Abstract
Using quartz fiber with titanium-containing optothermal fiber converter (TOTFC) is promising in endovenous laser coagulation (EVLA) for the treatment of varicose veins. This study aims to research the variation in the optical properties of TOTFC as its microstructure changes under the condition that TiO2 spheres inside converter are arranged in such a way that the Mie theory approximation can be applied. The absorbance efficiency of laser energy with 980 nm and 1470 nm wavelengths for TOTFC has been calculated. Optical multidimensional simulation for the EVLA process was developed and calculated. The optimal ranges of microstructure’s parameters for TOTFC in the EVLA process were discussed.
Highlights
Optothermal fiber converter (OTFC) generated on the distal end of the quartz fiber combined with a laser source has shown advantages for medical surgeries [1]
The aim of this study is to find out and evaluate the dependence of titaniumcontaining optothermal fiber converter (TOTFC)'s optical parameters and light absorbance efficiency at 980 nm and 1470 nm wavelengths on microstructure of converter when the distribution of the TiO2 spheres inside the converter allows one to apply an approximation of the Mie theory, evaluate the possibility to appear of radiation on the inner vessel wall surface for these two wavelengths in the endovasal laser coagulation (EVLA) procedure and determine the possible optimal for EVLA at 980 nm and 1470 nm wavelengths the parameters of microstructures of TOTFC
The change of the microstructure in TOTFC as the volume fraction k of TiO2 shown in Eq (1) will significantly change the optical properties of TOTFC
Summary
Optothermal fiber converter (OTFC) generated on the distal end of the quartz fiber combined with a laser source has shown advantages for medical surgeries [1]. The use of such converters makes it possible to efficiently process (coagulate, cut, evaporate, etc.) soft biological tissues at different laser wavelengths of laser radiation [2]. Researchers have confirmed the OTFC is highly effective in the treatment of soft tissue [3, 4] One of their recent prospects is used in the treatment of varicose veins by endovasal laser coagulation (EVLA) method. One promising solution to overcome is to use the OTFC on the distal end of optical fiber
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