Modeling of optothermal fiber converters interaction with vein during endovenous laser coagulation

Andrey V. Belikov; Tung Do Thanh; Alexei V. Skrypnik; Yulia V. Semyashkina

doi:10.1117/12.2560917

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9 April 2020 Modeling of optothermal fiber converters interaction with vein during endovenous laser coagulation

Andrey V. Belikov, Tung Do Thanh, Alexei V. Skrypnik, Yulia V. Semyashkina

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Proceedings Volume 11457, Saratov Fall Meeting 2019: Optical and Nano-Technologies for Biology and Medicine; 114571L (2020) https://doi.org/10.1117/12.2560917
Event: Saratov Fall Meeting 2019: VII International Symposium on Optics and Biophotonics, 2019, Saratov, Russian Federation

Abstract

The possibility of endovenous laser coagulation using C-doped and Ti-doped optothermal fiber converters is discussed. Optical and thermal models have been developed to estimate the distribution of light and temperature in the vein at endovenous laser coagulation using a 980 nm diode laser. It is shown that the distribution of light in the vein when using Ti-doped converter is significantly different from the distribution obtained using C-doped converter and clear quartz fiber. As a result of the thermal calculation, for 980 nm laser power equal to 20 W, the dynamic of blood vessel wall temperature was determined. The effect of blood flow speed (1.5 mm/s) on the temperature of the vein wall was taken to account. It is shown that the blood vessel wall can be heated up to a temperature of 80 °C, which is needed for collapse of the vein, after 21 seconds of laser exposure by C-doped converter and after 43 seconds of laser exposure by Ti-doped converter at endovenous 980 nm laser coagulation of vein with a diameter 5 mm.

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Andrey V. Belikov, Tung Do Thanh, Alexei V. Skrypnik, and Yulia V. Semyashkina "Modeling of optothermal fiber converters interaction with vein during endovenous laser coagulation", Proc. SPIE 11457, Saratov Fall Meeting 2019: Optical and Nano-Technologies for Biology and Medicine, 114571L (9 April 2020); https://doi.org/10.1117/12.2560917

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