JPH06197878A - Electrocardiographic system - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to an electrocardiographic measurement system, and an object thereof is to provide an electrocardiographic measurement system that does not require wiring from a patient electrode to a patient unit. [Structure] An electrode unit having a built-in wireless telemeter transmitter is used as a patient electrode attached to a predetermined plurality of locations on a human body, and a conductive portion drawn out from these electrode units attached to the human body is a conductive conductor film. And a common electric potential, and receives the electrode electric potential signals wirelessly transmitted from these electrode units and outputs the primary coupling as an electrocardiographic signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrocardiographic measuring system, and more particularly to an electrocardiographic measuring system in which electrode wiring is eliminated.

[0002]

2. Description of the Related Art Conventionally, an electrocardiograph has been used to examine the function of the heart of a patient. In recent years, a Holter electrocardiograph having an outer shape similar to that of a portable cassette tape recorder has been developed, and it has been put on a patient to record an electrocardiogram for about 1 to 2 days. This type of electrocardiographic recorder regularly measures the patient's heartbeat and records it in a built-in recording device. Then, when the recorded electrocardiogram is reproduced, the reproduction is performed by using a dedicated analysis device to diagnose the heart function.

There are roughly two types of conventional Holter electrocardiographic systems. Tape system In this system, an audio cassette tape is attached to a patient unit in the shape of a small portable cassette tape recorder (for example, Walkman (registered trademark) manufactured by Sony Corporation) to record an electrocardiogram. Next, the cassette tape, for which recording has been completed, is mounted in the analysis device, and is reproduced at high speed for analysis. IC system In this system, an IC memory is built in a patient unit in the shape of a small portable cassette tape recorder, and an electrocardiogram is recorded in this IC memory. Next, this unit is mounted on a dedicated analysis device for analysis.

[0004]

In the above-mentioned conventional Holter electrocardiograph, wiring is indispensable from the patient electrode attached to the body surface of the patient to the patient unit. This wiring arrangement is annoying to the patient. Here, if the wiring from each electrode is made into a collective lead wire system, only one set of lead wires circulates around the body. This reduces annoyance, but still leaves less freedom.

In order to improve such a problem, a method of passing the wiring of the patient electrode through the clothes has been considered. With this method, the wiring is not visible at first glance, but that is still annoying.

The present invention has been made in view of the above problems, and an object thereof is to provide an electrocardiographic measurement system which does not require wiring from the patient electrode to the patient unit.

[0007]

According to the present invention for solving the above-mentioned problems, a wireless telemeter transmitter is built in as a patient electrode attached to a plurality of predetermined positions of a human body, and
The conductive parts drawn out from these patient electrodes attached to the human body are commonly covered with a conductive conductor film to have a common potential, and the electrode potential signals wirelessly transmitted from these patient electrodes are received to obtain a primary signal. It is characterized in that it is configured with a wireless receiving unit that outputs the coupling as an electrocardiographic signal.

[0008]

In the electrode unit structure including the patient electrode and the wireless telemeter unit, the wireless reception unit wirelessly sends the electrocardiographic signal from each electrode unit. With such a configuration, wiring between the patient electrode and the patient unit is unnecessary, and the patient is not annoyed.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the principle of the present invention. In the figure, 1 is a human body, 2 is a human body surface, 3 is a function electrode attached at a plurality of predetermined positions on the body surface 2, and 4 is the function electrode 3.
Is a telemeter unit that is connected to and wirelessly transmits the sampled electrode potential signal. The telemeter unit 4 is an ECG amplifier for amplifying an electrode potential signal collected from the function electrode 3, the EC
It is composed of a wireless transmission unit that wirelessly transmits the output of the G amplifier.

The electrodes 3 and the telemeter section 4 constitute an electrode unit 10. Reference numeral 5 is a conductive portion drawn out from the electrode unit 10, and 6 is a conductive film electrically connected to the conductive portion 5. 7 is an insulating cloth, and the conductor film 6 is provided on the surface thereof. Therefore, the electrode potential signals observed with reference to the conductor film are wirelessly transmitted from the plurality of electrode units 10.

Reference numeral 8 is a radio receiving unit for receiving the electrocardiographic signals transmitted from the plurality of telemeter units 4. The electrocardiographic signal is a potential difference signal at at least two points on the surface of the human body. Therefore, in order to extract the electrocardiographic signal, it is necessary to detect the electrode potential signal from at least two points.

When the detection signals from the two telemeter units 4 having the common reference potential as described above enter the radio receiving unit 8, the radio receiving unit 8 typically uses an inductive type as a potential difference signal between these two points. To obtain a defined electrocardiographic signal and send it to a patient unit (not shown). In some cases, a derivation definition formula of a form in which three or more electrodes and a telemeter unit are used to obtain a primary combination of the electrode potentials thereof may be used. The wireless receiver 8 may be integrated with the patient unit. The patient unit may be belted to the patient's waist or pocketed. The patient unit (Holter electrocardiograph) stores the received electrocardiographic signal in a tape or an IC memory.

According to the present invention, the detection signal from the electrodes installed at various points on the surface of the human body is wirelessly notified to the patient unit by a telemeter. Therefore, wiring does not have to run between the patient electrode and the patient unit, and the patient's burden (annoyance) is reduced.

FIG. 2 is an electric circuit diagram showing an embodiment of the present invention. The same parts as those in FIG. 1 are designated by the same reference numerals. The electrode potential signals detected by the electrodes 3 contacting the human body surface 2 enter the telemeter unit 4. The telemeter unit 4 is covered with a shield 11. Telemeter section 4
Is an ECG amplifier 4a, a signal transmitter 4b and an antenna 4c
It is composed of. Although not shown, a battery for operating these circuits is also included. The common line of the telemeter unit 4 is connected to the common potential line 12 as shown in the figure.

The electrode potential signal from each telemeter unit 4 is
After being modulated, it is transmitted from the antenna 4c as a radio signal. Here, the frequencies of the radio signals transmitted from the respective telemeter units 4 are different. For example, the transmission signal frequency of the first telemeter is 890.2.
5 MHz, the transmission signal frequency of the second telemeter is 89
0.50 MHz and so on are used.

The radio signal modulated by each electrode potential signal is
The signals are detected by the antenna 8a of the wireless receiver 8 and are received and demodulated by the channel receiver 8b. If the reception frequencies of the respective channel receivers 8b are made different, it is possible to receive and demodulate radio signals transmitted from different telemeter units 4. The electrocardiographic signal amplified by each channel receiver 8b enters the subsequent differential amplifier 8c, and the difference is amplified. The amplified signal enters the patient unit (not shown) as an electrocardiographic signal and is stored in the storage means.

FIG. 3 is a diagram showing an example of the structure of clothes used in the present invention. (A) is an overall view, (b) is an electrode unit 10
It is a figure which shows the attachment state of. In (a), a hole 21 for mounting the electrode unit 10 is formed at a predetermined position in the clothes 20. The position of this hole 21 corresponds to the position where the patient electrode is attached. Then, the garment has a front surface made of a conductive material and a back surface made of an insulating material.

In (b), 10 is an electrode unit,
It has a disk shape. A contact electrode 3 is provided on the bottom surface of the electrode unit 10 and is in contact with the human body surface 2. The surface of the electrode unit 10 is made of a conductive material, and the telemeter unit 4 is included therein. The electrode unit 10 is fitted into a hole 21 provided in the garment 20 as shown in the figure so that the surface of the electrode unit 10 contacts the conductor film 6 on the surface of the garment 20. As a result, the plurality of electrode units 10 fitted into the clothes 20 have a common line in common. The central portion of the electrode unit 10 serves as an antenna for a wireless telemeter.

Since the back surface of the conductor film 6 is the insulating cloth 7, the human body surface 2 does not come into contact with the common line. Here, the conductor film 6 may cover the entire surface of the garment 20, but the conductor may run on the surface of the garment 20 in a mesh shape. And in the case of a mesh,
Depending on the size of the mesh, it is possible to block the DC component and the commercial frequency component while allowing the electromagnetic field of the radio signal to be used to pass.

FIG. 4 is a diagram showing another configuration example of the present invention. The same parts as those in FIG. 3 are designated by the same reference numerals. In this embodiment, the electrode unit 10 is provided without making holes in the clothes.
Glue the conductive material 26 to the part where is attached,
A conductive protrusion 25 is provided on the side of the electrode unit 10 corresponding to the conductive material 26, and the conductive protrusion 25 and the conductive material 26 are provided.
It is configured to be electrically connected to the conductor film 6 via. With this structure, it is not necessary to make a hole in the clothes.

In the figure, 28 is an insulator arranged so as to surround the electrode unit 10, and 27 is an adhesive attached to the bottom surface of the insulator 28. An insulator 28 is attached to the human body surface 2 with the adhesive 27. Thereby, the electrode unit 10 can be fixed to a specific position on the surface of the human body. An electrolytic solution is interposed between the contact electrode 3 and the corresponding human body surface, so that the conductivity between the human body surface and the human body surface is well maintained.

FIG. 5 is a diagram showing another configuration example of the present invention. In this embodiment, as the garment 20, a conductive belt runs vertically and horizontally, and the conductive belt portion is brought into contact with the common potential contact portion provided in the central portion of the telemeter portion 4 so that the electrode The unit 10 shares a common electric potential. The telemeter unit 4 and the function electrode 3 are joined to each other via the fitting portions provided in the respective central portions.

Although various configurations have been described above, according to the present invention, the potential difference between each electrode and the common potential is individually transmitted to the radio receiving unit 8 via the telemeter system. Therefore, the receiving side receives each of them and demodulates them to derive the relative potential difference or the primary coupling of the potentials of the respective electrodes to obtain the target electrocardiographic signal. Here, there will be receivers with different frequencies in one receiving system by the number of electrodes, ie, the number of telemeter transmitters. Although the number of receivers increases,
Since it is more annoying for the patient to run the signal wiring around the body, an increase in the number of receivers is not a problem compared to the annoyance. It goes without saying that one antenna may be shared by the receiving side antennas 8a and 8b.

[0024]

As described above in detail, according to the present invention, it is possible to provide an electrocardiographic measurement system that does not require wiring from the patient electrode to the patient unit, and the patient's trouble is eliminated. To be done.

[Brief description of drawings]

FIG. 1 is a principle configuration diagram of the present invention.

FIG. 2 is an electric circuit diagram showing an embodiment of the present invention.

FIG. 3 is a diagram showing a configuration example of clothing used in the present invention.

FIG. 4 is a diagram showing another configuration example of the present invention.

FIG. 5 is a diagram showing another configuration example of the present invention.

[Explanation of symbols]

 1 Human body 2 Human body surface 3 Function electrode 4 Telemeter part 5 Conductive part 6 Conductive film 7 Cloth 8 Radio receiving part

Claims (5)

[Claims] 1. An electrode unit incorporating a wireless telemeter transmitter as a patient electrode attached to a plurality of predetermined positions of a human body, and a conductive portion drawn from these electrode units attached to the human body is made of a conductive material. An electrocardiographic measurement system that includes a wireless reception unit that receives the electrode potential signals wirelessly transmitted from these electrode units and outputs the primary coupling as an electrocardiographic signal while covering them with a common potential by a conductor film in common. . 2. A garment worn by a patient is provided with a hole for attaching an electrode unit at a position corresponding to a body surface position of the patient to which the electrode unit is attached, the surface thereof is covered with a conductive material, and an insulating material is provided as a back surface. The electrocardiographic measurement system according to claim 1, wherein the electrocardiographic measurement system is used. 3. The conductive material for covering the surface of the clothes has a structure in which the conductors run in a mesh shape so that a radio transmission signal to be used is allowed to pass even if a direct current component or a commercial frequency component is blocked. The electrocardiographic measurement system according to claim 2. 4. The heart according to claim 2, wherein an antenna for a wireless telemeter is made to emerge from the hole of the clothes, the periphery of the hole is covered with a conductive material, and these potentials are set to a common potential. Electric measurement system. 5. The wireless receiver is provided with at least the same number of channel receivers as the electrode units, and the biopotential distribution at the position of each electrode is obtained from the output of each receiver. The electrocardiographic measurement system according to claim 1.