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Bioabsorbable Polymeric Compositions and Medical Devices
专利权人:
OrbusNeich Medical; Inc.
发明人:
Robert J. Cottone
申请号:
US13660883
公开号:
US20130289220A1
申请日:
2012.10.25
申请国别(地区):
US
年份:
2013
代理人:
摘要:
The present invention comprises a stent comprising a blend formed from a polymer. The polymer comprises poly-L-lactide, poly-D-lactide or mixtures thereof and a copolymer moiety comprising poly-L-lactide or poly-D-lactide linked with ε-caprolactone or trimethylcarbonate. The poly-L-lactide or poly-D-lactide sequence in the copolymer moiety is random with respect to the distribution of ε-caprolactone or trimethylcarbonate and the copolymer moiety molecular weight ranges from about 1.2 IV to about 4.8 IV. The meandering elements may be stretched to a modulus ranging from about 250000 PSI to about 550,000 PSI. One, two, three, n or all segments of the meandering element may have a decreased cross-sectional area and may have a wide-angle X-ray scattering (WAXS) 2θ values of ranging from about 1 to about 35 after stretching. The crystal properties of the bioabsorbable polymers may change during crimping and/or expansion allowing for improved mechanical properties such as tensile strength and slower degradation kinetics.
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