Novostia Sa

Philippe Perrier

The invention relates to a mechanical prosthetic heart valve () comprising an annular support () having an internal peripheral wall () centered about a longitudinal axis (X) and delimiting an internal passage, and at least two mobile leaflets (), preferably three leaflets (), arranged in such a way as to each be able to effect a rotational movement about an axis of rotation perpendicular to said longitudinal axis (X) so that the valve () can pass from a closed configuration to an open configuration and vice versa. Each leaflet comprises a central part (), and two lateral winglets () flanking the central part () symmetrically with respect to a plane of symmetry (Z) of the leaflet. Each winglet () comprises one of two terminal portions (). The annular support () comprising two opposite edges () and as many extensions () as the number of leaflets, which extend axially from one of the opposite edges (), a profiled recess () being created on two opposite sides of each extension (), the recesses () acting as guide surfaces for the respective terminal portions () of each leaflet () as the valve () passes from an open configuration to a closed configuration, and vice versa. A contact zone of each leaflet () in the open position with the internal peripheral wall () is less than 15% of the total width of the leaflet () extending between the extremities of the two terminal portions ().

Mechanical prosthetic heart valve

The invention relates to a mechanical prosthetic heart valve () comprising: an annular support () having an internal peripheral wall () centered about a longitudinal axis (X) and delimiting an internal passage, and at least two mobile leaflets, preferably three mobile leaflets (), arranged in such a way as to each be able to effect a rotational movement about an axis of rotation perpendicular to said longitudinal axis (X) so that the valve () can pass from a closed configuration to an open configuration and vice versa. Each leaflet () comprises a leading edge () designed to come against a portion of the internal peripheral wall () of the annular support () when the valve is in a closed configuration, an internal surface () extending from the leading edge (), and an external surface () opposite the internal surface () and extending from the leading edge (). The annular support () comprises two opposite edges () and as many extensions () as the number of leaflets (), which extend axially from one of the opposite edges. The annular support () further comprising, on the internal peripheral wall (), two lower bearing members () per leaflet which contact the internal surface () of the associated leaflet () at respective bearing zones () when the valve () is in a closed configuration. A distance between the center of respective bearing zones () and the leading edge () of each leaflet is greater than a thickness of the leaflet at the center of said respective bearing zones ().

The invention relates to a mechanical prosthetic heart valve () comprising: an annular support () having an internal peripheral wall () centered about a longitudinal axis (X) and delimiting an internal passage, and at least two mobile leaflets, preferably three mobile leaflets (), arranged in such a way as to each be able to effect a rotational movement about an axis of rotation perpendicular to said longitudinal axis (X) so that the valve () can pass from a closed configuration to an open configuration and vice versa. Each leaflet () comprises a leading edge () designed to come against a portion of the internal peripheral wall () of the annular support () when the valve is in a closed configuration, an internal surface () extending from the leading edge (), and an external surface () opposite the internal surface () and extending from the leading edge (). The annular support () comprises, on the internal peripheral wall (), at least one lower bearing member () per leaflet situated between two of said extensions () and designed to be in contact against the corresponding leaflet when the valve () is in the closed configuration, and two upper bearing members (). The two upper bearing members () comprise each a distal end (). Each distal end () is designed to come to bear against a bearing zone of the external surface () of the leaflet (). The center of the bearing zone is set back from the leading edge () of the leaflet () by a distance greater than a thickness of said leaflet at the center of said bearing zone.

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Saint-Nom-la-Bretèche, France

Philippe Perrier