JPH09122092A - Electrocardiogram recorder - Google Patents

Abstract

PURPOSE: To achieve a higher operability by a method wherein a unit for a patient is arranged with the outline thereof identical to a cassette tape and an A/D converter, a CPU, an IC memory, a D/A converter, a magnetic coupling part and the like are built therein to allow the using of a tape type analyzer. CONSTITUTION: The body 20 of an electrocardiogram recorder has a shape identical completely to an audio cassette and the unit is mounted on a tape reproducer 30 for reproducing electrocardiogram recording data. Only idling in holes 1 and 2 for rotating a tape, a capstan 3 is rotated by a rotating force energized from the side of the tape analyzer 30. An electrode 4 for a patient is connected to a connector 5 and an electrocardiographic signal detected by the electrode 4 for the patient sent through a socket 6 is amplified by an ECG amplifier 7. An D/A converter 10 is built in to convert data from a control circuit 8 arranged containing an A/D converter 8a and a CPU 8b and an IC memory 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrocardiogram recorder,
More specifically, it relates to an electrocardiographic recorder used in a portable Holter electrocardiographic system.

[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 electrocardiographic recorder having an external 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 one to two 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]

The above-mentioned conventional electrocardiographic recorder has the following problems. First, in the case of the tape system, there is a problem that the patient unit is large and heavy, which hinders daily life, and the tape system requires a tape for each patient. Next, in the case of the IC method, the patient unit is still large and heavy, which hinders daily life, and there is a problem that the analysis device is a dedicated type and cannot be used in the tape method.

The present invention has been made in view of the above problems, and an object thereof is to provide an electrocardiographic recorder having improved operability.

[0006]

SUMMARY OF THE INVENTION The present invention for solving the above-mentioned problems is a patient unit for a Holter electrocardiographic system, the external shape of which is the same as that of a cassette tape,
And inside thereof, an A / D converter for converting the reception signal from the patient electrode into a digital signal, an IC memory for storing the output of the A / D converter, and a CP for performing the overall control operation
U, a D / A converter that converts data read from the IC memory into an analog signal, and a magnetic coupling unit that receives the output of the D / A converter are provided.

[0007]

The patient unit (electrocardiogram recorder) itself has the same outer shape as the cassette tape, and the necessary circuits (IC memory etc.) are incorporated therein. With such a configuration, the tape-type analysis device can be used as it is, and a dedicated analysis device is not required. Thereby, the operability can be improved.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, 20 is an electrocardiogram recorder body (hereinafter simply referred to as a recorder body). As is clear from the figure, it has exactly the same shape as a commercially available audio cassette tape. Reference numeral 30 denotes a tape reproducing device which mounts this unit and reproduces electrocardiographically recorded data. In the figure, 1 and 2 are holes for rotating the tape (in the present invention, since the tape is not actually run, it is idle).
Reference numeral 3 is a capstan that is rotated by the rotational force applied from the tape analysis device 30 side.

Reference numeral 4 is a plurality of patient electrodes attached to the patient's body. Although only three electrodes are shown in the figure, as many electrodes as necessary are provided. Reference numeral 5 is a connector to which these patient electrodes 4 are connected, and 6 is a socket which meshes with the connector 5. An ECG 7 amplifies an electrocardiographic signal detected by the patient electrode 4 sent through the socket 6.
It is an amplifier (electrocardiographic amplifier). This ECG amplifier 7
The number of patient electrodes 4 is provided.

Reference numeral 8 is a control circuit including an A / D converter 8a, a CPU 8b and the like. As the number of bits of the A / D converter 8a, for example, about 8 to 12 bits are used. Reference numeral 9 denotes an IC memory (also referred to as a semiconductor memory) that stores electrocardiographic data, and its capacity is, for example, about 64 Mbits. Reference numeral 10 is a D / A converter that converts the data read from the IC memory 9 into an analog signal.

Reference numeral 11 is a magnetic coupling section that receives the output of the D / A converter 10 and converts it into a magnetic signal. This magnetic coupling part 1
By providing 1, the same effect as reproducing the magnetic tape can be produced. Reference numeral 12 is an operation switch including a start button, a stop button, a mode change switch, and the like, 13 is a rotation sensor that detects the rotation of the capstan 3 and notifies the control circuit 8, and 14 is a battery that supplies power to the recorder body 20. Is. The battery 1
As 4, a high capacity alkaline dry battery, a rechargeable battery, or the like is used.

In the tape analysis device 30, 31 is a reproducing head for reading a signal from the magnetic coupling portion 11 and reproducing it as an analog signal, and 32 is an amplifier for amplifying the output of the reproducing head 31. The operation of the device configured as described above will be described below. (Recording Operation) The mode of the recorder main body 20 at this time is set to the recording mode by operating the operation switch 12. When the patient electrodes 4 are attached to the patient and the condition of the heart is being monitored, each patient electrode 4 generates an electric signal corresponding to the attachment location. This electric signal (ECG signal) enters the ECG amplifier 7 via the connector 5 and the socket 6,
Amplified. This amplified signal is A in the control circuit 8.
It enters the / D converter 8a and is converted into a digital signal.
The CPU 8b controls the operation of the A / D converter 8a and stores the output of the A / D converter 8a in the IC memory 9. (Regeneration Operation) The patient electrode 4 is removed from the patient, and the connector 5 is removed from the socket 6. Next, the operation switch 12 is operated to change the recorder body 20 from the recording mode to the reproduction mode. The recorder body 20 is replaced with the tape reproducing device 30.
Attach to The tape reproducing device 30 recognizes the recorder body 20 as a tape and starts the rotation operation of the tape.

As a result, the capstan 3 starts to rotate. The rotation sensor 13 detects the rotation of the capstan 3 and notifies the control circuit 8 of the rotation. The CPU 8b gives a read command to the IC memory 9 according to the rotation speed of the capstan 3 detected by the rotation sensor 13 (that is, according to the reproduction speed of the tape analysis device 30) to read the electrocardiogram data.

The read electrocardiographic data enters the D / A converter 10 and is converted into an analog signal. The output of the D / A converter 10 enters the magnetic coupling unit 11. The magnetic coupling unit 11 supplies the reproducing head 31 of the tape analysis device 30 with the electrocardiographic data in the same manner as when reproducing the electrocardiographic data from the tape. The electrocardiogram signal reproduced by the reproducing head 31 is amplified by the amplifier 32 and then enters a predetermined processing circuit for analysis.

At the time of reproduction, it is necessary to access the IC memory 9 at a higher data rate than that at the time of recording (for example, when reading data recorded for 24 hours in 30 minutes, the speed is increased by about 50 times). For this reason,
The power consumption of the battery 14 increases. As a result, there is a possibility that the battery will not hold until the data is read from the IC memory 9. In order to solve such a problem, a contact is provided between the recorder main body 20 and the tape analysis device 30, and the recorder main body 20 is connected from the tape analysis device side through this contact.
Power can be supplied to the side.

It is also possible to use a rechargeable battery as the battery 14 and charge the battery 14 with the electric power obtained through the same contact.

[0017]

As described above in detail, according to the present invention, the electrocardiogram recorder main body has the same shape as a commercially available cassette tape, and an IC memory is provided therein to record electrocardiographic data, and at the time of reading, It is possible to provide an electrocardiogram recorder with improved operability by being configured so that it can be read out by the tape analysis device.

[Brief description of the drawings]

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

[Explanation of symbols]

 1, 2 Tape rotation hole 3 Capstan 4 Patient electrode 5 Connector 6 Socket 7 ECG amplifier 8 Control circuit 8a A / D converter 8b CPU 9 IC memory 10 D / A converter 11 Magnetic coupling part 12 Operation switch 13 Rotation Sensor 14 Battery 20 ECG recorder main body 30 Tape analysis device 31 Playback head 32 Amplifier

Claims (3)

[Claims] 1. A patient unit of a Holter electrocardiographic system, the external shape of which is the same as that of a cassette tape, and an A / D converter for converting a received signal from a patient electrode into a digital signal inside thereof. , An IC memory that stores the output of the A / D converter, a CPU that performs overall control operation, a D / A converter that converts the data read from the IC memory into an analog signal, and the D / A An electrocardiogram recorder, comprising: a magnetic coupling section that receives the output of the converter. 2. The electrocardiographic recorder according to claim 1, wherein when the electrocardiographic recorder is attached to the tape analysis device and a signal is reproduced, the power of the electrocardiographic recorder is supplied from the tape analysis device side. . 3. The electrocardiographic recorder according to claim 1, wherein the timing of reading the data stored in the IC memory of the electrocardiographic recorder is read according to the rotation speed of the capstan.