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Proceedings Paper

Comparison of Ho:YAG, Tm:YAG, and argon lasers for fusion of intestinal tissues
Author(s): John Anthony Pearce; Inci F. Cilesiz; Ashley J. Welch; Eric K. Chan; Tom J. McMurray; Sharon L. Thomsen M.D.
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Paper Abstract

Numerical modeling and experimental verification studies were conducted to compare continuous wave Ar, Tm:YAG, and Ho:YAG fusion characteristics in rat intestinal tissues. Spot sizes, powers, and activation times were varied according to laser characteristics. Exposed transected bowel wall was apposed and irradiated to obtain fusion in vivo. Tissue surface temperature distributions were measured with a thermal camera in the 8 to 12 micrometers band for calibration of the numerical models. The lasers were operated at fixed power, duration, and spot size. Experimental results were analyzed histologically to determine the extent of changes in submucosal collagen as indicated by birefringence loss. Modeling studies based on damage kinetics were conducted for the Tm:YAG and Ho:YAG experiments to study the microscale thermal and damage accumulation phenomena. Comparisons between predicted and measured damage boundaries showed favorable agreement.

Paper Details

Date Published: 7 September 1994
PDF: 10 pages
Proc. SPIE 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV, (7 September 1994); doi: 10.1117/12.184938
Show Author Affiliations
John Anthony Pearce, Univ. of Texas/Austin (United States)
Inci F. Cilesiz, Univ. of Texas/Austin (Turkey)
Ashley J. Welch, Univ. of Texas/Austin (United States)
Eric K. Chan, Univ. of Texas/Austin (United States)
Tom J. McMurray, Univ. of Texas/Austin (United States)
Sharon L. Thomsen M.D., Univ. of Texas M.D. Anderson Cancer Ctr. (United States)

Published in SPIE Proceedings Vol. 2128:
Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV
R. Rox Anderson M.D.; R. Rox Anderson M.D., Editor(s)

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