SU1597200A1 - Muscular blood pump electrostimulator - Google Patents

Abstract

The invention relates to medical technology, namely to cardiac electrostimulators. The purpose of the invention is to improve the work of the heart muscle by accelerating the adaptation of automyscle contractions to the functional needs of the heart. The goal is achieved by introducing into the device containing successively connected bioamplifier 1, shaper 2 of the refractory interval, programmable divider of 3 cardiocycles, generator 4 of stimulating pulses and output stage 5, shaper of control signals 6 and serially connected counter 7, register 8 and decoder 9. 1 il.

Description

The invention relates to medical technology, namely to cardiac electroscopes.

The purpose of the invention is the adaptation of automys contractions to the functional needs of the heart.

The drawing shows the functional diagram of the electrostimulator of the muscular blood pump.

The electrostimulator contains a bio-amplifier 1, a forg-brover 2 refractory interval, a programmable divider of 3 cardiocycles, a generator of 4 stimulating pulses, an output stage 5, a driver of control signals 6j counter 7, a register 8 and a decoder 9.

The bioamplifier 1 is designed to isolate the signals of natural cardiac activity and selectively amplifies the myocardial cardio signal to the extent necessary for the stable operation of the refractor interval former 2 that follows it.

To distinguish natural cardiac activity from stimulating pulses and the resulting heartbeat caused by them, as well as additional protection of the device against false positives on the T-wave, the refractor interval former 2 is inserted in it, which blocks the electrostimulator operation for some time after the stimulation of the automyscle and after each selected myocardial signal, it forms at its outputs signals that are synchronous with the natural bio-amplifier 1 selected by the bioamplifier chnymi abbreviations.

The programmable cardiocyclic divider 3 is a counter divider with a programmable dividing factor and is designed to form the required recalculation rate for the formation of packets of stimulating pulses relative to the selected myocardial signal.

The generator 4 stimulating pulses contains the reference generator often and a multivibrator, which starts to work on a signal from the output of the programmable divider of 3 cardiocycles after recalculation by the last programmed number of allocated cardiosignals. pack duration

stimulating pulses in one stimulation cycle, is determined by the required number of pulses in this stimulation sequence and is given by the digital code at the data input of the 4 stimulating pulses generator. The output stage 5 according to the signals from the output of the generator 4 stimulating pulses produces the formation of stimulating pulses of negative polarity in amplitude and duration,

The driver of the control signals on the signal from the second output of the driver 2 of the refractory interval produces the first and second outputs of the time-expanded control signals received at the data recording input of the register 8 and the installation input of the counter 7, respectively.

The counter 7 performs continuous measurement of the time interval between the natural heartbeats allocated by the stimulator by filling the measured time interval with pulses with an exemplary follow-up period coming from the second output of the generator 4 of the stimulating pulses. The number of pulses, proportional to the measured time interval, is counted by the counter 7 and, at its output, is formed by the corresponding. the result of the calculation. Register 8 is designed to store information from the output of counter 7.

The decoder 9 is designed to convert the input code from the output of register 8 into a control code, input to the data of the generator 4 stimulus, lean pulses and corresponding to the number of stimulating pulses in one stimulation cycle, according to a given law.

The electrostimulator operates as follows.

The biopotentials of the heart, corresponding to the natural contractions of the heart, are allocated by bioamplifier 1 and are formed in amplitude to the shaper 2 of the refractory interval and then to the input of the programmable divider 3 cardiocycles, which recalculate them in accordance with the previously established (programmed) division factor and the output signal arriving at the first input of the generator 4 stimulating pulses, corresponding to

Claims (1)

5 of the register 8, into the control code, which is fed to the data input of the stimulating pulses generator 4, the value of which determines the duration of the burst of stimulating pulses, i.e. the number of stimulating pulses in one cycle of stimulation. The algorithm by which this code conversion occurs, i.e. the dependence of the duration of a packet of stimulating pulses on the time interval between natural heartbeats, is determined by the physiology of the heart, and is chosen to ensure effective cardiac output at different frequencies of natural heartbeats. Invention Formula An electrostimulator of a muscular blood pump containing serially connected bio-feeder, whose input is the input of a refractor interval former, a programmable cardiocyclic divider, a stimulating pulse generator, and an output Q stage, the output of which is a device output, characterized in that, in order to adapt the contractions automus to the functional needs of the heart, in him 5, a driver of control signals and serially connected counter, a register and a decoder are introduced, the output of which is connected to the second input of the stimulating pulses generator, the second output of which is connected to the counter input of the counter, the input of the control driver of the 1st signals is connected to the second output of the refractor interval driver, his first 5 the output is connected to the input of the register data record, and the second output is connected to the preset input of the counter. 0