Flow Induced Turbulent Stress Accumulation Study of the Differently Designed Bi-leaflet Mitral valves using Dynamic PIV system

摘要

Long duration of high fluid stresses on the blood component are considered influential to the cause of hemolysis, thromboembolic complications, and platelet activation. This experimental study was conducted to analyze the accumulated turbulent stresses generated by the differently designed prosthetic heart valves using Dynamic PIV system. Four bi-leaflet valves, the St. Jude Medical (SJM) and the On-X (OX) valves with straight leaflets and the Jyros (JR) and the MIRA (MIRA) valves with curved leaflets were used in the mitral position under pulsatile-flow condition. Dynamic PIV system was employed to trace the particular particle simulating blood element and to analyze the accumulated turbulent stresses on the particular particle by analyzing the time-resolved flow fields affected by the leaflet shapes, valve designs.