초록 ▼

A covered stent for treating a stenotic region in a blood vessel. The stent covering has different porosities in different regions. In those regions, typically the ends, where tissue ingrowth and re-endothelialization are desired, the stent covering is more porous, and in those regions were it is de

A covered stent for treating a stenotic region in a blood vessel. The stent covering has different porosities in different regions. In those regions, typically the ends, where tissue ingrowth and re-endothelialization are desired, the stent covering is more porous, and in those regions were it is desirable to inhibit such ingrowth, the stent covering is substantially non-porous.

대표청구항 ▼

[ What is claimed is:] [1.] An endoprosthesis implant comprising:a) a stent having an expandable frame structure;b) a stent covering disposed on said stent, said stent covering having opposed ends, a first region of the stent covering comprising portions of the stent covering adjacent the opposed en

[ What is claimed is:] [1.] An endoprosthesis implant comprising:a) a stent having an expandable frame structure;b) a stent covering disposed on said stent, said stent covering having opposed ends, a first region of the stent covering comprising portions of the stent covering adjacent the opposed ends and a second region of the stent covering comprising a middle portion of the stent covering interposed between the first region portions;c) the first region having a plurality of pores extending between an inner surface and a spaced apart outer surface of the stent covering defining a first porosity, and the second region having a second porosity different than said first porosity, said second porosity being defined by said second region having fewer pores than said first region; andd) each pore in the first region having a pore diameter at the stent covering outer surface of from about 30 to about 120 micrometers.