Medical devices, and in particular implantable medical devices, may be coated to minimize or substantially eliminate a
biological organism's reaction to the introduction of the
medical device to the
organism. The medical devices may be coated with any number of biocompatible materials. Therapeutic drugs, agents or compounds may be mixed with the biocompatible materials and affixed to at least a portion of the
medical device such as a
stent-graft. These therapeutic drugs, agents or compounds may also further reduce a
biological organism's reaction to the introduction of the
medical device to the
organism. In addition, these therapeutic drugs, agents and / or compounds may be utilized to promote healing, including the formation of blood clots. A
stent-graft fabricated from a thin-walled, high strength material provides for a more durable and lower profile endoprosthesis. The
stent-graft comprises one or more stent segments covered with a fabric formed by the weaving, knitting or braiding of a biocompatible, high tensile strength, abrasion resistant, highly durable
yarn such as
ultra high molecular weight polyethylene. The one or more stent segments may be
balloon expandable or self-expanding. The fabric may be attached to the stent segments utilizing any number of known materials and techniques. In addition, the pore size of the graft material may be varied.