Patent ID: 7727271

Claim:
An implantable graft comprising: an elongate graft tube having opposed ends and a tubular wall therebetween having an inner wall layer comprising a first material and an outer wall layer comprising a second material different than the first material, the first material being expanded polytetrafluoroethylene (ePTFE) and the second material being a textile material, said outer wall layer being attached to said inner wall layer such that said outer wall layer directly contacts said inner wall layer, a portion of said outer wall layer defining an attachment site for attaching said graft tube to a stent; and a reinforcement member attached to said outer wall layer such that said reinforcement member directly contacts said attachment site, said reinforcement member reinforcing said attachment site wherein said reinforcement member comprises a separate ring of material for strengthening the attachment site, said reinforcement member having a longitudinal dimension defined by opposed end edges which is less than a longitudinal dimension defined by the opposed ends of said graft tube.