Heart valve prosthesis

Details Heart valve prosthesis Heart valve prosthesis

A - Human Necessities

61

F

3/117

A61F 2/24 (2006.01)

Patent

CA 1147905

-31- HEART VALVE PROSTHESIS ABSTRACT OF THE DISCLOSURE Single or double-leaflet heart valves having improved flow through the orifice defined by an annular valve body include a pair of leaflets which may be arcuate or flat in cross section. Guides protrude oppositely from the leaflets and are received in complementary depressions in the interior wall surface preferably of a pair of standards which extend downstream from the annular valve body at generally diametrically opposite locations. The depressions are preferably elongated so that, as the leaflets pivot between the open and closed positions, the guides move from one end of the elongated depressions to the other. Eccentric pivot axes provide for quick response of the leaflets, and the location of the depressions in the standards moves the leaflets out of the annular valve body, reducing resistance to the free flow of blood therethrough. The leaflet valve members are preferably arcuate in cross section and may be essentially a portion of the wall of a circular tube.

357428

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