RU2266041C2 - Electrocardiograph monitoring portable unit - Google Patents

Abstract

FIELD: medicine; radio electronics.

SUBSTANCE: device can be used for monitoring of heart activity as well as for self-diagnosing of exacerbation of disease. Electrocardiograph monitoring portable unit has multi-channel unit for reading electrocardiograph, multiplexer, keyboard with register, microprocessor with common bus, analog-to-digital converter, indication and signaling unit provide with register, and removable memory card with register. Device provides current monitoring of heart activity and helps to detect exacerbation of disease as well as slowed testing of development of exacerbation in hospitals due to inspecting data stored at removable memory card.

EFFECT: simplified design; improved reliability.

1 dwg

Description

The invention relates to medical electronics and can be used to monitor human cardiac activity and self-diagnosis of exacerbation of heart disease.

Known real-time cardiomonitor [1], consisting of an ECG removal unit containing three electrodes, an amplifier and a filter, a mobile computer, a multi-channel monitor, a keyboard and an alarm, and the computer has software through which, based on continuous selection and analysis of the ST-segment of the ECG recommendations for the patient and signals for the medical staff are being developed. The disadvantage of this device is the structural complexity and the inability to use as a simple wearable means of monitoring human cardiac activity and self-diagnosis of exacerbation of heart disease.

A known ECG system and a method of using statistical analysis of cardiac activity with topographic mapping of potential on the body surface [2], consisting of an ECG removal unit containing an array of electrodes (up to 64 or more) and the corresponding number of amplification channels, ADCs and a personal computer with a special processor, digital drive, display and printer, and the computer has software, through which on the basis of continuous selection and analysis of ECG segments at the moments P, Q, R, S, T, U produce different types of time, frequency, and statistical analysis, and the results are displayed on the display screen, including in the form of topographic mapping of the potential on the surface of the body. The disadvantage of this device is the structural complexity and the inability to use as a simple wearable means of monitoring human cardiac activity and self-diagnosis of exacerbation of heart disease.

The closest in technical essence is a non-invasive method for diagnosing acute ischemic disease and a multi-channel electrocardiograph [3], which contains an ECG removal unit, including an electrode array (up to 100 electrodes) and the corresponding number of amplifier channels, a multiplexer, a programmable amplifier, ADC, microcontroller, and a removable memory card , analyzers and displays of heart rate and ST-segment, the operation of which is provided by the corresponding software package of the microcontroller, and the values of the ST-segment counts and on all channels are continuously displayed on the display screen in a three-dimensional image. The disadvantage of this device is the structural complexity and the inability to use as a simple wearable means of monitoring human cardiac activity and self-diagnosis of exacerbation of heart disease.

The technical result of the proposed constructive solution consists in simplifying the device, increasing reliability, making it possible to use it as a wearable tool for both current monitoring of human cardiac activity and self-diagnosis of exacerbation of heart disease, and a delayed study of the development of exacerbation in stationary conditions by analyzing data accumulated on a removable card memory.

The technical result is ensured by the fact that in the ECG monitoring device comprising a microprocessor unit with a common bus, a multi-channel ECG removal unit and a multiplexer in series, the control input of which is connected to a common bus, an ADC whose output is connected to a common bus, and a removable memory card are inserted a keyboard and an indication and alarm unit connected through a first and second register respectively entered to a common bus, to which a removable memory card is also connected via a third entered register, an ADC input It is connected to the multiplexer output, and the display and signaling unit is capable of simultaneously displaying both current and previous averaged ECG parameter values delayed for a given time, and the microprocessor unit software is capable of calculating and storing such values and with the possibility of their selective recording to a removable memory card in accordance with the program specified from the keyboard.

The wearable ECG monitoring device contains a multi-channel ECG removal unit 1, a multiplexer 2, a keyboard 3 with register 4, a microprocessor unit 5 with a common bus 6, ADC 7, an indication and alarm unit 9 with register 8, and a removable memory card 11 with register 10.

Wearable device ECG monitoring works as follows. ECG signals from the output of the multi-channel ECG removal unit 1 located on the human body are sent to multiplexer 2 and, after being digitized in the ADC 7, to the common bus 6. In the process of block 5 performing the system microprocessor, standard and control programs and settings set via the keyboard 3, in each beat of cardiac activity, a significant ECG region (for example, the ST segment) is allocated for each channel, its characteristic value is calculated (for example, the maximum level value), the search for all channels determines the most dangerous characteristic value (which increases reliability, for example, when the electrodes are accidentally shifted or their contact with the human body is disturbed) and is indicated as the current value by the corresponding indicator of the indication and alarm unit 9. For one or more time periods (for example, for the last minute, last hour, etc.), the average of the most dangerous characteristic values is calculated and displayed on the corresponding indicators of the indication and alarm unit 9. When the most dangerous characteristic values go beyond the set limits, an alarm signal is generated, which arrives at the corresponding indicator-signaling unit of the indication and alarm unit 9. The current and delayed characteristic values in accordance with the program settings are recorded on a removable memory card 11 selectively, which increases the recording time.

Wearable ECG monitoring device can be made of standard modules and on an accessible element base. The constructive implementation of a number of blocks may coincide or include designs of the same functional purpose of the prototype and analogues. For example, the designs of blocks 1, 2, 5-7, 11 can basically coincide with the designs of blocks 10, 33, 34, 30, 31, 21, 14 of the prototype. The execution of the remaining blocks is determined by their functional purpose in the device and is known or obvious from the prior art in the applicable time and frequency ranges. As the software used is typical, in particular, coinciding with that specified in the prototype [4, 5].

Sources of information

1. Patent No. 4679144 (US). Real-time cardiomonitor / M.W. Soh. 1987.

2. Patent No. 4974598 (US). ECG system and method of using statistical analysis of cardiac activity with topographic mapping of potential on the surface of the body / E.R. John. 1990.

3. Patent No. 5419337 (US). Non-invasive multichannel electrocardiograph and method for the diagnosis of acute ischemic disease / E.R. Dempsey. 1995.

4. Combined Manual For VidC & DigC. - Chirp Technical Services, pp. 1-1 to 1-3.

5. Borland C ++ dos Reference, Version 4.0, p. 54.

Claims (1)

An ECG monitoring device containing a microprocessor unit with a common bus, a multichannel ECG removal unit and a multiplexer in series, the control input of which is connected to a common bus, an ADC whose output is connected to a common bus, and a removable memory card, characterized in that a keyboard is inserted into it and an indication and alarm unit connected through a first and second register respectively entered to a common bus, to which a removable memory card is also connected via a third entered register, and the ADC input is connected to the output a multiplexer, the display and signaling unit being capable of simultaneously displaying both current and previous averaged ECG parameter values delayed for a given time, and the microprocessor unit software is capable of calculating and storing such values and can selectively record them to a removable card memory in accordance with the program specified from the keyboard.