JPH0216723Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an inductive electrode for living organisms, and particularly relates to an inductive electrode for living organisms that does not dry out over time and is transparent to X-rays. .

[Prior art]

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 measured by recording the weak voltage induced on the skin of the living body using an external electrocardiograph.
Diagnosing heart abnormalities. In order to electrically connect the input section to the living body, this electrocardiograph requires a living body induction electrode to 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. 6, 7, and 8. In the figures, 1 is a magnetic type bioinduction electrode.

This biological induction electrode 1 has an adhesive base material 2, which has a substantially disc shape and is made of foamed polyethylene resin, closed foam butadiene rubber nonwoven fabric, and knitted fabric. As shown in FIG. 9, this adhesive base material 2 has an adhesive back surface 2a, as shown in FIG. At the same time, the center portion thereof is cut out to form an opening 3.

On the upper surface side (surface side) of this adhesive base material 2, a sixth
As shown in FIGS. 7 and 7, a disk-shaped electrode plate fitting part 4 made of hard resin is smaller than the diameter of the adhesive base material 2.
is adhered to close the opening 3. A protruding ring 4a protrudes from this surface, and a lead wire coupling portion 5 is fitted into this protruding ring 4a. As shown in FIGS. 7 and 9, an electrode element 6 is closely attached to the bottom surface of this lead wire coupling portion 5. As shown in FIGS.

Reference numeral 7 denotes an electrode element cover closely attached to the lower surface of the electrode plate 6, and is made of Karaya rubber and has conductivity. When this electrode element cover 7 is brought into close contact with the skin surface, a weak voltage induced on the skin surface is guided to the electrode element 6.

This electrode element cover 7 is designed to reduce the contact resistance by applying cream or the like to the skin surface in advance, since if the electrode element 6 is brought directly into close contact with the skin surface, accurate weak voltage measurement will not be possible due to the contact resistance of the skin surface. A weak voltage was measured by touching the electrode element 6 on top of the cream, but it is troublesome and inefficient to apply cream every time a weak voltage is measured in this way. It is designed to remove the inconvenience of applying cream one by one by contacting a hydrogel layer that acts as a cream.

What is shown in FIG. 8 is a back view of the lead wire connection body 8, in which a weak voltage from the heart derived from the electrode plate 6 of the biological induction electrode 1 is transmitted to the electrocardiogram through the lead wire 11. (not shown). This lead wire connection body 8 is made of hard resin and has a recess 9 formed therein, a magnetic electrode element coupling part 10 is fixed to the recess 9, and one end of the lead wire 11 is attached to this electrode element coupling part 10. is connected, and the other end of the lead wire 11 is connected to an electrocardiograph (not shown).

[Problem that the invention attempts to solve]

To record an electrocardiogram using the biological induction electrode 1 configured as described above, first, as shown in FIG. M, and then connect the magnetic electrode element coupling portion 10 of the lead wire connection body 8 to the biological induction electrode 1.
The lead wire connection body 8 is magnetically attached to the lead wire coupling portion 5 of the
is connected to the biological induction electrode 1, and the weak voltage from the heart derived from the electrode element 6 is recorded by an electrocardiograph (not shown) via the lead wire 11.

By the way, an electrocardiogram can be obtained in this manner, but depending on the condition of the patient, it may be desirable to perform X-ray photography while the living body induction electrode 1 is attached to the skin surface M of the living body. However, if X-ray photography is performed with the biological induction electrode 1 attached, the electrode element 6
Since the lead wire 11 is made of metal, the 10th lead wire 11 is made of metal.
As shown in the figure, there was an inconvenience in that the shadows of the living body induction electrode 1 and the lead wire 11 were taken, which interfered with X-ray diagnosis.

Furthermore, since the electrode element cover 7 is made of Karaya rubber, it tends to dry out easily and has a short lifespan.

[Means for solving problems]

Therefore, this invention was devised by focusing on the above-mentioned problems, and includes an electrode element made of carbon fiber having a protrusion formed approximately in the center, and a carbon fiber electrode element which is fixed to the upper surface of the electrode element and which is fixed to the upper surface of the electrode element. A stretchable base material made of a foam sheet having a removable piece with a lead wire insertion hole bored at one end, fixed to the lower surface of the electrode element, and sandwiching the electrode element together with the stretchable base material, a doughnut-shaped foam sheet-like adhesive base material that adheres closely to the skin; and an electrode made of hydrogel that is fixed to the lower surface of the electrode element and is in direct contact with the skin surface to weaken the contact resistance of the skin surface of the living body. One end is attached to the element cover and a protruding part protruding from the approximate center of the electrode element, and the other end is inserted into a lead wire insertion hole bored in a removable piece provided on the elastic base material. The present invention is characterized in that it solves the above-mentioned problems by providing a biological induction electrode equipped with a carbon fiber sheet wire connected to an electrocardiograph.

[Effect]

In the above configuration, the adhesive base material of the living body induction electrode is brought into close contact with the skin surface of the living body. When the living body induction electrode is brought into close contact with the skin surface, a weak current inside the living body is drawn out by the electrode element through the electrode element cover.
The weak current drawn by the electrode element is led to the electrocardiograph by a lead wire.

Even if X-ray photography is performed with the biological induction electrode attached to the skin surface, the shadow of the electrode will not be cast, so there will be no malfunction in the X-ray diagnosis.

〔Example〕

Hereinafter, how the configuration of the present invention is actually implemented will be explained with reference to the drawings, along with its operation.

Fig. 1 is a perspective view of a biological induction electrode according to an embodiment of the present invention, Fig. 2 is a back view of Fig. 1, Fig. 3 is a sectional view of Fig. 1, and Fig. 4 is an exploded perspective view of Fig. 1. In the figure, 12 is a biological induction electrode.

This biological induction electrode 12 has an electrode element 13 for deriving a weak current from within the living body, and as shown in FIGS. 3 and 4, this electrode element 13 has a high central part and a It gets lower towards the surrounding area.

It has a disc-like shape, has a protrusion 13a protruding from the center, and is made of carbon fiber.

Since the electrode element 13 is made of carbon fiber in this manner, it transmits X-rays and does not cast a shadow during X-ray diagnosis as shown in FIG. 5.

Fixed on the upper surface of this electrode element 13 is an elastic base material 14 made of a polybutadiene foam sheet. An element fitting hole 14a is formed, and a detachable piece 14b is formed at one end of the element fitting hole 14a to facilitate attachment and detachment of the biological induction electrode 12 to and from the skin surface.
A lead wire insertion hole 14c is formed approximately in the center of the detachable piece 14b.

Reference numeral 15 denotes an adhesive base material made of a polybutadiene foam sheet having approximately the same size as the stretchable base material 14. The upper surface is fixed to the electrode element 13, and the lower surface is in contact with the skin surface to bring the biological induction electrode 12 into close contact with the skin surface.

Fitting into the opening 15a of this adhesive base material 15,
The electrode element cover 16 covers the lower surface of the electrode element 13, and this electrode element cover 16 is made of acrylic water-containing gel, and is resistant to drying over time and has electrical conductivity. . When this electrode element cover 16 comes into contact with the skin surface of a living body, a weak voltage induced on the skin surface is guided to the electrode element 13.

If the electrode element 13 is brought into close contact with the skin surface of a living body, accurate weak voltage cannot be measured due to the contact resistance generated on the skin surface. A weak voltage was measured by contacting the electrode element 13 on top of the cream, but it is troublesome and inefficient to apply cream every time a weak voltage is measured, so the electrode element 13 A hydrogel layer that acts as a cream is attached to the skin, eliminating the inconvenience of applying cream one by one.

Reference numeral 17 denotes a lead wire made of carbon fiber, one end of which is attached to the electrode element protrusion 13a, and the other end of which is a lead wire insertion hole 14c formed in a removable piece 14b formed in the elastic base material 14. It is inserted through the inside and connected to an electrocardiograph (not shown).

Since the lead wire 17 is inserted through the lead wire insertion hole 14c in this manner, the lead wire 17 does not wander and does not get in the way when attaching and detaching the biological induction electrode to and from the living body, making attachment and detachment convenient. Generally, it is difficult to make holes in the elastic base material 14 because it weakens the elastic base material 14 itself, but since the removable piece 14b is attached in this way, it is difficult to make holes in the elastic base material 14. Therefore, it has become possible to form the insertion hole 14c using the detachable piece 14b.

Further, since the lead wire 17 is made of carbon fiber like the electrode element 13, it does not create a shadow as shown in FIG. 5 and does not interfere with X-ray diagnosis.

[Effect of idea]

As described above, according to the present invention, since the electrode element and the lead wire are made of carbon fiber, even if X-rays are taken with the biological induction electrode attached to the skin surface,
The wires are transparent and there are no shadows from the electrode elements or lead wires, so there is no problem with X-ray diagnosis, and X-ray
There is no need to replace the biological induction electrode during radiography.

In addition, a removable piece is provided on the elastic base material, and a lead wire insertion hole is formed in this removable piece, so that one end of the lead wire can be attached to the electrode element, and the other end can be inserted into the lead wire insertion hole and connected to the electrocardiograph. Therefore, the lead wire does not sway and does not get in the way when attaching and detaching the biological induction electrode to and from the living body, making attachment and detachment convenient.

Furthermore, since the electrode element cover is made of hydrous gel, it does not easily dry out over time, and therefore has the advantage of having a longer service life.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a biological induction electrode which is an embodiment of the present invention, Fig. 2 is a rear view of Fig. 1, Fig. 3 is a sectional view of Fig. 1, and Fig. 4 is a cross-sectional view of Fig. 1. Exploded perspective view,
Figure 5 is an X-ray photograph taken with the biological induction electrode attached, Figure 6 is a perspective view of a conventional biological induction electrode, Figure 7 is a rear view of Figure 6, and Figure 8 is FIG. 9 is a perspective view of a conventional lead wire connection body, FIG. 9 is an explanatory diagram of the use of a conventional biological induction electrode, and FIG. 10 is an X-ray photograph of the conventional biological induction electrode in a state where it is still attached. 12... Biological induction electrode, 13... Electrode element,
13a...Protrusion part, 14...Stretchable base material, 14b...
...Detachable piece, 14c... Lead wire insertion hole, 15...
Adhesive base material, 16... Electrode element cover, 17... Lead wire.

Claims (1)

[Scope of utility model registration request] A foam sheet made of a carbon fiber electrode element with a protrusion formed approximately in the center, and a removable piece fixed to the top surface of the electrode element and having a lead wire insertion hole bored at one end. A stretchable base material;
a doughnut-shaped foam sheet-like adhesive base material fixed to the lower surface of the electrode element, sandwiching the electrode element together with the elastic base material, and having adhesiveness that is in close contact with the skin surface of the living body; and a lower surface of the electrode element. an electrode element cover made of hydrous gel that is fixed to the electrode element and is in direct contact with the skin surface of the living body to weaken the contact resistance of the skin surface of the living body; A living body induction electrode, the other end of which is provided with a carbon fiber lead wire that is inserted into a lead wire insertion hole formed in a removable piece provided on the elastic base material and connected to an electrocardiograph.