| abstract |
PROBLEM TO BE SOLVED: To provide a biodegradable and absorbable shape memory stent which can be easily inserted and fixed into a blood vessel or the like and does not adversely affect a living body as a residual foreign substance. SOLUTION: A stent S_1 composed of a lactic acid-based polymer thread 1 having an essentially linear shape (or a small-diameter coil shape), and storing a predetermined stent shape (or a large-diameter coil shape) so that the temperature is equal to or higher than a predetermined temperature. The present invention can restore the stored predetermined stent shape (or large-diameter coil shape) without applying an external force when heated. |