JPH0731602A - Portable long-time electrocardiogram recorder - Google Patents

Abstract

PURPOSE:To upgrade the quality of a waveform and to enable multi-channel long-time recording and preservation of more data by recording electrocardiograms into a hard disc device allowed to load or unload by a digital signal. CONSTITUTION:This portable long-time electrocardiogram recorder is made up of a case body 7, electrodes 1, 2, 3 and 4 which are arranged outside the case body 7 to induce an electrocardiogram signal closely on a skin surface of an organism, a hard disc device 6 allowed to load or unload and a hard disc 6A which is allowed to load on or unload from the hard disc device 6 to record an electrocardiogram signal induced through the electrodes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable electrocardiogram long-term recording device, and more particularly to a portable electrocardiogram long-term recording device for recording multi-channel electrocardiograms on a removable hard disk device instead of an IC memory.

[0002]

2. Description of the Related Art In general, a portable electrocardiogram long-term recording device is a recording device for recording an electrocardiogram of a heart disease patient for a long time while being mounted on the body. It is well known that the electrocardiogram of a patient with heart disease is usually recorded by an electrocardiograph installed in a hospital. However, the electrocardiogram obtained by this electrocardiograph was recorded within a very short time and in a state where the patient was at rest. Arrhythmia, which is a typical example of heart disease, has a normal pulse (60 to 100 /
Minutes) faster or slower or atrial, nodular, on ECG
Ventricular rhythm abnormalities are seen and the range is very wide. Therefore, it is often the case that an arrhythmia that occurs as a seizure cannot be easily detected only by an electrocardiogram recorded for a short time by the normal electrocardiograph. Further, the degree of paroxysmal angina and the load of the heart in daily life during rehabilitation cannot similarly be easily judged only from the electrocardiogram recorded in a short time in a rest state. In order to solve this, what has been frequently used from the past is a recorder that attaches to the body of a patient and records an electrocardiogram in a state where a load is applied for a long time of 24 hours while living a daily life, A Holter electrocardiograph comprising a regenerator for reproducing the recorded stress electrocardiogram offline. The present invention relates to a portable electrocardiogram long-term recording device corresponding to the above recorder. A conventional portable electrocardiogram long-time recorder is shown in FIG.
, The electrodes 100, 200, 300, 400,
500 and built-in IC for recording electrocardiogram induced from the electrode
A memory 600 is provided. The patient wears the case body 700 of this portable electrocardiogram long-term recording device with a band (not shown).
The electrode 100-500 is attached to the body via the skin, and the electrocardiogram derived from the electrode 100 or the like is stored in the IC memory 600 for a long time while actually living from getting up to going to bed. Record by digital signal. After the electrocardiogram is recorded in the IC memory 600, the case body 7 in which the IC memory 600 is built
If the patient takes 00 to the hospital at a later date, the doctor will play the regenerator 1.
By connecting the case main body 700 to 000 with the cord 800, the electrocardiogram recorded in the built-in IC memory 600 is reproduced on the recording paper 2000, and the symptom of the heart disease of the patient is analyzed.

[0003]

In the above-mentioned prior art (FIG. 3), the recording means for recording the electrocardiogram has a built-in IC.
The memory 600 has the following problems. (1) As is well known, the IC memory 600, which is a conventional recording means, has a small storage capacity. Therefore, conventionally, an electrocardiogram derived from the living body of a patient is stored in the IC memory 6
It was forced to be recorded in the state of being compressed to 00, and the waveform quality was poor. (2) Further, since the conventional IC memory 600 has a small storage capacity, it is difficult to record an electrocardiogram having more channels and a longer time. For example, 12-channel recording and 48-hour recording are difficult. (3) Further, the IC memory 600 is built in the case body 700 as described above. Therefore, the electrocardiogram of the next patient cannot be recorded in the IC memory 600 until after the electrocardiogram of one patient is reproduced (FIG. 3).
Therefore, it is an object of the present invention that it is difficult to store a large amount of data, and in a portable electrocardiogram long-term recording device, by recording an electrocardiogram in a removable hard disk device as a digital signal, waveform quality is improved. In addition to enabling the multi-channel long-time recording, it is also possible to store a large amount of data.

[0004]

Means for Solving the Problems The above-mentioned problems are solved by a case main body 7 and electrodes 1, 2, 3, 4 arranged outside the case main body 7 for inducing an electrocardiogram signal in close contact with a skin surface of a living body.
A portable electrocardiogram long-term recording device comprising a removable hard disk drive device 6 and a hard disk 6A which is removable from the hard disk drive device 6 and records electrocardiographic signals induced via electrodes. Will be solved.

[0005]

As described above, according to the present invention, the electrodes 1, 2,
The electrocardiogram signal induced via 3 and 4 was recorded on the removable hard disk 6A instead of the conventional IC memory 600 (FIG. 3), and this hard disk 6A was made removable on the hard disk drive 6. Since the hard disk 6A has a larger storage capacity than the IC memory 600, it is not necessary to compress and record the electrocardiogram signal. Therefore, the waveform quality is improved, and it is possible to record the electrocardiogram signal of more channels and for a longer time such as 12-channel recording or 48-hour recording. Further, the hard disk 6A is removable from the hard disk drive device 6, and the hard disk drive device 6 is also removable. Therefore, by replacing with a new hard disk 6A, the electrocardiographic signal of the next patient can be recorded, and without reproducing the electrocardiographic signal recorded in the original hard disk 6A,
More data can be stored.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings by way of embodiments. FIG. 1 is a diagram showing an embodiment of the present invention and shows a case of a two-channel portable electrocardiogram long-term recording device. In FIG. 1, reference numerals 1, 2, 3, 4
Is an electrode, 6 is a hard disk device, 6A is a hard disk, and 7 is a case body.

The case body 7 is made of, for example, plastic and has a rectangular parallelepiped shape as a whole. The drive circuit 10, the power source 12 and the like (FIG. 2) are built in, and the lid 72 is fixed with screws 72A and 72B. However, when the built-in component fails, the component can be replaced by opening the lid 72.

The electrodes 1, 2, 3, and 4 are conductors that are in close contact with the skin surface of the living body of the patient to induce an electrocardiographic signal, and the case body 7 is provided through the induction codes C1, C2, C3, and C4.
It is connected to the drive circuit 10 (FIG. 2) built in. Also, in the illustrated embodiment, another electrode E connected to the cord C5 is provided, which is the electrode 1,
By sticking to the skin surface of living body in the same manner as 2, 3, 4,
Acts as a ground for the drive circuit 10 (FIG. 2).

The hard disk 6A has electrodes 1, 2,
It is a recording means for digitally recording the electrocardiogram signal induced via the 3 and 4, and replaces the IC memory 600 (FIG. 3) which is the conventional recording means. The hard disk 6A is removable from the hard disk drive device 6 (arrow B) and has a storage capacity of, for example, 40 to 10
It is 0 megabytes. An opening 5 is provided on the side surface 71 of the case body 7 (FIG. 1), and as shown by an arrow A, the hard disk drive device 6 can be easily attached and detached through the opening 5. ing. Further, the hard disk 6A and the hard disk drive device 6 constitute a hard disk device.

FIG. 2 is a diagram showing a drive circuit for operating the embodiment of the present invention. In FIG. 2, reference numeral 1
0 is a drive circuit, 10A is a first electrocardiographic amplifier, and 10B is a second
An electrocardiographic amplification unit, 10C is an A / D conversion unit, 10E is a system control unit, 6 is a hard disk drive, and 6A is a hard disk. The first electrocardiographic amplification unit 10A includes the electrode 1,
This is a device for amplifying by taking the difference between the electrocardiogram signals S1 and S2 of the minute potential (about 1 mV) derived from 2 and outputting the amplified electrocardiogram signal S5. Similarly, the second electrocardiographic amplification unit 10B is a device that outputs the amplified electrocardiographic signal S6 by taking the difference between the electrocardiographic signals S3 and S4 of the minute potential (about 1 mV) induced from the electrodes 3 and 4. is there.

The A / D converter 10C is a device for inputting amplified electrocardiogram signals S5 and S6 which are analog signals, converting them into digital signals, and outputting digital amplified electrocardiogram signals S7 and S8.

The system control unit 10E is, for example, C
It is composed of a PU, receives the amplified electrocardiogram signals S7 and S8, performs predetermined processing for analysis such as heart rate calculation and recording in the hard disk 6A, and controls the overall operation, and performs post-processing signal S9. , S10 are output devices.

By inputting the signals S9 and S10 output from the system control unit 10E, the hard disk 6A digitally outputs the electrocardiogram signals induced via the electrodes 1, 2, 3 and 4, as described above. It is recorded as a signal and can be attached to and detached from the hard disk drive device 6 (arrow B).

The operation of the above embodiment (FIG. 1) will be described below with reference to FIG. First, the hard disk drive device 6 with the hard disk 6A attached (arrow B) is opened 5
To the case body 7 (arrow A), and by fitting this into the connector 8, the hard disk drive device 6 is housed in the case body 7, and electrodes 1, 2, 3 for inducing an electrocardiogram signal, 4 and the grounding electrode E (FIG. 1) are brought into close contact with the skin surface of the patient's body, and the power switch operating unit 11 shown in FIG.
1 is closed, the voltage Vc of the power supply 12 is applied to each part of the drive circuit 10, and the drive circuit 10 starts to operate.

The electrocardiographic signals S1, S2 and S3, S4 induced by the electrodes 1, 2 and 3, 4 are transferred to the first electrocardiographic amplifier 10.
A and the second electrocardiographic amplification unit 10B are respectively input, the differences between the electrocardiographic signals S1 and S2, S3 and S4 are amplified, and amplified electrocardiographic signals S5 and S6 are output. Amplified electrocardiogram signal S
5 and S6 are input to the A / D conversion unit 10C and digitally converted, and digitally amplified electrocardiogram signals S7 and S8 are output. The digitally amplified electrocardiogram signals S7 and S8 are input to the system control unit 10E, subjected to various analyzes and processing, and then input to the hard disk drive device 6 as signals S9 and S10, and recorded on the hard disk 6A attached thereto. To be done. After the electrocardiogram signal is recorded, the hard disk drive 6 is pulled out from the connector 8 and taken out from the case body 7 through the opening 5 (arrow A), and only the hard disk 6A is pulled out (arrow B). When taken to a doctor, the recorded electrocardiogram signal is reproduced by a regenerator (not shown).

The reproduced electrocardiographic signal has good waveform quality and can be recorded on a multi-channel long time such as 12-channel recording or 48-hour recording, and is recorded on the removable hard disk 6A.
A lot of data can be saved by exchanging. In the embodiment of FIG. 1, a two-channel portable electrocardiogram long-term recording device has been described, but the present invention is not limited to this, and is not limited to one channel.
Generally, it is applicable to a multi-channel portable electrocardiogram long-term recording device.

[0017]

As described above, according to the present invention, the case body 7 and the electrodes 1, 2, 3, 4 arranged outside the case body 7 and closely contacting the skin surface of the living body to induce an electrocardiographic signal.
And a hard disk drive device 6 that is removable, and a hard disk 6A that is removable from the hard disk drive device 6 and that records an electrocardiogram signal induced via electrodes. The technical means of recording devices was taken. According to this configuration, the electrocardiogram signal induced via the electrodes 1, 2, 3, 4 can be recorded in the removable hard disk 6A. This hard disk 6A is stored in the IC memory 600. ． And since the storage capacity is large, it is not necessary to record the electrocardiogram signal in compression,
12 channel recording and 48
It is possible to record an electrocardiogram signal of multiple channels and for a long time, such as time recording. Also, hard disk 6
A is attachable to and detachable from the hard disk drive device 6, and the hard disk drive device 6 is also attachable and detachable. Therefore, if the hard disk 6A is replaced with a new one, the electrocardiographic signal of the next patient can be recorded without reproducing the electrocardiographic signal recorded in the original hard disk 6A, and more data can be stored. That is, in the portable electrocardiogram long-term recording device, by recording the electrocardiogram in a removable hard disk device as a digital signal, the waveform quality is improved, multi-channel long-time recording is enabled, and much data can be stored. The technical effect of making it possible is to be achieved.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a drive circuit for operating an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 1, 2, 3, 4 electrodes 6 hard disk drive 6A hard disk 7 case body

Claims (2)

[Claims] 1. A case body 7, electrodes 1, 2, 3, 4 which are arranged outside the case body 7 and are in close contact with a skin surface of a living body to induce an electrocardiogram signal, and a removable hard disk drive device 6. A portable electrocardiogram long-time recording apparatus, comprising: a hard disk 6A which is removable from the hard disk drive 6 and records an electrocardiogram signal induced through electrodes. 2. The portable electrocardiogram long-time recording according to claim 1, wherein an opening 5 is provided on a front surface 71 of the case body 7, and the hard disk drive device 6 can be attached and detached through the opening 5. apparatus.