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Proceedings Paper

Penetration and mass loss rates with different energy levels in the human meniscus for the holmium:YAG laser
Author(s): C. Thomas Vangsness; Bahram Ghaderi; Marshall Brustein; Vahid Sadettmanesh; Joan Hawver
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Paper Abstract

Using a pulsed Holmium:YAG laser, wavelength 2.1 micrometers , the ablation rate and thermal effect were measured on human meniscal cartilage. Holding the pulsewidth and repetition rate constant, fluences per pulse were varied between 167 - 927 J/cm2/pulse for the penetration rate and between 1.7 - 100 J/cm2/pulse for the mass loss rate. The fastest ablation rate was found at 927 J/cm2/pulse for the penetration rate and at 100 J/cm2/pulse for the mass loss rate. The thresholds were 53 J/cm2/pulse and 1.36 J/cm2/pulse, respectively. The increases in ablation rate were directly proportional to increases in fluences for both methods. Histological examination showed the average lateral thermal change to be 400 - 500 micrometers and 400 - 460 micrometers , respectively, with no relation to level of fluence.

Paper Details

Date Published: 21 July 1993
PDF: 1 pages
Proc. SPIE 1880, Lasers in Orthopedic, Dental, and Veterinary Medicine II, (21 July 1993); doi: 10.1117/12.148331
Show Author Affiliations
C. Thomas Vangsness, Univ. of Southern California (United States)
Bahram Ghaderi, Univ. of Southern California (United States)
Marshall Brustein, Univ. of Southern California (United States)
Vahid Sadettmanesh, Univ. of Southern California (United States)
Joan Hawver, Univ. of Southern California (United States)


Published in SPIE Proceedings Vol. 1880:
Lasers in Orthopedic, Dental, and Veterinary Medicine II
Dov Gal; Stephen J. O'Brien; C. T. Vangsness; Joel M. White; Harvey A. Wigdor, Editor(s)

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