Purpose The aim of the study was to assess whether sequential cochlear implantation (CI) with a prolonged interimplant interval ( M = 15.2 years) between the first and second CIs benefited speech recognition and health-related quality of life. Method This prospective study included 14 prelingually deafened participants who received their second CI after a prolonged interimplant interval ( M = 15.2 years). Additionally, speech recognition ability over a 12-month period of bilateral implant use was investigated. The results of the speech recognition test in both quiet and noisy conditions were statistically analyzed for each CI alone and both CIs together. Nijmegen Cochlear Implant Questionnaire scores were also collected at activation and at 12 months after activation. Results Improvements in speech recognition ability were observed following the use of the first implant alone and with the use of both implants together; however, progress was much slower with the use of the second implant alone, following its introduction. Furthermore, a significant difference in the trajectory of speech recognition ability was observed between the first and the second implanted ear. According to Nijmegen Cochlear Implant Questionnaire scores, all participants benefitted from bilateral CI after 12 months. Conclusions Prolonged interimplant intervals resulted in asymmetrical speech recognition abilities. A significant improvement in the speech recognition scores was observed with the first implanted ear, and much slower progress was observed with the second implanted ear. However, the “poorer” second implanted ear could provide a considerable beneficial effect on the improved speech recognition and health-related quality of life with the bilateral CI. Supplemental Material https://doi.org/10.23641/asha.12861152

中文翻译：

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延长时间间隔的顺序双侧人工耳蜗植入术

目的该研究的目的是评估序贯人工耳蜗植入（CI）是否具有延长的植入间隔（中号= 15.2 年）第一个和第二个 CI 有利于语音识别和健康相关的生活质量。 方法这项前瞻性研究纳入了 14 名语前聋的参与者，他们在较长的植入间隔后接受了第二次 CI（中号= 15.2 年）。此外，还对双侧植入物使用 12 个月期间的语音识别能力进行了调查。对每个 CI 单独和两个 CI 一起统计分析安静和嘈杂条件下的语音识别测试结果。奈梅亨人工耳蜗植入问卷评分也在激活时和激活后 12 个月时收集。 结果单独使用第一个植入物和同时使用两个植入物后，观察到语音识别能力有所改善；然而，在引入第二个植入物后，单独使用第二个植入物的进展要慢得多。此外，在第一只和第二只植入耳朵之间观察到语音识别能力轨迹存在显着差异。根据奈梅亨人工耳蜗植入问卷评分，所有参与者在 12 个月后均从双边 CI 中受益。 结论植入间隔时间过长会导致语音识别能力不对称。第一个植入的耳朵的语音识别分数显着提高，而第二个植入的耳朵的进展则慢得多。然而，“较差”的第二只植入耳可以通过双侧 CI 对改善语音识别和与健康相关的生活质量产生相当大的有益影响。 补充材料 https://doi.org/10.23641/asha.12861152