Intravascular balloon catheter for embolic coil delivery

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/12 (2006.01) A61B 17/00 (2006.01) A61B 17/22 (2006.01)

Patent

CA 2427974

Improved intravascular balloon catheters for the delivery of embolic agents and devices such as coils to wide-neck aneurysms. In one embodiment, the present invention provides a balloon catheter having a combined guide wire/delivery lumen and a lateral delivery hole. The balloon may comprise a multi-lobed design with the delivery hole disposed between adjacent balloon lobes. The balloon catheter preferably includes a diversion member disposed in the combined lumen to cause the embolic device to divert from the combined lumen, through the delivery hole, and into the wide-neck aneurysm. In another embodiment, the present invention provides a balloon catheter having a shaft including a shaft tube and a co-extending embolic delivery tube. The delivery tube terminates proximal of the distal end of the shaft tube for added flexibility, and the balloon may inflate eccentrically to push the distal opening of the delivery lumen adjacent the opening of the wide-neck aneurysm.

L'invention concerne des cathéters à ballonnet intravasculaires améliorés pour l'apport d'agents et de dispositifs emboliques tels que des enroulements dans des anévrismes à col large. Dans une forme de réalisation, l'invention concerne un cathéter à ballonnet qui présente un fil-guide/lumière d'apport combinés ainsi qu'un orifice d'apport latéral. Le ballonnet peut comporter de multiples lobes, le trou d'apport se situant entre des lobes de ballonnet adjacents. Le cathéter à ballonnet comprend de préférence un élément de détournement placé dans la lumière combinée, qui sert à détourner le dispositif embolique de la lumière combinée par l'orifice d'apport et dans l'anévrisme à col large. Dans une autre forme de réalisation, l'invention concerne un cathéter à ballonnet comportant une tige incluant un tube de tige et un tube d'apport embolique coaxial. Le tube d'apport se termine à proximité de l'extrémité distale du tube de tige pour plus de flexibilité, et le ballonnet peut se gonfler de manière excentrée afin de pousser l'ouverture distale de la lumière d'apport de façon adjacente à l'ouverture de l'anévrisme à col large.

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