RU1789226C - Electrocardiologic stimulant - Google Patents

Abstract

The invention relates to medical instrumentation and can be used in medical medical and diagnostic practice. The purpose of the invention is to increase reliability. The pacemaker comprises a power supply, a clock, a voltage converter, a storage capacitor, an electronic key, a threshold device, a voltage divider with a variable division ratio, a comparator and a heart rate sensor. 1 ill.

Description

The invention relates to the field of medical instrument making and can be used in medical medical and diagnostic practice.

A known pacemaker containing a power source, a stimulating pulse generator, the output of which is connected to the first input of the electronic key, the output of which is connected to the output of the pacemaker, the second input of the electronic key is connected to the first lining of the storage capacitor, the second lining of which is connected to the output of the voltage converter and the input of the voltage divider, the output of which through the threshold block is connected to the first input of the voltage converter, the second input of which is connected nen yield a power supply and the input stimulus pulse generator.

A disadvantage of the known device is the lack of control of the actual imposition of the required heart rate, as well as the ability to smoothly set the amplitude of the output

the stimulator voltage corresponding to the individual stimulation threshold for each patient, since exceeding this threshold causes severe pain.

The aim of the invention is to increase reliability.

This goal is achieved by the fact that, in a known pacemaker containing a power source, a stimulating pulse generator, the output of which is connected to the output of the pacemaker, the second input of the electronic key is connected to the first lining of the storage capacitor, the second lining of which is connected to the output of the voltage converter and the input a voltage divider whose output is connected through a threshold block to the first input of a voltage converter, the second input of which is connected to a source output and electrical power generator and the input stimulus pulses introduced comparator frequencies and heart rate sensor, whose output is connected to a first input of the frequency comparator vtoSO

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whose second input is connected to the output of the stimulating pulse generator, and the output of the frequency comparator is connected to the control input of the voltage divider.

The drawing shows a structural diagram of the proposed pacemaker.

The pacemaker contains a power supply 1, a clock generator 2, a voltage converter 3, a storage capacitor 4, an electronic switch 5, a threshold device 6, a controlled voltage divider 7 with a variable division ratio, a frequency comparator 8 and a heart rate sensor 9 abbreviations.

The voltage divider 7 is connected to the output of the voltage converter 3, to which the storage capacitor 4 is also connected, and the input of the threshold device 8, made, for example, as a Schmitt trigger, the output of which is connected to the control input, is connected to the output of the voltage divider 7 voltage converter 3. The voltage converter 3 can be made, for example, in the form of a serially connected master oscillator and a power amplifier, the master oscillator having an input that controls the excitation or disruption of oscillations of the generator, this input is a control input of the voltage transformer 3.

The clock generator 2 is connected to one input of the frequency comparator 8 and an electronic key 5, to which a storage capacitor 4 is also connected, and electrodes are connected to the output of the electronic key 5. A heart rate sensor 9 is connected to another input of the frequency comparator 8, and the output of the comparator 8 is connected to the control input of the voltage divider 7.

Pacemaker works as follows.

When the power supply 1 is turned on, the voltage converter 3 is turned on and the charging of the storage capacitor 4 starts. The voltage at the storage capacitor 4 and the voltage divider 7 increases. At a certain voltage value on the voltage divider 7, its output voltage becomes sufficient to trigger the threshold device 6, it operates and turns off the voltage converter 3 by its output signal.

As the storage capacitor 4 is discharged through the electronic switch 5 and the electrodes to the load, the voltage on the storage capacitor 4 and the voltage divider 7 reaches a value at which the threshold device 6 returns to its original state, its output signal is taken off the soup of the input of the converter 3 voltage and the latter is included in the operation, which leads to an increase in voltage on the storage capacitor 4. At a certain voltage value on the voltage divider 7, its output voltage becomes sufficient for actuation threshold device used and off voltage converter 3 and more such cycles are repeated. The voltage value at the storage capacitor 4 is determined by the division factor of the voltage divider 7 and the threshold of operation of the threshold device 6.

The described process takes place when the frequencies of the sequences arriving at the frequency comparator 8 from the clock generator 2 and the heart rate sensor 9 coincide, and there is no control signal at the output of the frequency comparator 8. In the process of stimulation, there may be cases where the required stimulation rhythm is not hated, for example, due to an increase in the stimulation threshold or displacement of the electrode from the position at which the amplitude of the stimulating pulses was set. In this case, the frequency of the sequence taken from the heart rate sensor 9 will be less than the frequency of the clock pulses at the output of the clock generator 2, which will cause a control signal to appear at the output of the frequency comparator 8 supplied to the control input of the voltage divider 7. By this signal, the dividing factor of the voltage divider 7 starts to change so that threshold device 6 is triggered and voltage converter 3 is turned on. The voltage at the storage capacitor 4 and, therefore, at the output of the pacemaker begins to increase. This process continues until the voltage at the storage capacitor 4 and at the output of the device is sufficient to impose a predetermined heart rate. If the heart rate and the frequency of the clock generator 2 are equal, the signal at the output of the frequency comparator 8 disappears and the voltage divider 7 remains at the same division coefficient, which corresponds to the voltage at the output of the pacemaker, necessary to induce a given heart rate in changing conditions x.

Claims (1)

SUMMARY OF THE INVENTION An pacemaker comprising an electrical power source, a stimulating pulse generator, the output of which is connected to a first input of an electronic key, the output of which is connected to an output of a pacemaker, a second input of an electronic key is connected to a first storage capacitor lining, a second lining is connected to a voltage converter output and the input of the voltage divider, the output of which through the threshold block is connected to the first input 0 a voltage converter, the second input of which is connected to the output of the power source and the input of the stimulating pulse generator, characterized in that, in order to increase reliability, a frequency comparator and a heart rate sensor are introduced into it, the output of which is connected to the first input of the frequency comparator, the second input of which connected to the output of the stimulating pulse generator, and the output of the frequency comparator connected to the control input of the voltage divider.