불완전 분할 III형 내이 기형을 가진 환자의 와우이식 결과 = Cochlear Implant in Patients with Incomplete Partition Type III

다국어 초록 (Multilingual Abstract)

Background and Objectives：Among inner ear anomaly, incomplete partition type III is a quite rare finding which has pathognomonic
computerized tomographic finding with bilateral, dilatation of lateral end of internal auditory canal, and deficient or
absent bone between internal auditory canal and the basal turn of cochlea. Patients with incomplete partition type III have various
range of hearing impairment and in case of severe hearing loss which cannot get benefit from hearing aids, cochlear implantation
is indicated. In cochlear implantation for incomplete partition type III, perilymph gusher and abnormal electrode position is
highly cautioned. We analyzed cochlear implantation patients with incomplete partition type III to find common intra-operative
finding and complication. Subjects and Method：Temporal bone computerized tomographies of 120 patients who received
cochlear implantation between September, 2002 and March, 2008 in our hospital were reviewed：the imaging of 4 patients were
consistent with typical incomplete partition type III. We reviewed intra-operative finding and postoperative complications along
with hearing outcome. Results：During the operation, perilymph gusher was encountered in all cases, and it was tightly sealed
with subcutaneous tissue and fat with fibrin glue. In patient 1, electrodes were abnormally positioned in IAC causing facial nerve
stimulation. However, the result of postoperative speech perception was good in the patient, and in the rest of patients, the results
were various. Conclusion：The surgeon should be aware of perilymph gusher when cochlear implantation is performed on
patients with characteristic temporal bone computerized tomographic findings and who are suspicious of incomplete partition
type III.

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