Curved butterfly bileaflet prosthetic cardiac valve
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United States of America Patent
Stats
-
Jun 25, 1991
Issued Date -
N/A
app pub date -
Nov 14, 1989
filing date -
Jul 24, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An annular valve body having a central passageway for the flow of blood therethrough with two curved leaflets each of which is pivotally supported on an accentric positioned axis in the central passageway for moving between a closed position and an open position. The leaflets are curved in a plane normal to the eccentric axis and positioned with the convex side of the leaflets facing each other when the leaflets are in the open position. Various parameters such as the curvature of the leaflets, the location of the eccentric axis, and the maximum opening angle of the leaflets are optimized according to the following performance criteria: maximize the minimum peak velocity through the valve, maximize the net stroke volume, and minimize the mean forward pressure difference, thereby reducing thrombosis and improving the hemodynamic performance.
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