Implantable medical devices
A medical device includes a balloon catheter having an expandable member, e.g., an inflatable balloon, at its distal end and a stent or other endoprosthesis. The stent is, for example, an apertured tubular member formed of a polymer and is assembled about the balloon. The stent has an initial diameter for delivery into the body and can be expanded to a larger diameter by inflating the balloon.
1. A product comprising an endoprosthesis having a body formed of a polymer including a reaction product of polyol, isocyanate, and a polyhedral oligosilsequioxane diol, the endoprosthesis being designed for delivery into a body lumen, wherein the endoprosthesis is in a deformed state, and wherein the endoprosthesis is capable of reverting from the deformed state to an expanded state when warmed.
2. The method of claim 1 , wherein the endoprosthesis is a stent.
3. The product of claim 1 , wherein the endoprosthesis is biodegradable.
4. The product of claim 1 , wherein the endoprosthesis has a tubular shape.
5. The product of claim 1 , wherein the polyol is selected from the group consisting of be polyethylene glycol, polycaprolactone polyol, polycyclooctene polyol, and trans-1,4 butadiene polyol, transisoprene polyol.
6. The product of claim 1 , wherein the endoprosthesis comprises 4,4′-diphenyl methylene diisocyanate.
7. The product of claim 1 , wherein
(a) the polyol is selected from the group consisting of be polyethylene glycol, polycaprolactone polyol, polycyclooctene polyol, trans-1,4 butadiene polyol, and transisoprene polyol, and
(b) the isocyanate comprises 4,4′-diphenyl methylene diisocyanate.
8. The product of claim 1 , wherein the endoprosthesis further includes a radiopaque agent.
9. The product of claim 1 , wherein the endoprosthesis is biocompatible.
10. A product comprising an endoprosthesis having a body formed of a shape memory polymer including a reaction product of polyol, isocyanate, and a polyhedral oligosilsequioxane diol, wherein the endoprosthesis being designed for delivery into a body lumen.