Pulsed Tm:YAG laser ablation of knee joint tissues

Wei-Qiang Shi; Sandor G. Vari M.D.; J. Timothy Duffy; J. M. Miller; Andrew B. Weiss; Michael C. Fishbein M.D.; Warren S. Grundfest M.D.

doi:10.1117/12.137366

1 June 1992 Pulsed Tm:YAG laser ablation of knee joint tissues

Wei-Qiang Shi, Sandor G. Vari M.D., J. Timothy Duffy, J. M. Miller, Andrew B. Weiss, Michael C. Fishbein M.D., Warren S. Grundfest M.D.

Author Affiliations +

Proceedings Volume 1643, Laser Surgery: Advanced Characterization, Therapeutics, and Systems III; (1992) https://doi.org/10.1117/12.137366
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

We investigated the effect of a free-running 2.01 micron pulsed Tm:YAG laser on bovine knee joint tissues. Ablation rates of fresh fibrocartilage, hyaline cartilage, and bone were measured in saline as a function of laser fluence (160 - 640 J/cm²) and fiber core size (400 and 600 microns). All tissues could be effectively ablated and the ablation rate increased linearly with the increasing fluence. Use of fibers of different core sizes, while maintaining constant energy fluence, did not result in significant difference in ablation rate. Histology analyses of the ablated tissue samples reveal average Tm:YAG radiation induced thermal damage (denatunalization) zones ranging between 130 and 540 microns, depending on the laser parameters and the tissue type.

Citation Download Citation

Wei-Qiang Shi, Sandor G. Vari M.D., J. Timothy Duffy, J. M. Miller, Andrew B. Weiss, Michael C. Fishbein M.D., and Warren S. Grundfest M.D. "Pulsed Tm:YAG laser ablation of knee joint tissues", Proc. SPIE 1643, Laser Surgery: Advanced Characterization, Therapeutics, and Systems III, (1 June 1992); https://doi.org/10.1117/12.137366

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