Catheter with balloon folding into predetermined...

A - Human Necessities – 61 – M

Patent

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Details

A61M 29/02 (2006.01) A61M 25/10 (2006.01)

Patent

CA 2191452

A medical catheter (10) having a balloon (3) adapted to be folded into a predetermined configuration. The catheter comprises a flexible inflation member (2) with a balloon (3) disposed on the inflation member (2). The balloon has a flexible wall defining an inflation chamber and the inflation chamber is in fluid flow relation with an inflation lumen in the inflation member. The balloon (3) is adapted for inflation from a folded configuration to an inflated, expanded configuration and back to the folded configuration. An array of longitudinally and circumferentially arranged ribs (6) is disposed in said wall (3a). The ribs (6) are either more stiff or less stiff than the wall (3a) whereby upon evacuation of inflation fluid from the balloon (3) either portions of the wall between the ribs will collapse between the ribs or the ribs will collapse within the wall.

L'invention concerne un cathéter médical (10) comportant un ballonnet (3) adapté pour être replié en une configuration prédéterminée. Le cathéter comprend un élément de dilatation flexible (2) avec un ballonnet (3) placé sur l'élément de dilatation (2). Ce ballonnet comporte une paroi flexible définissant une chambre de dilatation et cette dernière communique par l'écoulement du fluide avec une lumière de dilatation dans l'élément de dilatation. Le ballonnet (3) est adapté pour se dilater à partir d'une configuration pliée en une configuration dilatée, détendue, et pour revenir ensuite à la configuration pliée. Un ensemble de nervures (6) disposées dans le sens longitudinal et circonférentiel est prévu dans cette paroi (3a). Les nervures sont plus rigides ou moins rigides que la paroi (3a), ce qui, lors de l'évacuation du fluide de dilatation du ballonnet (3), permet aux parties de la paroi entre les nervures de s'aplatir entre ces dernières, ou bien aux nervures de s'aplatir à l'intérieur de la paroi.

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