Patent ID: 8052747
Filing Date: 2011-11-08
Classification: A61F

Abstract:
1. A heart valve prosthesis comprising a ring-shaped body comprising an internal side surface defining a body opening, and end surfaces on blood down-flow and up-flow sides, leaflets installed on the blood down-flow end surface of the body and thus outside the body opening and adapted to turn between an open position thereof to let an entire blood flow through the body opening and a closed position to stop the blood flow, and leaflet turn stops, the turn stops including two pairs of prominences located on the blood down-flow end surface of the body, at least a portion of an internal surface of each one of the first pair of prominences is flat and able to interact with flat sections of the leaflets to restrict a reverse flow of blood in the closed position, the prominences being provided on opposite lateral sides thereof with guiding surfaces capable of interacting with corresponding bearing surfaces of lateral surfaces of leaflets as the leaflets open and close, each of the guiding surfaces defined by rotating a generating line thereof relative a turning axis of the respective leaflet, each prominence of the second pair of prominences being located opposite a part of the lateral surface of a corresponding leaflet most distant from a central surface thereof and being able to interact by its internal surface with the leaflet lateral surface part during opening of the heart valve prosthesis, the leaflet turn stops having at least two rests capable of interacting with leaflet surfaces facing down-flow of blood in the open position, and defining a turning angle of the leaflets.