KR101008879B1 - Ecg electrode having motion artifact electrode - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrocardiogram electrode having an electrode for acquiring copper noise, wherein at least one electrode for acquiring copper noise is surrounded around each electrocardiogram sensor electrode to form a patch, and each electrode for acquiring noise is a sensor. By having the same structure as the electrode, but having a human-like material layer and an insulating film beneath the conductive film layer having properties similar to those of the human body, the copper noise generated from the sensor electrode is sensed by the electrode for acquiring copper noise and signal processing. By providing a means that can be canceled, there is an effect that can obtain a clear ECG signal even when the subject moves, such as movement.

Copper noise, electrocardiogram, electrode

Description

ECG ELECTRODE WITH ELECTRONIC NOISE ACQUISITION {ECG ELECTRODE HAVING MOTION ARTIFACT ELECTRODE}

The present invention relates to an electrocardiogram electrode, and more particularly, to an electrocardiogram electrode having an electrode for acquiring copper noise for removing the noise due to movement of a subject.

Heart disease is one of the leading causes of death recently. In order to prevent these diseases, it is necessary to routinely look at ECG (ElectroCardioGram) signals, especially in heart patients.

However, the electrocardiogram electrode currently used is vulnerable to the dynamic noise caused by the movement of the subject, so that there is a problem that the subject can hardly be measured in the state of movement such as movement.

One cause of the dynamic noise is the noise caused by the stretching of the skin, and as shown in FIG. 8, using the strain gauge 54, both ends 56 and 58 of the conductive foam during the stretching of the skin are used. Attempts have been made to monitor the change in resistance and reflect it in the ECG signal (US Pat. No. 5,978,693), but this does not correspond to the actual noise of the electrode as it moves with the skin, but is simply a signal that is assumed by computational processing. Reflecting this, there is no limit to eliminating the underlying dynamic noise.

Reference numeral 52 in FIG. 8 denotes a foam pad, 60 denotes a gauge lead wire, 62 denotes a strain gauge lead, 64 denotes an electrode, and 66 denotes a clip.

Therefore, in order to solve the problems of the prior art, the present invention is provided with one or more copper noise acquisition electrodes around the ECG sensor electrode, wherein the copper noise acquisition electrode is composed of a human body-like material, in the actual sensor electrode The purpose of the present invention is to provide an electrocardiogram electrode having an electrode for acquiring copper noise by capturing only the generated noise and then subtracting the measured noise from the sensor electrode by signal processing. .

In order to achieve the above object, an electrocardiogram electrode having an electrode for acquiring copper noise according to the present invention comprises at least one sensor electrode; One or more copper noise acquiring electrodes are surrounded by an insulator between the respective sensor electrodes and provided in a patch shape, wherein each sensor electrode comprises: a conductive coating layer; And an electrode plate in electrical contact with the conductive coating layer, wherein each of the copper noise acquisition electrodes has the same structure as each of the sensor electrodes, and has a human-like material layer having physical properties similar to those of the human body under the conductive coating layer. and; An insulating film is further formed below the human-like material layer.

The present invention is to surround the sensor electrode to obtain a copper noise acquisition electrode to form a patch, each of the movement noise acquisition electrode has the same structure as each sensor electrode, human body similar to the physical properties similar to the human body under the conductive coating layer By providing the material layer and the insulating film further, it provides a means to sense the copper noise generated from the sensor electrode in the electrode for acquiring the copper noise and to cancel it by the signal processing, so that the ECG signal is clear even when the subject moves, such as movement There is an effect that can be obtained.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

Figure 1 shows that the ECG can be measured even when the subject is in motion, the red point of the subject represents the point of the ECG patch (patch) attachment, the blue point represents the heart position.

Electrocardiogram refers to a graph of the time difference of the potential difference, or voltage, measured at different body parts of the biopotential generated during contraction of the heart. There are reference points or reference electrodes and active electrodes. The point closest to the heart (left arm) is the measurement point, and the point relatively close to the heart (right leg) is the reference point.

1 is also one or more sensor electrodes in one patch, which is a core technical idea of the present invention; At least one copper noise acquisition electrode is surrounded by an insulator interposed around each sensor electrode.

2 is a cross-sectional view illustrating a structure according to an embodiment when vertically cut along the line AA of FIG. 1.

FIG. 3 is an exemplary view illustrating a method of extracting each voltage signal from a sensor electrode and a noise obtaining electrode in the structure of FIG. 2, and FIG. 4 illustrates a signal processing of the ECG sensing signal Ve obtained in FIG. 3. The conceptual diagram showing that only the pure ECG voltage signal V can be obtained by removing the dynamic noise signal Vm by the method, and FIG. 5 is a block diagram illustrating the configuration of an ECG measuring system using the present invention.

6 is a perspective view showing a state in which one sensor electrode and one dynamic noise acquisition electrode are built in one patch, and FIG. 7 is a cross-sectional view of the main part of FIG. 6.

Therefore, referring to the accompanying drawings, referring to the configuration of an electrocardiogram electrode having an electrode for acquiring copper noise according to the present invention, basically, as shown in FIGS. 1 and 2, one or more sensor electrodes in one patch 110 and 120; One or more copper noise acquiring electrodes 210, 220 and 230 are surrounded by the insulator 50 between the respective sensor electrodes and provided in a patch shape. Each sensor electrode 110 is conductive. A film layer 13; And an electrode plate 14 in electrical contact with the conductive coating layer, wherein each of the copper noise acquiring electrodes 210 has the same structure as that of the respective sensor electrodes 110 and has a conductive coating layer 23. A human-like substance layer 22 having physical properties similar to that of the human body at the bottom; The insulating film 21 is further formed under the human-like material layer.

Here, the electrode plate 14 of each of the sensor electrodes is connected to the first electrically conductive layer 31 electrically connected via the via hole 15 as shown in FIG. The electrode plate 24 is connected via a via hole 25 to one second conductive layer 32 electrically connected with the first conductive layer 31 and the insulating layer 42 interposed therebetween. The human-like material layer 22 of the noise acquisition electrode is electrically connected to the human-like material layers adjacent to each other in a diagonal direction in FIG. 1, so that the sensing terminal is at least one patch (as shown in FIG. 2). At least three terminals are required, such as 3). In this case, when passing through another conductive layer (here, the first conductive layer) such as the via hole 25 for connecting the second conductive layer 32, after the via hole 25 is formed, the side is coated with an insulating material and then the second conductive layer is formed. The via hole 25 is filled by depositing a material so that the via hole 25 is not electrically connected to another conductive layer (first conductive layer).

However, in some cases, as shown in FIGS. 6 and 7, the electrode plates 14 of the respective sensor electrodes and the electrode plates 24 of the electrode for acquiring the copper noise are respectively lead wires 2 and 4 protruding outward. It may be connected to the connector 10, 20.

6 and 7 are formed of one sensor electrode and one copper noise acquisition electrode in patch 1, but are not limited thereto.

In the latter case, the human-like material layer 22 of each electrode for acquiring the copper noise is different from that in which the electrode plates 14 and 24 are connected to the separate connectors 10 and 20. It is preferable to be electrically connected to the adjacent human-like material layer in a diagonal direction. By doing so, the human-like substance layer 22 only needs one connection terminal 27. Reference numeral 40 is an insulating protective cover, 26 is a conductive connector for connecting the human-like material layer 22 and the connection terminal 27, and 3 is a copper noise sensing lead wire.

On the other hand, the human-like material layer 22 has properties similar to the human body (particularly, electrical resistance and flexibility), it is preferable that the conductive silicon or conductive carbon black.

Here, carbon black means soot produced by incomplete combustion of hydrocarbons such as natural gas, tar, oil, or the like, or carbon six-membered ring is formed by pyrolysis, followed by dehydrogenation. By the process of condensation, etc., a polycyclic aromatic compound is used to produce crystallites of carbon-hexagonal hexagonal net structure. Among the carbon blacks, conductive carbon blacks (or Ketjenblack> EC) which can obtain desired physical properties by adjusting the compounding material are preferable.

However, the human-like material layer 22 is sufficient as long as it has physical properties similar to the human body (particularly, electrical resistance and flexibility), and is not limited to the conductive silicon or the conductive carbon black.

In addition, the conductive coating layers 13 and 23 of the sensor electrodes and the electrodes for acquiring the copper noise are preferably hydrogels having conductivity and adhesion, and the sensors and the noise for acquiring the copper noise. The electrode plates 14 and 24 of the electrode are preferably silver-silver chloride (Ag-AgCl) or platinum (Pt), and the insulating film 21 is preferably an adhesive tape.

In particular, the insulating film 21 formed of the adhesive tape is attached to the entire surface except the sensor electrode, it is more preferable to increase the adhesion of the patch.

The ECG patch described above is attached to the left arm, the right arm, and the right foot (when used as a reference site and mainly the left foot when used as a measurement site), as shown in FIG. Only you will get.

The system for this may be implemented in various ways, but one example thereof is the block diagram of FIG. That is, the signal measured by the biosignal electrode (sensor electrode) is amplified by the biosignal processing unit, and the signal measured by the copper noise signal electrode (the copper noise acquisition electrode) is amplified by the dynamic noise signal processing unit, respectively. In accordance with the control signal of the control unit) is stored in the storage unit, the dynamic noise canceling unit is removed in accordance with the programmed signal processing method. The result is stored in the storage unit again, and according to the control signal of the controller to display only the pure ECG signal on the display unit.

The system can be miniaturized in the form of a wrist watch, and can be implemented without a lead wire by incorporating a wireless signal transmission technology. That is, only three ECG patches and a wristwatch-like signal analysis system are required.

As described above, although the preferred embodiment of the present invention has been described, the technical idea of the present invention can be variously implemented without being limited to the above embodiments, and such an implementation will be apparent to those skilled in the art without difficulty based on the above embodiments. Description thereof will be omitted.

1 is a view showing an electrocardiogram measurement patch (patch) that can be measured by electrocardiogram even when the subject is exercising according to an embodiment of the present invention.

2 is a cross-sectional view illustrating a structure according to an embodiment when vertically cut along the line AA of FIG. 1.

FIG. 3 is an exemplary view illustrating a method of extracting each voltage signal from a sensor electrode and an electrode for acquiring copper noise in the structure of FIG. 2.

FIG. 4 is a conceptual diagram illustrating that only a pure electrocardiogram voltage signal may be obtained by removing the dynamic noise signal from each signal obtained in FIG. 3 by a predetermined signal processing method.

5 is a block diagram illustrating an exemplary configuration of an electrocardiogram measuring system using the present invention.

FIG. 6 is a perspective view showing another embodiment of the present invention in which one sensor electrode and one electrode for acquiring dynamic noise are embedded in one patch. FIG.

FIG. 7 is a cross-sectional view illustrating main parts of FIG. 6. FIG.

8 is a view showing a method for removing noise in accordance with the prior art (US Pat. No. 5,978,693).

<Description of the symbols for the main parts of the drawings>

1: ECG patch 2, 3, 4: lead wire

10, 20: lead wire connector 13, 23: conductive coating layer

14, 24: electrode plate 15, 25: via hole

21: insulating film 22: human-like substance layer

26: conductive connector 27: connection terminal

31: first conductive layer 32: second conductive layer

41, 42: insulating layers 40, 43: insulating protective cover

50: isolation insulator 110, 120: sensor electrode

210, 220, 230: electrode for acquiring copper noise

Claims (5)

At least one sensor electrode; At least one copper noise acquisition electrode is surrounded by an insulator between the respective sensor electrodes and is provided in a patch shape. Each sensor electrode, A conductive coating layer; And an electrode plate in electrical contact with the conductive coating layer, Each of the electrode for acquiring copper noise has a structure similar to that of each of the sensor electrodes, and a human-like substance layer having physical properties similar to a human body under the conductive coating layer; Electrocardiogram electrode having an electrode for acquiring copper noise, characterized in that the insulating film is further formed under the human-like material layer. The method of claim 1, The electrode plate of each sensor electrode is connected to one first conductive layer electrically connected, The electrode plate of each of the copper noise acquisition electrodes is connected to one second conductive layer electrically connected with the first conductive layer and the insulating layer interposed therebetween, An electrocardiogram electrode having a copper noise acquisition electrode, wherein the human-like material layer of each of the copper noise acquisition electrodes is electrically connected to a human-like material layer of a neighboring copper noise acquisition electrode. The method of claim 1, An electrode plate of each of the sensor electrodes and an electrode plate of each of the copper noise acquisition electrodes are connected to lead wire connectors protruding from the outside, An electrocardiogram electrode having a copper noise acquisition electrode, wherein the human-like material layer of each of the copper noise acquisition electrodes is electrically connected to a human-like material layer of a neighboring copper noise acquisition electrode. 4. The method according to any one of claims 1 to 3, The electrocardiogram electrode having the electrode for acquiring copper noise, characterized in that the human-like substance layer is conductive silicon or conductive carbon black. The method of claim 4, wherein The conductive coating layer of each of the sensor electrode and the electrode for acquiring the copper noise is a hydrogel, The electrode plate of each of the sensor electrode and the electrode for acquiring copper noise is silver-silver chloride (Ag-AgCl) or platinum (Pt), The electrocardiogram electrode having an electrode for acquiring copper noise, wherein the insulating film is an adhesive tape.

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