초록 ▼

Heart valve prostheses have annular valve bodies with central passageways and valve members supported for pivotal and translational movement between open and closed positions. The occluders, which may be either of a bileaflet or single occluder design, are supported within the bodies by pairs of ear

Heart valve prostheses have annular valve bodies with central passageways and valve members supported for pivotal and translational movement between open and closed positions. The occluders, which may be either of a bileaflet or single occluder design, are supported within the bodies by pairs of ears extending from opposite locations to interengage with corresponding arcuate depressions to guide the occluders between their closed positions where they seat against upstream protuberances of the valve bodies and their open position where they are positioned between the upstream protuberances and downstream protuberances.

대표청구항 ▼

A heart valve prosthesis for allowing normal blood flow therethrough from upstream to downstream including: a generally annular valve body having an interior wall which defines a central passageway for blood flow therethrough, occluder means for blocking the reverse flow of blood through said passag

A heart valve prosthesis for allowing normal blood flow therethrough from upstream to downstream including: a generally annular valve body having an interior wall which defines a central passageway for blood flow therethrough, occluder means for blocking the reverse flow of blood through said passageway, ears extending from opposite locations on the periphery of said occluder means, complementary depressions formed in said interior wall of said valve body which are proportioned to receive said ears and to guide said ears along a curving path as said occluder means moves between closed and open positions, stop means in said annular valve body against which the upstream face of said occluder means abuts in the closed position, first and second bump means protruding from said interior wall and being associated with each of said depressions, said first bump means being located downstream of said occluder means and said second bump means being located upstream of said occluder means in said closed position, said first bump means being in contact with the downstream face of said occluder means during moving to said open position and determining the orientation of said occluder means in the fully open position, and the shape of said depressions being such to, in cooperation with said bump means, guide said occluder means in both pivotal and translational movement between said closed and open positions, whereby said downstream face of said occluder means slides against said first bump means during opening of said occluder means.