Patent ID: 6709455
Filing Date: 2004-03-23
Classification: A61F

Abstract:
A body compatible endoprosthesis, including:a tubular body including a graft layer formed of a graft material and having a graft layer surface that forms an inside surface of the tubular body and defines a fluid passage in the tubular body, wherein the graft layer has a first average permeability and is biocompatible with a first fluid contained in the fluid passage; wherein the tubular body further includes a tubular structural layer comprising first and second sets of filaments helically wound in respective first and second different directions, and having a structural strength sufficient to maintain the fluid passage open in opposition to radially inward forces due to surrounding tissue; and wherein the tubular body further includes a membrane layer formed of a membrane material, substantially surrounding the graft layer, and having a second average permeability of at most about 100 cc/cm2/min. at 120 mm Hg. and less than the first average permeability.