European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery · 2026
Frequency of electrode migration and other device-related complications in a large single-center cochlear implant cohort.
СтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
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van de Loo Julia, Lang-Roth Ruth, Müller Verena, Kurzawa Maya, Mayer Marcel, Sharaf Kariem, Jansen Louis, Kourou Sofia, Klussmann Jens Peter, Lüers Jan Christoffer
Аннотация
BACKGROUND: Electrode migration and magnet dislocation are uncommon but clinically relevant complications following cochlear implant (CI) surgery. Most previously published studies are limited by small sample sizes, restricting the ability to precisely estimate incidence rates and risk factors.
OBJECTIVE: To determine the frequency, mechanisms, and clinical correlates of rare CI complications in one of the largest contemporary single-center CI cohorts.
METHODS: This retrospective study analyzed 1,035 CI surgeries performed between 2015 and 2025 at a tertiary referral center. Clinical, demographic, surgical, and audiologic data were extracted from institutional databases. Electrode migration was confirmed via imaging and surgical exploration.
RESULTS: Electrode migration occurred in 16 cases (1.55%). Affected patients were significantly older than the remaining cohort (56.4 ± 17.7 vs. 37.1 ± 27.7 years, p = 0.005). Time to diagnosis ranged from 1 week to 14 years following CI surgery. Magnet dislocation occurred in seven patients (0.68%), exclusively following MRI exposure. An exchange of an implant with consecutive electrode re-insertion for other causes was required in 53 patients (5.1%), predominantly due to device failure (77.4%). Almost exclusively straight electrodes were used in our cohort (95.5%).
CONCLUSION: In this large CI cohort, electrode migration was rare but more frequent in older adults. Our findings highlight the need for standardized surgical anchoring techniques, structured postoperative surveillance, and future research on biomechanical risk factors to improve CI safety and long-term outcomes.
OBJECTIVE: To determine the frequency, mechanisms, and clinical correlates of rare CI complications in one of the largest contemporary single-center CI cohorts.
METHODS: This retrospective study analyzed 1,035 CI surgeries performed between 2015 and 2025 at a tertiary referral center. Clinical, demographic, surgical, and audiologic data were extracted from institutional databases. Electrode migration was confirmed via imaging and surgical exploration.
RESULTS: Electrode migration occurred in 16 cases (1.55%). Affected patients were significantly older than the remaining cohort (56.4 ± 17.7 vs. 37.1 ± 27.7 years, p = 0.005). Time to diagnosis ranged from 1 week to 14 years following CI surgery. Magnet dislocation occurred in seven patients (0.68%), exclusively following MRI exposure. An exchange of an implant with consecutive electrode re-insertion for other causes was required in 53 patients (5.1%), predominantly due to device failure (77.4%). Almost exclusively straight electrodes were used in our cohort (95.5%).
CONCLUSION: In this large CI cohort, electrode migration was rare but more frequent in older adults. Our findings highlight the need for standardized surgical anchoring techniques, structured postoperative surveillance, and future research on biomechanical risk factors to improve CI safety and long-term outcomes.