RU4672U1 - RHYTHM ANALYZER R - R - Google Patents

Abstract

1. Rhythm analyzer R - R, having electrocardiosignal sensors connected to an amplifier-recorder, as well as an input signal filter, a normalizing element, a differentiator, a comparator, a shaper, an electrocardiosignal processing unit with a computer and a printing device, connected in series with the output of the amplifier-recorder, differing by the fact that in it the electrocardiosignal processing unit is presented in the form of a series-connected trigger of input pulses and a counting trigger, and a timer is connected to the trigger of input pulses. Rhythm analyzer R - R according to claim 1, characterized in that the differentiator is made in the form of two serially connected differentiating RC - chains, after each of which an amplifier is turned on.

Description

The utility model relates to the field of cardiology, human physiology and sports medicine. It can be used to assess the condition of the patient’s cardiovascular system, both at rest, and under the influence of various samples, medications and external conditions.

Various devices are known for isolating R-waves in electrocardiosignals (ECS), followed by processing of R-R intervals for the purpose of analyzing and monitoring the rhythmic activity of the heart. Depending on the problem being solved by the device, the structure of the device and its complexity change.

So the rhythm cardiometer RKM-01 is known / Theory and practice of automation of electrocardiographic studies.-Pushchino, 197b.s.b1 / 3 rhythmocardioscopes RKS-OK02) / Dembo A.G., Zemtsovsky E.V.

Sports cardiology: a guide for doctors.-Leningrad. Medicine. 1989.-464s /, Rhythm cardiointervalograph, as well as specialized automated devices ARS-A1 (-BK, -RN) / Bayevsky P.M .. Kirillov OI, Kletskin SZ Mathematical analysis of cardiac changes

 and. l rhythm under stress. M.: Science. 1984. 222 p. / And others. The main disadvantage of devices produced in series is the limited number of characteristics obtained using these devices, and the inability to easily reconfigure them to other characteristics. Specialized automated devices, as a rule, are quite complex and require highly qualified staff with special training. Known, for example, cardiointervalometric analyzer type KIM-A / Medical equipment. 1993. N4, p. 44-45 /. It has a sensor system for receiving cardioinformation, a processing unit for this information, consisting of an adder, amplifier, analog-to-digital converter and microprocessor. For storage and visualization of the analysis results, the device provides a printer, monitor and archive. For KIM-A, the same disadvantages are characteristic as for other devices manufactured by the domestic industry. Also known is a device for analysis and control of the rhythmic activity of the heart / Khudyakov A.V., Yashkov V.T. Radio electronics, physics and mathematics in biology and medicine. 1984, p. 40 /. It consists of an amplifier, a forming device, two converters, a heart rate monitor, an amplitude selector, as well as a synchronization unit, a circuit for fixing average values of the heartbeat period, an amplitude discriminator of deviations from the average value, and a recording device. However, the device has a complex circuit, is made on an outdated elemental base, therefore it is heavy and inconvenient in operation. The closest analogue of the claimed solution is an analyzer in which a device for isolating the R-wave of an electrocardiogram / Savinov is used as the main element

Yu.G., Araten S.M., Kardash G.S., Matyushin I.F. and Bulanov G.A. Copyright certificate N1311706, MKI A 61 B5 / 04 /. It includes low-pass filters, normalizing elements, differentiators, comparators, one-shot, coincidence element, trigger and key. The device has two similar chains of elements to which the ECS and the sphygmogram arrive. At the moment of incubation of the sphygmogram, which comes later than the T-wave of the EX, the key is opened and the pulse generated in the coincidence element synchronously with the R-wave of the EX is passed to the output for subsequent registration and processing.

A disadvantage of the device for isolating the R-wave of EX-is its complexity, due to the presence of electrocardiographic and sphygmographic channels and the corresponding signal sensors.

The aim of the proposed solution is to simplify the node allocation of the R-wave EX-while maintaining the accuracy of the removal of R-R intervals in heart rate analyzers.

The essence of the proposed solution is the original representation of the processing unit of the electrocardiosignal in the form of series-connected trigger input pulses and counting trigger, with a timer connected to the latter. In addition, the differentiator is made in the form of two series-connected differentiating RC chains.

The block diagram of the proposed utility model is shown in Fig. 1, and the time dependence of the voltage at individual points of the circuit illustrating the operation of that part of the circuit that determines the procedure for isolating the R-wave of the claimed solution is shown in Fig. 2.

The model consists of the following structural elements: a system of electrocardiogram signals 1, an amplifier-recorder 2, a filter-amplitudes of the legs about the selector 3, a normalizing amplifier 4, a differentiator 5, a comparator b, a driver 7 with optocoupler isolation, a trigger for input pulses 8, a counting trigger 9, a timer 10, a computing device 11, a printing device 12, and a system for recording an electrocardiogram on a paper tape 13. In a actually made device, the corresponding small-sized electronic components are used as elements 1,2 and 13 trocardiograph, for example, type EK1T-03, elements 3 to 7 are assembled on a special board, also placed in the cardiograph. Power supply of these elements is carried out from the power supply unit of the cardiograph. When using a DZ-28 type microcomputer as a computing device, it is convenient to place elements 8 and 9 in a standard pairing unit, type BS-02, used to interface a DZ-28 computer with some peripheral devices.

The model work on the allocation of R-teeth and the measurement of R-R-intervals is as follows. The electrocardiogram in the form shown in Fig. 2a is supplied from an amplifier-recorder 2 to an amplitude selector 3, which simultaneously performs the function of a low-pass filter. The waveform transmitted through the normalizing amplifier 4 is shown in FIG. After passing through the differentiator 5 (Fig.2c), the comparator b and the driver 7, the signal in the form shown in Fig.2d, triggers the input pulse trigger 8, the output signal of which (Fig.2d) turns on and off the counting trigger 9, the output signal of which shown in fig.2e. A computer using timer 10 measures the duration of the pulses on the counting trigger with an accuracy of no worse than 0.001 seconds. The measured time interval corresponds to the time between two heartbeats. In accordance with the selected algorithm of operation, the computer counts the required number of R-R intervals (for example, 100), processes the resulting array in order to find statistical indicators of the heart rhythm:

1) mathematical expectation s,

2) fashion M,

3) variational range X,

4) standard deviation

5) AM mode amplitudes,

6) voltage index IN.

The results of statistical processing (and, if necessary, the entire array of R-R intervals) are output to a printing device. After printing is complete, the model is ready to restart.

Depending on the amount of information printed, the readiness of the model for restarting occurs in 2-5 minutes. Computer performance does not play a fundamental role, so. as. the calculation time of the array of R-R intervals is significantly shorter than the preparation and measurement time, in turn, the measurement time is determined by the specifics of the experiment (the number of recorded intervals and the time of ECG control recording on the cardiograph tape).

Applicant, patent holder: NIIMF SSU

Director of NIIMF SSU

Authors tA f Lykova E.Yu.

. y. ;;:} C. AmirSE

fgfer

$ - / &. Kirichuk V.F.

I /, Kuznetsov V.E.

k, uA,

 Lykov Yu.I.

Claims (2)

1. The rhythm analyzer R - R, having electrocardiogram sensors connected to an amplifier-recorder, and also connected in series with the output of a registrar-amplifier, an input signal filter, a normalizing element, a differentiator, a comparator, a shaper, an electrocardiogram signal processing unit with a computer and a printing device, characterized the fact that in it the electrocardiosignal processing unit is presented in the form of a serially connected trigger of input pulses and a counting trigger, and tay is connected to the trigger of input pulses measures.  2. The R - R rhythm analyzer according to claim 1, characterized in that the differentiator is made in the form of two series-connected differentiating RC chains, after each of which an amplifier is turned on.