Some embodiments are directed to a stent graft comprising a first stent graft having a first stent, a first inner graft supported by the first stent, a second inner graft supported by the first stent, and an outer graft. The second inner graft can be spaced apart from the first inner graft so that a portion of the first stent is not covered by the first inner graft or the second inner graft. A first and second portion of the outer graft can be attached to the first stent, the outer graft being unsupported by the stent between the first and second portions so as to form a fillable space between the outer graft, the first inner graft, and the second inner graft. Some embodiments further comprise a second stent graft deployable within the inside of the first stent graft to sealingly cover the uncovered portion of the first stent.
1. A stent graft system comprising:
a first stent graft having a first stent, a first inner graft supported by the first stent, a second inner graft supported by the first stent, and an outer graft;
wherein:
the second inner graft is spaced apart from the first inner graft so that a portion of the first stent is not covered by either the first inner graft or the second inner graft; and
a first portion and a second portion of the outer graft are attached to the first stent, the outer graft being unsupported by the stent between the first and second portions so as to form a fillable space between the outer graft, the first inner graft, and the second inner graft;
a second stent graft deployable within the inside of the first stent graft so as to sealingly cover the uncovered portion of the first stent, the second stent graft having a second stent and a second graft and a length that is greater than a length of the uncovered portion of the first stent graft.
2. The stent graft system of claim 1 , wherein the first and second inner grafts are adjacent to an outside surface of the first stent.
3. The stent graft system of claim 1 , wherein at least a middle portion of the outer graft has a larger circumference than the first inner graft and the second inner graft.
4. The stent graft system of claim 1 , wherein the outer graft is expandable away from the first and second inner grafts.
5. The stent graft system of claim 1 , wherein the outer graft is configured to expand against an inside surface of a vessel wall when blood flows through the uncovered portion of the first stent graft.
6. The stent graft system of claim 1 , wherein at least one of the first stent and the second stent is balloon expandable or self-expandable.
7. The stent graft system of claim 1 , wherein the first stent graft is a bifurcated stent graft.
8. The stent graft system of claim 1 , further comprising one or more radiopaque markers supported by the outer graft.
9. The stent graft system of claim 1 , wherein the uncovered portion of the first stent graft is located in a middle portion of the first stent graft.
10. The stent graft system of claim 1 , wherein the first stent graft is positioned in a branch vessel, the first stent graft being supported by a main branch stent graft.
11. The stent graft system of claim 10 , wherein the branch vessel is an iliac artery.