Comparison of laser ablation using multidirectional and forward-firing fiber in human thyroid gland: experimental study.
The aim of this study is to evaluate the differences between forward-firing and multidirectional lasers and to evaluate the effects of exposure times and power on laser ablation of thyroid tissue. This is an experimental, ex vivo study. The experiments were conducted on 3 thyroid glands using 2 power levels (3 and 5 W) and exposure times (3 and 5 minutes) with forward-firing and multidirectional lasers. The length and width of the demarcated zone were measured to assess the size of thermal effect. NADPH staining was performed to determine tissue viability. Thermal transformation caused by the forward-firing laser produced oval necrotic zones, whereas thermal transformation caused by the multidirectional-firing laser produced clear round necrotic zones, which clearly demarcated in both hematoxylin and eosin staining and NADH staining.
Department of Surgery, School of Medicine, Kyungpook National University, Daegu, Korea.
Ho Yong
HY
Park
Hyang Hee
HH
Choi
Jung Ju
JJ
Lee
Seung Ook
SO
Hwang
Jin Hyang
JH
Jung
Ik-Bu
IB
Sohn
Ho
H
Lee
Wan Wook
WW
Kim
D004867:Equipment Design; D006801:Humans; D053685:Laser Therapy / Q000295:instrumentation*; D008954:Models, Biological; D013961:Thyroid Gland / Q000601:surgery*
forward-firing fiber; laser ablation; multidirectional fiber; thyroid gland