Patent ID: 8828419
Filing Date: 2014-09-09
Classification: A61L,A61P,B23K

Abstract:
1. A medical device for placement in a vessel for treatment of stenosis comprising: a stent having a structure made of a first biodegradable and/or bioabsorbable material; a degradation additive encapsulated by a second biodegradable and/or bioabsorbable material forming a nanoparticle or microparticle, the nanoparticle or microparticle incorporated within the first biodegradable and/or bioabsorbable material of the structure; wherein the second biodegradable and/or bioabsorbable material of the nanoparticle or microparticle is a first, discrete physical phase that is a dispersed phase within the first biodegradable and/or bioabsorbable material of the structure of the stent; wherein the first biodegradable and/or bioabsorbable material of the structure of the stent is a second, discrete physical phase that is a continuous phase, wherein the second biodegradable and/or bioabsorbable material of the nanoparticle or microparticle has a degradation rate that is faster than a degradation rate of the first biodegradable and/or bioabsorbable material of the structure of the stent, the continuous phase of the structure of the stent experiencing a period of accelerated degradation resulting from (i) degradation of the dispersed phase of the second biodegradable and/or bioabsorbable material of the nanoparticle or microparticle, and (ii) release of the degradation additive from the nanoparticle or microparticle.