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Proceedings Paper

CO2 laser myringotomy with a hand-held otoscope and fiber optic delivery system: animal experimentation and preclinical trials
Author(s): Ari DeRowe; Dov Ophir; Y. Finkelstein; Abraham Katzir
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Paper Abstract

CO2 laser myringotomy has previously been proven effective in patients with serous otitis media for short term aeration of the middle ear. However, the system based on a microscope and a coaxially aligned laser is cumbersome and expensive. Also, conventional optical fibers do not transmit CO2 laser energy ((lambda) equals 10.6 micrometers ). We have developed a silver halide optical fiber of diameter 0.9 mm and lengths of several meters, with high transmission at 10.6 micrometers . Using a hand held otoscope coupled to a fiberoptic delivery system CO2 laser myringotomies were performed first in guinea pigs and then in humans. In the animal model the feasibility of the procedure was proven. Different irradiation parameters were studied and a `dose dependent' relationship was found between the total energy used and the duration of a patent myringotomy. This system was used to perform CO2 laser myringotomies under local anesthesia in five patients with serous otitis media and conductive hearing loss. None of the patients complained of discomfort and no scarring was noted. All patients had subjective and audiometric documentation of hearing improvement. The average duration of a patent myringotomy was 21 days. In two patients the effusion recurred. CO2 laser myringotomy utilizing a hand held otoscope coupled to an optical fiber capable of transmitting CO2 laser energy may prove simple and effective in the treatment of serous otitis media.

Paper Details

Date Published: 1 July 1993
PDF: 6 pages
Proc. SPIE 1876, Lasers in Otolaryngology, Dermatology, and Tissue Welding, (1 July 1993); doi: 10.1117/12.147013
Show Author Affiliations
Ari DeRowe, Tel Aviv Univ. and Meir Hospital (Israel)
Dov Ophir, Meir Hospital (Israel)
Y. Finkelstein, Meir Hospital (Israel)
Abraham Katzir, Tel Aviv Univ. (Israel)

Published in SPIE Proceedings Vol. 1876:
Lasers in Otolaryngology, Dermatology, and Tissue Welding
R. Rox Anderson M.D.; Lawrence S. Bass M.D.; Stanley M. Shapshay M.D.; John V. White M.D.; Rodney A. White, Editor(s)

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