JP2008212488A - Electrode for biological information measurement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To satisfactorily maintain contact of a gel layer and an electrode part even when the adhesive power of the gel layer declines. <P>SOLUTION: The electrode 100 for biological information measurement comprises a film-like base material 100 provided with a pair of surfaces and the gel layer 130 provided to one surface of the base material 110 while interposing an electrode part 120 between the gel layer and one surface of the base material 110. The gel layer 130 is fixed by clamping the gel layer 130 by a disk-like nonwoven fabric 140 covering at least a part of the other surface of the base material 110 and an annular nonwoven fabric 150 exposing a part of the gel layer 130 and covering the remaining part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a biological information measuring electrode that is worn on a subject and measures biological information such as an electrocardiogram.

  As one of the electrocardiogram examinations for examining an electrocardiogram abnormality such as arrhythmia or ischemic heart disease, there is a Holter electrocardiogram examination (for example, see Patent Document 1). In the Holter electrocardiogram examination, an electrocardiogram electrode (dispo electrode) connected to a portable recording device is attached to the subject's chest, and the electrocardiogram of the subject detected by the electrocardiogram electrode is displayed for a certain period (for example, 24 hours). ) Continuously recorded in the recording device. By analyzing the electrocardiogram recorded in the recording device, an electrocardiogram abnormality that appears only occasionally can be captured.

A conventional electrocardiogram electrode is formed by adhering a non-woven fabric coated with a pressure-sensitive adhesive and a conductive pressure-sensitive adhesive gel layer with an electrode portion interposed therebetween, and the pressure-sensitive adhesive force of the gel layer and the pressure-sensitive adhesive applied to the non-woven fabric. It is fixed to the subject's chest using both of the adhesive strength. An electrocardiogram signal, which is an electromotive force generated by the activity of the subject's heart, is transmitted to the electrode section through the gel layer, and further transmitted from the electrode section to the recording apparatus.
JP 2001-299711 A

  However, in the conventional electrocardiogram electrode, when the gel layer absorbs a certain amount or more of moisture due to the subject's perspiration, the adhesive strength of the gel layer decreases and the gel layer moves, and the gel layer and the electrode portion There is a problem that poor contact occurs. If poor contact between the gel layer and the electrode portion occurs, the electrocardiogram signal of the subject cannot be transmitted to the recording device, and the electrocardiogram measurement cannot be performed normally.

  The present invention has been made in view of the above points, and provides a biological information measuring electrode capable of maintaining good contact between a gel layer and an electrode part even when the adhesive strength of the gel layer is reduced. The purpose is to provide.

  The biological information measuring electrode of the present invention is provided on one surface of the base material with an electrode portion interposed between the membrane-shaped base material having a pair of surfaces and one surface of the base material. A biological information measuring electrode having a gel layer, wherein the first tape member covers at least a part of the other surface of the base material, and the second tape exposes a part of the gel layer and covers the remaining part. The structure which fixes the said gel layer by pinching | interposing the said gel layer with a member is taken.

  The biological information measuring electrode of the present invention is provided on one surface of the base material with an electrode portion interposed between the membrane-shaped base material having a pair of surfaces and one surface of the base material. In the biological information measuring electrode, comprising: a gel layer; and an intermediate substrate embedded in the gel layer and extending from the inside of the gel layer to the outside for maintaining the shape of the gel layer. A configuration is adopted in which the gel layer is fixed by sandwiching a part of the gel layer between the tape member covering at least a part of the other surface of the material and the intermediate base material.

  According to this invention, even if it is a case where the adhesive force of a gel layer falls, the contact of a gel layer and an electrode part can be maintained favorable.

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

(Embodiment 1)
FIG. 1 is an exploded perspective view showing a configuration of a biological information measuring electrode 100 according to Embodiment 1 of the present invention. In the present embodiment, the “upper surface” means a surface facing the direction opposite to the surface of the biological information measuring electrode 100 attached to the subject, and the “lower surface” means for measuring biological information. The surface which faces the direction of the surface where the electrode 100 is attached to the subject is meant.

  In FIG. 1, the biological information measuring electrode 100 mainly includes a base material 110, an electrode part 120, a gel layer 130, a disk-shaped nonwoven fabric 140, an annular nonwoven fabric 150, and a separator 160. An adhesive 141 is applied to the lower surface of the disk-shaped nonwoven fabric 140, and an adhesive 151 is applied to the lower surface of the annular nonwoven fabric 150.

  Each of the base material 110 and the electrode portion 120 has an elongated portion that is elongated and functions as a lead wire that transmits an electrocardiogram signal detected from the subject to a recording device (not shown). .

  The substrate 110 is made of a film-like film material such as polyethylene terephthalate (PET) and has a pair of upper and lower surfaces. An electrode part 120 is provided on the lower surface of the base material 110, and the base material 110 forms the core of the sensor part and the lead wire of the biological information measuring electrode 100. A shield film may be formed on the upper surface of the substrate 110 as a countermeasure against electromagnetic waves and static electricity to the electrode part 120.

  The electrode unit 120 is made of a material such as silver-silver chloride (Ag—AgCl), and is disposed between the lower surface of the substrate 110 and the gel layer 130. The electrode unit 120 detects an electrocardiogram signal transmitted from the gel layer 130 and transmits it to a recording device (not shown).

  The gel layer 130 is a gel layer having conductivity, adhesiveness, and hygroscopic expansion. The gel layer 130 is bonded to the lower surface of the base material 110 with the electrode portion 120 interposed between the upper surface side gel portion 131 and the lower surface of the base material 110. Further, the gel layer 130 is adhered to the lower surface of the disk-shaped nonwoven fabric 140 by its own adhesive force and the adhesive force of the adhesive 141 applied to the disk-shaped nonwoven fabric 140. The surface area of the gel layer 130 is larger than the surface area of the substrate 110, and the gel layer 130 has a region protruding from the peripheral edge of the substrate 110. The gel layer 130 has an electrocardiogram signal (electricity of the heart) that is a minute electromotive force generated by the activity of the subject's heart with the lower gel portion 132 fixed to the subject's chest by its own adhesive force. Excitement) is transmitted to the electrode unit 120.

  Between the upper surface side gel part 131 and the lower surface side gel part 132 of the gel layer 130, in order to maintain the shape of the gel layer 130, the upper surface side gel part 131 and the lower surface side gel part 132 have substantially the same surface area. An intermediate base material 133 that is a thin mesh-like nonwoven fabric is provided. More specifically, the gel layer 130 is formed by causing the gel to ooze from one surface side (front side) of the intermediate base material 133 to the other surface side (back side) of the intermediate base material 133. Therefore, the gel layer 130 is formed by integrating the upper surface side gel portion 131, the lower surface side gel portion 132, and the intermediate base material 133, and these are not separated. That is, the upper surface side gel part 131 and the lower surface side gel part 132 do not move relative to the intermediate base material 133.

  The disk-shaped non-woven fabric 140 as the first tape member covers at least a part of the upper surface of the base material 110 (here, the entire upper surface of the base material 110). The disc-shaped non-woven fabric 140 protects each member of the biological information measuring electrode 100 and attaches the biological information measuring electrode 100 to the chest of the subject with an adhesive 141 applied to the lower surface thereof. The disk-shaped non-woven fabric 140 has a large number of ventilation pores (not shown), and the moisture absorbed by the gel layer 130 due to the subject's perspiration and the like is evaporated to the outside air through these pores.

  The annular nonwoven fabric 150 as the second tape member exposes a part of the gel layer 130 from the lower surface side gel part 132 of the gel layer 130 and covers the remaining part. More specifically, the annular nonwoven fabric 150 has a circular opening 152, and a portion of the gel layer 130 is exposed through the opening 152, and the gel layer 130 is sandwiched and fixed between the disk-shaped nonwoven fabric 140. To do. The upper surface of the annular nonwoven fabric 150 is bonded to the lower surface of the disk-shaped nonwoven fabric 140 with an adhesive 141 applied to the disk-shaped nonwoven fabric 140. Moreover, the cyclic | annular nonwoven fabric 150 affixes the biological information measuring electrode 100 on a subject's chest with the adhesive 151 apply | coated to the lower surface. The structure in which the gel layer 130 is sandwiched between the disc-shaped nonwoven fabric 140 and the annular nonwoven fabric 150 will be described in detail later with reference to FIG.

  The separator 160 is affixed in a sealed state to the gel layer 130, the adhesive 141 applied to the disc-shaped nonwoven fabric 140, and the adhesive 151 applied to the annular nonwoven fabric 150, and prevents these from drying when not in use. To prevent a decrease in adhesive strength.

  Next, a structure in which the gel layer 130 is sandwiched between the disc-shaped nonwoven fabric 140 and the annular nonwoven fabric 150 will be described with reference to FIG.

  FIG. 2 is a schematic cross-sectional view showing a structure in which the gel layer 130 is sandwiched between the disc-shaped nonwoven fabric 140 and the annular nonwoven fabric 150.

  In FIG. 2, the gel layer 130 is bonded to the lower surface of the base material 110 with the electrode portion 120 interposed between the upper surface side gel portion 131 and the lower surface of the base material 110. Bonded to the bottom surface. The disk-shaped non-woven fabric 140 covers at least a part of the upper surface of the substrate 110, here the entire upper surface of the substrate 110.

  On the other hand, from the lower gel portion 132 of the gel layer 130, the annular nonwoven fabric 150 is adhered to the disc-shaped nonwoven fabric 140 by an adhesive or a welding process in a state where a part of the gel layer 130 is exposed and the remaining portion is covered. The More specifically, the annular nonwoven fabric 150 has an opening 152 having a smaller surface area (diameter) than that of the gel layer 130, and the peripheral portion of the gel layer 130 is circled by the region X near the peripheral frame of the opening 152. Press against the plate-like nonwoven fabric 140 side. Moreover, the area | region except the area | region X of the cyclic | annular nonwoven fabric 150 is adhere | attached in the state which contact | adhered to the disk-shaped nonwoven fabric 140 completely.

  Thus, the gel layer 130 has a portion (the center portion) of the gel layer 130 exposed between the disc-shaped nonwoven fabric 140 and the region X in the vicinity of the peripheral frame of the opening 152 of the annular nonwoven fabric 150, and the remaining portion. In a state where the (peripheral part) is covered, it is sandwiched and fixed from above and below. Moreover, since the disk-shaped nonwoven fabric 140 and the annular nonwoven fabric 150 are bonded except for a region contributing to the sandwiching of the gel layer 130, there is no room for the gel layer 130 to move left and right. That is, the gel layer 130 is fixed by being sandwiched between the disk-shaped nonwoven fabric 140 and the annular nonwoven fabric 150, so that only a part for contacting the subject is exposed, and the gel layer 130 moves up and down and left and right. Be regulated.

  Therefore, even when the adhesion of the gel layer 130 is reduced by absorbing the subject's sweat and the adhesion depending on the adhesion of the gel layer 130 becomes impossible, the gel layer 130 is initially It is possible to maintain good contact without leaving the electrode portion 120.

  When using the biological information measuring electrode 100 configured as described above, the person in charge of measurement first peels off the separator 160 from the biological information measuring electrode 100, and the adhesive between the exposed gel layer 130 and the adhesives 141 and 151. The biological information measuring electrode 100 is affixed to a predetermined electrode mounting position of the subject by force. The person in charge of measurement connects the lead wire formed by the extended portion of the base material 110 and the electrode part 120 to a portable recording device (not shown). In this way, the wearing of the biological information measuring electrode 100 is completed, and the subject lives in this state as usual.

  During this time, the biological information measuring electrode 100 continuously detects an electrocardiogram signal, which is a minute electromotive force generated by the activity of the subject's heart, over a certain period (for example, 24 hours), and the recording device Transmit to. More specifically, the gel layer 130, which is an electrolyte fixed on the chest of the subject, transmits the electrocardiogram signal of the subject to the electrode unit 120, and the electrode unit 120 transmits the electrocardiogram signal transmitted through the gel layer 130. Transmit to the recording device.

  The electrocardiogram signal transmitted to the recording device is converted into an electrocardiogram waveform by performing processing such as amplification and analog-digital conversion. A clue.

  By the way, in the Holter electrocardiogram examination, since the biological information measurement electrode 100 is continuously worn at a predetermined position on the subject's chest, the subject may sweat from the wearing site of the electrode. The gel layer 130 that is in direct contact with the mounting site has a property that it easily absorbs moisture, and if it absorbs too much moisture, the adhesive force decreases and expands. The gel layer 130 having a reduced adhesive force cannot remain at the initial adhesion position to the disk-shaped nonwoven fabric 140, and is away from the disk-shaped nonwoven fabric 140 (up and down direction) or on the lower surface of the disk-shaped nonwoven fabric 140. This causes a serious problem of moving in a side-sliding direction (left-right direction) and causing poor contact with the electrode unit 120. The poor contact between the gel layer 130 and the electrode unit 120 means that the path through which the electrocardiogram signal is transmitted is interrupted, and normal electrocardiogram measurement cannot be performed.

  In this regard, in this embodiment, the gel layer 130 has a larger surface area than the base material 110 and has a region protruding from the peripheral edge of the base material 110, and the disc-shaped nonwoven fabric 140 covering this region is Since there are a large number of ventilation pores, moisture absorbed by the patient's perspiration can be evaporated from this region. Thereby, it can prevent that the adhesive force of the gel layer 130 falls because water | moisture content is absorbed too much. In addition, skin disorders such as swelling and rash due to stagnation of moisture can be prevented.

  Even if the gel layer 130 absorbs moisture too much and loses its adhesive strength, the gel layer 130 includes a disc-shaped nonwoven fabric 140 that covers the entire upper surface of the substrate 110 and a part of the gel layer 130. Since it is sandwiched and fixed by the annular nonwoven fabric 150 that exposes the remaining portion and covers the remaining portion, it does not move in a direction away from the disk-shaped nonwoven fabric 140 and does not cause poor contact with the electrode portion 120. Further, since the disk-shaped nonwoven fabric 140 and the annular nonwoven fabric 150 are completely bonded except for the region X near the peripheral frame of the opening 152 of the annular nonwoven fabric 150, the gel layer 130 covers the lower surface of the disk-shaped nonwoven fabric 140. It does not move in a side-sliding direction and cause poor contact with the electrode unit 120. Thus, since the gel layer 130 is sandwiched and fixed by the disk-like nonwoven fabric 140 and the annular nonwoven fabric 150 from the top, bottom, left, and right, it can remain at the original adhesion site. That is, the gel layer 130 is mechanically sandwiched between the upper and lower nonwoven fabrics (into the grooves formed by the upper and lower nonwoven fabrics while maintaining good contact with the electrode portion 120 regardless of the presence or absence of its own adhesive force. Fixed by fitting).

  In addition, it is possible to prevent the gel layer 130 from being left on the chest of the subject when the biological information measurement electrode 100 is removed after the measurement is completed.

  Thus, according to the present embodiment, one surface of the substrate 110 while interposing the electrode portion 120 between the film-shaped substrate 110 having a pair of surfaces and one surface of the substrate 110. A disc-shaped nonwoven fabric 140 that covers at least a portion of the other surface of the substrate 110, and an annular nonwoven fabric 150 that exposes a portion of the gel layer 130 and covers the remaining portion. Then, the gel layer 130 is fixed by sandwiching the gel layer 130 therebetween. Thereby, even if it is a case where the adhesive force of a gel layer falls, the contact of a gel layer and an electrode part can be maintained favorable.

(Embodiment 2)
In this embodiment, the intermediate base material provided between the upper surface side gel part and the lower surface side gel part of the gel layer is stretched from the inside of the gel layer to the outside, and the stretched intermediate base material is sandwiched and fixed by a nonwoven fabric. The case where it does is demonstrated.

  FIG. 3 is an exploded perspective view showing the configuration of the biological information measuring electrode 200 according to Embodiment 2 of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals, and description of overlapping portions is omitted.

  In FIG. 3, the biological information measuring electrode 200 includes a gel layer 210 and an annular nonwoven fabric 220. An adhesive 221 is applied to the lower surface of the annular nonwoven fabric 220.

  Between the upper surface side gel part 211 and the lower surface side gel part 212 of the gel layer 210, in order to maintain the shape of the gel layer 210, an intermediate group having a larger surface area than the upper surface side gel part 211 and the lower surface side gel part 212. A material 213 is provided. The intermediate base material 213 extends from the inside of the gel layer 210 to the outside. Here, the intermediate base material 213 extends from the entire periphery of the gel layer 210. Further, since the gel layer 210 is formed by causing the intermediate base material 213 to ooze out the gel, the upper surface side gel part 211 and the lower surface side gel part 212 are not separated from the intermediate base material 213.

  The annular nonwoven fabric 220 covers the intermediate base material 213 extended from the gel layer 210 with the lower surface of the gel layer 210 exposed from the lower surface side gel portion 212 side of the gel layer 210. More specifically, the annular nonwoven fabric 220 has a circular opening 222, and is provided in the gel layer 210 between the disk-shaped nonwoven fabric 140 while exposing the lower surface of the gel layer 210 through the opening 222. The stretched portion of the intermediate base material 213 is sandwiched and fixed.

  FIG. 4 is a schematic cross-sectional view showing a structure in which the gel layer 210 is sandwiched between the disc-shaped nonwoven fabric 140 and the annular nonwoven fabric 220.

  In FIG. 4, the gel layer 210 is adhered to the lower surface of the base material 110 with the electrode portion 120 interposed between the upper surface side gel portion 211 and the lower surface of the base material 110, and the disc-shaped non-woven fabric 140. Bonded to the bottom surface. The disk-shaped non-woven fabric 140 covers at least a part of the upper surface of the substrate 110, here the entire upper surface of the substrate 110.

  On the other hand, from the lower surface side gel part 212 side of the gel layer 210, the entire surface of the lower surface of the gel layer 210 is exposed and the stretched portion of the intermediate base material 213 provided on the gel layer 210 is covered. 220 is bonded to the disk-shaped nonwoven fabric 140 by an adhesive or a welding process. More specifically, the annular nonwoven fabric 220 has an opening 222 having substantially the same surface area (diameter) as the upper surface side gel part 211 and the lower surface side gel part 212, and the region Y in the vicinity of the peripheral frame of the opening part 222. Thus, the stretched portion of the intermediate substrate 213 is pressed against the disk-shaped nonwoven fabric 140 side. Moreover, the area | region except the area | region Y of the cyclic | annular nonwoven fabric 220 is adhere | attached in the state which contact | adhered to the disk shaped nonwoven fabric 140 completely.

  Thus, the gel layer 210 has the entire lower surface of the gel layer 210 exposed between the disc-shaped nonwoven fabric 140 and the region Y in the vicinity of the peripheral frame of the opening 222 of the annular nonwoven fabric 220, and the intermediate substrate. In a state where the stretched portion 213 is covered, it is sandwiched and fixed from above and below. As described above, in the gel layer 210, the upper surface side gel part 211, the lower surface side gel part 212, and the intermediate base material 213 are integrally formed in the manufacturing process, and these are not separated. Accordingly, even when the intermediate base material 213 stretched between the upper surface side gel portion 211 and the lower surface side gel portion 212 is sandwiched, the same fixing strength as that when the gel main body is sandwiched can be obtained. The movement to can be regulated.

  Moreover, since the disk-shaped nonwoven fabric 140 and the annular nonwoven fabric 220 are bonded except for the region contributing to the sandwiching of the gel layer 210, there is no room for the gel layer 210 to move left and right. That is, the gel layer 210 is sandwiched and fixed between the disc-shaped nonwoven fabric 140 and the annular nonwoven fabric 220, so that the entire lower surface for contact with the subject is exposed, and the gel layer 210 moves up and down and left and right. Be regulated.

  Therefore, even if the adhesion of the gel layer 210 is reduced by absorbing the subject's sweat and the adhesion depending on the adhesion of the gel layer 210 becomes impossible, the gel layer 210 is initially It is possible to maintain good contact without leaving the electrode portion 120.

  Thus, according to the present embodiment, the gel layer 210 has the intermediate base material 213 for maintaining the shape of the gel layer 210 that extends from the inside of the gel layer 210 to the outside, and is a disk-shaped nonwoven fabric. 140 and the annular nonwoven fabric 220 sandwich the stretched portion of the intermediate substrate 213. Thereby, the whole lower surface of the gel layer 210 can be exposed, and the sticking area to the subject of the gel layer 210 can be enlarged. Moreover, since only a part of the lower surface of the gel layer 210 is not covered, the application surface can be flattened, and stable application to the subject can be realized.

  Finally, a modification of the sandwich structure of the gel layer according to the present invention will be described with reference to FIG.

  FIG. 5 is a schematic cross-sectional view showing a sandwich structure of gel layers according to a modification of the present invention. FIG. 5 omits the annular nonwoven fabric 220 in FIG.

  In FIG. 5, the gel layer 210 is adhered to the lower surface of the base material 110 with the electrode portion 120 interposed between the upper surface side gel portion 211 and the lower surface of the base material 110, and further, Bonded to the bottom surface. The disk-shaped non-woven fabric 140 covers at least a part of the upper surface of the substrate 110, here the entire upper surface of the substrate 110.

  On the other hand, the stretched portion of the intermediate base material 213 provided in the gel layer 210 is bonded to the disk-shaped nonwoven fabric 140 by a pressure-sensitive adhesive or a welding process in a state where the upper surface side gel portion 211 is covered.

  Thus, according to this modification, the gel layer 210 is covered with the upper surface side gel portion 211 sandwiched between the disk-shaped nonwoven fabric 140 and the intermediate base material 213, and the lower surface side gel portion 212 is exposed. It is fixed in the state. As described above, in the gel layer 210, the upper surface side gel part 211, the lower surface side gel part 212, and the intermediate base material 213 are integrally formed in the manufacturing process, and these are not separated. Therefore, even when only the upper surface side gel portion 211 is sandwiched and fixed, a fixed strength of the gel layer 210 can be obtained.

  In each of the above-described embodiments, the case where a disk-shaped nonwoven fabric and an annular nonwoven fabric are used as the nonwoven fabric sandwiching the gel layer has been described as an example. However, the gel layer is partly exposed and covered and the remaining portion is covered and fixed The shape of the non-woven fabric is not limited as long as it can be performed, and for example, a non-woven fabric having a substantially rectangular shape or other shapes may be used. In particular, the opening of the nonwoven fabric for exposing a part of the gel layer does not need to be a completely closed loop shape, and a nonwoven fabric having a cut-shaped opening such as a C-shape may be used. . Thereby, the manufacturing process of a nonwoven fabric can be simplified.

  In the present embodiment, the case where the biological information measurement electrode is used in the Holter electrocardiogram is described as an example, but the present invention is not limited to this. For example, the biological information measurement electrode of the present invention can be used in other biological information measurement tests such as a 12-lead ECG test.

1 is an exploded perspective view showing a configuration of a biological information measurement electrode according to Embodiment 1 of the present invention. Schematic sectional view showing the structure of sandwiching a gel layer by a disk-shaped nonwoven fabric and an annular nonwoven fabric according to Embodiment 1 of the present invention The disassembled perspective view which shows the structure of the electrode for biological information measurement which concerns on Embodiment 2 of this invention. Schematic sectional view showing the structure of sandwiching the gel layer by the disk-shaped nonwoven fabric and the annular nonwoven fabric according to Embodiment 2 of the present invention The schematic sectional drawing which shows the structure of the sandwiching of the gel layer by the modification of this invention

Explanation of symbols

100, 200 Biological information measurement electrode 110 Base material 120 Electrode part 130, 210 Gel layer 131, 211 Upper surface side gel part 132, 212 Lower surface side gel part 133, 213 Intermediate base material 140 Disc-shaped nonwoven fabric 150, 220 Annular nonwoven fabric 160 Separator

Claims (4)

Biological information measurement electrode having a film-like base material having a pair of surfaces and a gel layer provided on one surface of the base material with an electrode portion interposed between the one surface of the base material In
By sandwiching the gel layer with a first tape member that covers at least a part of the other surface of the substrate and a second tape member that exposes a part of the gel layer and covers the remaining part, Fixing the gel layer;
An electrode for measuring biological information. The remaining portion includes a peripheral portion of the gel layer.
The biological information measuring electrode according to claim 1. The gel layer has an intermediate base for maintaining the shape of the gel layer, extending from the inside of the gel layer to the outside.
The first and second tape members sandwich the stretched portion of the intermediate substrate;
The biological information measuring electrode according to claim 1. A film-like substrate having a pair of surfaces;
A gel layer provided on one surface of the substrate while interposing an electrode portion between the one surface of the substrate and
In the biological information measurement electrode having an intermediate base material for maintaining the shape of the gel layer, embedded in the gel layer and extending from the inside of the gel layer to the outside,
Fixing the gel layer by sandwiching a part of the gel layer between the tape member covering at least a part of the other surface of the substrate and the intermediate substrate;
An electrode for measuring biological information.

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