WO2007091380A1

WO2007091380A1 - Portable electrocardiograph

Info

Publication number: WO2007091380A1
Application number: PCT/JP2006/326219
Authority: WO
Inventors: Masahiro Umeda; Norihito Yamamoto; Yusaku Sakoda
Original assignee: Omron Healthcare Co., Ltd.
Priority date: 2006-02-10
Filing date: 2006-12-28
Publication date: 2007-08-16
Also published as: JP2007209610A

Abstract

A portable electrocardiograph has a negative electrode adapted to be in contact with a hand of a subject and also has a positive electrode (122) adapted to be in contact with a predetermined measurement part of the subject and capable of measuring, as an electrocardiographic waveform, an electric signal detected by both the negative electrode and the positive electrode (122). Rubber (190) is provided at a position surrounding the positive electrode (122) of an electrode-forming surface, and the rubber (190) is made to be in intimate contact with that portion of the body surface which surrounds the measurement part when the positive electrode (122) is in contact with the measurement part. With such an arrangement, contact stability between the electrode and the measurement part can be enhanced.

Description

Specification

Portable electrocardiograph

Technical field

TECHNICAL FIELD [0001] The present invention relates to an electrocardiograph, and more particularly, to a portable electrocardiograph that can be carried and can easily measure an electrocardiogram waveform.

Background art

In general, an electrocardiogram of a patient is used for diagnosis of arrhythmia, ischemic heart disease such as angina pectoris and myocardial infarction. Various types of electrocardiographs used for obtaining an electrocardiogram are known. One of them is a portable electrocardiograph that enables measurement and storage of an electrocardiogram waveform when the subject himself / herself touches the body when a subjective symptom to be measured occurs. ing. This portable electrocardiograph is classified as an event-type electrocardiograph. A Holter-type electrocardiograph that continuously measures and records the electrocardiographic waveform while wearing daily life by attaching electrodes to the patient's body in advance. Are distinguished from each other.

[0003] In such portable electrocardiographs, proposals for measuring an electrocardiographic waveform with high accuracy have been conventionally made. For example, Japanese Patent Laid-Open No. 2005-46215 (Patent Document 1) describes a positive electrode (on the side in contact with the chest of the subject) in order to improve the contact stability between the contact surface of the positive electrode and the measurement site (chest). It is disclosed that a non-electrode region formed flat is provided so as to surround an electrode region where an electrode) is located. Furthermore, Patent Document 1 discloses that a plurality of protrusions are provided around the electrode in order to prevent the electrode from being displaced on the body surface during measurement. As a result, even if the electrocardiograph is grasped to some extent and the hand or measurement site moves, the variation of the contact site occurs in the non-electrode region and hardly occurs in the electrode region. .

Patent Document 1: JP 2005-46215 A

Disclosure of the invention

Problems to be solved by the invention

[0004] However, in the configuration disclosed in Patent Document 1 described above, the electrocardiograph is grasped during measurement, and the hand or arm is lowered, so that the direction in which the measurement site is pressed is different from the pressing direction. More than predetermined If the above force is applied, the friction of the protrusions alone may not be sufficient to maintain good contact stability between the contact surface of the positive electrode and the measurement site.

[0005] The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a portable electrocardiograph that can further improve the contact stability between the electrode and the measurement site. It is to provide.

Means for solving the problem

[0006] A portable electrocardiograph according to the present invention includes a first electrode for contacting a subject's hand, a second electrode for contacting a predetermined measurement site of the subject, the first electrode, A measurement unit for measuring an electrical signal detected by the second electrode as an electrocardiographic waveform, and a housing including the first electrode, the second electrode, and the measurement unit. The housing has an electrode formation surface provided with a second electrode, and the measurement site is located in a position surrounding the second electrode on the electrode formation surface in a state where the second electrode is in contact with the measurement site. It further has a close contact portion for contacting with the surrounding body surface.

[0007] In the portable electrocardiograph according to the present invention, it is preferable that the contact portion has a contact surface in contact with the body surface. In this case, the member constituting the contact surface is a rubber. Or preferably it is a thermoplastic elastomer.

[0008] In the portable electrocardiograph according to the present invention, it is preferable that the contact portion has the first contact surface in contact with the body surface. It is preferable that the members constituting the surface have adhesiveness.

[0009] The portable electrocardiograph according to the present invention further includes a first protective member for protecting the first contact surface when the portable electrocardiograph is not in use. In this case, it is preferable that the first protective member is configured to be removable by the subject.

[0010] In the portable electrocardiograph according to the present invention, it is preferable that the contact portion further has a second contact surface in contact with the electrode formation surface. It is preferable that the members constituting the contact surface have adhesiveness.

[0011] The portable electrocardiograph according to the present invention further includes a second protective member for protecting the second contact surface when the portable electrocardiograph is not in use. Prefer Good.

The invention's effect

[0012] According to the present invention, a portable electrocardiograph with improved contact stability between an electrode and a measurement site can be provided. Therefore, the measurement accuracy of the electrocardiogram waveform can be improved. Brief Description of Drawings

FIG. 1 is a schematic perspective view of a portable electrocardiograph according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view of a portable electrocardiograph according to an embodiment of the present invention.

FIG. 3 is a front view of a portable electrocardiograph according to the embodiment of the present invention.

FIG. 4 is a top view of the portable electrocardiograph according to the embodiment of the present invention.

FIG. 5 is a bottom view of the portable electrocardiograph according to the embodiment of the present invention.

FIG. 6 is a right side view of the portable electrocardiograph according to the embodiment of the present invention.

FIG. 7 is a left side view of the portable electrocardiograph according to the embodiment of the present invention.

FIG. 8 is a perspective view showing a measurement posture to be taken by a subject when measuring an electrocardiographic waveform using the portable electrocardiograph according to the embodiment of the present invention.

[Fig. 9] Fig. 9 is a view of the measurement posture to be taken by the subject when the electrocardiogram waveform is measured using the portable electrocardiograph according to the embodiment of the present invention.

FIG. 10 is a block diagram showing a hardware configuration of the portable electrocardiograph according to the embodiment of the present invention.

FIG. 11 is a flowchart showing the flow of measurement processing in the portable electrocardiograph according to the embodiment of the present invention.

FIG. 12 is a diagram showing an example of a screen display of measurement results in the embodiment of the present invention.

FIG. 13 is a diagram showing an example of a display screen of the measurement result of the electrocardiogram waveform stored in the memory in the embodiment of the present invention.

FIG. 14 is a view showing another arrangement example of rubber in the embodiment of the present invention.

FIG. 15 is a view showing still another arrangement example of rubber in the embodiment of the present invention.

FIG. 16 is a diagram showing another example of the form of the positive electrode in the embodiment of the present invention.

FIG. 17 is a diagram showing a state where an adhesive member is arranged at a position surrounding a positive electrode in the embodiment of the present invention. FIG. 18 is a diagram showing a state where an adhesive member is disposed at a position surrounding a positive electrode in the embodiment of the present invention.

Explanation of symbols

[0014] 100 portable electrocardiograph, 110 device body, 111 front, 112 back, 113 top, 114 bottom, 115 right side, 116 left side, 117 protrusion, 120 electrode, 121 negative electrode, 1 22 positive electrode , 123 Indifferent electrode, 130 Open / close cover, 131 Slot for external storage medium, 1 32 External storage medium, 140 Operation section, 141 Power button, 142 Measurement button, 143 Menu button, 144 Enter button, 145 Left school button, 146 Right scroll button, 1 48 Display, 150 Processing circuit, 151 Amplifier circuit, 152 Filter circuit, 153 Α / Ό converter, 155 Memory, 160 Power supply, 170 Timer, 190 Rubber, 191 Adhesive member, 19 2 Protective film o

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated.

[0016] (Appearance)

First, the external structure of the portable electrocardiograph in the present embodiment will be described. 1 and 2 are schematic perspective views of portable electrocardiograph 100 according to the embodiment of the present invention. 3 to 7 are a front view, a top view, a bottom view, a right side view, and a left side view, respectively, of the portable electrocardiograph 100 according to the present embodiment.

[0017] As shown in Figs. 1 to 7, portable electrocardiograph 100 according to the present embodiment has a size and weight that can be held with one hand so as to be excellent in handleability. It has been reduced in size and weight. The portable electrocardiograph 100 includes a device main body 110 having a flat and elongated substantially rectangular parallelepiped shape.

As shown in FIGS. 1 to 3, a measurement button 142 for instructing the start of measurement is provided near one end of the longitudinal direction (direction of arrow A in the figure) of the front surface 111 of the apparatus main body 110. ing. Further, a display unit 148 is provided near the other end of the front surface 111 of the apparatus main body 110. The display unit 148 is configured by a liquid crystal display, for example, and displays measurement results and the like. As shown in FIGS. 1 and 4, a power button 141 for instructing ONZOFF of the power supply 160 is arranged at a predetermined position on the upper surface 113 of the apparatus main body 110. Further, an opening / closing cover 130 as a lid is provided at a predetermined position on the upper surface 113 of the apparatus main body 110. The opening / closing cover 130 is provided so as to cover an external storage medium slot (not shown) in a closed state, and is attached to the apparatus main body 110 so as to be freely opened and closed.

[0020] As shown in FIGS. 1, 2, and 5, a menu button 143, an enter button 144, a left scroll button 145, and a right scroll button 146 are arranged at predetermined positions on the lower surface 114 of the apparatus main body 110. ing. Here, the menu button 143 is an operation button for instructing the display of the menu of the portable electrocardiograph 100, and the decision button 144 is an operation for executing a setting operation related to information displayed on the display unit 148. Button. The left scroll button 145 and the right scroll button 146 are operation buttons for scrolling and displaying the measurement result graph and guide information displayed on the display unit 148.

As shown in FIG. 1 and FIG. 6, the right side surface 115 located at one end in the longitudinal direction of the apparatus main body 110 is one electrode of a pair of measurement electrodes and is brought into contact with the subject's hand. A negative electrode 121 for the purpose and an indifferent electrode 123 for deriving a potential that becomes a reference for a potential change of the body are arranged. The right side surface 115 has a shape that is smoothly curved so that the index finger of the right hand of the subject fits when the subject takes a measurement posture described later. Further, the right side surface 115 is formed with a concave portion 115a that extends in the vertical direction. The recess 115a is shaped to receive the index finger of the subject's right hand.

[0022] The negative electrode 121 and the indifferent electrode 123 described above are formed of a conductive member. Further, the negative electrode 121 and the indifferent electrode 123 are arranged in a recess 115 a provided on the right side surface 115 so that the surfaces thereof are exposed on the outer surface of the apparatus main body 110. The negative electrode 121 is located near the upper surface 113 of the right side surface 115, and the indifferent electrode 123 is located near the lower surface 114 of the right side surface 115.

As shown in FIGS. 1 to 5, a protrusion 117 is provided on the left side surface 116 located at the other end in the longitudinal direction of the apparatus main body 110. The protruding portion 117 protrudes not only in the normal direction of the left side surface 116 but also in the normal direction on the front surface 111 and the rear surface 112 near the left side surface 116. [0024] As shown in FIG. 2 and FIG. 7, the left side surface of the protrusion 117 (surface in the same direction as the left side surface 116) is the other electrode of the pair of measurement electrodes, A positive electrode 122 is provided to contact the measurement site. Further, the electrode forming surface of the protruding portion 117 (the left side surface of the protruding portion 117) surrounds the measurement site with the positive electrode 122 in contact with the measurement site at a position surrounding the positive electrode 122! A member (hereinafter referred to as an “adhesion member”), for example, a rubber 190 is provided for contacting the body surface at the position (hereinafter referred to as “surrounding body surface”). Thus, by providing the rubber 190 at a position surrounding the positive electrode 122, the followability of the skin on the surface of the surrounding body can be improved during measurement. The rubber 190 has a contact surface 190a in contact with the surface of the surrounding body that has not only a larger friction coefficient than the contact surface 122a of the positive electrode 122 with the measurement site, but can also improve adhesion to the surface of the surrounding body. It is. For example, silicon rubber or urethane rubber is used as the material of rubber 190

[0025] In portable electrocardiograph 100 according to the present embodiment, frame-like rubber 190 is bonded in advance so as to come into contact with the electrode forming surface of protruding portion 117 and the side surface of protruding positive electrode 122. Has been.

[0026] The contact surface 190a of the rubber 190 with the surrounding body surface is formed at a force lower than the contact surface 122a of the positive electrode 122 with the measurement site or at substantially the same height. It is preferable. In portable electrocardiograph 100 in the present embodiment, the contact surface 190a of rubber 190 is formed at a lower height than the contact surface 122a of positive electrode 122.

In portable electrocardiograph 100 according to the present embodiment, device body 110 is provided with protruding portion 117, but a configuration in which protruding portion 117 is not provided is also possible. In this case, the left side surface 116 of the apparatus main body 110 serves as an electrode formation surface, and the positive electrode 122 and the rubber 190 are arranged in the same manner on the surface.

[0028] (Measurement posture)

Next, a state where the subject is measuring an electrocardiogram using the portable electrocardiograph 100 according to the embodiment of the present invention will be described. FIG. 8 is a perspective view showing the measurement posture of the subject, and FIG. 9 is a view of the measurement posture as viewed from above. [0029] As shown in Figs. 8 and 9, the subject 200 holds the device main body 110 of the portable electrocardiograph 100 near the one end of the device main body 110 with the right hand 210 while the protrusion 200 on the other end of the device main body 110 is The provided positive electrode 122 (contact surface 122a) is brought into direct contact with the skin (measurement site) on the fifth intercostal anterior fossa line located in the lower left part of the chest 250. As a result, the rubber 190 (the contact surface 190a thereof) is brought into close contact with the surrounding body surface (the body surface at a position surrounding the region where the positive electrode 122 is in contact). Then, the subject 200 presses the measurement button 142 provided on the front surface 111 of the apparatus main body 110 with the thumb 211 of the right hand 210. Then, while maintaining this state for about several tens of seconds, the cardiac radio wave shape is measured.

[0030] By taking such a measurement posture, the negative electrode 121 and the indifferent electrode 123 located on the right side surface 1 15 of the device body 110 of the portable electrocardiograph 100 contact the index finger 212 of the right hand 210 of the subject 200. Then, the positive electrode 122 (the contact surface 122a) located on the left side surface 116 of the apparatus main body 110 is in contact with the chest 250 of the subject 200. As a result, the right hand 210 in contact with the negative electrode 121, the non-contact forearm 220 on the chest 250, and the chest 250 in which the positive electrode 122 is in contact with the chest 250 through the non-contact upper arm 230 and the right shoulder 240 in this order. A measurement circuit is constructed on the subject's body.

[0031] (About configuration)

Next, a hardware configuration of portable electrocardiograph 100 in the present embodiment will be described. FIG. 10 is a block diagram of portable electrocardiograph 100 in the present embodiment.

Referring to FIG. 10, portable electrocardiograph 100 in the present embodiment mainly includes electrode unit 120, operation unit 140, and processing circuit 150. The electrode unit 120 is configured by the negative electrode 121, the positive electrode 122, and the indifferent electrode 123 described above. The operation unit 140 includes the power button 141, the measurement button 142, the menu button 143, the enter button 144, the left scroll button 145, and the right scroll button 146 described above.

The processing circuit 150 includes a circuit for processing so as to measure the bioelectric signal detected by the electrode unit 120 as an electrocardiographic waveform, and amplifies the bioelectric signal detected by the electrode unit 120. Amplifier circuit 151, bioelectric signal force detected by electrode 120, filter circuit 152 that removes noise components, AZD (Analog / Digital) converter 153 that converts analog signals to digital signals, and various calculations CPU (centra 1 processing unit) 154, a memory 155 having ROM (Read Only Memory) and RAM (Random Access Memory) for storing electrocardiogram information, and a timer 170 for outputting time data measured by the clocking operation to the CPU 154 With. Here, the amplifier circuit 151 differentially amplifies and outputs the output voltage signal (bioelectric signal) of the negative electrode 121 and the positive electrode 122 based on the output voltage signal of the indifferent electrode 123. Further, for the filter circuit 152, for example, a band pass filter having a pass band of 0.5 Hz to 35 Hz is used.

The processing unit 150 is connected to the electrode unit 120 and the operation unit 140 described above, and in addition to this, a display unit 148 and a power source 160 are connected. When an external storage medium is inserted into a slot for inserting an external storage medium, the external storage medium 132 is also connected to the processing circuit 150.

The CPU 154 performs an analysis process on the digital signal input from the AZD converter 153. In addition, the CPU 154 receives a command signal having various operation button forces included in the operation unit 140, and executes processing according to the received command signal. In addition, the CPU 154 executes writing and reading of information to and from the memory 155. In addition, the CPU 154 performs display control on the display unit 148.

[0036] (Operation)

FIG. 11 is a flowchart showing the flow of measurement processing in the portable electrocardiograph 100 of the present embodiment. The process shown in the flowchart of FIG. 11 is stored in advance in the ROM of the memory 155 as a program, and the function of the measurement process is realized by the CPU 154 reading and executing this program.

Referring to FIG. 11, when the power source 141 is pressed by the subject and the power is turned on, an operation check of the device is performed (step S2). Next, the CPU 154 displays a measurement guide on the display unit 148 (step S4). For example, as the measurement guide, information such as the posture that the subject test subject should take in the measurement is displayed.

[0038] Subsequently, when CPU 154 detects pressing of measurement button 142, CPU 154 measures an electrocardiogram waveform and analyzes the measured electrocardiogram waveform (steps S6 and S8). The electrocardiogram waveform that has been digitally signaled by the AZD converter 153 is temporarily recorded in the RAM of the memory 155. The analysis of the electrocardiogram is based on the digital signal ECG waveform, arrhythmia and myocardial ischemia. This is a process for detecting the presence / absence of a shape feature indicating etc., the presence / absence of a periodic feature indicating bradycardia, tachycardia, etc., the presence / absence of a waveform that cannot be analyzed due to noise, baseline fluctuation, etc. The measurement and analysis of the electrocardiographic waveform may be performed by a known procedure.

[0039] As a result of the waveform analysis, the CPU 154 determines whether the measured electrocardiogram waveform is stable, that is, whether there is an unanalyzable waveform (step S10). If it is determined that the electrocardiogram waveform is stable (YES in step S10), the process proceeds to step S12. On the other hand, if it is determined that the electrocardiogram is not stable (NO in step S10), the process proceeds to step S14.

In step S 12, the CPU 154 edits the analysis result of the electrocardiogram waveform into a message and displays the message on the display unit 148. At this time, the heart rate per unit time is also displayed along with the message. The heart rate can be obtained by a known procedure based on the electrocardiogram waveform. When step S12 is completed, the process proceeds to step S18.

Here, FIG. 12 shows a screen display example in step S12. In FIG. 12, the display 148 displays a message 167 indicating “There is no disturbance in the waveform” and heart rate data 163 indicating “60 beats Z minutes”. ing.

[0042] In step S14, CPU 154 displays on display unit 148 that the waveform analysis has been impossible and displays a message as to whether or not the measurement data can be stored. Next, in response to this message, it is determined whether or not the subject has chosen to save the measurement data (step S16). If saving of measurement data is selected (YES in step S16), the process proceeds to step S18. On the other hand, if discarding of measurement data is selected (NO in step S16), proceed to step S20.

[0043] In step S18, the CPU 154 performs processing for storing the measurement data. In other words, the CPU 154 associates the current date / time data input from the timer 170 with the electrocardiogram waveform data temporarily stored in the RAM and the analysis result, and stores them in a predetermined storage area of the memory 155. On the other hand, in step S20, the CPU 154 discards the measurement data.

[0044] When the process of step S18 or step S20 is completed, a series of measurement processes is terminated.

Note that the portable electrocardiograph 100 measures the electrocardiogram waveform stored in step S18. It has a function to read the fixed analysis result and display it on the display unit 148. FIG. 13 shows an example of a display screen of the measurement result of the electrocardiogram waveform stored in the memory 155. Referring to FIG. 13, at the start of display, a reduced waveform 162 of the entire waveform over the entire measurement period is displayed in the lower part of the screen, and an enlarged waveform 164 of, for example, 2 seconds is also displayed in the upper part of the display. Is displayed. Also, below the reduced waveform 162, a scale bar 165 indicating the length of the measurement period is displayed. On the scale bar 165, a pointer 166 for indicating which waveform the enlarged waveform 164 is in the measurement period is displayed. To change which waveform during the entire measurement period is displayed as the enlarged waveform 164, operate the right scroll button 146 and the left scroll button 145 to move the pointer 166 on the scale bar 165. It can be changed in seconds. When the subject confirms the electrocardiogram waveform on the screen of FIG. 13 and presses the enter button 144, the CPU 154 reads the analysis result data corresponding to the displayed electrocardiogram waveform from the memory 155 and edits it into a message. The edited message may be displayed on the display unit 148 as shown in FIG.

[0046] As described above, in portable electrocardiograph 100 according to the present embodiment, rubber 190 is disposed at a position surrounding positive electrode 122 (contact surface 122a thereof). Even if the hand or arm is lowered while holding the electrocardiograph 100 and a force exceeding a predetermined level is applied in a direction different from the pressing direction to the measurement site, the rubber 190 The displacement between the contact surface 190a and the surrounding body surface can be prevented. As a result, the adhesion between the contact surface 122a of the positive electrode 122 and the measurement site can be improved.

[0047] Thereby, contact stability between the positive electrode 122 and the measurement site can be improved, and variation in the measurement voltage value can be prevented. Therefore, with the configuration as described above, the electrocardiographic waveform can be measured accurately and stably.

[0048] In the present embodiment, the measurement site and body surface with which the positive electrode 122 is brought into contact are not limited to the force chest 250 described as being the chest 250, and the portable electrocardiograph 100 is provided. Any limbs or torso other than the gripping hand may be used.

[0049] (Modification)

As described above, in the present embodiment, the frame-like rubber 190 is disposed on the electrode forming surface of the protruding portion 117 so as to contact the side surface of the positive electrode 122. However, It is not limited to such a form as long as the rubber 190 is disposed so as to surround the positive electrode 122. Another arrangement example of the rubber 190 is shown in FIG.

For example, as shown in FIG. 14, the electrode-forming surface 117 a of the frame-like rubber 190 force protrusion 117 may be provided at a position away from the positive electrode 122. In this case, when the device main body 110 is viewed from the left side, the electrode forming surface 117a of the protrusion 117 and the electrode forming surface 117a between the positive electrode 122 and the rubber 190 can be seen from the outside.

[0051] Further, in the present embodiment, it is not necessary to surround all the directions of the side surface of the force positive electrode 122 in which the frame-shaped rubber 190 is disposed so as to completely surround the side surface of the positive electrode 122. That is, when the apparatus main body 110 is viewed from the left side, there may be a portion where the rubber 190 is not disposed on the electrode forming surface 117a of the protruding portion 117. Fig. 15 shows another arrangement example of rubber 190.

For example, as shown in FIG. 15, when the device main body 110 is also viewed from the left side, a rubber 190 divided into two parts may be provided at a position surrounding the positive electrode 122. More specifically, on the electrode forming surface 117a, the rubber 190 may be disposed in the periphery of the positive electrode 122 at a position excluding a part on the upper surface 113 side and a part on the lower surface 114 side.

[0053] Further, when the apparatus main body 110 is viewed from the left side, a plurality of dot-like rubbers 190 may be provided so as to surround the positive electrode 122! /.

In the present embodiment, the shape of the force contact surface 122a exemplifying the case where the positive electrode 122 has one substantially rectangular contact surface 122a is not particularly limited. Further, as shown in FIG. 16, the positive electrode 122 may have, for example, two contact surfaces 122a. In this case, when the apparatus main body 110 is viewed from the left side, the rubber 190 is preferably provided so as to surround both of the two contact surfaces 122a. Alternatively, in FIG. 16, the force positive electrode 122 shown as an example in which the positive electrode 122 has two contact surfaces 122a may have a plurality of contact surfaces 122a. In this case, the rubber 190 is preferably provided so as to surround all of the plurality of contact surfaces 122a.

[0055] In the present embodiment, the contact member itself arranged on the electrode forming surface of the protrusion 117 is the force described as the rubber 190. At least the contact surface force of the contact member with the surrounding body surface is formed by the rubber. It only has to be done. [0056] Further, in the present embodiment, the adhesion member may be a member that can maintain adhesion to the surface of the surrounding body with the force of rubber 190 formed of silicon rubber or urethane rubber as an example. For example, it may be a thermoplastic elastomer containing nitrile rubber or ethylene-propylene-gen rubber (EPDM) as a main component.

Alternatively, an adhesive member (hereinafter referred to as “adhesive member”) may be employed as the adhesion member. Here, FIG. 17 and FIG. 18 show how the adhesive member is arranged around the positive electrode 122.

[0058] As shown in FIGS. 17 and 18, the adhesive member 191 is preferably replaceable (detachable). The adhesive member 191 is made of, for example, a gel containing a crosslinked acrylic resin, a polyhydric alcohol water, and an electrolyte.

Further, as shown in FIG. 18, when the portable electrocardiograph 100 is not in use, both the contact surface 191a with the surrounding body surface of the adhesive member 191 and the contact surface 191b with the electrode forming surface 117a are both present. The protective film 192 is preferably provided respectively. The protective film 192 is a member for protecting the contact surfaces 191a and 191b of the adhesive member 191 and can be easily removed by the subject. The protective film 192 is made of, for example, a polyethylene laminate material or a polypropylene film.

[0060] With this configuration, the subject can freely replace the adhesive member 191 when the adhesive force of the contact surface 191a has deteriorated.

[0061] The adhesive member 191 may be a single layer or multiple layers as long as both the contact surfaces 191a and 191b are adhesive. When the adhesive member 191 is not replaceable, that is, when the contact surface 191b is bonded in advance to the electrode forming surface, at least the contact surface 191a only needs to have adhesiveness. Also in this case, it is preferable that the protective film 192 is provided on the contact surface 191a. Thus, the subject can prevent the deterioration of the adhesiveness on the contact surface 191a by attaching the protective film 192 to the contact surface 191a every time the measurement is completed.

[0062] The embodiment disclosed herein is illustrative in all respects and is not restrictive. The technical scope of the present invention is defined by the scope of the claims, and is intended to include any modifications within the scope and meaning equivalent to the description of the scope of the claims.

Claims

The scope of the claims

[1] a first electrode for contacting the subject's hand;

A second electrode for contacting a predetermined measurement site of the subject;

A measurement unit for measuring an electrical signal detected by the first electrode and the second electrode as an electrocardiographic waveform;

A housing including the first electrode, the second electrode, and the measurement unit, and the housing includes an electrode forming surface on which the second electrode is provided,

In the state where the second electrode is in contact with the measurement site at a position surrounding the second electrode on the electrode formation surface, a contact portion for contacting the body surface at a position surrounding the measurement site is further provided. A portable electrocardiograph.

[2] The contact portion has a contact surface in contact with the body surface,

The portable electrocardiograph according to claim 1, wherein the member constituting the contact surface is made of rubber or a thermoplastic elastomer.

[3] The contact portion has a first contact surface in contact with the body surface,

The portable electrocardiograph according to claim 1, wherein the member constituting the first contact surface has adhesiveness.

[4] A first protective member for protecting the first contact surface when not in use is further provided,

The portable electrocardiograph according to claim 3, wherein the first protective member is removable by the subject.

[5] The contact portion has a second contact surface in contact with the electrode forming surface.

5. The portable electrocardiograph according to claim 4, wherein the member constituting the second contact surface has adhesiveness.

[6] The portable electrocardiograph according to claim 5, further comprising a second protective member for protecting the second contact surface in a non-use state.