EXPANDABLE POLYMERIC ENDOPROSTHESIS WITH SHAPE MEMORY

摘要

The invention relates to an endoprosthesis designed for delivery into a body lumen, the endoprosthesis being formed of a polymer comprising one or more of (a) a polycyclooctene, (b) a polymer blend comprising a crystalline polymer and an amorphous polymer, and (c) a reaction product of polyol, diisocyanate, and a dihydroxy-terminated polyhedral oligosilsesquioxane, wherein the endoprosthesis is in a collapsed state so that the endoprosthesis can be delivered into the body lumen, and wherein the endoprosthesis is capable of reverting from the collapsed state to an expanded state when warmed after delivery to the body lumen.