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Proceedings Paper

Dual-wavelength tissue ablation concept for laser prostatectomy with the Nd:YAG/KTP laser
Author(s): Franz R. Schmidlin M.D.; Guy P. Delacretaz; Michael Oswald M.D.; Stephane Rohner; Christoph E. Iselin M.D.; Patrice Jichlinski; Hans-Juerg Leisinger M.D.; Peter Graber M.D.
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Paper Abstract

The Nd:YAG/KTP laser offers to the surgeon two wavelengths that can be used to coagulate and vaporize. Our objective was to investigate the combined effect of both wavelengths and to determine the irradiation parameters allowing the largest lesion volume. Chicken breast was irradiated ex vivo. 1064 nm and 532 nm Nd:YAG/KTP laser irradiations were performed sequentially at different combinations with variable fluence and compared to isofluent single wavelengths 40 W irradiation. Although the mean total lesion volume showed no difference between the different wavelengths combinations a significant enhancement of the maximum lesion depth was found under combined irradiation in the 20W/20W conditions. Dual wavelengths irradiation with the Nd:YAG/KTP laser thus induces a specific denaturation process which is more directional and results in an increased total lesion depth. This may represent a ne approach to increase the depth of coagulation necrosis and thus the total lesion volume, thereby improving long term results.

Paper Details

Date Published: 5 December 1996
PDF: 7 pages
Proc. SPIE 2923, Laser-Tissue Interaction and Tissue Optics II, (5 December 1996); doi: 10.1117/12.260728
Show Author Affiliations
Franz R. Schmidlin M.D., Univ. Hospital of Geneva (Switzerland)
Guy P. Delacretaz, Ecole Polytechnique Federale de Lausanne (Switzerland)
Michael Oswald M.D., Univ. Hospital of Lausanne (Switzerland)
Stephane Rohner, Univ. Hospital of Geneva (Switzerland)
Christoph E. Iselin M.D., Univ. Hospital of Geneva (Switzerland)
Patrice Jichlinski, Univ. Hospital of Lausanne (Switzerland)
Hans-Juerg Leisinger M.D., Univ. Hospital of Lausanne (Switzerland)
Peter Graber M.D., Univ. Hospital of Geneva (Switzerland)

Published in SPIE Proceedings Vol. 2923:
Laser-Tissue Interaction and Tissue Optics II
Hansjoerg Albrecht; Guy P. Delacretaz; Thomas H. Meier; Rudolf W. Steiner; Lars Othar Svaasand, Editor(s)

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