Prosthetic heart valve

Details Prosthetic heart valve Prosthetic heart valve

1992-07-14

1993-08-17

Green, Randall L.

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

Heart valve

Having rigid or semirigid pivoting occluder

137521, 137527, A61F 206, F16K 1500, F16K 1700, F16K 2104

Patent

active

052364518

ABSTRACT:
Bi-leaflet heart valves have improved flow characteristics in their open position as a result of employing valve bodies of elongated axial dimension. By elongating the axial dimension of valve bodies which have straight, smooth interior wall surfaces oriented parallel to the centerline through the valve and to the flow path of blood, and by employing a pair of occluders which have major surfaces that are rectilinear and can assume an orientation that is substantially parallel to the centerline in the open position, a streamlining of blood flow occurs. The pivot arrangements avoid the use of acute angular surface orientations and cause the occluders, although aligned substantially parallel to blood flow in the open position, to promptly pivot toward the closed position upon reversal of blood flow. This streamlining substantially reduces turbulence and results in low head loss, both significant advantages in bi-leaflet heart valve performance.

REFERENCES:
patent: 4178638 (1979-12-01), Meyer
patent: 4254508 (1981-03-01), Bokros
patent: 4272854 (1981-06-01), Bokros
patent: 4863458 (1989-09-01), Bokros
patent: 5147390 (1992-09-01), Campbell

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