Ms. Piper C. M. Williams Profile

Piper C. M. Williams

at USUHS

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Proceedings Article | 13 July 2004 Paper

Comparison of experimental models for predicting laser-tissue interaction from 3.8-micron lasers

Piper Williams, Golda Winston, Don Randolph, Thomas Neal, Thomas Eurell, Thomas Johnson

Proceedings Volume 5312, (2004) https://doi.org/10.1117/12.528543

KEYWORDS: Skin, In vitro testing, Tissues, Laser tissue interaction, In vivo imaging, Biopsy, Health sciences, Visualization, Connective tissue, Pulsed laser operation

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The purpose of this study was to evaluate the laser-tissue interactions of engineered human skin and in-vivo pig skin following exposure to a single 3.8 micron laser light pulse. The goal of the study was to determine if these tissues shared common histologic features following laser exposure that might prove useful in developing in-vitro and in-vivo experimental models to predict the bioeffects of human laser exposure. The minimum exposure required to produce gross morphologic changes following a four microsecond, pulsed skin exposure for both models was determined. Histology was used to compare the cellular responses of the experimental models following laser exposure. Eighteen engineered skin equivalents (in-vitro model), were exposed to 3.8 micron laser light and the tissue responses compared to equivalent exposures made on five Yorkshire pigs (in-vivo model). Representative biopsies of pig skin were taken for histologic evaluation from various body locations immediately, one hour, and 24 hours following exposure. The pattern of epithelial changes seen following in-vitro laser exposure of the engineered human skin and in-vivo exposure of pig skin indicated a common histologic response for this particular combination of laser parameters.

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