Patent ID: 8821564

Claim:
A method of treating a segment of a blood vessel with stent grafts, comprising: positioning a first stent graft across the segment of the blood vessel to be treated, the first stent graft having a first stent, an inner graft having a first portion and a second portion, and an outer graft; wherein: the second portion of the inner graft is spaced apart from the first portion of the inner graft so that a portion of the first stent is uncovered by the inner graft; and a first portion and a second portion of the outer graft are attached to at least one of the first stent and the inner graft, the outer graft being unsupported by the first stent or inner graft between the first and second portions of the outer graft so as to create a fillable space between the outer graft and the inner graft; allowing the space between the inner graft and the outer graft to fill through the uncovered portion of the stent with blood so that the outer graft expands outwardly away from the inner graft; and deploying a second stent graft inside the first stent graft so as to sealingly cover the uncovered portion of the first stent graft, the second stent graft having a second stent and a second graft.