JPH077923Y2 - Multi-electrode biomedical electrode - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a biomedical electrode used for deriving a weak voltage from a living body. It relates to electrodes.

[Conventional technology]

As is well known, bioelectricity generated in a living body is induced by activities of the heart brain, muscles, and the like.

In particular, with respect to bioelectricity generated in the heart, a weak voltage induced on the skin surface of the living body is recorded by an external electrocardiograph to diagnose a heart abnormality. Further, in this electrocardiograph, in order to electrically connect the input part to the living body, the electrode for the living body must be adhered to the surface of the skin of the living body.

The conventional electrode that is brought into close contact with the surface of the skin will be described with reference to FIGS. 6 and 7. Reference numeral 1 in the figure denotes a biomedical electrode.

This biomedical electrode 1 has a substantially disk-shaped sticking base material 2. As shown in FIG. 7, the adhesive base material 2 has a sticky surface 2a as shown in FIG. 7 in order to bring the biomedical electrode 1 into close contact with the skin surface M of the living body. In addition, the opening 3 is formed by notching the central portion thereof.

As shown in FIG. 6, a lead wire connection hook 4 is joined to the upper surface side (front surface side) of the adhesive base material 2 to close the opening 3. The lead wire connecting hook 4 has a lead wire joint portion 4a projecting from the upper surface thereof, and a plate-like electrode portion 5 made of Ag-Agcl connected to the lower surface thereof as shown in FIG. A lead wire connecting body 7 to which a lead wire 6 is connected as shown in FIG. 8 is connected to the projecting lead wire connecting portion 4a, and the other end of the lead wire 6 is an electrocardiograph (not shown). No)
It is connected to the.

[Problems to be solved by the invention]

To record an electrocardiogram using the biomedical electrode 1 having the above-described structure, first, as shown in FIG.
The adhesive base material 2 of No. 1 is adhered to the skin surface M of the living body, and then the fitting groove 7a of the lead wire connecting body 7 is connected to the lead wire connecting hook 4 of the biomedical electrode 1 so as to project. The lead wire connection body 7 is connected to the biomedical electrode 1 by being fitted to the portion 4a, and the weak voltage derived from the electrode portion 5 is recorded on the electrocardiograph (not shown) via the lead wire 6. To do.

Alternatively, the lead wire connecting body 7 is joined by fitting the fitting groove 7a of the lead wire connecting body 7 into the lead connecting portion 4a provided in advance on the lead wire connecting hook 4 of the biomedical electrode 1. The biomedical electrode 1 may be closely attached to the skin surface M of the living body to record an electrocardiogram.

By the way, although the electrocardiogram can be measured by any of the methods as described above, such a biomedical electrode 1 is almost always discarded once it is measured. However, the electrode part 5 of the biomedical electrode 1 uses an expensive metal such as Ag-Agcl as described above. In addition, the electrode portion 5 that directly derives the weak voltage from the living body and the lead wire connection body 7 and the lead wire 6 (that is, the circuit portion) that guides the voltage derived by the electrode portion 5 to the electrocardiograph are separate parts, and therefore, are assembled. There is a problem that the process is complicated and the manufacturing cost is high. Therefore, as described in Japanese Utility Model Application Laid-Open No. 59-26604, a biomedical electrode in which an electrode part, a connector part, a lead part and the like are printed on a substrate has been developed.

However, since the substrate of this invention is formed of a polyamide-based synthetic resin, it has the drawbacks of feeling cold and having a poor feel on the skin, and being unsuitable for living organisms. The development of electrodes was held.

Further, as shown in FIG. 9, when measuring an electrocardiogram, not only the electrode 1 is attached to only one place on the skin surface M of the body, but also two places, three places, or recently 10 places.
It may be attached to 0 or more places.

When the number of attachment points increases, the electrode 1 and the lead wire 6
In the conventional electrode in which and are separated and independent, one lead wire 6 is connected to each electrode 1, so that it takes a long time to attach a large number of electrodes 1 to the skin surface M, and it is troublesome. Since the lead wire 6 is placed on the skin surface M of the living body, the subject unconsciously pulls the lead wire 6 during the electrocardiogram measurement, and as a result, the electrode 1 falls off from the skin surface M of the living body. was there.

Further, in the case of a seriously ill patient, the biomedical electrode 1 must also be attached to the back, so that a seriously ill patient in a recumbent state hits his / her back with the biomedical electrode 1 and is used conventionally. The living body electrode has a drawback that it does not fit into the living body.

[Means for solving problems]

Therefore, the present invention has been made in view of the above problems, in which an electrode portion and a circuit portion formed by impregnating a knitted fiber-made sticking base material with a liquid conductive substance by printing are formed. At least provided, a large number of this electrode portion is arranged on the adhesive substrate,
A multi-electrode biomedical electrode, wherein the circuit section is connected to each of the electrode sections, and an insulating adhesive is applied so that the circuit section can adhere to a living body.

The object is to solve the above problems by providing means.

[Action]

In the above configuration, when the electrode parts of a large number of biomedical electrodes are brought into contact with the skin surface of the living body and the adhesive of the adhesive base material is brought into contact with the skin surface of the living body, the weak voltage in the living body is derived from the electrode parts. It is guided from the circuit section to the electrocardiograph, and the electrocardiogram is recorded.

〔Example〕

Hereinafter, how the structure of the present invention is practically embodied will be described with reference to the drawings.

FIG. 1 is a perspective view of a biomedical electrode according to an embodiment of the present invention,
FIG. 2 is a sectional view of the biomedical electrode of FIG.
Is a multi-electrode biomedical electrode.

The biomedical electrode 10 has an adhesive substrate 11. The adhesive base material 11 has a rectangular knit shape and uses fibers. Reference numeral 12 is an electrode portion for deriving a weak voltage from the living body.

This electrode portion 12 is a paste or ink, that is, a liquid mixture of silver or a mixture of silver and silver chloride, a mixture of silver and conductive graphite, or graphite as conductive metal powder, which is mixed with a resin and a solvent. The conductive ink, which is a conductive substance, is printed or impregnated on the adhesive base material 11 to bring them into close contact.

The sticking substrate 11 on which the conductive ink is printed or impregnated is porous because it is a knitted substance as shown in FIG. 3, and therefore the adhesion of the conductive ink is good,
It also has a low electric resistance value.

This conductive ink is printed or impregnated on the sticking base material 12 to form the electrode parts 12, 12, 12, and at the same time, the conductive ink is linearly printed or impregnated on the sticking base material 3 to form three electrodes. Part 12, 12,
Circuit parts 13, 13, 13 are formed to connect to each of the 12, and the other end is connected to the connector 16 (Fig. 5). In the present embodiment, the case where three electrode portions 12 and three circuit portions 13 are provided has been described, but the number of electrode portions 12 and the number of circuit portions 13 are not limited to three.

In this way, by simply printing and impregnating the conductive substrate 11 with the conductive ink, the electrode portion 12 and the circuit portion 13 can be simultaneously formed integrally, and as a result, the electrode portion 12 and the circuit portion 13 are separately formed. Since it is not manufactured, the biomedical electrode can be manufactured at low cost, and since the circuit portion 13 does not appear outside the adhesive base material 11 formed inside the adhesive base material 11, the subject Does not unintentionally pull during ECG measurement.

Reference numeral 14 is an insulating agent that insulates the circuit portion 13, and 15 is an adhesive base material 11
Is an adhesive for sticking to the skin surface M of a living body as shown in FIG.

Next, the usage of the multi-electrode type biomedical electrode 10 having the above structure will be explained. As shown in FIG. 5, the multi-electrode type biomedical electrode 10 has its electrode portion 12 with cream or the like on the skin surface M of the body. When the adhesive 15 of the adhesive base material 11 is brought into close contact with the skin surface, the weak voltage in the living body is derived from the electrode part 12 and guided to the electrocardiograph (not shown) by the circuit part 13 to record an electrocardiogram. can do.

In this case, a large number of electrode parts 12 and circuit parts are formed on one adhesive substrate 11.
Since 13 is provided, a large number of electrode parts 12 and circuit parts 13 can be adhered to the skin surface M of the living body at a time only by adhering the adhesive base material 11 to the skin surface of the living body. It is possible to shorten the mounting time for the skin surface M of the living body.

[Effect of device]

As described above, according to the present invention, the electrode portion and the circuit portion can be formed by printing and impregnating the knitted fibrous adhesive base material with the liquid conductive substance, so that the biomedical electrode can be manufactured at low cost.

Further, since the electrode portion and the circuit portion can be integrally formed by printing and impregnating a liquid conductive material, the assembly process becomes efficient and an electrode having stable electrical characteristics can be obtained.

Furthermore, since a large number of electrodes and a large number of circuits that are connected to each of these electrodes are provided on the adhesive substrate, multiple electrodes can be attached to the skin surface of the living body in a short time, improving wearability. To do.

In addition, since a knitted fibrous substance is used as the sticking substrate, it is easily impregnated with the liquid conductive substance and has good fit to the skin.

In addition, since the circuit part is formed by printing and impregnating a liquid conductive substance, the circuit part itself is not contained in the adhesive base material and is not exposed to the outside of the adhesive base material. There is no possibility of pulling the circuit part and dropping the multi-electrode type electrode from the skin surface of the living body.

In addition, since the biomedical electrode is to be in close contact with the living body,
Since the flexible knitted fibrous substance is used as the adhesive base material, it easily fits on the skin surface, and thus the skin surface can be protected.

In addition, since the biomedical electrode is adapted to the flexible skin surface, it is necessary to flexibly deform the substrate surface of the biomedical electrode that is in contact with the skin surface with respect to the skin surface. Since, when the deformation of the skin surface,
There is an effect that it is possible to prevent the printed electrodes and lead wires from easily falling off the substrate.

[Brief description of drawings]

FIG. 1 is a perspective view of a multi-electrode biomedical electrode according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a knitted fiber-made adhesive substrate. Fig. 4 is a perspective view of the material, Fig. 4 is a plan view of Fig. 1, Fig. 5 is an explanatory view of using the multi-electrode biomedical electrode of the present invention, Fig. 6, Fig. 7, Fig. 8 and Fig. 9 are It is explanatory drawing of the conventional biomedical electrode. 10 ... Multi-electrode type biomedical electrode, 11 ... Knitted fiber adhesive base material, 12 ... Electrode part, 13 ... Circuit part, 14 ... Insulating agent, 15
…… Adhesive.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Soichi Nagata 2-35-8 Hongo, Bunkyo-ku, Tokyo Fukuda Denshi Hongo Office (72) Inventor Tadaharu Shimizu 2-35-8 Hongo, Bunkyo-ku, Tokyo Fukuda Electronic Hongo Office (72) Inventor Shinchi Ichida 3-4-8 Kanda, Chiyoda-ku, Tokyo (Takabun Building) Daido Sangyo Co., Ltd. (56) Reference JP-A-54-53264 (JP, A) 59-26604 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A knitted fiber-attached base material is provided with at least an electrode portion and a circuit portion formed by printing impregnation of a liquid conductive substance, and a large number of the electrode portions are provided on the base material. A multi-electrode biomedical electrode, characterized in that individual electrodes are arranged, the circuit part is connected to each of the electrode parts, and an insulating adhesive is applied so that the circuit part can be adhered to a living body.