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US 9,844,612 B2Granted
Method of making a poly(L-lactide) stent with tunable degradation rate
AssigneeAbbott Cardiovascular Systems Inc.
InventorsYunbing Wang, Xiao Ma, James Oberhauser
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Abstract
Methods of treating with a biodegradable polymeric stent made from poly(L-lactide) and a low concentration of L-lactide monomer is disclosed. The concentration of L-lactide is adjusted to provide a degradation behavior that is suitable for different treatment applications including coronary, peripheral, and nasal.
Claims12
A method of making a stent for treating a diseased section of a blood vessel, comprising:
- extruding a polymer composition comprising poly(L-lactide) to form a tube;
- processing the extruded tube to increase crystallinity of the tube to between 20-50%;
- and
- laser cutting the processed tube to form a stent comprising a scaffolding, wherein the scaffolding comprises greater than 95 wt % poly(L-lactide) and between 0.05 to 0.5 wt % L-lactide monomer mixed, dispersed, or dissolved within the poly(L-lactide).
1 more element
Dependencies are inferred from the claim text.