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Cochlear Implantation via Middle-turn Cochleostomy in Labyrinthitis Ossificans Patientis
Dept. of Otorhinolaryngology, Yonsei Univ. College of Medicine
Nam-suk SIM, Nam-suk SIM, Jae-young CHOI
We present 2 cases of cochlear implantation via Middle-turn cochleostomy. A 19-year-old woman presented with severe hearing impairment of both ears since she had bacterial meningitis at the age of 4. Temporal bone computed tomography(TBCT) showed calcified obliteration of bilateral cochlea and SCCs, suggesting labyrinthitis ossificans. We planned cochlear implantation through middle turn cochleostomy on right side. Intraoperatively, electrode was easily inserted without resistance. The electrode was fully inserted in middle turn in transorbital ocular view examined on immediate postop. A 53-year-old female presented with severe hearing impairment of both ears for 2 years after undergoing cerebral clipping surgery due to cerebral infarction. 1 year ago, Right cochlear implantation was tried in other clinic, but electrode insertion was failed. TBCT revealed both labyrinthine ossification. We planned right revision cochlear implantation via middle-turn cochleostomy. Intraoperatively, electrode was easily inserted without resistance. The electrode was fully inserted in middle turn in transorbital ocular view examined on immediate postop.


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