Valve prosthesis

Abstract

A valve prosthesis (10), comprising a stent (1), a leaflet (2), and a skirt (3); the stent (1) comprises an inflow end, an outflow end, and a plurality of wavy segments axially connected; the wavy segments comprise a plurality of reticular structure units disposed circumferentially; the leaflet (2) and the skirt (3) are fixed on the stent (1) respectively; the upper portion of the skirt (3) is provided with indentations (321); the skirt (3) is fixed with the leaflet (2) by means of the indentations (321); the skirt (3) further comprises first protrusion portions (323) extending toward the direction of the outflow end of the stent; one ends of the first protrusion portions (323) are connected with the indentations(321), and the other ends of the first protrusion portions are fixed to the stent (1); by such a way, the connection strength of the skirt (3) and the stent (1) is enhanced; and besides, when the valve prosthesis (10) is implanted at a lower position, perivalvular leakage preventing height can be increased by means of the first protrusion portions (323), thereby avoiding the leakage of a part of blood from the stent (1) and further improving the perivalvular leakage preventing effect.

Dependencies are inferred from the claim text.