Open AccessCircumferential irradiation for interstitial coagulation of urethral stricture
Author(s) -
Trung Hau Nguyen,
Yun-Hee Rhee,
JinChul Ahn,
Hyun Wook Kang
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.020829
Subject(s) - diffuser (optics) , materials science , optics , irradiation , machining , coagulation , biomedical engineering , light source , medicine , physics , psychiatry , nuclear physics , metallurgy
An optical diffuser was developed to achieve radially uniform light irradiation by micro-machining helical patterns on the fiber surface for endoscopically treating urethral stricture. Spatial emission from the diffuser was evaluated by goniometric measurements. A computational model was developed to predict spatio-temporal heat distribution during the interstitial coagulation. The fabricated diffuser yielded circumferential light distribution with slightly concentrated energy at the proximal end. Both simulation and tissue testing demonstrated approximately 1-mm coagulation thickness at 6 W for 10 sec with 1470 nm. The proposed optical diffuser may be a feasible tool to treat the urethral stricture in a uniform manner.