Patent ID: 8216297
Filing Date: 2012-07-10
Classification: A61F

Abstract:
1. An endovascular graft comprising: a tubular structure having a first end and a second end, said tubular structure having a wall defining a lumen between said first and second ends, said tubular structure having an outer surface and an inner surface; a circumferential cuff, said cuff comprising an interior cavity which is bifurcated such that said interior cavity comprises a circumferential outer chamber and a circumferential inner chamber; an elongate circumferential intermediate layer having a transverse first edge and a transverse second edge which are attached to said outer surface of said tubular structure such that said inner chamber is defined between an annular portion of said outer surface of said tubular structure and said intermediate layer; and an elongate circumferential outer layer having a transverse first edge and a transverse second edge which are attached to an outer surface of said intermediate layer or said outer surface of said tubular structure such that said outer chamber is defined between said outer layer and said intermediate layer; wherein said outer chamber comprises a stiffened expansion substance following completion of the implantation of the graft in a patient; wherein said inner chamber comprises a fluid during implantation of the graft in the patient such that the inner chamber expands into the lumen, and wherein said fluid is configured to be removed from the inner chamber prior to the completion of the implantation of the graft in the patient such that the inner chamber assumes a collapsed state which results in an insubstantial or no reduction in a cross sectional area of the lumen of the tubular structure.