Endoluminal coil delivery system having a mechanical release...

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/03 (2006.01) A61B 17/12 (2006.01) A61M 25/092 (2006.01)

Patent

CA 2230139

The invention provides endoluminal coil delivery systems (10) and methods for positioning a coil (13) within a body lumen (44). In particular, the device uses a mechanical latch in the form of jaws to positively engage the coil (13) during positioning. The coil may be restrained in a straight configuration from within the coil (13), using an internal coil wire (22), or from outside using a catheter. Thus, the mechanism for releasing the coil (13) to form its relaxed convoluted shape is separate from the mechanism for disengaging the coil (13) from the delivery system (10). The use of an internal core wire allows a coil having a helical outer surface to be torqued against a fallopian tube or other body lumen wall, thereby firmly anchoring the coil (13) in the target position prior to disengaging the delivery system (10).

Systèmes (10) d'installation endoluminale de serpentin et procédés de positionnement d'un serpentin (13) à l'intérieur d'une lumière (44) de l'organisme. Le dispositif fait appel en particulier à un mécanisme de prise revêtant la forme de mâchoires maintenant le serpentin (13) au cours de son positionnement. Ce serpentin peut être maintenu sous contrainte dans une configuration rectiligne depuis sa partie interne en utilisant un fil (22) interne à celui-ci ou par sa partie externe en utilisant un cathéter. Ainsi, le mécanisme de libération du serpentin (13) qui doit conférer à celui-ci sa forme en courbe et distinct du mécanisme assurant la libération du serpentin (13) de son système de positionnement (10). L'utilisation d'un fil passant par l'intérieur permet de conférer à ce serpentin présentant une face externe hélicoïdale de subir un couple de torsion le plaquant contre la paroi interne d'une trompe de fallope ou une autre lumière de l'organisme afin de l'ancrer fermement dans sa position de destination avant que le système d'installation (10) ne soit dégagé.

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