SU703107A1 - Auxiliary blood circulation apparatus - Google Patents

Description

one

The invention relates to the field of mediation technology, in particular, to devices for providing secondary blood circulation in case of acute cardiac insufficiency.

An auxiliary blood circulation apparatus is known, which contains a series-connected linear electric motor, a core position sensor, a compressor, an operating element, a control system, and a cardio-synchronizer 1

This device is closest to the invention in its technical nature and the result achieved.

The disadvantage of this device is the possibility of getting a headache. The working organ during its preparation for work, which creates a threat to the patient's safety.

The aim of the invention is to ensure patient safety by preventing air from entering the working organ.

. The goal is achieved by the fact that the proposed apparatus is equipped with a device for automatic mode selection, operation with a program control unit, a security unit connected to the output of the program control unit, a fixed flow control gas, two electromagnetic valves for alternating communication of the working element with the working gas capacity or with. atmosphere, and an electronic switch for alternately connecting to the control system of the cardiosynchronizer OR

0 control

FIG. 1 is a block diagram of an assisted circulatory apparatus; in fig. 2 is a voltage chart at points in the block diagram.

five

The apparatus contains a reciprocating engine 1, the shaft of which is rigidly connected with compressor 2 and the 3 position sensor. Compressor 2 is pneumatically connected to

0 working organ 4 and two solenoid valves 5 and 6, and the pneumatic valve 5 communicates the cavity of the compressor 2 with a capacity of 7, filled with working gas under atmospheric pressure

5 and pneumatic valve 6 - with the atmosphere. The cardiosynchronizer 8, which is part of the apparatus, via the electronic switch 9, outputs sync pulses to the input of the control system 10 by the engine 1.

In addition, the other two inputs of the control system 10 are connected to the outputs of the atchik 3 position and through the electronic switch 9 to the outputs of the software control unit 11, and the outputs of the control system 10 are connected to the windings of the engine 1 and to the security unit 12. To the second input, the safety unit 12 is connected to the output of the program unit 11. The output of the unit, l2-security, is connected to an electro-magnetic pneumatic valve 6. The remaining outputs of the software control unit 11 are connected to an electronic switch 9 and an electromagnetic pneumatic valve 5 i

The device works as follows.

In ventilation mode, electrocardiosignal Od. The patient (Fig. 2) is fed to the input of the cardiac synchronizer 8. The signal U5 from the output of the cardiosynchronizer 8 is disconnected from the control system 10 by means of the electronic switch 9. For this, a constant voltage Uf is formed at one of the outputs (6) of the block 11; Allowing to connect the output (8) of the block; 11 to the inlet (g) of the control system 10. A voltage of 1%, equals Dg, is a signal for driving the engine core 1, which moves the piston of the compressor 2 to the extreme positions, one of which corresponds to evacuation and the other to compression. In the evacuation phase, block 11 generates a signal, Uj, and in the compressor phase, a UH signal. The signal and opens the pneumatic valve 5 and reports the tank 7, filled with the working pelvis, with the cavity of the compressor 2 and the working body. 4. Signal Uu. enters unit 12 ,. which forms the output signal Ujj, acting on the electromagnetic pneumatic valve b. Which, in turn, communicates the flow rate of the compressor 2 with the atmosphere. Periodic repetition of the described process leads to automatic removal of air from the pneumatic section of the compressor - the working body and filling it with the working gas.

After the ventilation mode, the device is automatically transferred to the initial filling mode, in which a certain amount of gas passes into the pneumatic section corresponding to the selected working member, and the signal H from the output of block 11 goes to the electronic switch 9 and, by providing ca. g) HE management systems. From another output of the block 11, the signal Uj opens the pneumatic valve 5, which connects S7 to 7 with a pneumatic section of the working organ 4. Thus, the piston of the compressor 2 takes the position determined by the subsequent closing of the pneumatic valve 5.

After the initial filling with working gas, the device automatically switches to the operating mode, which is characterized by the absence of signals Ug and Ui from block 11. At the same time, the output (5) of the cardiac synchronizer 8 is connected to the input (g) of the control system 10.

After a fixed time interval, manually adjustable, the device is automatically transferred to the make-up mode, carried out similarly to the initial filling mode. After recharge, the operation mode is resumed.

The emergency shutdown mode is characterized by the fact that the generated signal and from the output of control system 1 is fed to one of the inputs of block 12 and is analyzed in it. In the event of emergency situations (e.g., load change of the drive due to rupture of the internal balloon, etc.), the amplitude of the UK signal exceeds the permissible level Uon, which is fixed by the block 12, as a result of which a constant pneumatic valve is generated at its output b, which leads to the cessation of the impact of the working body on the body.

Thus, the described auxiliary blood circulation apparatus ensures the qualitative performance of the following Stages, the auxiliary blood circulation process: the automatic filling mode of the pneumotrack working gas — a working-organ; the mode of automatic compensation of gas leaks from the mentioned pneumatic section; the mode of automatic termination of the body's influence on the body in the event of critical situations that threaten the patient's life.

Claims (1)

Invention Formula The auxiliary blood circulation device, which contains a linearly connected linear motor, a core position sensor, a compressor, an operating element, a control system and a cardiac synchronizer, so that, in order to ensure patient safety by excluding air from entering the working body, the apparatus is equipped with a device for automatic selection of operating modes with a software control unit, a safety unit connected to the input of the software control unit, a working gas tank, two alternating current a working device with a working gas capacity or with an atmosphere; and an electronic switch for alternately connecting to the control system of Cardiac Sync or software control unit. Sources of information taken into account in the examination -1. Belilovsky M.A. et al., Heart Care Facilitator, Medical Technician, 4. 1971, p. 14-18. SsHmu / r / iijuu mode Directive „f a. II n.eiH, .- r ,, a ne bucha PaSc u -d „„ PaSo.u. .   II BUT ,.- ......,,  D JA l1A A A {A „JV A l l I l .... and-