BIOABSORBABLE POLYMERIC COMPOSITION FOR A MEDICAL DEVICE
A biodegradable and biocompatible nontoxic polymeric composition is provide which includes a base material such as a crystallizable polymer, copolymer, or terpolymer, and a copolymer or terpolymer additive. Medical devices manufactured from the composition are also provided.
1 . A bioabsorbable stent comprising a crystallizable polymer composition, the polymer composition comprising, a poly (L-lactide) moiety, and/or a poly (D-lactide) moiety, and/or poly L-lactide-co-PEG moiety, and/or poly D-lactide-co-PEG moiety, linked or admixed with poly (L-lactide-co-Tri-methylene-carbonate) or poly (D-lactide-co-tri-methylene-carbonate) or poly (L-lactide-co-ε-caprolactone) or poly (D-lactide-co-ε-caprolactone) in the form of block copolymers or blocky random copolymers.
2 . The stent of claim 1 , wherein the polymer composition comprises poly (L-lactide), linked or admixed with poly (L-lactide-co-ε-caprolactone) in the form of block copolymers or blocky random copolymers.
3 . The stent of claim 1 , wherein the polymer composition is crystallized due to strain upon expansion of the stent.
4 . The stent of claim 1 , wherein the stent is balloon-expandable.
5 . The stent of claim 1 , wherein the stent comprises a hoop structure.
6 . The stent of claim 1 , further comprising at least one radiopaque marker.
7 . The stent of claim 1 , further including at least one pharmaceutical agent.
8 . The stent of claim 1 further including a barrier layer which contains at least one pharmaceutical agent.