Biomedical subjects

P A Volyntsev

Publications and source records attributed to P A Volyntsev.

2 recordsLinked to original sources

PubMedDate not supplied

[Computerized hydrodynamic system "Flow" for testing artificial heart valves].

The computerized mock circulation system is described for analyzing the hydrodynamic characteristics of artificial heart valves. Flow studies have been carried out on 6 mechanical valves of various types. The volumetric flow, pressure upstream and downstream were measured and the mean systolic pressure drop and energy losses were calculated. The commercial model of the EMIKS valve shows much lower values of pressure drop and one of the smallest value of energy losses among the tested artificial heart valves.

Heart Valve Prosthesis↗

PubMedDate not supplied

[A method of determining the feedback resistance of artificial heart valves].

Methods to check the back-feed resistivity of the artificial heart valve in static mode have been worked out. These methods allow one to check the resistivity of the closed valve to the revert liquid flow or liquid leakage through it when the new prostheses are tested. The comparative tests of two biovalves and eight mechanical prostheses were carried out. It was stated that among the mechanical valves, which are most widely used in the hospitals (disk, ball and triaflet) the highest resistance when closed has the silicon ball aortic valve AKCh-4-0.6 (Sh).

Aortic Valve↗