Stent delivery system allowing controlled release of a stent

A - Human Necessities – 61 – F

Patent

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A61F 2/06 (2006.01)

Patent

CA 2574112

A stent delivery system includes a stept having at least one eyelet and at feast one rivet and a holder supporting the stept, wherein the holder includes a first section having a first diameter and a second section having a second diameter. A sheath covers the stept and the holder. The rivets are attached to each of the eyelets. A first inner diameter of the stent at the position of the rivets is smaller than a second inner diameter of the stept at other positions because the rivets protrude inwardly. A shoulder is formed on the holder due to the difference between the first diameter and the second diameter of the holder. The shoulder is positioned distally adjacent the rivets. The shoulder interferes with the protruding rivets, thereby restraining the longitudinalmovement of the stept relative to the holder. Although the sheathis pulled back, the stem does not jump out of the stem delivery system. As a result, the stem delivery system allows the stem to be released in a controlled manner upon its deployment.

Un système de livraison de stent comprend un stent ayant au moins un AEillet et au moins un rivet et un support soutenant le stent ; le support comprend une première section d'un premier diamètre et une deuxième section d'un deuxième diamètre. Une gaine recouvre le stent et le support. Les rivets sont fixés à chacun des AEillets. Un premier diamètre interne du stent à la position des rivets est inférieur à un deuxième diamètre interne du stent à d'autres positions car les rivets dépassent vers l'intérieur. Un bord est formé sur le support du fait de la différence entre le premier diamètre et le deuxième diamètre du support. Le bord est placé en position adjacente des rivets au plan distal. Le bord interfère avec les rivets qui dépassent, ce qui limite le mouvement longitudinal du stent relativement au support. Même si la gaine est retirée, le bâton ne sort pas du système de distribution. En conséquence, le système de distribution de bâton permet de libérer le bâton de manière contrôlée en cas de déploiement.

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