JPH0471533B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a living body induction electrode used to detect a weak current from a living body, and in particular to a living body induction electrode that is pressed against the skin surface of a living body to derive a weak current. The present invention relates to a living body induction electrode whose electrode plate is prevented from peeling off from the skin surface of the living body.

[Conventional technology]

As is well known, bioelectricity generated in a living body is induced by the activities of the heart, brain, muscles, etc. In particular, bioelectricity generated in the heart is used to diagnose cardiac abnormalities by recording weak currents induced on the skin of a living body using an external electrocardiograph.

In this electrocardiograph, in order to electrically connect the input section to the living body, the living body's induction electrode must be brought into close contact with the surface of the living body's skin.

Conventional electrodes that are brought into close contact with the surface of the skin will be explained with reference to FIGS. 4, 5, and 6. FIG. 4 is a perspective view of the upper side of the biological induction electrode, and FIG. 5 is a perspective view of the bottom side of the biological induction electrode. In the figure, 1 is the biological induction electrode, and 2 is the central part of the biological induction electrode 1. It is an adhesive base material which is a doughnut-shaped flat plate having a notch 3 formed by cutting it out, and its peripheral edge 4
The lower side is sticky and comes into close contact with the surface of the skin.

As shown in FIG.
is adhered to close the notch 3 of the adhesive base material 2. A lead wire connection hook 6 is provided through the center of the reinforcing material 5, a lead wire 7 is connected to the upper part of the lead wire connection hook 6 as shown in FIG. As shown in FIG. 6, a circular electrode plate 8 is fixed.

To use the conventional biological electrode 1 having such a configuration, the lower surface side of the peripheral edge 4 of the adhesive base material 2 is brought into close contact with the skin surface 9 of the living body as shown by the solid line in FIG. is crimped onto the skin surface 9, and the weak cardiac current induced on the skin surface is derived by this electrode plate 8.
The electrocardiogram is connected to an external electrocardiograph (not shown) via a lead wire and an electrocardiogram is recorded.

[Problem to be solved by the invention]

By the way, when the conventional living body induction electrode 1 with such a configuration is brought into close contact with the skin surface of a living body, a weak current generated in the heart is guided to an electrocardiograph to diagnose cardiac abnormalities. For some reason, the lead wire 7 may be pulled upward as shown by the arrow in FIG.

When this lead wire 7 is pulled upward, the sixth
As shown in the imaginary line in the figure, the biological induction electrode 1 rises upward, and the lead wire connection hook 6
Since the electrode plate 8 is fixed at the center of the living body induction electrode 1, the electrode plate 8 is also pulled upward and away from the skin and eye surface 9 as shown by the imaginary line. As a result, there was a problem that poor contact occurred, noise etc. were generated, and accurate electrocardiograms could not be obtained.

[Means to solve the problem]

Therefore, the present invention has been made by focusing on such conventional problems, and is an inductive electrode for a living body that draws a weak current from inside the living body by being in close contact with the skin surface of the living body. An adhesive base material 12 having a notch 13 that is in close contact with a surface and formed by cutting out the center part thereof, and a notch 13 that is adhered to the upper surface side of this adhesive base material 12 and formed in the adhesive base material 12. A reinforcing member 15 that is closed and has a fin-shaped connecting hook fixing portion 15a protruding from one end thereof, and a reinforcing member 15 for connecting a lead wire that is passed through the fin-shaped connecting hook fixing portion 15a of this reinforcing member 15. a lead wire connection hook 16;
One end is connected to this lead wire connection hook 16, and the other end is extended to the notch 13, and the electrode plate 19 is interposed between the adhesive base material 12, the reinforcing material 15, and the notch. To solve the above-mentioned problems by providing means for a living body induction electrode, which is characterized by comprising an electrode plate cover 20 covering the lower surface side of an electrode plate 19 extending into the mouth 13. With the goal.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS How the configuration of the present invention is embodied will be described below with reference to the drawings.

Fig. 1 is a perspective view of the upper side of the biological induction electrode of the present invention, Fig. 2 is a perspective view of the lower side of the biological induction electrode of Fig. 1, and Fig. 3 is an enlarged view taken along the - line in Fig. 1. It is a sectional view, and 11 in the figure is a biological induction electrode.

This biological induction electrode 11 has an adhesive base material 12, and this adhesive base material 12 is a donut-shaped disc made of nonwoven fabric with a central part cut out to form a notch opening 13, as shown in FIG. The lower surface of the outer peripheral edge portion 14 is made of adhesive and is in close contact with the skin surface of the living body, thereby bringing the living body induction electrode 11 into close contact with the skin surface.

On the upper surface side of this adhesive base material 12, as shown in FIG. A reinforcing material 15 made of aluminum is bonded to close a notch 13 formed in the center of the adhesive base material 12.

The adhesive base material 1 which is the central part of this reinforcing material 15
2, the fin-shaped connection hook fixing portion 15a remote from the notch 13 of No. 2, that is, the outer peripheral edge 1 of the adhesive base material 12.
A metal lead wire connection hook 16 is provided through the outer peripheral edge 15a of the reinforcing member 15 that is in close contact with the reinforcing member 4.

This lead wire connection hook 16 has a first
As shown in the figure, the lead wire coupling part 17 protrudes, and a flat electrode plate coupling part 18 is exposed on the lower surface side as shown in FIG.

One end of a lead wire (not shown) is connected to the protruding lead wire coupling portion 17, and the other end of the lead wire is connected to an electrocardiograph (not shown) disposed outside. Further, the electrode plate coupling portion 18 includes a second
As shown in the figure, one end of an electrode plate 19 made of Ag-Agcl is connected, and this electrode plate 19 is
As shown in FIG. As shown, a portion is exposed at the notch 13.

20 is an electrode plate 19 extending into this notch 13
The electrode plate cover is a hydrogel bath, which is made of gelatin, agar, polyacrylamide, etc., and has considerable adhesiveness and conductivity. When this electrode plate cover 20 is brought into close contact with the skin surface, a weak current induced in the skin surface is guided to the electrode plate 19.

This electrode plate cover 20 prevents accurate measurement of weak current due to the contact resistance of the skin surface when the electrode plate 19 is brought into direct contact with the skin surface, so apply cream or the like to the skin surface in advance to weaken the contact resistance. The electrode plate 19 was brought into contact with the cream to measure the weak voltage, but it is troublesome and inefficient to apply cream every time a weak voltage is measured in this way, so the electrode plate 19 is placed in contact with the cream. A hydrogel layer that acts as a moisturizer is attached to the skin, eliminating the inconvenience of applying cream each time.

As the electrode plate cover 20, a polyurethane foam layer impregnated with jelly may be used instead of the hydrogel layer.

Next, the operation of the living body induction electrode 11 having such a configuration will be explained. By bringing the lower surface of the outer circumferential edge 14 of the adhesive base material 12 of the living body induction electrode 11 into close contact with the skin surface of the living body, the electrode plate cover 20 is pressed against the skin surface, and the heart drawn out from the electrode plate cover 20 is The weak current is led to an external electrocardiograph (not shown) through the electrode plate 19, lead wire connection hook 16, and lead wire (not shown), and an electrocardiogram is recorded.

By the way, even if the lead wire is pulled upward for some reason while the electrocardiogram is being recorded with the electrocardiograph, and the living body induction electrode 11 is also pulled upward, the lead wire may be pulled upward. The lead wire connection hook 16 to which the wire is connected is located at one corner of the reinforcing material 15, and the outer peripheral edge of the adhesive base material 12 is in close contact with the skin surface, so even if the lead wire is pulled, the lead wire connection hook 16 is located at one corner of the reinforcing material 15. There is no risk that the central part of the biological induction electrode 11 will rise, and as a result, the biological induction electrode 11
Electrode plate 19 located in the notch 13 in the center of
never leaves the skin surface.

〔Effect of the invention〕

Since the present invention has the above-described configuration, even if the lead wire is pulled, the biological induction electrode that is in close contact with the skin surface will not be lifted up, and there is no possibility that the central part will be lifted up. As a result, the electrode plate located at the center of the biological induction electrode does not separate from the skin surface.
As a result, an accurate electrocardiogram can be obtained.

In addition, the lead wire connection hooks penetrating the outer periphery of the reinforcing material are in close contact with the skin surface via the adhesive base material, so even if the lead wires are pulled upward, there is no risk of the electrode plate lifting up. do not have.

Furthermore, since the lower surface of the electrode plate is covered with an electrode plate cover, there is no need to apply cream or the like on the skin surface beforehand when the biological induction electrode is brought into close contact with the skin surface to derive the weak voltage inside the body. It has the advantage of being convenient as it eliminates the need to use it.

[Brief explanation of drawings]

1 is a perspective view of the upper surface of the biological induction electrode according to an embodiment of the present invention, FIG. 2 is a perspective view of the lower surface of the biological induction electrode of FIG. 1, and FIG. 4 is a top perspective view of the conventional biological induction electrode, FIG. 5 is a bottom perspective view of the biological induction electrode of FIG. 4, and FIG. 6 is a conventional biological induction electrode. FIG. 3 is a diagram illustrating the use of an induction electrode. 11... Biological induction electrode, 12... Adhesive base material,
13... Notch opening, 15... Reinforcing material, 16... Lead wire connection hook, 19... Electrode plate, 20... Electrode plate cover.

Claims (1)

[Scope of Claims] 1. A living body induction electrode that is in close contact with the skin surface of a living body and derives a weak current from within the living body, the electrode being formed by being in close contact with the skin surface of the living body and having its central portion cut out. An adhesive base material 12 having a notch 13, and a fin-shaped connecting hook fixing part 15a attached to the upper surface of the adhesive base material 12 to close the notch 13 formed in the adhesive base material 12 and at one end thereof. A reinforcing member 15 protruding from the reinforcing member 15, and a lead wire connecting hook 16 for connecting a lead wire that is provided through the fin-shaped connecting hook fixing portion 15a of this reinforcing member 15.
One end is connected to this lead wire connection hook 16, and the other end is extended to the notch 13,
and an electrode plate 19 interposed between the adhesive base material 12 and the reinforcing material 15, and an electrode plate cover 20 covering the lower surface side of the electrode plate 19 extending into the notch 13. A biological induction electrode characterized by: 2. The biological induction electrode according to claim 1, wherein the electrode plate cover 20 is made of hydrogel. 3. The biological induction electrode according to claim 1, wherein the electrode plate cover 20 is made of urethane foam impregnated with jelly. 4. The biological induction electrode according to claim 1, wherein the adhesive base material 12 is made of a nonwoven fabric.