Endovenous closure of varicose veins with mid infrared laser

A - Human Necessities – 61 – B

Patent

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A61B 18/24 (2006.01) A61B 17/00 (2006.01) A61B 18/00 (2006.01) A61B 18/22 (2006.01) A61B 19/00 (2006.01)

Patent

CA 2503880

This invention is an improved method and device for treating varicose veins 200 or the greater saphenous vein 202. The method comprises the use of infrared laser radiation in the region of 1.2 to 1.8 um in a manner from inside the vessel 200 or 202 such that the endothelial cells of the vessel wall 704 are damaged and collagen fibers in the vessel wall 704 are heated to the point where they permanently contract, the vessel 200 or 202 is occluded and ultimately resorbed . The device includes a laser 102 delivered via a fiber optic catheter 300 that may have frosted or diffusing fiber tips 308. A motorized pull back device 104 is used, and a thermal sensor 600 may be used to help control the power required to maintain the proper treatment temperature.

L'invention concerne une méthode et un dispositif améliorés de traitement de veines variqueuses (200) ou de la veine grande saphène (202). Ladite méthode consiste à utiliser un rayonnement laser infrarouge dans la région comprise entre 1,2 et 1,8 um depuis l'intérieur du vaisseau (200) ou (202), d'une manière telle que les cellules endothéliales de la paroi du vaisseau (704) sont endommagées et les fibres de collagène de la paroi du vaisseau (704) sont chauffées jusqu'au point où elles se contractent de manière permanente, le vaisseau (200) ou (202) est occlus et finalement résorbé. Le dispositif comprend un laser (102) fourni par un cathéter à fibres optiques (300) qui peut présenter des pointes (308) de fibres glacées ou diffusantes. Un dispositif de retour motorisé (104) est utilisé, et un capteur thermique (600) peut être utilisé pour aider à réguler la puissance requise pour maintenir la température de traitement appropriée.

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