Patent ID: 6395025
Filing Date: 2002-05-28
Classification: A61F

Abstract:
A mechanical heart valve prosthesis, comprising:an orifice body having a lumen surface and an orifice for the passage of blood therethrough, the orifice body including at least two opposed pivot depressions disposed on the lumen surface, the pivot depressions having smoothly curved central portions and substantially linear outer portions which form upstream and downstream angles with a tangent line of the lumen surface, the depressions configured to reduce disturbed flow and stagnation; at least one occluder disposed in the orifice and pivotally attached to the orifice body, the occluder movable about an axis of rotation between an open position and a closed position such that the orifice is substantially open when the occluder is in its open position and the orifice is substantially closed when the occluder is in its closed position, the occluder further having two opposed occluder protrusions rotatably disposed in the pivot depressions; and an open protrusion stop for the occluder, the stop protrusion disposed on the lumen surface of the orifice body.