[Development of technical aids in ultrasonic diapeutics and experience in their use in public health of Udmurt]. / Razrabotka tekhnicheskikh sredstv ul'trazvukovoi diapevtiki i opyt ikh primeneniia v zdravookhranenii Udmurtii.

Analysing the physicians' comments on ultrasonic diagnostic devices revealed it necessary to adapt the routine transducers of these devices for diapeutical interventions. High-echogenicity needles that direct devices for their performance (holders) and special adapters have been designed.

Automatic control systems for the artificial heart and ventricular assist device.

Automatic control systems for the artificial heart (AH) and ventricular assist device were developed using selected criteria of effectiveness, a mathematical model of regulation, and noninvasive measures of the hemodynamic parameters. The Sinus IS2 system was developed for control of the AH; its main component is a high-speed servomechanism that provides for the generation of pneumatic pulses. The servomechanism is controlled by automatic regulation with pressure feedback. Mean aortic pressure was used as the primary regulated hemodynamic parameter. The systems were tested using both a physical model and a physiologic experiment. Contractile insufficiency of the left ventricle was simulated in testing the control system for circulatory assistance. The studies demonstrate that automatic control systems function effectively by providing normal blood circulation in both the resting state and in certain transient processes occurring in a real, dynamic circulatory system.

[Study of the efficacy of assisted circulation control by mathematical and physical modeling methods]. / Issledovanie éffektivnosti reguliatsii vspomogatel'nogo krovoobrashcheniia metodami matematicheskogo i fizicheskogo modelirovaniia.

The efficiency of the assisted circulation control has been studied by mathematical and physical simulation. It has been assessed by simulating a transient process within the circulation system that imitated the left ventricular failure. The control system for regulation of the assisted circulation process based on the mathematical models is shown to be capable of maintaining the main hemodynamic parameters and the left ventricular relief at the present level in heart failure.

[The sinus VK experimental apparatus for assisted circulation]. / Eksperimental'nyi apparat vspomogatel'nogo krovoobrashcheniia "Sinus VK".

Presented in the paper is the unit for cardiosynchronized extra- and intracorporal control in the course of the intensive therapy of patients with acute cardiac failure. It provides several methods of the assisted circulation and can be used in clinical cardiology, surgery and reanimation departments. Main specifications, the structure and the principle of functioning are given. The prototype testing has shown that "CHHyc B K" can be used to advantage in clinical practice and should be introduced for the full - scale production.