The influence of Slim Modiolar electrode on residual hearing in pediatric patients
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OTOLOGY
The influence of Slim Modiolar electrode on residual hearing in pediatric patients Karolina Haber1 · Alexandra Neagu2 · Wiesław Konopka3 · Katarzyna Amernik4 · Dan Cristian Gheorghe2,5 · Maria Drela1 · Iwona Wrukowska‑Niemczewska1 · Józef Mierzwiński1,6 Received: 24 June 2020 / Accepted: 28 August 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Purpose Hearing preservation cochlear implantation is an established procedure in patients with low-frequency residual hearing, especially in pediatric cochlear implantation. More delicate, thin electrode arrays can minimize damage in the inner ear and enhance the possibility for residual hearing preservation. The Cochlear® CI532 electrode has been reported as an electrode with the potential for residual hearing preservation. No similar studies pertaining to hearing preservation in pediatric patients have appeared to date. The aim of this study was to investigate whether the Cochlear® CI532 Slim Modiolar electrode allows the preservation of low-frequency residual hearing in children undergoing cochlear implantation. Methods In this multicenter, nonrandomized, prospective clinical cohort study, medical data of 14 pediatric patients implanted with the CI532 were collected. All patients had residual low-frequency hearing (preoperative audiogram or ABR with at least one threshold better than 90 dB HL at 125, 250, 500, or 1000 Hz). Postoperative thresholds were obtained 1, 3, 6, and 12 months after cochlear implantation. Results Based on the HEARRING classification, 78.6% of children (11/14) had complete hearing preservation at the last follow-up visit (12 months after CI, or if not available, 6 months). A total of 21.4% (3/14) had partial hearing preservation. At the last follow-up visit, neither minimal hearing preservation nor loss of hearing was observed. Functional low-frequency hearing was preserved in 13 out of 14 patients (93%). Conclusions The residual hearing preservation results in children were superior to the results previously reported in adults. Keywords Cochlear implant · Residual hearing · CI532 · Slim Modiolar
Introduction * Karolina Haber [email protected] 1
Department of Otolaryngology, Audiology and Phoniatrics, Pediatric Cochlear Implant Program, Children’s Hospital of Bydgoszcz, Ul. Chodkiewicza 44, 85‑667 Bydgoszcz, Poland
2
ENT Clinic, Paediatric Emergency Hospital M.S. Curie, Bucharest, Romania
3
Department of Otolaryngology, Polish Mother’s Memorial Hospital, ul. Rzgowska 281/289, 93‑338 Łódź, Poland
4
Autonomous Public Clinical Hospital No. 1 of Pomeranian Medical University, ul. Unii Lubelskiej 1, 71‑242 Szczecin, Poland
5
Department of Otorhinolaryngology, Carol Davila University, Bucharest, Romania
6
Department of Preventive Nursing, Nicolaus Copernicus University, Collegium Medicum, Łukasiewicza 1, 85‑821 Bydgoszcz, Poland
Initially, it was believed that residual hearing would usually be lost after cochlear implantation. In 1987, William House reported that of 13
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