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October 1988

Multichannel Cochlear Surgery

Arch Otolaryngol Head Neck Surg. 1988;114(10):1085-1087. doi:10.1001/archotol.1988.01860220019012

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Thomas Balkany, MD, Colorado Otologic Research Center, Denver, reported to the American Otologic Society's spring meeting in Palm Beach, Fla, on multichannel cochlear implants.

Neo-ossification of the cochlea, most commonly seen in deafness due to meningitis, has been reported historically as a possible contraindication to long electrode cochlear implant surgery. The presence of such bone growth was thought previously to require the selection of a short electrode implant.

A series of 37 patients who underwent cochlear implantation in a four-year period were reviewed. Ten of 37 patients were noted to have cochlear neo-ossification at surgery; in seven of ten patients, ossification was predicted preoperatively by a computed tomographic scan.

Of ten subjects, the entire electrode array was fully inserted in nine (eg, 25 or 26 mm). In one patient, the electrode was partially inserted (9 mm) due to bony obstruction of the ascending segment of the basal turn of the

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