Key result
Curved HIA-BL valves reduce boundary layer separation and stabilize leaflets at peak systole versus straight designs.
Population
Computational fluid dynamics (CFD) models of two bileaflet mechanical heart valve geometries
Comparison
Curved leaflet geometry forming a Venturi passage vs Straight leaflet geometry
Design
Preclinical
Authors
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May improve mechanical valve hemodynamics; leaves open clinical translation from animal CFD models.
CFD simulation demonstrates that the curved leaflet design of the HIA-BL mechanical heart valve creates a Venturi effect that stabilizes the leaflets in the fully open position during peak systole.
Yokoyama et al. (2006) studied this question. Curved leaflets (Venturi passage) vs. Straight leaflets was evaluated on Flow profiles, pressure distribution and resulting torque. The HIA-BL heart valve with curved leaflets reduced boundary layer separation and produced an opening momentum to stabilize leaflets at peak systole compared to straight leaflets.
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