Composite stent grafts for in situ assembly and related methods

摘要

Composite stent grafts can include separate components that are capable of being repositioned relative to each other in situ. In some examples, a stent and a graft that are attached to each other in an insertion package do not overlap each other. The graft and stent are moved relative to each other in situ.

主权项

1. A prosthetic assembly comprising:
a graft defining a first opening, a second opening, and a third opening; a first stent attached to the graft at the first opening such that the first stent does not overlap the graft; and a second stent attached to the graft at the second opening;
wherein the graft comprises a trunk and first and second branches that extend from the trunk at a bifurcation, wherein the first opening is at an end of the trunk, the second opening is at an end of the first branch, and the third opening is at an end of the second branch;wherein the second branch is shorter than the first branch such that the first branch comprises a first portion extending from the bifurcation to a location aligned with the end of the second branch and a second portion extending longitudinally beyond the end of the second branch and wherein there are no supporting structures along the first portion of the first branch and along the second branch, thus providing a non-supported first portion of the first branch and a non-supported second branch; andwherein the prosthetic assembly is configured such that, prior to, and during insertion into a patient, the non-supported second branch is fully extended, and the non-supported second branch does not overlap the attached second stent.