| 主权项 |
1. A prosthetic valve comprising:
a leaflet frame; and a plurality of leaflets that are coupled to the leaflet frame, each leaflet including two leaflet sides, a leaflet free edge and a leaflet base, wherein the leaflet base of each leaflet has a truncation in which the leaflet in cross section shows a line in an alpha plane onto the leaflet frame, the leaflet frame having a tubular shape, the leaflet frame defining a plurality of leaflet windows wherein each of the leaflet windows includes two leaflet window sides, a leaflet window base, and a leaflet window top; and a film that is coupled to the leaflet frame and defining at least one leaflet extending from each of the leaflet windows, wherein each leaflet has a shape of an isosceles trapezoid having two leaflet window sides, a leaflet base and a leaflet free edge opposite the leaflet base, wherein the two leaflet sides diverge from the leaflet base, wherein the leaflet base is flat, wherein the leaflet base is coupled to the window base and wherein each of the two leaflet sides are coupled to one of the two leaflet window sides, wherein each leaflet includes a central region and two side regions on opposite sides of the central region, wherein the central region is defined by a shape of an isosceles triangle defined by two central region sides, the leaflet base and the leaflet free edge, wherein the two central region sides converge from the leaflet base, and wherein each of the side regions have a shape of a triangle and each are defined by one of the central region sides, one of the leaflet sides, and the leaflet free edge, wherein each of the two side regions and the central region are planar when the prosthetic valve is in a closed position under unpressurized conditions. |
