JPH1099286A - Portable electrocardiograph - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record electrocardiographic data securely in a few chances of a patient who has a subjective symptom of intense pain even though only few, by providing a power ON/OFF switch to start/finish electrocardiographic signal recording. SOLUTION: This cardiograph main body 1 has a cell storage part 2, a socket 3 to play a role of a connector for interface to connect with an external analyzer, and a switch 4 to start/finish recording. The switch 4 also works to control a power source and a clock and is placed on the upper face of the main body 1 so as to enable to perform ON/OFF operation through a shirt, etc., in a condition fitting the main body on a user's body. A user fits the electrocardiograph on his/her body by him-/her-self. When an attack such as an intense pain occurred, the user (a subject) turns the switch 4 ON to start recording electrocardiographic information data in a memory. Then immediately he/she goes to a medical organization and can have a doctor analyze and diagnose.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable electrocardiogram information recording device in the medical field of heart disease, and more particularly to a cardiogram capable of recording electrocardiographic information even in the case of a heart attack having a very low frequency of occurrence. Related to electrometer.

[0002]

2. Description of the Related Art Conventionally, a Holter electrocardiograph, which is worn on a subject to record electrocardiogram data, is a method of recording an electrocardiographic signal as an analog signal or converting it into a digital signal. It is a magnetic tape.

A conventional Holter monitor using a magnetic tape has a relatively large device, is heavy, and has poor portability. This caused discomfort to the user. If the recording is limited to 24 hours (or 48 hours) and no seizure occurs during that time, the recorded data is wasted. I had to go to the hospital again for the next test.

[0004]

However, for patients who have a low frequency of heart attacks, there is a case where it is difficult for the doctor to know the condition, and the treatment tends to be delayed. One of the objects of the present invention is to make it possible for a patient having a less frequent but severely painful subjective symptom, once every one to two months, to reliably record electrocardiographic data on such a small opportunity. An electrocardiograph is provided. Another object of the present invention is to provide an effective electrocardiograph that can reduce the size and weight of the device (electrocardiograph), does not hinder the user's daily life, and can be worn for a long time without causing discomfort. Provide a portable electrocardiograph that can collect data.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a detecting means for adsorbing an electrocardiographic signal generated in accordance with the operation of the heart by adsorbing the electrocardiographic signal on a body; A portable electrocardiograph having means for digitizing, a non-volatile memory for recording digitized electrocardiographic signals, and a small battery for supplying power, for starting or stopping recording of the electrocardiographic signals. A portable electrocardiograph provided with the power ON / OFF switch described above.

In other words, a flash memory of about 2 megabytes is used as a recording medium, and a button battery of about 100 to 200 milliamp hours is used as a recording medium. The electrocardiograph can be worn anytime and anywhere during the operation, and a switch for starting and stopping the recording operation, which is a feature of the present invention, enables collection and recording of electrocardiographic information at the will of the user. That is.

[0007] Thus, even if the user wears for a long time until a seizure occurs, the user cannot stochastically catch the current 24-hour Holter electrocardiograph by pressing the recording start button when the seizure occurs. Recording of electrocardiogram information.

Further, the portable electrocardiograph is constituted by one unit, provided with an adsorbing member for adsorbing the unit to the body, and the adsorbing member also serving as a detecting means for detecting the electrocardiographic signal. Is further miniaturized, and it is convenient to carry and detect.

[0009]

FIG. 1 is an external view of a portable electrocardiograph according to the present invention. FIG. 2 shows a block diagram of one embodiment.
The number of electrocardiographic sensors is not particularly limited. In addition, since the apparatus main body can be made compact, the bottom surface of the main body is used as one of the electrocardiographic sensors. As a result, the number of sensors pulled out from the main body can be reduced by one.

Referring to FIG. In the figure, reference numeral 1 denotes an electrocardiograph main body of the present invention, which also serves as one of electrocardiographic sensors. 2 is a battery storage unit. Reference numeral 3 denotes a socket, which serves as an interface connector for connecting to an external analyzer. Reference numeral 4 denotes a switch for starting and stopping recording, which also has control of a power supply and a clock. This is body 1
And can be turned on / off from above a shirt or the like even when the main body 1 is worn on the body.
5a is a bottom surface of the main body and an electrocardiographic sensor. 5b
Reference numerals 5e to 5e denote other electrocardiographic sensors, which are drawn into the winding storage section 6 when the electrocardiograph is not mounted. At the time of wearing, the main body 1 and the electrocardiographic sensors 5a to 5e stick to each other due to their own adhesiveness, but are firmly fastened with a bandage or the like for reinforcement.

FIG. 2 shows a circuit diagram of the present invention. When the dead sensor is 5e, the electrocardiographic signals from the respective electrocardiographic sensors 5a to 5d are amplified by the differential amplifier circuits 7a to 7d, respectively, pass through the sample and hold circuits 8a to 8d, and are output from the respective electrocardiographic sensors by the multiplexer 9. Are fetched into one by time division, A / D converted, and recorded in the built-in memory 11.
The recorded electrocardiographic information data is sent to an external analyzer / inspection device (not shown) through the socket 3 as a connector. The switch 4 is a switch for starting and stopping recording, and the control circuit 12 controls the recording operation. At the same time, power consumption is controlled. The control circuit 12 performs clock / timing control, memory control, and the like in addition to the above-described recording control and power supply control. In addition, it is possible to have a clock function omitted here and record / non-record time data in the memory 11. Here, the switch 4 for controlling the recording start / stop can be arbitrarily operated by the wearer.

Next, an example of use when the electrocardiograph of the present invention is used will be described. The user (subject = patient) wears the electrocardiograph by himself. The main body and the electrocardiographic sensor are stuck to predetermined positions with an adhesive bandage or the like so as not to easily come off. ECG sensor 5a
5d is pulled out from the winding part storage part 6 by a necessary length so that the sensor cord does not sag. First, the switch 4 is turned off. That is, when there is no subjective symptom of a seizure, the electrocardiographic information is not recorded, and the whole circuit is put into a sleep mode to suppress battery consumption. Thereafter, when an attack such as upset, compression, arrhythmia, and severe pain occurs, the subject turns on the switch 4 to release the sleep mode of the circuit and starts recording the electrocardiographic information data in the memory 11. It is possible to immediately go to a medical institution and take out data from the socket 3 which is a connector for the external interface of the apparatus 1 for analysis and diagnosis. If you feel inconvenience in your daily life after wearing for a long time, for example, when taking a bath, you can easily remove it yourself. At the time of storage, the cords of the sensors 5b to 5e are wound up into the winding storage unit 6.

Next, an approximate calculation of the recordable time when the memory capacity is assumed to be 2 megabytes will be described. Assuming that the number of electrocardiographic sensors excluding the dead sensor is 4, the resolution is 8 bits, and the sampling frequency per sensor is 100 Hz, the data for one second is 4 × 8 × 100 = 3200 (bits). Therefore, in 2 Mbytes, it takes 5000 seconds, that is, slightly over 1 hour and 20 minutes.
Since the seizure is as long as a few minutes to about 30 minutes, the electrocardiographic information at the time of the seizure and thereafter is sufficiently recorded. When transmitting data to an external computer or an analysis / inspection device, the clock can be set to several MHz and high-speed transfer can be performed.

[0014]

As described above, according to the configuration and method of the present invention, it is possible to reduce the size and weight of the holter electrocardiograph much more than before, and it is not inconvenient to wear it for a long time. This makes it possible to miss an opportunity to record a seizure with only the 24-hour recording so far, and to provide a very effective examination / diagnosis device for patients who have not been effectively treated.

The patient can wear this electrocardiograph on the body forever until an attack or the like occurs, and it is possible to reliably record an electrocardiographic waveform when an attack occurs.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an outer shape of the present invention.

FIG. 2 is a circuit diagram of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 The electrocardiograph main body concerning this invention 2 Battery storage part 3 Socket 4 Switch 5a-5e Electrocardiographic sensor 6 Sensor code winding storage part 7a-7d Differential amplifier 8a-8d Sample hold circuit 9 Multiplexer 10 A / D converter 11 semiconductor memory 12 controller 13 battery

Claims (3)

[Claims] 1. A detecting means for adsorbing and detecting an electrocardiographic signal generated by the operation of the heart to a body, a means for digitizing the detected electrocardiographic signal, and recording the digitized electrocardiographic signal. In a portable electrocardiograph having a non-volatile memory and a small battery for supplying power, a power ON for starting or stopping recording of the electrocardiographic signal is provided.
A portable electrocardiograph comprising a / OFF switch. 2. The portable electrocardiograph according to claim 1, wherein the portable electrocardiograph comprises a single unit, and includes a suction member for adsorbing the unit to a body, and the suction member also serves as a detecting means for detecting the electrocardiographic signal. The portable electrocardiograph according to claim 1, wherein 3. The apparatus according to claim 2, wherein said detecting means comprises an electrocardiographic signal detecting electrode which is capable of adhering to a plurality of parts of the body by extending the cord, and a device for winding up the cord of said electrocardiographic signal detecting electrode. The portable electrocardiograph according to claim 1, wherein