SU882527A1 - Auxiliary blood circulation apparatus - Google Patents

Description

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The invention relates to medical technology, in particular to assisted circulatory machines.

The auxiliary circulatory apparatus is known, which contains a cardiac synchronizer, a drive with a linear motor, a control unit, a mechanical pneumatic converter, a working body, two electromagnetic valves, a phasing device, and an elastic capacitance. In addition, the device contains an indicator of arterial pressure, made in the form of a measuring unit. Г11.

A disadvantage of the known apparatus is that, due to the lack of means for the operative processing and visualization of high-quality bioelectric and hemodynamic parameters of t he cy, it does not provide a sufficiently high therapeutic effect. In addition, the known apparatus produces a cardiosynchronization process of the secondary blood circulation with low accuracy.

The purpose of the invention is to improve the accuracy of the cardiosynchronization process of the secondary blood circulation process.

The goal is achieved by the fact that the secondary blood circulation apparatus, containing cardiosynchronization, actuator, control unit, working body and blood pressure indicator, is equipped with a logic input unit, a computing unit, a visualization unit, a measuring unit and an analog-to-digital converter; the digital converter is connected to the first input of the logic input unit, the second input of which is connected to the output of the cardiosynchronizer, and the output of the logic input eye input connected informeschii

15 to the input of the computational unit, the output of the computer is sub-native to the input of the visualization unit.

In this case, the logical block of information input is made in the form of a quartz oscillator of the reference frequency, a counter, a register, and logical elements of NAND, the first input of the counter being connected to the output of the quartz oscillator of the reference frequency, the second

25 input - with the output of the cardiosynchronizer, the third input is connected through the logical elements AND IS NOT to the output of the supermixing unit, whose input through the logical elements AND IS NOT connected to

30 output analog-digital converter and the outputs of the register, the input of which is connected to the output of the counter.

The drawing shows a structural diagram of the apparatus.

The device contains a cardiac synchronizer -1, a drive 2, a control unit 3, an operating unit 4 and an arterial pressure indicator. The blood pressure indicator is made in the form of serially connected measuring unit 5 and analog-digital converter 6.

The device is equipped with a computing unit 7, a visualization unit 8 and a logic block for entering information. The information input logic unit is designed to calculate the duration of the cardiac cycle and perform communications between the cardiac synchronizer 1 and the computing unit 7.

The cardiac synchronizer 1 and the measuring unit 5 of the pressure indicator are connected to the patient. One of the outputs of the cardiac synchronizer 1 is connected to the input of the control unit 3, the output. which is connected to the input of the actuator 2 The actuator 2 output is connected to the working body 4, which is installed in the patient's femoral artery or aorta. The actuator 2 converts electrical energy into mechanical energy and is pneumatically or hydraulically coupled to the actuator 4.

The output of the analogue-digital converter b of the blood pressure indicator is connected to one of the inputs of the logic input block, the second input of which is connected to the second output of the cardiac synchronizer 1. The logic input block of information is connected to the computing unit 7, the output of which is connected to the input of block 8 visualization.

The logical block of information input contains a crystal oscillator 9 of the reference frequency, the counter 10, the register 11 and the logic elements 12 AND-NOT.

The quartz oscillator 9 of the reference frequency generates every 2 ms the pulses arriving at the counter 10. Counter 10 is the accumulator of information about the time of the cardiac cycle. Register 11 charges information received from counter 10 and outputs it to the computing unit 7 on demand.

The logical elements 12 AND-NOT communicate between the computation and the block 7, the analog-digital converter b of the blood pressure indicator, the register 11 and the counter 10.

One of the inputs of the counter 10 is connected to the output of the crystal oscillator 9, the second input is connected to the output of the cardiac synchronizer 1, the third input is through logic elements 12 with the output of the computing unit 7. The input of the logic unit 12 is connected to the output of the analogue blood pressure indicator and the register 11 whose input is connected to the output of the counter 10.

The device works as follows.

The patient is connected via ECG electrodes to the cardiac synchronizer 1. Cardiosynchronizer 1 separates the patient's ECG R-teeth formed in frequency, duration, and amplitude, and the Filling and Emptying of the working organ 4 is generated. These signals are sent to the control unit 3.

When a pulse is applied Filling of the working organ 4 provides for an increase in the patient's blood pressure in the diastole, and when a pulse arrives in Emptying, a decrease in the arterial pressure in the systole, by means of a catvbiM discharge of the heart and an increase in coronary blood flow. These pressure changes are recorded by the blood pressure indicator measuring unit 5.

At the same time, from the second output of the cardiac synchronizer 1, the pulse formed in amplitude and frequency, which coincides in phase with the QRS complex of the ECG, is fed to the second input of the counter 10. The first input of the counter 10 receives pulses from the crystal oscillator 9 of the reference frequency.

At the moment of information retrieval from the output of the computing unit 7, a pulse enters through the logic elements 12 AND-NOT to the third input of the counter 10. Information in digital form from the counter 10 is transmitted to the register 11, from its output through the logical elements 12 the signal is fed to the input of the computing unit 7 and counter 10 is reset to O. In it, accumulation of the duration of the next cardiac cycle begins.

From the blood pressure indicator connected to the patient, the pressure values in the digital code are taken and fed to the input of the logic input block.

At the moment of information retrieval, when a pulse is received from the computational unit by the logic elements 12, there are 7 values, taken from the analog-digital blood pressure indicator converter 6, through the same logic elements 12 are fed to the input of the computing unit 7.

In the computing unit 7, after removing information from the cardiac synchronizer 1 and the blood pressure indicator, the following ECG and hemodynamic parameters are calculated, which from the output of the computing unit 7 arrive at the input of the visualization unit 8: heart rate of the arrhythmia, cardio time

Claims (2)

Claim 1. The apparatus of auxiliary circulation, containing a cardiosynchronizer, a drive, a control unit, a working body and an indicator of blood pressure, characterized in that, in order to increase the accuracy of cardiosynchronization of the process of auxiliary circulation, it is equipped with., Η logic input unit, computational a block, a visualization block, a measuring block and an analog-to-digital converter, while the output of the analog-to-digital converter is connected to the first input of the information input logical unit, the second. the course of which is connected to the output of the cardiosynchronizer, and the output of the logical information input unit is connected to the input of the computing unit, the output of which is connected to the input of the visualization unit. 2. The device pop. 1, characterized in that the information input logic unit is made in the form of a quartz reference frequency generator, counter, register, and NAND gates, the first input of the counter connected to the output of the quartz reference frequency generator, the second input to the output of the cardiosynchronizer, the third input through the logical elements AND-NOT connected to the output of the computing unit, the input of which through the logical elements AND-NOT connected to the output of the analog-to-digital converter and the outputs of the register, the input of which is connected to the output of the counter. I.