Composite curvature bileaflet prosthetic heart valve with serpen

Details Composite curvature bileaflet prosthetic heart valve with serpen Composite curvature bileaflet prosthetic heart valve with serpen

1992-08-19

1994-05-24

Green, Randall L.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Heart valve

Having rigid or semirigid pivoting occluder

137521, 137527, A61F 224, F16K 1500, F16K 1700, F16K 2104

Patent

active

053144678

ABSTRACT:
A heart valve prosthesis having an annular valve housing or base and two leaflets supported for pivotable movement within the annular valve housing. Each valve leaflet possesses a composite curvature shape with pivoting hinges being purposely offset to the hydraulic force center of the annular valve housing to provide fast response of the leaflets to flow direction change. The hinge mechanism includes modified serpentine curved hinge recesses in the annular valve housing for receiving elongated leaflet ears allowing the leaflets to change their motion modes approaching the closed position to reduce leaflet-edge tangential velocity and impact of the minor edges against one another and the major edges against the housing seat upon closure. The composite curvature leaflets allow maximal central flow with consequent lower pressure drop during the open phase and minimal regurgitation during the closing phase. The curved leaflet major trailing edges in the open position reduces boundary separation and associated turbulence along the flow stream direction.

REFERENCES:
patent: 4308624 (1982-01-01), Klanitter
patent: 4689046 (1987-08-01), Bokros
patent: 4863467 (1989-09-01), Bokros
patent: 4872875 (1989-10-01), Hwang
patent: 4888010 (1989-12-01), Bokros
patent: 5080669 (1992-01-01), Tascon et al.

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