Temperature measurements during laser skin welding

Nathaniel M. Fried, Bernard Choi, Ashley J. Welch, Joseph T. Walsh

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

A thermal camera was used to measure surface temperatures during laser skin welding to provide feedback for optimization of the laser parameters. Two-cm-long, full-thickness incisions were made in guinea pig skin. India ink was used as an absorber. Continuous-wave, 1.06-μm, Nd:YAG laser radiation was scanned over the incisions, producing a pulse duration of approximately 100 ms. Cooling durations between scans of 1.6, 4.0, and 8.0 s were studied with total operation times of 3, 5, and 10 min, respectively. A laser spot diameter of 5 mm was used with the power constant at 10 W. Thermal images were obtained at 30 frames per second with a thermal camera detecting 3-5 μm radiation. Surface temperatures were recorded at 0, 1, and 6 mm from the center line of the incision. Cooling durations between scans of 1.6 s and 4.0 s in vitro resulted in temperatures at the weld site remaining above approximately 65 °C for prolonged periods of time. Cooling durations between scans as long as 8.0 s were sufficient both in vitro and in vivo to prevent a significant rise in baseline temperatures at the weld site over time.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages120-127
Number of pages8
Volume3590
StatePublished - 1999
EventProceedings of the 1999 Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems IX - San Jose, CA, USA
Duration: Jan 23 1999Jan 24 1999

Other

OtherProceedings of the 1999 Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems IX
CitySan Jose, CA, USA
Period1/23/991/24/99

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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    Fried, N. M., Choi, B., Welch, A. J., & Walsh, J. T. (1999). Temperature measurements during laser skin welding. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3590, pp. 120-127). Society of Photo-Optical Instrumentation Engineers.