Leonid Vitalyevich Gluschenko,Artur Evgenyevich Krupnin,Nikita Gennadyevich Sedush,Vladislav Aleksandrovich Shchepochkin
申请号：
US16616423
公开号：
US20200253760A1
申请日:
2018.07.17
申请国别(地区):
US
年份:
2020
代理人:
摘要：
Biodegradable self-expanding polymer stent has an outer diameter of 0.25-40 mm, length of 5-250 mm, and closed-cell wall structure formed by struts, where ratio of inner diameter values before crimping and after crimping is in a range of 3 to 5, and made of a copolymer obtained from L-lactide, D-lactide, D,L-lactide, meso-lactide, glycolide, ε-caprolactone, trimethylene carbonate, p-dioxanone and compounds comprising functional groups capable of photopolymerization； supramolecular structure of the copolymer is oriented substantially circularly in a transversal cross section of the stent. Method of manufacturing includes extruding a tube of a polymer material； annealing the extruded polymer tube； laser cutting the extruded polymer tube to form a stent workpiece； heating the stent to above glass transition temperature of the polymer, crimping the stent workpiece uniformly over the entire outer surface thereof, and quenching at about minus 20 degrees Celsius； placing the quenched stent on a delivery means.
