Patent ID: 7993386

Claim:
An implantable prosthesis comprising: an unexpanded configuration and an expanded configuration; at least one radially-expandable tubular body comprising an upstream end; and at least one skirt extending from, and at least partially overlapping, at least a portion of said tubular body, said skirt comprising a first portion; in said expanded configuration, said first portion comprising a trough having a first section and a second section, said first section extending radially outwardly from said tubular body, at least a portion of said second section extending from said first section away from said tubular body, said second section being non-parallel with said first section, said skirt terminating in a peripheral edge that is spaced from a juncture between said skirt and said tubular body, wherein said at least one skirt is spaced at a distance between 2 and 15 mm from said upstream end of said tubular body and wherein said peripheral edge is downwardly tapered relative to said tubular body and to a greater diameter than said tubular body, wherein said skirt is coated with a material selected from the group consisting of collagen, fibrin, hyaluronic acid, chitosan, polysaccharide, and combinations thereof.