| 摘要 |
<p>A heart valve prostheses (121) comprising a generally annular body (123) which has an interior surface (127) that defines a central passageway for blood flow therethrough, occluder means (125) supported on said body for alternately blocking and then allowing the flow of blood through said passageway in a predetermined direction, said occluder means (125) being formed with means at opposite locations in the periphery thereof that cooperate with complementary means interior of said annular body, and a pair of opposed seat means (161,163) provided on the interior surface (127) of an annular body (123), each of said seat means (161,163) having a surface which is generally that of a portion of a frustum of a cone so that when the periphery of the occluder (125) engages said pair of seat means (161,163) in the closed position a good seal is achieved therealong.</p> |
