CO2 laser myringotomy with a hand-held otoscope and fiber optic delivery system: animal experimentation and preclinical trials

Ari DeRowe; Dov Ophir; Y. Finkelstein; Abraham Katzir

doi:10.1117/12.147013

1 July 1993 CO₂ laser myringotomy with a hand-held otoscope and fiber optic delivery system: animal experimentation and preclinical trials

Ari DeRowe, Dov Ophir, Y. Finkelstein, Abraham Katzir

Author Affiliations +

Proceedings Volume 1876, Lasers in Otolaryngology, Dermatology, and Tissue Welding; (1993) https://doi.org/10.1117/12.147013
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

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.

Citation Download Citation

Ari DeRowe, Dov Ophir, Y. Finkelstein, and Abraham Katzir "CO₂ laser myringotomy with a hand-held otoscope and fiber optic delivery system: animal experimentation and preclinical trials", Proc. SPIE 1876, Lasers in Otolaryngology, Dermatology, and Tissue Welding, (1 July 1993); https://doi.org/10.1117/12.147013

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