| 摘要 |
Valved prostheses include a support structure and a plurality of flexible polymer leaflets connected to the support structure, in which the leaflets have an improved structural design. The support structure has a plurality of commissure supports and scallops between the commissure supports. Generally, the flexible polymer leaflets project away from the support structure at an attachment edge where the leaflets connect to the support structure. In particular embodiments, the leaflets at the attachment edge are at an angle from about 5 degrees to about 85 degrees relative to a plane normal to the valve axis. In some embodiments, the flexible polymer leaflets having a coaptation depth from about 0.3 times the valve radius to about 0.8 times the valve radius. In further embodiments, the flexible polymer leaflets form a valve with a valve height from about one times the valve radius to about 2 times the valve radius and have leaflet lengths at least about 1 millimeter greater than the valve radius.
|
