Influence of fiber type and absorption media on the mechanism of endovenous laser ablationстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 23 января 2018 г.
Аннотация:Our experimental investigation was aimed at revealing the mechanism behind the action of laser radiation on venous wall under endovenous laser ablation conditions. We determined the critical laser power Pcr at which the objective effect of complete denaturation of the vascular tissue collagen was attained for two types of optical fber in the presence and absence of blood cells. We demonstrated that for the radial optical fber the presence of blood cells had no effect on the magnitude of Pcr, which came to 4.3 ± 0.1 and 5.6 ± 01 W for 1.56 and 1.47 µm lasers, respectively. For the bare fber and 1.56 µm laser, Pcr increased up to 5.2 ± 0.2 W in a blood-flled vessel and up to 7.1 ± 0.2 W when the blood was replaced by a sodium chloride solution. Our data show that the heating and degradation of insuffcient veins go on more effectively when the tissue is heated by laser radiation directly absorbed therein, rather than the red-hot carbonized optical fber tip.