Patent ID: 7645298

Claim:
A stent graft including a wall and at least one fenestration assembly in the wall, the fenestration assembly including a first metal wire ring defining a first aperture in the wall of the stent graft and a second metal wire ring defining a smaller aperture within the first metal wire ring and a biocompatible flexible graft material extending between the first metal wire ring and the second metal wire ring, whereby to allow flexible positioning of the second metal wire ring with respect to the first metal wire ring, a third metal wire ring intermediate the first metal wire ring and the second metal wire ring, the first metal wire ring, the second metal wire ring and the third metal wire ring being joined together by an integral hinge arrangement, the first metal wire ring, the second metal wire ring, the third metal wire ring and the integral hinge arrangement comprising a single continuous length of nitinol wire or stainless steel wire, and the graft material extending between the first metal wire ring and the second metal wire ring providing a skewed frusto-conical extension between the first metal wire ring and the second metal wire ring, whereby the smaller aperture is directed towards a selected end of the stent graft.