Stent graft
Some embodiments are directed to a stent graft comprising a first stent graft having a first and a second stent and a first and 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 either 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, comprising:
a main body;
branch grafts that extend from an end of the main body;
an inner graft cover; and
an outer graft cover that covers at least a portion of the inner graft cover and that is completely uncovered by the branch grafts;
wherein the inner graft cover is made of a blood-impermeable non-porous material perforated to have one or more openings formed by punching therein to allow fluid communication of blood between an inner lumen of the main body and a space between the inner graft cover and the outer graft cover.
2. The stent graft of claim 1 , wherein the outer graft cover is made from a same material as the inner graft cover.
3. The stent graft of claim 1 , wherein the outer graft cover has one or more radiopaque markers thereon to provide visualization of a position or level of inflation of the outer graft cover during deployment.
4. The stent graft of claim 1 , wherein a diameter of the outer graft cover is larger than a diameter of the inner graft cover.
5. The stent graft of claim 1 , wherein the inner graft cover and the outer graft cover are connected at distal and proximal ends to form the space between the inner graft cover and the outer graft cover.
6. The stent graft of claim 1 , wherein each of the one or more openings in the inner graft cover are large enough to allow blood cells to enter the space between the inner graft cover and the outer graft cover from the lumen of the main body.
7. The stent graft of claim 6 , wherein each of the one or more openings in the inner graft cover are small enough to prevent flow patterns to form in the space that would delay blood coagulation.
8. The stent graft of claim 1 , wherein each of the one or more openings in the inner graft cover has a length of between 20 μm and 5 mm.
9. The stent graft of claim 1 , wherein each of the one or more openings in the inner graft cover has a length of between 100 μm and 2 mm.
10. The stent graft of claim 1 , wherein the one or more openings in the inner graft cover include two or more openings in the inner graft cover.
11. The stent graft of claim 1 , wherein the one or more openings in the inner graft cover are one or more holes in a graft material of the inner graft cover.
12. The stent graft of claim 1 , wherein the one or more openings in the inner graft cover are configured to only allow one directional fluid flow.
13. The stent graft of claim 1 , wherein the one or more openings in the inner graft cover are configured to permit fluid to flow from the inner lumen of the main body to the space between the inner graft cover and the outer graft cover and to prevent the flow of fluid from flowing in an opposite direction.
14. The stent graft of claim 1 , wherein the outer graft cover is configured to only cover a portion of the inner graft cover.
15. The stent graft of claim 1 , wherein the outer graft cover is configured to only cover a distal portion of the inner graft cover.
16. The stent graft of claim 1 , wherein the outer graft cover is configured to only cover a proximal portion of the inner graft cover.
17. The stent graft of claim 1 , wherein the outer graft cover is configured to only cover a mid-section of the inner graft cover.
18. A stent graft, comprising:
a main body;
branch grafts that extend from an end of the main body;
an inner graft cover; and
an outer graft cover that covers at least a portion of the inner graft cover and that is completely uncovered by the branch grafts;
wherein the inner graft is made from a non-porous material comprising at least two circumferentially aligned openings, said openings configured to allow fluid communication of blood between an inner lumen of the main body and a space between the inner graft cover and the outer graft cover.
19. The stent graft of claim 18 , wherein the non-porous material is blood impermeable.