HYDROACOUSTICS OF THE MECHANICAL BILEAFLET HEART VALVE

The results of experimental researches hydrodynamic noise generated by a jet flow through the mechanical bileaflet mitral valve prosthesis Italian company Sorin are given. Physical simulation was carried out in laboratory conditions on model left atrial chamber and ventricular heart. artificial increased with increasing water flow. It found that greatest intensity its spectral components observed near central valve. obtained average pressure values wake open side (10 – 20) % higher than jet. determined power densities fluctuations jet, especially frequency range 100) Hz. established small-scale vortex structures, which broke away from leaflets (20 70) Hz, degenerated starting distance 2.5 diameters downstream. Increased levels were more (12 13) dB relative to inside (5 7) 15) With an increase valve, (60 80) Hz observed. At below noises jets became approximately equal entire under consideration. research showed hydroacoustic diagnostics operation heart can be effective means diagnosing thrombus formation leaflets.