Patent ID: 8435285

Claim:
An endoprosthesis for implantation, the endoprosthesis comprising: a covered self-expanding mesh stent, the stent having an inner surface defining a lumen, the cover engaged to an outer surface of the stent, the cover having a porosity in the radial direction, the covered stent having a length and an outer surface with preformed grooves and lands; an outer bioabsorbable polymeric mesh stent having an inner surface with preformed grooves and lands, the outer stent being engaged to the covered stent by the mating of the preformed grooves and lands of the outer stem; a retrieval loop element, the retrieval loop element being engaged to the covered stent so that a portion of the retrieval loop element is positioned between the cover and the stent and a portion of the retrieval loop element is positioned within the lumen of the covered stent, the retrieval element constructed and arranged to remove the covered stent from the outer stent after implantation of the endoprosthesis.