Removable core balloon on a wire

Details Removable core balloon on a wire Removable core balloon on a wire

A - Human Necessities

61

M

A61M 25/10 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2184357

A kink resistant balloon catheter for insertion into a bodily conduit. The catheter (10) includes a shaft (20), a radiopaque distal tip (35), a dilatation balloon (33) between the shaft and the distal tip, and a removable core wire (40). The shaft includes a kink resistant, cross-wound multifilar (CWMF) coil (21) enclosed by a polymeric sleeve (22) and defining a central lumen (28) for delivery of a fluid inflation medium for inflating the balloon. A fixed core wire (36) interconnects the CWMF coil and the distal tip. In a method for widening constricted bodily passages using the novel balloon catheter, the removable core wire is inserted to assist positioning of the catheter, and is removed to permit rapid inflation and deflation of the balloon.

La présente invention concerne un cathéter à ballonnet résistant au vrillage destiné à l'introduction dans un conduit corporel. Ce cathéter (10) se compose d'un tube creux (20), d'une extrémité distale (35) radio-opaque, d'un ballonnet de dilatation (33) placé entre le tube creux et l'extrémité distale, et enfin d'un fil central (40) amovible. Le tube creux, constitué d'un enroulement multifilaire (21) à croisure va-et-vient gainé d'un manchon polymère (22), définit une lumière (28) permettant l'admission du fluide de gonflage destiné au ballonnet. Un fil central fixe (36) relie à l'extrémité distale l'enroulement multifilaire à croisure va-et-vient. L'un des procédés d'élargissement des passages corporels au moyen du nouveau cathéter à ballonnet consiste à insérer le fil central amovible pour aider à positionner le cathéter puis à retirer ce fil pour permettre les gonflage et dégonflage rapides du ballonnet.

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