Near-infrared selective photothermolysis for vascular targets

A - Human Necessities – 61 – N

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A61N 5/06 (2006.01) A61B 18/20 (2006.01) A61B 18/22 (2006.01) A61N 5/067 (2006.01)

Patent

CA 2206039

Near-infrared selective photothermolysis for the treatment of ectatic blood vessels, for example, blood vessels of a portwine stain birthmark, leg veins, or vessels contributing to psoriasis. This technique is especially applicable to deeper lying blood vessels in view of the better penetration of the near- infrared light. Consequently, vessels below a dermal/epidermal boundary can be reached. Near-infrared is defined as a range of approximately 700 to 1,200 nm. The optimal colors are near 760 or between 980 to 990 nm for most populations.

On utilise la photothermolyse sélective dans le proche infrarouge pour traiter des vaisseaux sanguins ectasiques, par exemple ceux d'une tâche de vin de naissance, les veines des jambes, ou des vaisseaux contribuant à un psoriasis. Cette technique s'applique spécialement aux vaisseaux sanguins assez profonds, vu la meilleure pénétration du rayonnement dans le proche infrarouge, et on peut donc atteindre des vaisseaux situés sous la limite séparant le derme et l'épiderme. On définit le proche infrarouge comme une fourchette d'environ 700 à 1200 nm. Les couleurs optimales se trouvent près de 760 ou entre 980 et 990 nm pour la plupart des populations.

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