Self-expanding bridging stent with anchoring projections and methods for use
The present disclosure provides a stent graft comprising (a) a self-expandable stent structure having a first end and a second end, wherein the self-expandable stent structure defines a lumen, (b) at least one restraint configured to be coupled to an exterior surface of the stent graft in a compressed condition, and wherein the at least one restraint is configured to be broken to permit the stent graft to transition to an expanded condition, and (c) a first plurality of anchoring projections coupled to the exterior surface of the stent graft adjacent to the first end of the self-expandable stent-structure.
1. A stent graft, comprising:
a self-expandable stent structure having a first end and a second end, wherein the self-expandable stent structure defines a lumen;
a first plurality of anchoring projections coupled to an exterior surface of the stent graft adjacent to the first end of the self-expandable stent structure, wherein each anchoring projection of the first plurality of anchoring projections comprises a longitudinally arranged stent having a plurality of crimps, wherein each crimp of the plurality of crimps includes an acute peak extending radially away from the exterior surface of the stent graft in an expanded condition; and
at least one restraint coupled to the exterior surface of the stent graft in a compressed condition, wherein the at least one restraint covers at least a portion of the first plurality of anchoring projections in the compressed condition, and wherein the at least one restraint is configured to be broken to permit the stent graft to transition to the expanded condition.
2. The stent graft of claim 1 , further comprising:
a second plurality of anchoring projections coupled to the exterior surface of the stent graft adjacent to the second end, wherein each anchoring projection of the second plurality of anchoring projections comprises a longitudinally arranged stent having a plurality of crimps.
3. The stent graft of claim 2 , wherein the plurality of crimps of each of the longitudinally arranged stents extend radially outward when the stent graft is in the expanded condition.
4. The stent graft of claim 2 , wherein the plurality of crimps of each of the longitudinally arranged stents extend radially outward a distance ranging from about 0.1 mm to about 3 mm from the exterior surface of the stent graft when the stent graft is in the expanded condition.
5. The stent graft of claim 2 , wherein the plurality of crimps of each of the longitudinally arranged stents are flattened when the stent graft is in the compressed condition.
6. The stent graft of claim 2 , wherein the first plurality of anchoring projections comprises at least three anchoring projections and wherein the second plurality of anchoring projections comprises at least three anchoring projections.
7. The stent graft of claim 2 , wherein each of the first plurality of anchoring projections is structurally different than each of the second plurality of anchoring projections.
8. The stent graft of claim 1 , wherein a diameter of the stent graft ranges from about 4 mm to about 30 mm.
9. The stent graft of claim 1 , wherein the stent graft has a length ranging from about 20 mm to about 250 mm.
10. The stent graft of claim 1 , wherein the at least one restraint is configured to remain coupled to the exterior surface of the stent graft after being broken.
11. The stent graft of claim 1 , wherein the first plurality of anchoring projections are substantially flat with the exterior surface of the stent graft in the compressed condition, and wherein the first plurality of anchoring projections extend radially away from the exterior surface of the stent graft in the expanded condition.