living body skin does not electrically connect the living body electrode element and the living body, and the unstable contact between the living body electrode element and the skin causes complex potentials and Impedance occurs, and it is impossible to accurately extract and measure the electrical signal of the living body.
In view of this, a conventional biomedical electrode uses a conductive adhesive (gel) together with a biomedical electrode element to achieve electrical coupling between the living body and the electrode.

JP 2001-181597 A

Since conventional biomedical electrodes are used by connecting the conductive terminals of the biomedical electrodes to the measuring device, they are usually used under the supervision of doctors and nurses. It was not in the design philosophy of the biomedical electrode to have it alone. For this reason, no countermeasures against accidental ingestion have been made to conventional biological electrodes.
However, because of its small size, there is a slight possibility that accidental ingestion of children or patients with dementia consciously or unconsciously will occur.

If a child accidentally swallows a biomedical electrode, an accident such as suffocation occurs.
In addition, if a patient with dementia who is collecting biological information by wearing a biological electrode in a hospital etc. accidentally swallows the biological electrode, the biological information cannot be collected and the accidental ingestion Accidents can occur.

  An object (object) of the present invention is to add a bitter substance to a conductive adhesive (bioelectrode gel) used for a living body electrode, so that a child or a patient with dementia consciously or unconsciously An object of the present invention is to provide a biomedical electrode that can prevent accidental ingestion or aspiration by reflexively exhaling when it is put in the mouth by mistake.

In order to solve the above-mentioned problems, the living body electrode of the present invention is characterized by comprising a conductive pressure-sensitive adhesive containing a bitter substance and an electrode element material that is electronically conductive and has an electrical connection to the outside.
In addition, the bitter substance is made of denatonium benzoate.

According to the biomedical electrode of the present invention, since it is composed of a conductive adhesive containing a bitter substance and an electrode element material that is electronically conductive and has an electrical connection to the outside, children, patients with dementia, etc. However, accidental ingestion or aspiration can be prevented by reflexively exhaling when a biological electrode is accidentally put into the mouth consciously or unconsciously.
Moreover, since the bitterness substance is contained in the conductive adhesive, the conductivity when used as a biological electrode is not impaired.

FIG. 3 is a perspective view of the biomedical electrode of the present invention, in which the conductive adhesive composition 3 is interposed in the hole 2 inside the center of the annular foam tape member 1 in an inclined state from the back. It is the center sectional view seen from the side in the state where FIG. 1 is not inclined. It is the top view which looked at the biomedical electrode of FIG. 1, FIG. 2 of this invention from the direction of the surface 1a. It is a conventional biological electrode, Comprising: It is the sectional drawing.

  The feature of the present invention is that a bitter substance is added to a conductive adhesive (bioelectrode gel), and a child or a patient with dementia evacuates when the bioelectrode is accidentally put into the mouth consciously or unconsciously. Thus, an object of the present invention is to realize a biological electrode that can prevent accidental ingestion or aspiration.

FIG. 1 is a perspective view of a state in which the biomedical electrode of the present invention is tilted when viewed from the back.
In FIG. 1, both surfaces of an annular foam tape member 1 are formed on a front surface 1a and a back surface 1b that can be bonded.
A hole 2 is provided at the center of the foam tape member 1, and a conductive adhesive composition 3 containing a bitter substance is interposed in the hole 2 to constitute a biomedical electrode.
FIG. 2 is a central cross-sectional view of FIG. 1 viewed from the side without tilting.
In FIG. 2, an annular foam tape member 1 that can be bonded is formed by a peripheral surface 1 a and a back surface 1 b, and a sheet-like non-conductive support member 4 having the same diameter as the foam tape member 1 is formed on the back surface 1 b of the foam tape member 1. It is pasted on. From the perforation 5 provided in the vicinity of the center of the non-conductive support member 4, a conductive terminal 6 having a T-shaped flange 61 is located outside the sheet-like non-conductive support member 4 with the flange 61 inside. Is fixed integrally with the non-conductive support member 4 in a state in which is projected.

Since the biomedical electrode of the present invention shown in FIG. 1 is integrally bonded to one back surface of the annular foam tape member 1 with the terminal terminal 62 of the conductive terminal 6 protruding outward, these Since the hole 2 is formed by the non-conductive support member 4 and the annular foam tape member 1, the biomedical electrode is formed by interposing the conductive adhesive composition 3 containing a bitter substance in the hole 2. .
For electrical connection with the living body, a lead wire (not shown) is connected to the terminal terminal 62, and an electrical connection with an external electrocardiograph (not shown) is made via this lead wire.

FIG. 3 is a plan view of the biomedical electrode of FIGS. 1 and 2 as viewed from the surface 1a. As shown in the figure, a stud and an eyelet of the terminal terminal 6 are provided protruding from the center in the center portion.
In this conventional biomedical electrode, the T-shaped ridge 61 can be visually recognized from the direction of the surface 1a of the electrode because the conductive adhesive composition 3 containing the bitter substance is transparent. The surface of the conductive terminal 6 is coated with Ag / AgCl so as to be electrically conductive.

  The means for containing the bitter substance in the conductive pressure-sensitive adhesive composition 3 can be realized by directly mixing the bitter substance in the production of the conductive pressure-sensitive adhesive composition.

  As shown in FIGS. 1 to 3, the shape of the biomedical electrode is formed on the front surface 1 a and the back surface 1 b to which both surfaces of the annular foam tape member 1 can be bonded. It is clear that the shape may be other than the one in which the conductive adhesive composition 3 is interposed in the hole 2.

The bitter substance used in the present invention is at least selected from geraniol, octaacetylated sucrose, phenylethyl alcohol, brucine, linalool, diethyl phthalate, linanol acetate, benzyl acetate, denatonium benzoate, dimethoxtricine and capsaicin. One type.
Among these, denatonium benzoate is particularly preferable.

Next, an example of a biomedical electrode composed of a conductive pressure-sensitive adhesive containing the bitter tastant of the present invention and an electrode element material that is electronically conductive and has an electrical connection to the outside is produced by the following procedure.
(1) In a solution obtained by dissolving 1.7 g of potassium chloride in 20 g of water, 33.2 g of diacetone acrylamide (manufactured by Kyowa Hakko Kogyo Co., Ltd.), methoxynonaethylene glycol acrylate (manufactured by Shin-Nakamura Chemical Co., Ltd., trade name AM90G, R1 = hydrogen, R2 = methyl, n = 9 compound)) 33.2 g and propylene glycol 11 g were added and stirred to make a homogeneous solution.
(2) To this solution, 0.75 g of a 20% ethanol solution of benzyldimethyl ketal (2,2-dimethoxy-2-methylacetophenone) was further added and dissolved uniformly to prepare a precursor solution.
(3) Denatonium benzoate was added to the precursor solution to a concentration of 400 ppm.
(4) The precursor solution is impregnated into a nonwoven fabric placed on a silicon-treated polyester film held horizontally and cast to a thickness of about 1 mm, and polymerized and cured by irradiating with ultraviolet light from a black light under a nitrogen atmosphere. A conductive adhesive composition was obtained.
This thing had moderate adhesive strength with respect to skin.
(5) The biomedical electrode was obtained by injecting the precursor solution into the hole 2 without the conductive adhesive composition 3 of FIG. 2 and irradiating it with ultraviolet rays while keeping it in a nitrogen atmosphere, and curing it.

  When the biomedical electrode manufactured by the above procedure was put in the mouth of a child as a trial, the child exhaled reflexively, and thus a function capable of preventing accidental ingestion or aspiration was confirmed.

DESCRIPTION OF SYMBOLS 1 Foam tape member 1a Front surface 1b Back surface 2 Hole 3 Bitter substance containing conductive adhesive composition 4 Nonelectroconductive support member 5 Perforation 6 Conductive terminal

Claims (2)

  A biomedical electrode comprising a conductive pressure-sensitive adhesive containing a bitter substance and an electrode element material that is electronically conductive and has an electrical connection to the outside. The biological electrode according to claim 1, wherein the bitter substance is made of denatonium benzoate.

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