A Lauto1, I Kerman, M Ohebshalon, D Felsen, D P Poppas. 1. Center for Pediatric Urology and Minimal Invasive Urologic Surgery, Department of Urology, New York Presbyterian Hospital-Weill Medical College of Cornell University, New York, New York 10021, USA. pisani@hotmail.com
Abstract
BACKGROUND AND OBJECTIVES: A two-layer solder was developed to weld at low laser intensity and to provide a new method of measuring solder-tissue temperature. STUDY DESIGN/ MATERIALS AND METHODS: A film solder consisted of a white layer (bovine serum albumin (BSA) and distilled water) and a black layer (BSA, carbon black (CB), and distilled water). This two-layer solder was used with a diode laser to weld sections of dog small intestine (lambda = 810 nm, power = 200 +/- 20 mW, radiation dose = 18 +/- 1 J/mg). Sections of intestine were welded only with one-layer black solders as control group. The temperature difference between the external solder surface and the tissue-solder interface was evaluated during welding. RESULTS: The two-layer solder performed welds as strong as the one-layer solder ( approximately 0.12 N) but with less laser intensity on the black layer. The temperature difference between the external surface of the solder and the solder-tissue interface was significantly less for the two-layer solder than for the one-layer solder ( approximately 6 degrees C and approximately 15 degrees C, respectively; P < 0.05). CONCLUSIONS: The two-layer solder appeared to be more efficient at soldering biomaterials than the one-layer solder. Furthermore, the heat diffusion from the black midplane of the two-layer solder decreased the difference in temperature recorded on the solder external surface and on the solder-tissue interface. Copyright 1999 Wiley-Liss, Inc.
BACKGROUND AND OBJECTIVES: A two-layer solder was developed to weld at low laser intensity and to provide a new method of measuring solder-tissue temperature. STUDY DESIGN/ MATERIALS AND METHODS: A film solder consisted of a white layer (bovineserum albumin (BSA) and distilled water) and a black layer (BSA, carbon black (CB), and distilled water). This two-layer solder was used with a diode laser to weld sections of dog small intestine (lambda = 810 nm, power = 200 +/- 20 mW, radiation dose = 18 +/- 1 J/mg). Sections of intestine were welded only with one-layer black solders as control group. The temperature difference between the external solder surface and the tissue-solder interface was evaluated during welding. RESULTS: The two-layer solder performed welds as strong as the one-layer solder ( approximately 0.12 N) but with less laser intensity on the black layer. The temperature difference between the external surface of the solder and the solder-tissue interface was significantly less for the two-layer solder than for the one-layer solder ( approximately 6 degrees C and approximately 15 degrees C, respectively; P < 0.05). CONCLUSIONS: The two-layer solder appeared to be more efficient at soldering biomaterials than the one-layer solder. Furthermore, the heat diffusion from the black midplane of the two-layer solder decreased the difference in temperature recorded on the solder external surface and on the solder-tissue interface. Copyright 1999 Wiley-Liss, Inc.
Authors: Dara R Pabittei; Michal Heger; Johan F Beek; Sjoerd van Tuijl; Marc Simonet; Allard C van der Wal; Bas A de Mol; Ron Balm Journal: Ann Biomed Eng Date: 2010-09-11 Impact factor: 3.934