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Bruce J. Gantz, MD, Brian F. McCabe, MD, and Richard S. Tyler, PhD, of the University of Iowa Hospitals, Iowa City, described their surgical technique for implanting multichannel cochlear prostheses in three patients with severe bony obliteration of the cochlear duct. They reported their findings to the American Neurotology Society meeting in Denver.
The operation required more exposure than the traditional facial recess approach. The tympanic membrane and ossicles were removed, and the eustachian tube was obliterated. A trough was drilled into the first turn of the cochlea to a length of 22 to 24 mm. A multichannel electrode was secured in the trough by a piece of temporalis fascia, and the ear canal was oversewed.
Preliminary results indicated that two of three patients were successful implant users. The authors concluded that special techniques should be refined for multichannel implantation in severely diseased ears.
HUGHES GB. Use of Multichannel Cochlear Implants in Obstructed and Obliterated Cochleas. Arch Otolaryngol Head Neck Surg. 1987;113(9):919. doi:10.1001/archotol.1987.01860090017005
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