Stent for vessels

Details Stent for vessels Stent for vessels

A - Human Necessities

61

F

A61F 2/82 (2006.01) A61F 2/90 (2006.01) A61L 31/06 (2006.01) A61L 31/14 (2006.01)

Patent

CA 2308434

A stent for a vessel implanted in the vessel of the living body including a main body portion of the stent formed into a tube by a yarn formed of a biodegradable polymer exhibiting a shape memory function. The main body portion of the stent is shape-memorized to a size that can be inplanted in the vessel. The main body portion of the stent is implanted in the vessel of the living body as it is contracted in diameter by an external force, and is enlarged in diameter by being heated with the temperature of the living body. The main body portion of the stent is formed by winding a yarn formed of a biodegradable polymer in a tube form as the yarn is bent in a zigzag design. The main body portion of the stent is enlarged or contracted in diameter with the bends of the yarn as the displacing portions.

L'invention se rapporte à un stent conçu pour être placé dans un vaisseau d'organisme et comportant un corps formé de manière cylindrique par un fil composé d'un polymère bioabsorbable doté d'une fonction de mémoire de forme. Lorsqu'il reprend sa forme d'origine, ce stent possède une taille permettant de l'introduire dans un vaisseau. Il est conçu pour être placé dans un vaisseau d'organisme, son diamètre étant réduit par une force externe, et pour se déployer sous l'effet de la chaleur de l'organisme. On fabrique un tel stent en enroulant sous forme de cylindre un fil de polymère bioabsorbable tout en formant le même zigzag de sorte que ledit stent peut se déployer ou se rétracter au niveau de parties courbées du fil considérées comme des zones de déplacement.

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