| 摘要 |
A bi-directional stent delivery system includes an inner elongate shaft, a radially expandable prosthesis disposed over the inner elongate shaft, an outer elongate shaft, and a shuttle sheath disposed over the radially expandable prosthesis. The distal portion of the inner shaft is releasably coupled to the distal portion of the shuttle sheath, and the distal portion of the outer shaft is releasably coupled the proximal portion of the shuttle sheath. Distal advancement of the inner shaft advances the shuttle sheath distally when the outer shaft is uncoupled from the shuttle sheath, thereby allowing the prosthesis to radially expand from a proximal end to a distal end. Proximal retraction of the outer shaft retracts the shuttle sheath proximally when the inner shaft is uncoupled from the shuttle sheath, thereby allowing the prosthesis to radially expand from a distal end to a proximal end thereof. |
| 主权项 |
1. A bi-directional stent delivery system, said system comprising:
an elongated inner shaft having a proximal portion and a distal portion; a radially expandable prosthesis disposed over the inner shaft, the prosthesis having a radially collapsed configuration and a radially expanded configuration, wherein in the collapsed configuration the prosthesis is adapted to be delivered through a vasculature, and in the expanded configuration the prosthesis engages a vessel wall; an elongated outer shaft having a proximal portion and a distal portion; and a shuttle sheath having a proximal portion and a distal portion, the shuttle sheath disposed over the radially expandable prosthesis and releasably lockable to the inner shaft and the outer shaft, wherein the stent delivery system is configured to be selectively actuated between a proximal deployment configuration and a distal deployment configuration, when the stent delivery system is in the proximal deployment configuration, the shuttle sheath is locked with the inner shaft and unlocked from the outer shaft such that distal advancement of the inner shaft advances the shuttle sheath distally relative to the outer shaft, thereby allowing the prosthesis to radially expand from a proximal end thereof to a distal end thereof, and when the stent delivery system is in the distal deployment configuration, the shuttle sheath is unlocked from the inner shaft and locked with the outer shaft such that proximal retraction of the outer shaft retracts the shuttle sheath proximally relative to the inner shaft, thereby allowing the prosthesis to radially expand from the distal end thereof to the proximal end thereof. |
