Thermal response of target tissues to laser irradiation. An optical and thermal model applied to vein wall

Sourcerecord Id Scopus 2375 Endovenous laser treatment for great saphenous vein appears to be an useful alternative to conventional surgery in treatment of advanced varicose veins, in ambulatory regimen too. A recurring problem in laser applications is estimating the thermal response of target tissues to laser irradiation. This typically involves using an optical model to determine the distribution of absorbed laser energy and then using a thermal model to establish the temperature during and after laser irradiation. In the present work we have calculated the power irradiation of the walls of vessel, hypothesising a diameter of the vein cm 0.8-1.5, a length cm 70-90 and haematic flow equal zero. We used Lambert-Beer law, assuming a cylindrical symmetry in the incoming intensity irradiation (I-o), as in the case in the TEM00 mode. Omitting details we calculated a power irradiation, depending on the vein diameter, of 10-20 watt using diode laser 980 nm. This study offers high importance data in order to foresee the effective transfer of thermal damage to the vein wall through absorption of laser energy.http://apps.webofknowledge.com/full_record.do?product=UA&search_mode=GeneralSearch&qid=1&SID=Q1i@gpCm9b3mdEmO@n6&page=2&doc=14