[Feasibility of increasing the high-speed response of the electromechanical drive in assisted circulation devices]

The conditions in assisted circulation, especially with ballooned aorta, place high demands on the speed of the intraortal pump-balloon response. The salient feature of the described assisted circulation unit consists in that the intraortal pump-balloon is connected to the pneumotract via a commutative air-operated valve. A block diagram of the assisted circulation unit "Biopulso-4" based on the use of the electric drive, designed at the All-Union Scientific-Research Institute of Medical Equipment and Instruments, stress diagrams and a scheme explaining the operation of the apparatus, are described. The results obtained show the possibility of the balloon's resetting and opening in 70 ms, with the triggering synchronous pulse delay of 10 ms prior to response (with air use as power gas). These results are not any worse than those obtained with the pneumatic drive-based assisted circulation apparatus.