Self-expanding defect closure device

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/00 (2006.01)

Patent

CA 2341906

The present invention relates to a self-expanding device for sealing a defect in a wall, such as a septal defect. The device of the present invention has a helical shaped periphery formed from an elastic wire and at least one eyelet. The eyelet has a non-circular ("asymmetric") shape which allows the eyelet to slide along a guiding mandrel. The non- circular shaped eyelet and mandrel prevent rotation of the eyelet relative to the mandrel thereby ensuring a consistent deployed shape. The present invention also incorporates a self-articulating catheter tip which can be bent to a variety of angles to enhance the ease of delivery. The tip is articulated by varying the position of the closure device within the articulated portion of the catheter.

L'invention concerne un dispositif de fermeture à auto-expansion destiné à obturer un trou septal dans une paroi. Ce dispositif adopte une forme périphérique hélicoïdale définie par un câble élastique et au moins un oeillet dont la forme non circulaire ("asymétrique") lui permet de glisser le long d'un mandrin de guidage. La forme non circulaire de l'oeillet et la nature du mandrin empêchent la rotation de l'oeillet par rapport au mandrin, assurant ainsi une forme déployée stable. L'invention concerne aussi un bout de cathéter auto-articulé qui peut fléchir et former des angles différents pour améliorer la distribution. On articule le bout en modifiant la position du dispositif d'obturation dans la partie articulée du cathéter.

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