Thulium:YAG laser for stapes surgery: preliminary observations

Ian Bottrill M.D.; Donald F. Perrault Jr.; Michail M. Pankratov; Dennis S. Poe M.D.

doi:10.1117/12.184903

7 September 1994 Thulium:YAG laser for stapes surgery: preliminary observations

Ian Bottrill M.D., Donald F. Perrault Jr., Michail M. Pankratov, Dennis S. Poe M.D.

Proceedings Volume 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV; (1994) https://doi.org/10.1117/12.184903
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

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.

Citation Download Citation

Ian Bottrill M.D., Donald F. Perrault Jr., Michail M. Pankratov, and Dennis S. Poe M.D. "Thulium:YAG laser for stapes surgery: preliminary observations", Proc. SPIE 2128, Laser Surgery: Advanced Characterization, Therapeutics, and Systems IV, (7 September 1994); https://doi.org/10.1117/12.184903

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