Prosthesis comprising a coiled stent and method of use thereof
View Patent ↗The present invention is directed to a prosthesis and method for treating, repairing, and/or replacing an abdominal aortic aneurysm. The prosthesis includes a coiled stent comprised of shape memory material having first and second anchoring zones and an intermediate zone. The prosthesis also includes graft material engaging at least a portion of the stent. During delivery of the prosthesis, the stent is in a substantially straight longitudinal configuration, and after delivery of the prosthesis the stent is returned to a coiled configuration. The diameter of the prosthesis may be adjusted by controlling the degree to which the stent is coiled.
1. A prosthesis comprising:
a single smooth, spiral coiled stent having a plurality of rings formed from an elongate, straight, single member of shape memory material, the stent including first and second anchoring zones and an intermediate zone, the first and second anchoring zones having a ring to ring distance in the range from about 2 mm to about 5 mm and the intermediate zone having a ring to ring distance in the range from about 4 mm to about 10 mm, and wherein the intermediate zone is longer than the first and second anchoring zones, at least one of the first and second anchoring zones being configured for mating with an additional prosthesis;
a sealing device configured to fit over substantially all of the at least one of the first and second anchoring zones, the sealing device comprising a compressible foam; and
graft material engaging at least a portion of the stent, the single member configured to be pulled into a substantially straight longitudinal configuration prior to delivery, and returned to the coiled configuration to expand the graft material.
2. The prosthesis of claim 1 , wherein the shape memory material is comprised of a metal alloy.
3. The prosthesis of claim 1 , wherein the stent is attached to an interior surface or an exterior surface of the graft material.
4. The prosthesis of claim 1 , wherein during delivery of the prosthesis, the graft material has a profile diameter less than about fourteen French.
5. The prosthesis of claim 1 wherein the stent is coated with heparin.
6. The prosthesis of claim 1 further comprising a secondary stent attached to the first anchoring zone.