Polymeric endoprostheses with modified erosion rates and methods of manufacture

Abstract From the Canadian patent

An erodible prosthesis comprising alternate rates of erosion is disclosed wherein said alternate rates of erosion can be selectively initiated. Some embodiments according to the invention may comprise an agent for initiating an alternative rate of erosion, such as, for example a sensitizer, dissolution , inhibitor, photo-acid generator biochemically active additive, thermally activated catalyst, light activated catalyst electromagnetic radiation , activated catalyst hydration activated catalyst, pH activated catalyst low , melting agent, and/or enzyme activated catalyst. One or more of the foregoing agents may be dispersed within one or more layers.