Radiation catheter with multilayered balloon

Details Radiation catheter with multilayered balloon Radiation catheter with multilayered balloon

A - Human Necessities

61

N

A61N 5/10 (2006.01)

Patent

CA 2679433

The disclosure is directed to catheter devices and methods for controlled application of irradiation to tissue adjacent a body site, such as cavity after removal of tissue, e.g. cancer. The catheter device includes an inflatable balloon having at least two layers. The inflatable balloon has an expansion of more than 25% and less than 200% when inflated from the un-inflated condition to a turgid condition, preferably more than 50% and less than 150%. In the turgid condition the polymeric material(s) of the balloon layers are at or near the elastic limit of the balloon layer material. The balloon may contain or be formed of or be coated with radiopaque material to facilitate positional or symmetry verification.

L'invention concerne des dispositifs formant cathéter et des procédés pour une application contrôlée d'irradiation au tissu adjacent à un emplacement de corps, comme une cavité, après retrait du tissu, par exemple un cancer. Le dispositif formant cathéter comprend un ballon gonflable ayant au moins deux couches. Le ballonnet gonflable a une dilatation de plus de 25 % et de moins de 200 %, lorsque gonflé à partir de l'état non gonflé vers un état boursouflé, de préférence de plus de 50 % et de moins de 150 %. Dans l'état boursouflé, le ou les matériaux polymères des couches de ballonnet sont à ou près de la limite d'élasticité du matériau de couche de ballonnet. Le ballon peut contenir ou être constitué de ou être recouvert avec un matériau radio-opaque pour faciliter la vérification de position ou de symétrie.

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