Folding spring for a catheter balloon

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/10 (2006.01)

Patent

CA 2451810

A device for folding a balloon of a balloon catheter during balloon deflation includes a band and a plurality of elongated fingers that are attached to the band. The band includes a midsection and a pair of overlaps with each overlap extending from the midsection to a respective end of the band. The band is folded into an annulus wherein the overlaps are juxtaposed and can be joined together by soldering, welding or adhesive bonding. The annulus is attached to the catheter tube of the balloon catheter with the fingers extending over the balloon in a substantially same axial direction. In operation, the fingers are moveable between an unstressed configuration, when the balloon is deflated, and a stressed configuration, when the balloon is inflated. In a stressed configuration, the fingers urge against the balloon and are biased toward the stressed configuration to return to an unstressed configuration.

L'invention concerne un dispositif pour plier un ballonnet d'un cathéter à ballonnet au cours du dégonflement du ballonnet. Ce dispositif comprend une bande et une pluralité de doigts allongés qui sont fixés à la bande. Cette bande comprend une section intermédiaire et une paire de rabats, chaque rabat s'étendant depuis la section intermédiaire vers une extrémité respective de la bande. Cette bande est pliée en un anneau, les rabats étant juxtaposés et pouvant être joints ensemble par brasage, soudage ou fixation adhésive. Cet anneau est fixé au tube de cathéter du cathéter à ballonnet, les doigts s'étendant sur le ballon dans un même sens sensiblement axial. Lors de son fonctionnement, les doigts peuvent bouger entre une configuration sans contrainte, lorsque le ballon est dégonflé, et une configuration de contrainte, lorsque le ballon est gonflé. Dans une configuration de contrainte, les doigts sont poussés contre le ballonnet et sont orientés vers la configuration de contrainte afin de retrouver une configuration sans contrainte.

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