SU650627A1 - Artherial blood return system - Google Patents

Description

one

The invention relates to medical technology, in particular to BcnoNforaTenbHoro blood circulation apparatus, which partially performs the pumping function of the natural heart.

The arterial blood return system is known, which contains a blood pump divided by an elastic partition into two chambers, one of which communicates with the receiving and output cannulas, and the second with a source of pressure and vacuum h "cutting the electropneumatic valve connected to the pulse generator through an adjustment unit systole duration and delay relay ij.

The system is controlled by its operation. ECG signals arriving at the biosynchronizer and then to the pulse generator with a predetermined time delay.

The disadvantage of the system is the lack of a buffer volume of blood, which increases the risk of embolism and the formation of blood cells.

The aim of the invention is to reduce the injury of blood cells while reducing the flow of venous blood.

This goal is achieved by the fact that between the receiving cannula and the pump there is a sealed tank fitted with a level indicator, the signal contacts of which are connected to the input of the system for adjusting the duration

10 ly.

A schematic diagram of the device shown in the drawing.

The system contains a pump 1, divided by a partition 2 into dvr chambers 3 and 4. Chamber 4 is equipped with an inlet 5 n outlet 6 valves and is connected by pipeline 7 with the receiving 8 and the outlet

9 cannulae. Between the cannula 8 and the pump 1 is installed hermetic tank

10 with a filter 11.

Claims (1)

The tank 10 is equipped with a level indicator with a sensitive element 12. The air cavity 13 of the tank. n ffirT communicated with BoioryM .rf.V. pump 1 on the drawing is not shown; with vacuum gauge 15, Chamber 3 via electric pneumatic valve 16 communicates with overpressure line JL7 and vacuum line 18, valve 16 is controlled from system 19, which contains biosynchronizer 2O, pulse generator 21, switch 22 and adjustment unit; turnaround systole 23 with turnips hold 24. During the operation of the system b of cavity 13, a vacuum is created, under the action of which blood enters the reservoir, flows through filter 11 and fills the pump chamber. During synchronous work with the patient's heart, the signal from the Paschen comes to biosynchronizer 20, then through switch 22 and relay 24 to block 23, which supplies voltage pulses to valve 16. With asynchronous pumping, instead of biosynchronizer, the pulse generator is put into operation. With a decrease in blood flow, the level in the reservoir decreases, the output contacts of the alarm device open the circuit of the unit, due to which the pump will be stopped and the blood withdrawal from the reservoir will be stopped. .. 7 This reduces the voltage in the blood stream, causing injury to its formed elements. Claims of the invention An arterial blood return system comprising a blood pump divided by an elastic partition into two sealed chambers, one of which communicates with the receiving and output cannulas, and the second with pressure and vacuum sources through an electropneumatic valve connected through a systole duration adjustment unit and a relay delays to the pulse generator, characterized in that, in order to reduce the injury of blood cells, by delaying the onset of systole while reducing the flow of venous blood, between the cannula and the pump is mounted hermetically sealed tank provided with a level sensor, which signal contacts are connected to. input block adjustment systole duration. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 303078,, cl. A 61 M 1/02, 1971.