Electrode Migration in Patients with Perimodiolar Cochlear Implant Electrodes.
Migration of a cochlear implant electrode is a hitherto uncommon complication. So far, array migration has only been observed in lateral wall electrodes. Between 1999 and 2014, a total of 27 patients received bilateral perimodiolar electrode arrays at our institution. The insertion depth angle was estimated on the initial postoperative scans and compared with the insertion depth angle of the postoperative scans performed after contralateral cochlear implantation. Seven (25.93%) patients were found to have an electrode array migration of more than 15°. Electrode migration in perimodiolar electrodes seems to be less frequent and to occur to a lower extent than in lateral wall electrodes. Electrode migration was clinically asymptomatic in all cases.
Department of Otolaryngology, Unfallkrankenhaus, Berlin, Germany.
Philipp
P
Mittmann
Grit
G
Rademacher
Sven
S
Mutze
Arneborg
A
Ernst
Ingo
I
Todt
D019929:Cochlear Implantation / Q000379:methods*; D003054:Cochlear Implants; D015331:Cohort Studies; D004567:Electrodes, Implanted; D005548:Foreign-Body Migration / Q000453:epidemiology*; D006319:Hearing Loss, Sensorineural / Q000534:rehabilitation*; D006801:Humans; D012189:Retrospective Studies; D055906:Seveso Accidental Release; D013701:Temporal Bone / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed