Patent ID: 6358284
Filing Date: 2002-03-19
Classification: A61F,A61L

Abstract:
A unitary multi-layered graft prosthesis comprising a first sheet of a collagen-based matrix structure removed from a submucosa tissue source and having an endotoxin level less than 12 endotoxin units per gram, the first sheet having a first edge and a second opposite edge, formed in the shape of a tube, wherein the second opposite edge of the first sheet extends over the first edge of the first sheet to define a multiple layered overlapped region, wherein the layers in the overlapped region are fixed to one another; anda second sheet of a collagen-based matrix structure removed from a submucosa tissue source and having an endotoxin level less than 12 endotoxin units per gram, the second sheet having a first edge and a second opposite edge, wherein said second sheet is in adherent contact with the tube of said first sheet and the first edge and second opposite edge of the second sheet are joined together along the length of the tube without perforating the underlying tube of said first sheet.