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Proceedings Paper

Near-infrared laser welding of aortic and skin tissues and microscopic investigation of welding efficacy
Author(s): Tapan K. Gayen; Alvin Katz; Howard E. Savage; John Lee; M. Paul; Rabindra K. Halder; Steven A. McCormick; Robert R. Alfano
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Paper Abstract

Ex vivo specimens of human and porcine aorta and skin were welded using either Cr4+:YAG or Erbium fiber lasers tuned to the water absorption band at 1440-1460 nm. Welding was performed without the use of protein solders or glues. Welding efficacy was monitored by measuring the tensile strength of the welded tissue and the extent of collateral tissue damage. Full thickness tissue bonding with no collateral damage was observed with porcine aorta samples. The optimum tensile strength for porcine and human aorta was 1.33 ± 0.15 kg/cm2 and 1.13 ± 0.27 kg/cm2 respectively for welding at 1460 nm, while that for porcine and human skin was 0.94 ± 0.15 kg/cm2 and 1.05 ± 0.19 kg/cm2 respectively achieved with welding at 1455 nm. The weld strength as a function of laser wavelength demonstrated a correlation with the absorption spectrum of native water suggests that absorption of light by water in the tissue plays a significant role in laser tissue welding.

Paper Details

Date Published: 12 September 2003
PDF: 4 pages
Proc. SPIE 4949, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems XIII, (12 September 2003); doi: 10.1117/12.476392
Show Author Affiliations
Tapan K. Gayen, Institute for Ultrafast Spectroscopy and Lasers, City College of New York (United States)
Alvin Katz, Institute for Ultrafast Spectroscopy and Lasers, City College of New York (United States)
Howard E. Savage, New York Eye and Ear Infirmary (United States)
John Lee, City College of New York (United States)
M. Paul, Institute for Ultrafast Spectroscopy and Lasers, City College of New York (United States)
Rabindra K. Halder, Institute for Ultrafast Spectroscopy and Lasers, City College of New York (United States)
Steven A. McCormick, New York Eye and Ear Infirmary (United States)
Robert R. Alfano, Institute for Ultrafast Spectroscopy and Lasers, City College of New York (United States)


Published in SPIE Proceedings Vol. 4949:
Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems XIII
Eugene A. Trowers; Timothy A. Woodward; Werner T.W. de Riese; Lawrence S. Bass; Nikiforos Kollias; Udayan K. Shah; Brian Jet-Fei Wong; Reza S. Malek; David S. Robinson; Hans-Dieter Reidenbach; Keith D. Paulsen; Kenton W. Gregory; Lawrence S. Bass; Abraham Katzir, Editor(s)

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