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Proceedings Paper

In vitro study of pulsed Ho:YAG laser meniscectomy
Author(s): Steven L. Jacques; Jon A. Schwartz; Gary Gofstein; C. Thomas Vangsness M.D.
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Paper Abstract

The ablation of ex vivo human samples of meniscus using the pulsed holmium:YAG (Ho:YAG) laser was studied. Delivery was by optical fiber in contact with the tissue. The rate of ablation was determined as (mm/pulse) for a range of pulse energies. Ablation with tissue in air versus under saline yielded similar rates of ablation, with the under-saline rate slightly higher. Experiments with two optical fiber sizes (200 micrometers and 600 micrometers ) suggested that total pulse energy [J/pulse] rather than radiant exposure [J/cm2/pulse] may be the better predictor for ablation rate. For comparison, results of a study of continuous Nd:YAG laser ablation of chicken breast using two beam sizes are also presented which suggest that total beam power [W] rather than irradiance [W/cm2] may be the better predictor for ablation rate. Comparison with the efficiency of simple boiling water indicates that laser ablation (both pulsed and continuous) is only about 10% as efficient as boiling water.

Paper Details

Date Published: 7 September 1994
PDF: 7 pages
Proc. SPIE 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV, (7 September 1994); doi: 10.1117/12.184889
Show Author Affiliations
Steven L. Jacques, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Jon A. Schwartz, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Gary Gofstein, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
C. Thomas Vangsness M.D., Univ. of Southern California (United States)


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

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