Graft systems having filling structures supported by scaffolds and methods for their use
Aneurysms are treated by filling at least one double-walled filling structure with a curable medium within the aneurysm. The filling structures may be delivered over balloon deployment mechanisms in order to shape and open tubular lumens therethrough. Scaffolds are placed into the tubular lumens in order to help maintain the shape, anchor the filling structures in place, and provide improved blood flow transition into and out of the tubular lumens.
1. A system for treating an aneurysm, said system comprising:
a filling structure having an outer wall and an inner wall, wherein the filling structure comprises an internal space for filling with a hardenable fluid filling medium;
a central lumen formed by the inner wall that provides a path for blood flow across the aneurysm; and
a radially expandable stent graft attached to the filling structure such that the blood flows into the stent graft and fails to contact the inner wall of the filling structure,
wherein the stent graft comprises a stent portion and a graft portion, and
wherein a portion of the radially expandable stent graft extends outwardly from one end of the stent graft portion and is configured to anchor the stent graft to a blood lumen wall.
2. The system of claim 1 , wherein the stent graft extends over substantia an entire length of the central lumen extending through the filling structure.
3. The system of claim 1 , wherein the stent graft is adapted to extend outwardly from at least one end of the central lumen to the other end of the central lumen.
4. The system of claim 3 , wherein the stent graft is adapted to extend outwardly from at least one end of the central lumen and into an adjacent blood vessel.
5. The system of claim 1 , wherein substantially the entire filling structure is formed from a compliant material.
6. The system of claim 1 , further comprising an inlet for the hardenable fluid filling medium to enter the filling structure.
7. The system of claim 1 , wherein the inlet for the hardenable fluid filling medium to enter the filling structure is located downstream from blood flow path.
8. The system of claim 1 , wherein the stent graft is balloon expandable.
9. The system of claim 1 , wherein the stent graft is self-expanding.
10. The system of claim 1 , wherein the stent graft is distinct and separate from the filling structure.
11. The system of claim 1 , wherein the stent graft is configured to be separately deployable from the filling structure.
12. The system of claim 1 , wherein the stent graft is configured to be radially expanded independently of the filling structure.
13. The system of claim 1 , wherein the central lumen is flared such that a diameter of a first portion of the lumen is greater than a diameter of a second portion of the lumen; and
a radially expandable stent graft attached to the filling structure such that the blood flows into the stent graft and fails to contact the inner wall of the filling structure.
14. The system of claim 13 , wherein the diameter of a first end of the central lumen is greater than the diameter of a second end of the central lumen.