Repositionable diameter constraints

摘要

An endoluminal prosthesis includes an expandable stent graft that includes a cannula extending through a lumen of the stent graft. A suture is threaded along the perimeter of the graft through openings therein, with an inner end of the suture mounted to the cannula. The cannula is rotatable relative to the graft to wind or unwind the suture around the cannula and cause the graft to become compressed when wound or allow the graft to expand when unwound. The cannula includes an attachment member for retaining an inner end of the suture, and the attachment member can release the inner end of the suture when adjustment of the graft diameter is no longer desired.

主权项

1. A system for deploying an endoluminal prosthesis, the system comprising:
a graft comprising biocompatible material having at least one lumen extending therethrough; a rotatable cannula extending at least partially through the graft lumen, the cannula being rotatable relative to the graft; and a suture having a first portion and a second portion, the first portion being coupled to the rotatable cannula within the graft lumen and windable around the cannula and the second portion being coupled to the graft, wherein an extent to which the suture is wound around the cannula adjusts in response to rotation of the rotatable cannula and an extent to which the suture is coupled to the graft correspondingly adjusts to vary a diameter of the graft.