LEVI, TAMIR S.,SHARONI, RON,SHERMAN, ELENA,WINTNER, OREN H.,RUPP, KEVIN D.,NGUYEN, SON V.,CHADHA, AJAY,LINDSTROM, JEFF
申请号：
CA2910870
公开号：
CA2910870A1
申请日:
2015.05.07
申请国别(地区):
CA
年份:
2015
代理人:
摘要：
Embodiments of a radially collapsible and expandable prosthetic heart valvearedisclosed. The prosthetic valve can comprise an annular frame, leaflets, aninner skirt,and an outer skirt. The outer skirt can be secured to the outside of theinflow end portionof the frame, the outer skirt having longitudinal slack that buckles outwardradially whenthe valve is in the expanded configuration and which lies flat when the valveis in thecollapsed configuration. In some embodiments, the outer skirt is stiffer inthe axialdirection of the valve than in the circumferential direction of the valve. Inadditionalembodiments, the outer skirt comprises a self-expandable fabric comprisingfibers madeof a shape memory material having a shape memory set to enhance the radiallyoutwardbuckling of the outer skirt. Methods of crimping such valves to a collapsed orpartiallycollapsed configuration are also disclosed.
