Patent ID: 9327058
Filing Date: 2016-05-03
CPC Classification: A61L

Claim Text:
1. A stent-graft for insertion into a body vessel for use alone or with a second stent-graft capable of exerting a sealing or anchoring force against the wall of the body vessel, the stent-graft comprising: a radially expandable cylindrical body having a proximal cuff, an elongated body, and a distal cuff, the elongated body having a substantially similar outer diameter, the elongated body having greater longitudinal length than the proximal and distal cuffs; and a hydrophilic polyurethane hydrogel layer disposed about at least one of the proximal and distal cuffs, the polyurethane hydrogel layer having a pre-dried condition, the cuff with the polyurethane hydrogel layer disposed about it having the same outer diameter as the elongated body in the pre-dried condition; wherein upon exposure to an aqueous environment, the pre-dried polyurethane hydrogel layer expands so that the outer diameter of the cuff is greater than the outer diameter of the elongated body to exert a sealing force against the wall of the body vessel, wherein the pre-dried polyurethane hydrogel layer is disposed to expand between 10-30% larger than the outer diameter of the elongated body to provide a proper fit in the body vessel to reduce irritation and inflammation.