LOW PROFILE PROSTHESIS DELIVERY DEVICE

摘要

A delivery device system for delivering a low profile prosthesis and a method for releasably retaining a prosthesis on the device are described. The delivery device comprises a prosthesis disposed about the proximal end of the inner cannula. In a first configuration the prosthesis is releasably secured to the inner cannula in a radially inwardly contracted low profile delivery configuration and in a second configuration the prosthesis is at least partially radially outwardly deployed. First and second trigger wires extend longitudinally and circumferentially about the prosthesis in helical configurations. The first trigger wire is helically wound in a clockwise direction and the second trigger wire is helically wound in a counter-clockwise direction. When the first and second helical trigger wires are in a tensioned condition, the prosthesis is releasably secured to the inner cannula in a radially inwardly contracted low profile delivery configuration.

主权项

1. A delivery device system for delivering a low profile prosthesis to a body vessel comprising:
an inner cannula having a proximal end and a distal end; a prosthesis formed of biocompatible graft material and having a proximal end and a distal end, the prosthesis disposed about the proximal end of the inner cannula, wherein the prosthesis comprises a first configuration in which the prosthesis is releasably secured to the inner cannula in a radially inwardly contracted low profile delivery configuration and a second configuration in which the prosthesis is at least partially radially outwardly expanded; a first trigger wire having a tensioned condition and a relaxed condition and extending longitudinally and circumferentially about the prosthesis in a helical configuration from the proximal end of the prosthesis to the distal end of the prosthesis; a second trigger wire having a tensioned condition and a relaxed condition and extending longitudinally and circumferentially about the prosthesis in a helical configuration from the proximal end of the prosthesis to the distal end of the prosthesis; wherein when the first and second helical trigger wires are in the tensioned condition, the prosthesis is releasably secured to the inner cannula in the radially inwardly contracted low profile delivery configuration.