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Proceedings Paper

Heat management prevents tissue buckling and collateral damage in NIR-laser welding
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Paper Abstract

In this study, a NIR erbium fiber laser tuned to a water vibrational overtone absorption band at 1455 nm was used to weld directly, in vitro, seventy-six porcine aorta tissues without the need for extrinsic solder materials. The tissues were divided into eleven groups based on the multiple and variable parameters that were used to weld the tissues. The effectiveness of the parameters used in each of the weld groups was evaluated directly at the time of the weld and also by tensile strength measurements done at the termination of the weld. Management of heat produced in tissues is of critical importance for good laser tissue welding (LTW). To address heat management issues, we report LTW using a transparent cover over the tissue specimen as a heat sink. Multiple scanning helps distribute the laser-generated heat and allows the tissue to cool between scans, reducing thermal damage. Better heat management using a transparent cover slide enhances the welding success. It reduces collateral damage and limits water evaporation and control the buckling of tissue around the line of apposition so that the two pieces that are welded do not move apart along the line of apposition due to buckling pressure and ensure a full-length weld.

Paper Details

Date Published: 22 February 2006
PDF: 4 pages
Proc. SPIE 6078, Photonic Therapeutics and Diagnostics II, 60780Y (22 February 2006); doi: 10.1117/12.649830
Show Author Affiliations
Vidyasagar Sriramoju, City College/CUNY (United States)
Howard E. Savage, New York Eye and Ear Infirmary (United States)
Rabindra Halder, City College/CUNY (United States)
Richard B. Rosen, New York Eye and Ear Infirmary (United States)
A. Katz, City College/CUNY (United States)
R. R. Alfano, City College/CUNY (United States)
Alfanix Technology Ltd. (United States)


Published in SPIE Proceedings Vol. 6078:
Photonic Therapeutics and Diagnostics II
Kenton W. Gregory; Nikiforos Kollias; Reza S. Malek; Michael D. Lucroy; Henry Hirschberg; Brian Jet-Fei Wong; Eugene A. Trowers; Werner T.W. de Riese; Justus F. R. Ilgner; Steen J. Madsen; Lloyd P. Tate; Haishan Zeng; Guillermo J. Tearney; Bernard Choi, Editor(s)

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