Department of Otolaryngology, Audiology and Phoniatrics, Pediatric Cochlear Implant Program, Children's Hospital of Bydgoszcz, Ul. Chodkiewicza 44, 85-667, Bydgoszcz, Poland.
ENT Clinic, Paediatric Emergency Hospital M.S. Curie, Bucharest, Romania.
Eur Arch Otorhinolaryngol. 2021 Aug;278(8):2723-2732. doi: 10.1007/s00405-020-06342-8. Epub 2020 Sep 8.
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.
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.
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%).
The residual hearing preservation results in children were superior to the results previously reported in adults.
低频残余听力患者的听力保护耳蜗植入术是一种已确立的手术，特别是在儿童耳蜗植入术中。更精细、更薄的电极阵列可以最大限度地减少内耳损伤，并提高残余听力保护的可能性。Cochlear CI532 电极已被报道为一种具有潜在残余听力保护的电极。迄今为止，尚未有关于儿科患者听力保护的类似研究。本研究旨在探讨 Cochlear CI532 薄耳蜗电极是否能使接受耳蜗植入术的儿童保留低频残余听力。
这是一项多中心、非随机、前瞻性临床队列研究，共收集了 14 名植入 CI532 的儿科患者的医疗数据。所有患者均有残余低频听力（术前听力图或 ABR，125、250、500 或 1000Hz 至少有一个阈值好于 90dB HL）。术后阈值在耳蜗植入后 1、3、6 和 12 个月获得。
根据 HEARRING 分类，78.6%的儿童（11/14）在最后一次随访（CI 后 12 个月，或如果不可用，则为 6 个月）时完全保留听力。21.4%（3/14）有部分听力保留。在最后一次随访时，既没有最小听力保留，也没有听力损失。14 例中有 13 例（93%）患者保留了功能性低频听力。
儿童的残余听力保护效果优于以往成人研究的结果。
