Patent ID: 8470018

Claim:
A stent graft comprising at least one fenestration, the stent graft being for deployment into vessels of the human or animal body the stent graft comprising a tubular body of a biocompatible graft material, a plurality of stents attached to and supporting the tubular body, the or each fenestration comprising an aperture in the biocompatible graft material and two flaps, the two flaps comprising a biocompatible graft material, the aperture comprising a first side and a second side and an inner side and an outer side, the inner side being within the tubular body, the two flaps extending across the aperture on the inner side of the aperture whereby to close off the aperture, the two flaps comprising a first flap extending from the first side of the aperture and a second flap extending from the second side of the aperture and the first and second flaps overlapping each other to define an inner flap and an outer flap with the inner flap overlapping the outer flap when viewed from within the tubular body and a resilient reinforcement associated with the inner flap whereby to hold the inner flap and thereby the outer flap in a sealing position over the aperture, wherein the two flaps can be displaced to allow access through the fenestration.