Sealing apparatus and methods of use

A system for treating an aneurysm, said system comprising:

• at least a first double-walled filling structure having an outer wall and an inner wall, wherein the filling structure is adapted to be filled with a hardenable fluid filling medium so that the outer wall conforms to the inside surface of the aneurysm and the inner surface forms a generally tubular lumen extending from a top end of the filling structure to a bottom end of the filling structure along a first longitudinal axis to provide blood flow therethrough,
• a second double-walled filling structure having an outer wall and an inner wall, wherein the second filling structure is adapted to be filled with a hardenable fluid filling medium so that the outer wall conforms to the inside surface of the aneurysm and the inner surface forms a generally tubular lumen extending from a top end of the filling structure to a bottom end of the filling structure along a second longitudinal axis to provide blood flow therethrough,
• wherein each of the first and the second filling structure comprises a sealing feature, the sealing features forming a fluid seal between the filling structures and the aneurysm when the first and second filling structures are positioned side-by-side across the aneurysm with the respective top ends positioned in an upstream direction and filled with the hardenable fluid filling medium, thereby minimizing or preventing blood flow downstream of the seal and inhibiting migration of the first and second filling structures, wherein the sealing feature of the first filling structure comprises a portion having a pre-defined first and the sealing feature of the second filling structure comprises a portion having a pre-defined second shape, each of the first and second shapes comprising a vertical cross-section shape of the respective filling structure along the respective longitudinal axis when extending vertically, the vertical cross-section shape having a horizontal width dimension varying along the respective longitudinal axis, wherein the horizontal width dimension of the first pre-defined shape differs from the horizontal width dimension of the second pre-defined shape along a common horizontal axis when the first and second filling structures are aligned in parallel along the respective longitudinal axis extending vertically and the respective top ends and/or bottom ends are aligned horizontally side-by-side,
• wherein the second shape is complementary to the first shape when the first and second double-walled filling structures are deployed within the aneurysm, the first and second filling structures being positioned adjacent side-by-side across the aneurysm and filled with the hardenable fluid when deployed, such that engagement between the portions having the respective first and second shapes inhibit relative longitudinal movement between the first and second filling structure,
• wherein the first and second filling structures are separately deliverable and positionable relative to each other along the respective longitudinal axes.