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Dynamic PIV study of the turbulent flow field of several bi-leaflet mechanical mitral prostheses

Akutsu T., Fukuda T., Imai R., Saito J., Mori K.

Biocybernetics and Biomedical Engineering

2007

Vol. 27, no. 1-2

265-269

Four mechanical bi-leaflet prostheses, the St. Jude Medical (SJM) valve and On-X (OX) valve with straight leaflets and the Jyros (JR) valve, and Edwards MIRA (MIRA) valve with curved leaflets were tested in the mitral position under pulsatile-flow conditions. Dynamic PIV system was employed to analyse the flow field affected by the leaflet shapes and overall valve designs. Detailed analysis of the time resolved information of the flow fields associated with the changing flow phases revealed the significance of the leaflet shape and overall valve designs on the flow field.

Time resolved PIV and LDA study of the turbulent flow field of bi-Ieaflet mechanical mitral prostheses

Akutsu T., Fukuda T., Sakurai S., Saito J.

Biocybernetics and Biomedical Engineering

2006

Vol. 26, no. 1

53-59

Time Resolved PIV and LDA measurment were conducted for the study of the fIow field generated by the mechanical bi-leafIet mitral valves, the SJM and the Jyros valves, to find out the effect of the valve designs and the installed orientations on the fIow. Results from the time resolved PIV system were very comparable to the LDA results. In both orientations, the JR valve generated much higher turbulent stresses.