Internal restraint for delivery of self-expanding stents

Details Internal restraint for delivery of self-expanding stents Internal restraint for delivery of self-expanding stents

A - Human Necessities

61

F

A61F 2/06 (2006.01)

Patent

CA 2457246

A medical device delivery system comprises a catheter having a catheter shaft with a proximal region and a distal region. The catheter shaft has a pull wire lumen therein. An expandable medical device is disposed about medical device receiving region of the catheter shaft. The expandable medical device has a reduced configuration and an expanded configuration. The system further comprises a retractable retaining wire, at least a portion of which is coiled about the expandable medical device and retains the expandable medical device in the reduced configuration. One end of the retractable retaining wire terminates in a pull-wire. The pull-wire extends into the pull-wire lumen to the proximal region of the catheter shaft.

L'invention concerne un système de pose d'un instrument médical, qui comprend un cathéter muni d'une tige de cathéter présentant une zone proximale et une zone distale. L'intérieur de la tige de cathéter présente une lumière à fil de traction. Un instrument médical extensible est disposé autour d'une zone de la tige de cathéter recevant l'instrument médical. L'instrument médical extensible présente une configuration rentrée et une configuration sortie. Le système comprend un fil rétenteur escamotable, dont au moins une partie est enroulée autour de l'instrument médical extensible et le maintient dans la configuration rentrée. Une des extrémités du fil rétenteur escamotable se termine en fil de traction. Le fil de traction s'étend à l'intérieur de la lumière à fil de traction vers la zone proximale de la tige de cathéter.

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