In this paper, in vitro experimental research results of the hydrodynamic noise of open and semi-closed bileaflet prosthetic mitral valve are presented. The bileaflet valve Sorin biomedica cardio was used in this research. Group of pressure fluctuation sensors and sensors of absolute pressure registered noise of the vortex structures and the jet flow. For the open bileaflet valve, the mean pressures are higher near the side jet than near the central jet. The lowest mean pressures occur near the side jet downstream to the semi-closed valve. Spectral levels of the pressure fluctuations significantly varied for different flow rate in the frequency range from 0.03 Hz to 200 Hz. For the semi-closed valve near the side jet, the power spectral densities of the pressure fluctuations are (3. . . 4) times greater than for the open one. It was found that hydroacoustic measurements could be an effective basis for developing diagnostic equipment in order to check the use of the bileaflet prosthetic mitral valve.
Noise of open and semi-closed bileaflet prosthetic mitral valve
Redaelli A.;Lucherini F.;Fiore G. B.;
2019-01-01
Abstract
In this paper, in vitro experimental research results of the hydrodynamic noise of open and semi-closed bileaflet prosthetic mitral valve are presented. The bileaflet valve Sorin biomedica cardio was used in this research. Group of pressure fluctuation sensors and sensors of absolute pressure registered noise of the vortex structures and the jet flow. For the open bileaflet valve, the mean pressures are higher near the side jet than near the central jet. The lowest mean pressures occur near the side jet downstream to the semi-closed valve. Spectral levels of the pressure fluctuations significantly varied for different flow rate in the frequency range from 0.03 Hz to 200 Hz. For the semi-closed valve near the side jet, the power spectral densities of the pressure fluctuations are (3. . . 4) times greater than for the open one. It was found that hydroacoustic measurements could be an effective basis for developing diagnostic equipment in order to check the use of the bileaflet prosthetic mitral valve.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
