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Silver halide fiber optic radiometric temperature measurement and control of CO 2 laser‐irradiated tissues and application to tissue welding
Author(s) -
Shenfeld Ofer,
Ophir Eyal,
Goldwasser Benad,
Katzir Abraham
Publication year - 1994
Publication title -
lasers in surgery and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 112
eISSN - 1096-9101
pISSN - 0196-8092
DOI - 10.1002/lsm.1900140405
Subject(s) - irradiation , laser , optical fiber , materials science , radiometer , optics , radiation , temperature measurement , radiometry , laser beam welding , welding , temperature control , biomedical engineering , optoelectronics , analytical chemistry (journal) , chemistry , composite material , chromatography , medicine , physics , quantum mechanics , nuclear physics , control engineering , engineering
Tissue heating by laser irradiation has attained importance in many clinical applications. Accurate temperature measurements of laser‐irradiated tissues are difficult to achieve, and experiments have produced conflicting results. Fiber optic radiometry allows temperature measurement of laser‐irradiated tissues by remote sensing of the emitted infra red (IR) radiation. We have developed an IR fiber optic radiometer capable of accurate tissue temperature measurements (± 0.2°C) and utilized it to monitor and control the heating of tissues by CO 2 laser irradiation. Tissue temperature control of ± 2.5°C was achieved. This system was used to control tissue temperature during CO 2 laser‐assisted welding of urinary bladders in rats. The strength of the welds was recorded for different welding temperatures. A temperature of 55°C was found to be optimal. © 1994 Wiley‐Liss, Inc.