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Proceedings Paper

Effects of a high-power high-energy holmium:YAG laser on human meniscal ablation rates
Author(s): Vahid Saadatmanesh; C. Thomas Vangsness; Bahram Ghaderi; Naomi F. Gong
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Paper 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.

Paper Details

Date Published: 7 September 1994
PDF: 16 pages
Proc. SPIE 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV, (7 September 1994); doi: 10.1117/12.184890
Show Author Affiliations
Vahid Saadatmanesh, Trimedyne, Inc. (United States)
C. Thomas Vangsness, Univ. of Southern California (United States)
Bahram Ghaderi, Univ. of Southern California (United States)
Naomi F. Gong, Trimedyne (United States)

Published in SPIE Proceedings Vol. 2128:
Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV
R. Rox Anderson; R. Rox Anderson, Editor(s)

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