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Proceedings Paper

Tissue effects of Ho:YAG laser with varying fluences and pulse widths
Author(s): Sandor G. Vari; Maurits J. van der Veen; Vani R. Pergadia; Wei-Qiang Shi; J. Timothy Duffy; Andrew B. Weiss; Michael C. Fishbein; Warren S. Grundfest
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Paper Abstract

We investigated the effect of varying fluence and pulse width on the ablation rate and consequent thermal damage of the Ho:YAG (2.130 micrometers ) laser. The rate of ablation on fresh bovine knee joint tissues, fibrous cartilage, hyaline cartilage, and bone in saline was determined after varying the fluence (160 - 640 J/cm2) and pulse width (150, 250, 450 microsecond(s) ec, FWHM) at a repetition rate of 2 Hz. A 400/440 micrometers fiber was used. The ablation rate increased linearly with the fluence. In fibrocartilage, different pulse durations generated significant changes in the ablation rates, but showed minor effects on hyaline cartilage and bone. The heat of ablation for all three tissue types decreased after lengthening the pulse.

Paper Details

Date Published: 1 February 1994
PDF: 9 pages
Proc. SPIE 2077, Laser Interaction with Hard and Soft Tissue, (1 February 1994); doi: 10.1117/12.168050
Show Author Affiliations
Sandor G. Vari, Cedars-Sinai Medical Ctr. (United States)
Maurits J. van der Veen, State Univ. Utrecht (Netherlands)
Vani R. Pergadia, Cedars-Sinai Medical Ctr. (United States)
Wei-Qiang Shi, Cedars-Sinai Medical Ctr. (United States)
J. Timothy Duffy, Cedars-Sinai Medical Ctr. (United States)
Andrew B. Weiss, Cedars-Sinai Medical Ctr. (United States)
Michael C. Fishbein, Cedars-Sinai Medical Ctr. (United States)
Warren S. Grundfest, Cedars-Sinai Medical Ctr. (United States)


Published in SPIE Proceedings Vol. 2077:
Laser Interaction with Hard and Soft Tissue
Martin J. C. van Gemert; Rudolf W. Steiner; Lars Othar Svaasand; Hansjoerg Albrecht, Editor(s)

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