Cooling therapies/device for angioplasty with restenosis

A - Human Necessities – 61 – F

Patent

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Details

A61F 7/12 (2006.01) A61B 18/02 (2006.01) A61F 7/00 (2006.01) A61B 17/22 (2006.01) A61B 18/00 (2006.01)

Patent

CA 2400753

The present invention provides an enhanced method and device to inhibit or reduce the rate of restenosis following angioplasty or stent placement. The invention involves placing a balloon tipped catheter (100) in the area treated or opened through balloon angioplasty immediately following angioplasty. The balloon, which can have a dual balloon structure, may be delivered through a guiding catheter (102) and over a guidewire already in place from a balloon angioplasty. A fluid such as a perfluorocarbon may be flowed into the balloon to freeze the tissue adjacent the balloon, this cooling being associated with reduction of restenosis. The catheter may also be used to reduce atrial fibrillation by inserting and inflating the balloon such that an exterior surface of the balloon is in contact with at least a partial circumference of the portion of the pulmonary vein adjacent the left atrium.

L'invention concerne un procédé et un dispositif améliorés destinés à inhiber ou réduire la vitesse de resténose post-angioplastie ou après la mise en place d'un extenseur. Il s'agit de mettre en place une sonde (100) à ballonnet dans la région traitée ou ouverte par le biais d'une angioplastie par ballonnet suivant immédiatement l'angioplastie. Le ballonnet, qui peut avoir une structure à deux ballonnets, peut être administré par le biais d'une sonde-guide (102) et sur un fil-guide déjà en place par une angioplastie par ballonnet. Un fluide, par exemple un perfluocarbone, peut s'écouler dans le ballonnet afin de geler le tissu jouxtant le ballonnet, ce refroidissement étant associé à la réduction de la resténose. La sonde peut également servir à réduire la fibrillation auriculaire par insertion et dilatation du ballonnet, la surface extérieure de ce dernier étant alors en contact au moins partiellement avec la périphérie de la partie de la veine pulmonaire jouxtant L'oreillette gauche.

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