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Proceedings Paper

Thulium:YAG laser for stapes surgery: preliminary observations
Author(s): Ian Bottrill; Donald F. Perrault; Michail M. Pankratov; Dennis S. Poe
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Paper Abstract

This study investigates the value of the Thulium:YAG laser ((lambda) equals 2.01 micrometers ) for otological applications. Fresh human stapes were used. The laser was used at fluences of 64 - 328 J/cm2 per pulse in single pulse application with a pulse width of 700 microsecond(s) ec. The energy was delivered through a 300 micrometers fiber. The stapes were irradiated on an acrylic model vestibule with a thermocouple 2 mm below the surface. Perforations were performed at five fluence settings; the peak and sustained temperature rises were recorded. The `open vestibule' was then exposed to direct laser energy above 2 mm lateral to the thermocouple to mimic an open footplate. The stapes were submitted for pathological examination. The laser output had an average pulse to pulse variability of 8%. On average it took 16 pulses to perforate the footplate at the lowest energy and 2 pulses at the highest. There was little charring of the bone. The results are comparable to other mid-infrared lasers.

Paper Details

Date Published: 7 September 1994
PDF: 8 pages
Proc. SPIE 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV, (7 September 1994); doi: 10.1117/12.184903
Show Author Affiliations
Ian Bottrill, Lahey Clinic Medical Ctr. (United Kingdom)
Donald F. Perrault, Lahey Clinic Medical Ctr. (United States)
Michail M. Pankratov, Lahey Clinic Medical Ctr. (United States)
Dennis S. Poe, Lahey Clinic Medical Ctr. (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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