Patent ID: 9474600
Filing Date: 2016-10-25
CPC Classification: A61F

Claim Text:
1. A prosthetic heart valve comprising a stent, an alloy wire and biological tissue leaflets, wherein: said biological tissue leaflets is sewn to said alloy wire which is wrapped with a first polyester cloth, and said alloy wire is sewn to the stent which is wrapped with a second polyester cloth; and said stent is ring-shaped and comprises a first stent layer made of a first material and a second stent layer made of a second material; wherein, said second stent layer is closely hooped by said first stent layer with said first stent layer on the outside of said second stent layer, and said first material and said second material are elastic materials, and the hardness of said second material is higher than that of said first material; wherein said first stent layer and said second stent layer are configured that the inner diameter of said first stent layer is smaller than the outer diameter of said second stent layer.