Retainers for transcatheter heart valve delivery systems

摘要

A delivery device 10 for a collapsible prosthetic heart valve includes a catheter assembly 16 including a shaft 26 around which a compartment 23 is defined, the compartment 23 being adapted to receive the valve in an assembled condition, and a retainer 30 including a pusher 32 and a holder 34 adapted to retain a stent portion 106 of the valve. The catheter assembly 16 also includes a distal sheath 24 adapted to selectively cover and uncover the compartment 23 and the valve, the distal sheath 24 extending around the shaft 26 at least when the distal sheath 24 covers the compartment 23. The pusher 32 includes one or more recesses 40 in a retention edge 33 thereof, each recess 40 being adapted to receive a junction 107 at an end of the stent portion 106 of the valve. The holder 34 includes one or more elongated ribs 50, each rib 50 being adapted to fit into a cell opening 108 of the stent portion 106 of the valve.