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Proceedings Paper

Subsurface optical stimulation of the rat prostate nerves using continuous-wave near-infrared laser radiation
Author(s): Serhat Tozburun; Gwen A. Lagoda; Arthur L. Burnett; Nathaniel M. Fried
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Paper Abstract

Successful identification and preservation of the cavernous nerves (CN), which are responsible for sexual function, during prostate cancer surgery, will require subsurface detection of the CN beneath a thin fascia layer. This study explores optical nerve stimulation (ONS) in the rat with a fascia layer placed over the CN. Two near-IR diode lasers (1455 nm and 1550 nm lasers) were used to stimulate the CN in CW mode with a 1-mm-diameter spot in 8 rats. The 1455 nm wavelength provides an optical penetration depth (OPD) of ~350 μm, while 1550 nm provides an OPD of ~1000 μm (~3 times deeper than 1455 nm and 1870 nm wavelengths previously tested). Fascia layers with thicknesses of 85 - 600 μm were placed over the CN. Successful ONS was confirmed by an intracavernous pressure (ICP) response in the rat penis at 1455 nm through fascia 110 μm thick and at 1550 nm through fascia 450 μm thick. Higher incident laser power was necessary and weaker and slower ICP responses were observed as fascia thickness was increased. Subsurface ONS of the rat CN at a depth of 450 μm using a 1550 nm laser is feasible.

Paper Details

Date Published: 9 February 2012
PDF: 6 pages
Proc. SPIE 8207, Photonic Therapeutics and Diagnostics VIII, 82070Y (9 February 2012); doi: 10.1117/12.905256
Show Author Affiliations
Serhat Tozburun, The Univ. of North Carolina at Charlotte (United States)
Gwen A. Lagoda, The Johns Hopkins Univ. (United States)
Arthur L. Burnett, The Johns Hopkins Univ. (United States)
Nathaniel M. Fried, The Univ. of North Carolina at Charlotte (United States)
The Johns Hopkins Univ. (United States)


Published in SPIE Proceedings Vol. 8207:
Photonic Therapeutics and Diagnostics VIII
Anita Mahadevan-Jansen; Andreas Mandelis; Kenton W. Gregory; Nikiforos Kollias; Hyun Wook Kang; Henry Hirschberg; Melissa J. Suter; Brian Jet-Fei Wong; Justus F. Ilgner; Stephen Lam; Bodo E. Knudsen; Steen Madsen; E. Duco Jansen; Bernard Choi; Guillermo J. Tearney; Laura Marcu; Haishan Zeng; Matthew Brenner; Krzysztof Izdebski, Editor(s)

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