Effects of a high-power high-energy holmium:YAG laser on human meniscal ablation rates

Vahid Saadatmanesh; C. Thomas Vangsness M.D.; Bahram Ghaderi; Naomi F. Gong

doi:10.1117/12.184890

7 September 1994 Effects of a high-power high-energy holmium:YAG laser on human meniscal ablation rates

Vahid Saadatmanesh, C. Thomas Vangsness M.D., Bahram Ghaderi, Naomi F. Gong

Proceedings Volume 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV; (1994) https://doi.org/10.1117/12.184890
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

Using a pulsed Holmium:YAG laser at a wavelength of 2.1 microns, the ablation rates and thermal effects were measured on human meniscal cartilage. The penetration rate of a fiber under saline was measured as well as the mass loss in an air environment. Fluences were varied between 167 - 927 J/cm²/pulse for the penetration rate experiment and between 38 - 490 J/cm²/pulse for the mass loss experiment. Ablation threshold was found to be 10.6 J/cm² in air. A double pulsing scheme used to reduce acoustic effects showed equivalent tissue ablation effects. The increases in ablation rates were directly proportional to the increases in pulse fluence for both methods. Histologic examination showed the lateral thermal change to be a maximum of 600 microns in air at 24 pulses per second.

Citation Download Citation

Vahid Saadatmanesh, C. Thomas Vangsness M.D., Bahram Ghaderi, and Naomi F. Gong "Effects of a high-power high-energy holmium:YAG laser on human meniscal ablation rates", Proc. SPIE 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV, (7 September 1994); https://doi.org/10.1117/12.184890

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