Biomedical subjects

V M Zaĭko

Publications and source records attributed to V M Zaĭko.

2 recordsLinked to original sources

PubMed1983

Numerical modeling of blood flow in the ventricular cavity of the artificial heart.

The flow of blood as a viscous, Newtonian, incompressible liquid in an expanding spherical cavity with a ball-type inlet valve was examined. This type of flow can serve as a model of the phase of ventricular diastole in a sac-type artificial heart. The critical values of Reynolds numbers at which flow interruption behind the valve occurs were found. The optimum geometric ratios of the dimensions of the ventricular cavity and valve that permit a decrease in the input resistance of the cavity, the size of the valve, and the surface tensions in the bloodstream were determined.

Biomechanical Phenomena↗

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↗