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Proceedings Paper

Delayed tissue death probed with sunlight surgery
Author(s): Jeffrey M. Gordon; Ruthy Shaco-Levy; Daniel Feuermann; Mahmoud Huleihil; Solly Mizrahi
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Paper Abstract

We report pronounced delayed tissue death in photothermal surgery performed with highly concentrated sunlight on the livers of healthy live rats. Pathology reveals that lesion volumes increase by up to a factor of 5 within approximately 24 h after surgery, and then stabilize. Islands of viable cells can persist within damaged tissue, in the immediate vicinity of blood vessels, but also necrose within about 48 h. Delayed cell death is an unambiguously non-thermal process, apparently linked solely to biochemical messengers. The dramatic enlargement of the affected region appears to have been essentially overlooked in laser surgery studies. The ramifications include (a) proper gauging of the required scale of tissue damage during surgery, toward averting excessive destruction of untargeted surrounding tissue; and (b) avoiding false positives from the substantial amount of tissue that appears viable immediately after surgery but will necrose within 24 h. The comparable performance of high-flux solar and concentrated laser light for hyperthermic treatments permits effective surgery and the probing of tissue death dynamics with a solar energy system that is simpler and markedly less expensive than surgical lasers.

Paper Details

Date Published: 15 April 2005
PDF: 8 pages
Proc. SPIE 5695, Optical Interactions with Tissue and Cells XVI, (15 April 2005); doi: 10.1117/12.583432
Show Author Affiliations
Jeffrey M. Gordon, Ben-Gurion Univ. of the Negev (Israel)
Univ. of California/Merced (United States)
Ruthy Shaco-Levy, Soroka Medical Ctr. and Faculty of Health Sciences/Ben-Gurion Univ. of the Negev (Israel)
Daniel Feuermann, Ben-Gurion Univ. of the Negev (Israel)
Mahmoud Huleihil, Ben-Gurion Univ. of the Negev (Israel)
Solly Mizrahi, Soroka Medical Ctr. and Faculty of Health Sciences/Ben-Gurion Univ. of the Negev (Israel)

Published in SPIE Proceedings Vol. 5695:
Optical Interactions with Tissue and Cells XVI
Steven L. Jacques; William P. Roach, Editor(s)

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