Tissue effects of Ho:YAG laser with varying fluences and pulse widths

Sandor G. Vari M.D.; Maurits J. van der Veen; Vani R. Pergadia; Wei-Qiang Shi; J. Timothy Duffy; Andrew B. Weiss; Michael C. Fishbein M.D.; Warren S. Grundfest M.D.

doi:10.1117/12.168050

1 February 1994 Tissue effects of Ho:YAG laser with varying fluences and pulse widths

Sandor G. Vari M.D., Maurits J. van der Veen, Vani R. Pergadia, Wei-Qiang Shi, J. Timothy Duffy, Andrew B. Weiss, Michael C. Fishbein M.D., Warren S. Grundfest M.D.

Author Affiliations +

Proceedings Volume 2077, Laser Interaction with Hard and Soft Tissue; (1994) https://doi.org/10.1117/12.168050
Event: Europto Biomedical Optics '93, 1993, Budapest, Hungary

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.

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Sandor G. Vari M.D., Maurits J. van der Veen, Vani R. Pergadia, Wei-Qiang Shi, J. Timothy Duffy, Andrew B. Weiss, Michael C. Fishbein M.D., and Warren S. Grundfest M.D. "Tissue effects of Ho:YAG laser with varying fluences and pulse widths", Proc. SPIE 2077, Laser Interaction with Hard and Soft Tissue, (1 February 1994); https://doi.org/10.1117/12.168050

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