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Proceedings Paper

Autopulsar-an alternative treatment mode for the CO2 medical laser
Author(s): Ruth Anne Waters; R. Marc Clement; N. Richard Ledger; K. Williams
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Paper Abstract

When used in continuous wave (cw) mode the CO2 laser is an effective tool for vaporizing unwanted tissue, however, there is the possibility of the accumulation of thermal energy in the good tissue close to the point of treatment. If this thermal energy is high then post operative pain and scarring could result. This is avoidable by delivering the energy in short pulses with the gap between those pulses being greater than the thermal relaxation time of the tissue (which can vary according to tissue type that is typically 0.5 to 3.0 ms). Simply chopping the laser beam rapidly would produce the desired thermal effect but would waste a large percentage of the laser energy and greatly extend the treatment time since the average output power of the laser is compromised. The ideal scenario is where the laser power is enhanced for the on period producing an average power similar to that obtained in cw mode.

Paper Details

Date Published: 15 February 1994
PDF: 4 pages
Proc. SPIE 2086, Medical Applications of Lasers, (15 February 1994); doi: 10.1117/12.169143
Show Author Affiliations
Ruth Anne Waters, West Norwich Hospital (United Kingdom)
R. Marc Clement, Swansea Institute of Higher Education (United Kingdom)
N. Richard Ledger, SLS (Wales) Ltd. (United Kingdom)
K. Williams, SLS (Wales) Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 2086:
Medical Applications of Lasers
Kazuhiko Atsumi M.D.; Cornelius Borst M.D.; Frank W. Cross M.D.; Herbert J. Geschwind M.D.; Dieter Jocham; Jan Kvasnicka; Hans H. Scherer M.D.; Mario A. Trelles; Eberhard Unsoeld, Editor(s)

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