Pedley Karen, Psarros Colleen, Gardner-Berry Kirsty, Parker Alison, Purdy Suzanne C, Dawson Pam, Plant Kerrie
CRC for Cochlear Implant and Hearing Aid Innovation, Melbourne, Australia.
Int J Audiol. 2007 May;46(5):254-62. doi: 10.1080/14992020601014979.
We investigated the acceptability of electrophysiologically derived MAPs and the effect of these MAPs on speech perception in elderly adults using Nucleus 24 cochlear implants. Eight implant recipients aged 75 years or older trialed an electrophysiologically derived MAP and a behavioral MAP. The electrophysiologically derived MAP was based on the threshold and maximum comfort level for electrode 10 and evoked compound action potential thresholds measured on six electrodes using neural response telemetry (NRT). Word perception at 55 dB SPL and sentence perception in noise at 70 dB SPL were assessed after six weeks take-home experience and again after an additional two weeks of experience. During the final two weeks of take-home experience participants indicated their preferred MAP for different listening situations. The NRT derived MAP estimated behavioral T levels well, but underestimated behavioral C levels for apical electrodes in some subjects. Speech perception with NRT derived MAPs was comparable to speech perception with behaviorally measured MAPs. MAPs estimated from NRT data provided good speech perception outcomes for elderly implant recipients and were well tolerated.
我们使用Nucleus 24型人工耳蜗，研究了电生理学衍生的言语处理器设置（MAPs）在老年成人中的可接受性，以及这些言语处理器设置对言语感知的影响。八名75岁及以上的植入者试用了电生理学衍生的言语处理器设置和行为言语处理器设置。电生理学衍生的言语处理器设置基于电极10的阈值和最大舒适水平，以及使用神经反应遥测（NRT）在六个电极上测量的诱发复合动作电位阈值。在六周的居家体验后以及再额外两周的体验后，评估了55 dB SPL时的单词感知和70 dB SPL时噪声中的句子感知。在居家体验的最后两周，参与者指出了他们在不同聆听情况下喜欢的言语处理器设置。NRT衍生的言语处理器设置能较好地估计行为T水平，但在一些受试者中低估了顶端电极的行为C水平。使用NRT衍生的言语处理器设置时的言语感知与使用行为测量的言语处理器设置时的言语感知相当。从NRT数据估计的言语处理器设置为老年植入者提供了良好的言语感知结果，并且耐受性良好。
