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Proceedings Paper

Near-infrared welding of aorta and skin tissues using a Cr4+:YAG laser
Author(s): Tapan K. Gayen; Alvin Katz; Yury Budansky; Jonathan M. Evans; Shixiang Xu; Howard E. Savage; Steven A. McCormick; Robert R. Alfano
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Paper Abstract

We present a study on welding of ex vivo aorta and skin samples using a tunable Cr4+: yttrium aluminum garnet (YAG) laser to explore the wavelength dependence of the welding efficacy. Welding efficacy was monitored by measuring the tensile strength of the welded tissue and the extent of collateral tissue damage. Tensile strengths were measured using a digital force gauge. Full thickness tissue bonding was observed with both aorta and skin samples. The welding of aorta was so perfect that it was difficult to distinguish the welded sites from the non-welded sites on hematoxylin and eosin staining of the samples under optical microscope. No collateral damage of the aorta samples was observed. Scanning Electron Microscopic study of the welded samples supported the optical microscopy results. Best results for aorta and skin were achieved in the 1455-1460 nm range. The weld strength as a function of wavelength correlates with the absorption spectrum of water. Fluorescence imaging of welded aorta and skin shows no significant change in collagen and elastin signal.

Paper Details

Date Published: 17 June 2002
PDF: 3 pages
Proc. SPIE 4609, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems XII, (17 June 2002); doi: 10.1117/12.432085
Show Author Affiliations
Tapan K. Gayen
Alvin Katz
Yury Budansky
Jonathan M. Evans
Shixiang Xu
Howard E. Savage
Steven A. McCormick
Robert R. Alfano

Published in SPIE Proceedings Vol. 4609:
Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems XII
Lawrence S. Bass; Eugene A. Trowers; Kenneth Eugene Bartels; Udayan K. Shah; David S. Robinson; Lawrence S. Bass; Kenton W. Gregory; Kenneth Eugene Bartels; Lawrence S. Bass; Brian Jet-Fei Wong; Hans-Dieter Reidenbach; Lloyd P. Tate; Nikiforos Kollias; Abraham Katzir; Timothy A. Woodward; Werner T.W. de Riese; George M. Peavy; Werner T.W. de Riese; Kenton W. Gregory; Michael D. Lucroy; Abraham Katzir; Nikiforos Kollias; Michael D. Lucroy; Reza S. Malek; George M. Peavy; Hans-Dieter Reidenbach; David S. Robinson; Udayan K. Shah; Lloyd P. Tate; Eugene A. Trowers; Brian Jet-Fei Wong; Timothy A. Woodward, Editor(s)

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