JP3020953U - Bioelectrode shield and bioelectrode using the shield - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a biomedical electrode capable of obtaining a noise shielding effect and accurately recording / monitoring an electrocardiogram without preparing a special connector or an electrocardiograph. SOLUTION: The conductive gel 13 for inducing bioelectricity from the measured part and the fixed base material 11 having adhesiveness for fixing the conductive gel 13 from above the conductive gel 13 and the holes of the fixed base material 13 are fixed. Connection member 14 from which bioelectricity is led to the connector 20, and the insulating member 1 disposed on the connection member 14 upper part
2, an electrode portion composed of 2 and a sheet member 33 made of an insulating material, which is fixed to the upper portion of the electrode portion and has a conductive layer 31 so as to cover the conductive gel 13 portion; and an electrode portion of the sheet member 33. The shield member 30 is composed of an adhesive conductive gel 32 formed in an electrically connected state on the conductive layer 31 in the extended portion. The adhesive conductive gel 32 of the shield member 30 causes the conductive layer 31 to have the same potential as that of the human body, and the influence of external noise on the electrode portion that induces bioelectricity from the measured portion is attenuated.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a bioelectrode shield suitable for mounting on the skin surface of a living body and a bioelectrode using the shield.

[0002]

[Prior art]

 Electrocardiographic diagnostic techniques using electrocardiography are rapidly developing in both medical and veterinary fields. In order to measure this electrocardiogram, it is necessary to attach the bioelectrode for measuring electrocardiogram information directly to the skin on the body surface. This bioelectrode must be able to be reliably attached to the living body in order to accurately detect the electrical signal generated in the living body and to reliably detect the electrical signal from the skin surface of the subject during measurement. .

The bioelectrode for guiding the electrocardiogram, which is used in the conventional electrocardiographic telemeter transmitter and portable electrocardiographic recorder (Holter electrocardiograph), is generally a magnet type, hook type, tab type, etc. connector portion and lead wire. It is input to the electrocardiographic amplifier through the induction code composed of.

It is the bioelectrode that induces the bioelectricity generated in the living body, or the bioelectricity is weak, and the electrical contact state between the electrode and the measurement target is stable for the bioelectrical signal induced from the living body. Has a great effect on sex. The impedance representing the electrical contact state between the measured part and the electrode is generally as high as several tens KΩ to several 100 KΩ. If this impedance is high, noise from the outside is likely to be received. Especially with Holter electrocardiographs, since the subject wears clothes, it is unavoidable to receive noise such as static electricity due to friction of clothes.

Therefore, as shown in FIG. 9, a part of the induction cord having a magnet type or hook type connector portion in which the connector portion is located directly above the measured portion is connected to the lead wire 120. A conductive plate (shield plate) 111 is arranged further outside the living body contact surface of the main part of the living body electrode 100 of the connector 110 to cover the contact portion between the living body and the electrode having high impedance, and the conductive plate 111 is used for other than signal lines. Shielding measures are taken by connecting the other lead wire (shield wire) to the earth part of the ECG amplifier.

[0006]

[Problems to be solved by the device]

 However, the conventional magnet type and hook type electrodes have the following drawbacks even if they are shielded.

(1) Since the connector is mounted on the main part of the electrode, it becomes bulky, and the subject feels strange.

(2) The connector part becomes complicated and large.

(3) A line for grounding is required in addition to the signal line, and the electrode, connection cord, and electrocardiographic input section must be designed as one body, and each is dedicated.

(4) Since the connector part is large, the contact part between the living body and the electrode is easily pressed, such as being touched or pushed, and the compression force from the outside acts on the electrode in many cases, causing artifacts in the electrocardiogram. , Cause noise.

On the other hand, at present, there is no shield measure for an electrode using a tab-type connector that does not have a connector section directly above the measuring section. Furthermore, in the case of an electrode using a tab-type connector, even if a shield plate is built in the connector part, it does not cover the electrode elements and electrolytes in the main part of the electrode, so external noise such as static electricity or induction hum is generated in the main part of the electrode. Will be mixed in. The potential detected by the bioelectrode is generally very small, and therefore, if one wears clothes while wearing the bioelectrode and carries out his / her daily life, static electricity is generated, especially when the clothes are worn, especially when the humidity is low. Unavoidable. Due to the influence of this generated static electricity, noise is often added to the detection signal, which often interferes with diagnosis.

[0012]

[Means for Solving the Problems]

 The present invention has been made in order to solve the problems of the conventional bioelectrodes described above, and its purpose is to enable reliable and easy connection of signal lines from an electrocardiograph, and It is an object of the present invention to provide a bioelectrode capable of accurately recording / monitoring an electrocardiogram without causing unwanted noise contamination due to the movement of a living body.

As one means for achieving the above object, for example, the following configuration is provided.

A bioelectrode shield that can be fixed so as to cover at least a biosignal derivation site on an upper part of the bioelectrode, and covers at least one biosignal derivation site of the bioelectrode formed of an insulating material thin piece and at least one of A fixed base material extending from the biological electrode, a conductive layer made of a conductive material formed on an electrode contact surface of the fixed base material, and an adhesive layer formed on the conductive layer portion of the fixed base material. And a gel, wherein the conductive gel is directly adhered to the surface of the living body to be measured so that the conductive layer can be maintained at the surface potential of the living body via the conductive gel.

Further, in this bioelectrode shield, for example, the fixed base material extends outward from the tip of the bioelectrode when fixed to the bioelectrode, and the conductive gel extends at least. Or the fixed base material extends outward from the side surface of the biological electrode when fixed to the biological electrode, and the conductive gel is formed on at least the extended portion. Is characterized by. Alternatively, the fixed base material is formed so as to substantially cover the upper surface of the bioelectrode except for the connector connection portion when fixed to the bioelectrode, or the fixed base material is fixed to the bioelectrode. It is characterized in that it is formed so as to substantially cover the upper surface of the biomedical signal derivation portion of the biomedical electrode.

Then, a biomedical electrode is provided with any one of the biomedical electrode shields described above.

In the above structure, the conductive gel formed in the portion extending from the biological electrode is adhered to the surface of the living body to be measured, so that the conductive layer can be easily brought to the same potential as the surface of the living body. A biomedical electrode capable of providing a shielding effect to the conductive layer without providing a special connector or electrocardiograph, obtaining a noise shielding effect, and enabling accurate recording / monitoring of an electrocardiogram. You can

[0018]

[Embodiment of device]

 Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.

In the present invention, a type electrode using an offset type or slide lock type connector has a shield member (shield tape) having a conductive layer that electrically shields the main part of the electrode and an adhesive conductive gel. The configuration. Considering that the electrode connected to the earth line is attached to the subject, a part of the shield tape is fixed to the skin with an adhesive conductive gel, and the conductive layer is electrically connected to the living body to indirectly earth the ground. The noise shielding effect is obtained without preparing a special connector.

[First Example] FIG. 1 is a plan view showing the configuration of a bioelectrode which is an example of an embodiment of the present invention, and FIG. 2 is a sectional view thereof.

In the figure, 10 is a bioelectrode member, 20 is a tab-type connector member for sandwiching the connection member 14 of the bioelectrode member, and 30 is a shield member.

The bioelectrode member 10 guides the fixed base material 11, the insulating member 12 that substantially covers the upper part of the electrode, the adhesive conductive gel 13 that constitutes the electrode, and the detected bioelectricity from the conductive gel 13 to the connector member 20. It is composed of a connecting member 14.

The fixed base material 11 has an adhesive property to fix it to the living body from above the conductive gel 13 so as not to be peeled off from the living body. There is a hole to lead it out. Then, bioelectricity is led out to the connection member 14 from this hole and connected to the connector 20. The insulating member 12 is arranged on the connecting member 14 for fixing and insulating the connecting member 14.

The shield member 30, which is a configuration unique to this example, is composed of a conductive gel 32 that adheres to the skin surface of a living body, and a sheet member 33 in which a conductive layer 31 is provided on the living body contact surface. The sheet member 33 has a vertically long shape as shown in FIG. 1, covers the electrode main part including the conductive gel 13 part excluding the sandwiching part of the connector member 20, and further extends in the tip direction from the electrode part. A conductive gel 32 that extends and that electrically connects the conductive layer 31 and the living body surface to maintain the conductive layer 31 at the living body surface potential is provided.

A configuration example of each of the above members is shown below. It should be noted that the configurations shown below are merely examples, and it is a matter of course that even different compositions having the same effect are included in the scope of the present invention.

The fixed base material 11 and the sheet member 33 can be composed of, for example, the following. That is, it is desirable that the film is made of vinyl chloride film, PET film, synthetic nonwoven fabric, or the like. The connecting member 14 is formed by forming or applying a conductive material such as a silver-silver chloride thin film on the surface of a plastic film such as a vinyl chloride film or a PET film by printing or the like.

The insulating member 12 is preferably made of, for example, a vinyl chloride film, a PET film, a synthetic material non-woven fabric, or the like. The adhesive conductive gels 13 and 32 can be made of acrylic type, urethane type or the like, and can also be made of karaya rubber. Furthermore, the conductive layer 31 of the shield member 30 may be a thin film layer of any conductive metal such as silver-silver chloride, silver, copper, carbon, aluminum, tin, and the formation method thereof is not limited. .

As described above, in the biomedical electrode of this example, the shield member 30 having the conductive layer 31 is arranged on the insulating member 12 so as to cover the conductive gel 13 that leads out bioelectricity. Reference numeral 30 is partly larger than the fixing base material 11 for fixing the conductive gel 13 to the living body, and is connected to the living body by the adhesive conductive gel 32 provided on the living body contact surface of this portion. As a result, the conductive layer 31 has the same electric potential as that of the living body, a shield effect is obtained, and the influence of external noise on the portion that induces bioelectricity from the measured portion is attenuated.

As described above, according to this example, 1. The connector part does not become complicated.

2. The height of the bioelectrical induction part is low and it does not receive external pressure.

3. There is no need for a grounding wire, there is no need to specially design the inductive cord or electrocardiographic input section, and there is no need to make any changes to the electrocardiograph in use.

4. With a simple structure, almost the same effect as the conventional countermeasure product can be obtained.

[Second Example] The above description has been given of the example in which the electrode portion and the shield member are integrated, but the present invention is not limited to the above example. For example, the seal in the first example. By attaching a shield member having the same effect as that of the shield member 30 to the upper portion of the electrode which is not provided with the conventional shield measure, the same effect as described above can be obtained. A second example of the embodiment of the invention according to the present invention, which is configured so as to obtain the shield effect even with the conventional electrode which is not shielded, will be described below with reference to FIG.

In FIG. 3, the same components as those in the first example described above are denoted by the same reference numerals and detailed description thereof will be omitted.

The shield member 50 in the second example has substantially the same configuration as the shield member 30 in the first example shown in FIGS. 1 and 2 described above, and in the second embodiment, it is fixed to the existing electrode. To this end, an adhesive layer 51 is further provided. Then, for example, it is desirable to stick release paper on the entire surface in order to protect the electrodes and the surface on which the living body is fixed, until it is actually used.

Then, in actual use, the shield member 50 of the second example may be attached to the bioelectrode at the position shown in FIGS. 1 and 2.

As described above, according to the second example, even if an electrode that does not have a conventional shield measure is attached to the bioelectrode, any change can be made to the conventional electrocardiograph. Without it, the same shield effect as the first example can be easily obtained. Even in this case, by only attaching the shield member to the bioelectrode that is not normally shielded and using it, a good shield effect can be achieved without making any changes to the conventional electrocardiograph. can do.

[Third Example] Further, the shape of the shield member is not limited to the vertically long shape of each of the above-described embodiments, and any structure can be used so long as it can be reliably attached to the surface of the living body (skin). Good.

A third example of the embodiment of the present invention is shown in FIGS. 4 and 5. In the third example, instead of extending the shield member to the tip portion of the bioelectrode, the shield member is extended to both side surfaces of the bioelectrode as shown in FIG. Is configured to adhere to the surface of the living body.

Then, the shield member 200 has a structure shown in FIG. That is, the shield member 200 of the third embodiment includes a sheet member 201 similar to the sheet member 33 of the first embodiment and a conductive layer 202 similar to the conductive layer 31 of the first embodiment provided on the sheet member. And an adhesive conductive gel 203 provided over the entire surface.

Since the shield member 200 of the third example is configured as described above, it can be easily attached to the upper part of the electrode and can maintain a good adhesive state on the skin of the living body.

Further, with the above configuration, the shield member 200 alone has a sufficient adhesive force, and is not limited to the case where it is integrally formed with the electrode as shown in FIG. Even when only the shield member is constructed as a single unit as in the embodiment, it is not necessary to provide a special adhesive layer. Therefore, it is not limited to the case where the electrode and the shield member are integrated, and only the shield member is attached to the bioelectrode that is not normally shielded and used. A good shield effect can be achieved without performing.

As described above, according to the third example, the shield effect similar to that of the first and second embodiments described above can be achieved, and the conductive gel adheres to the living body on both sides of the electrode. It is possible to maintain the same potential state as that of a living body surface potential.

In the above description, the conductive gel is described as being provided on both side surfaces of the electrode, but the present invention is not limited to the above example. For example, the fixed base material may be any of the electrodes. The conductive gel may be extended from one side surface, and the conductive gel may be formed on the fixed base material portion on the extended one side surface. In this case as well, it is of course possible to achieve the same effect as that of the above-described embodiment.

[Fourth Example] In the shield member of the third example described above, the conductive gel is provided on the entire surface, but the present invention is not limited to the above example, and the conductive gel is applied only to the living body sticking surface. Of course, it may be provided. FIG. 6 shows an example of the shield member of the fourth example of the embodiment of the present invention in which the conductive gel is provided only on the living body contact portion.

In the fourth example, instead of the structure in which the conductive gel of the third example shown in FIG. 5 is provided over the entire surface, the conductive gel is formed only in the portion where the shield member shown in FIG. 4 extends from the electrode portion. 301 and 302 are provided. Then, for example, an adhesive layer may be provided on the electrode fixing portion. Also in the fourth embodiment, it is needless to say that only this shield member may be fixed to the upper portion of a normal electrode which is not shielded so as to have a shielding effect.

Also in the fourth example described above, the same shielding effect as that of the above-described third example is selected, and further, since there is no conductive gel in the portion fixed to the electrode, it can be made thinner.

[Fifth Example] Further, in the above example, the shield member is provided so as to cross or cover not only the main part of the electrode but also the entire upper surface of the electrode. However, in terms of performance, the shielding effect can be achieved even if it is configured to cover the main part of the electrode. Considering the above points, a fifth example of the embodiment of the present invention in which only the main part of the electrode is shielded is shown in FIGS. 7 and 8.

As shown in FIGS. 7 and 8, in the fifth embodiment, the shield member 400 is provided only on the upper portion of the electrode main portion 450 centering on the conductive gel placement portion of the electrode. In FIG. 8, 401 is a conductive layer, 402 is a conductive gel 403, and a sheet member.

Even with the above configuration, it is possible to obtain substantially the same shield effect as in the above-described examples.

As described above, according to each of the above examples, the conductive gel formed in the portion extending from the biological electrode is adhered to the surface of the living body to be measured, so that the conductive layer can be easily formed. The potential can be the same as that of the surface of the living body, and the conductive layer can have a shielding effect without the need for a special connector or electrocardiograph, and a noise shielding effect can be obtained. It can be a biological electrode capable of monitoring and the like.

[0052]

[Effect of device]

 As described above, according to the present invention, the connector part is not complicated, the height of the bioelectrical induction part is low, it is not pressed from the outside, the ground wire is unnecessary, and the induction cord and the electrocardiographic input are provided. It is not necessary to design the part for exclusive use, there is no need to make any changes to the electrocardiograph in use, and with a simple structure, almost the same effect as the conventional countermeasure product can be obtained, etc. Obtainable.

Further, the above-mentioned effects can be achieved even by fixing the shield member of the present invention to an electrode which is not subjected to any shield treatment.

[0054]

[Brief description of drawings]

FIG. 1 is a plan view showing the configuration of an example of a biomedical electrode according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the bioelectrode of the present example shown in FIG.

FIG. 3 is a cross-sectional view showing a shield member for a biomedical electrode according to a second example of the embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a biomedical electrode according to a third example of the embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a shield member of a third example.

FIG. 6 is a cross-sectional view showing a shield member for a biomedical electrode according to a fourth example of the embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of a biomedical electrode of a fifth example of the embodiment mode of the present invention.

FIG. 8 is a sectional view showing a shield member of a fifth example.

FIG. 9 is a diagram showing an example of a biomedical electrode and a connector that have been subjected to conventional step-old processing.

[Explanation of symbols]

10 bioelectrode member 11 fixed base material 12 insulating member 13, 32, 203, 301, 302, 402 conductive gel 14 connection member 20, 50 connector member 30, 50, 200, 300, 400 shield member 31, 202, 401 conductive layer 33, 201, 403 sheet member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Fukuda 3-39-4 Hongo, Bunkyo-ku, Tokyo Fukuda Electronics Co., Ltd.

Claims (6)

[Scope of utility model registration request] 1. A bioelectrode shield which can be fixed so as to cover at least a biosignal derivation site on an upper part of the bioelectrode, and which covers at least the biosignal derivation site of the bioelectrode formed of an insulating material thin piece. One of the fixed base material extending from the bioelectrode, a conductive layer made of a conductive material formed on the electrode contact surface of the fixed base material, and the adhesiveness formed on the conductive layer portion of the fixed base material. A living body electrode shield comprising: a conductive gel having; and a conductive electrode that is directly adhered to a living body surface to be measured so that the conductive layer can be maintained at a living body surface potential via the conductive gel. 2. The fixing base material extends outward from the tip of the bioelectrode when fixed to the bioelectrode, and the conductive gel is formed at least in the extending portion. The bioelectrode shield according to claim 1. 3. The fixed base material extends outward from a side surface of the bioelectrode when fixed to the bioelectrode, and the conductive gel is formed at least in an extended portion. Item 1. A bioelectrode shield according to item 1. 4. The fixing base material is formed so as to substantially cover the upper surface of the bioelectrode except the connector connecting portion when fixed to the bioelectrode. The biological electrode shield described. 5. The fixing base material is formed so as to substantially cover an upper surface of a biological signal lead-out portion of the biological electrode when fixed to the biological electrode. Shield for biological electrodes. 6. A living body electrode comprising the living body electrode shield according to any one of claims 1 to 5.