Gordon Karen A, Ebinger Kiara A, Gilden Jan E, Shapiro William H
Cochlear Implant Program, Department of Otolaryngology, The Hospital for Sick Children and the University of Toronto, Canada.
Ann Otol Rhinol Laryngol Suppl. 2002 May;189:42-8. doi: 10.1177/00034894021110s509.
The minimum age for cochlear implantation has been reduced to 12 months in an effort to provide auditory stimulation to children with hearing loss during early development. Because behavioral measures in such young children are limited, objective measures such as the electrically evoked compound action potential (EAP) from the auditory nerve are needed to facilitate measurement of stimulation level requirements. We assessed EAPs recorded by the Nucleus 24 neural response telemetry (NRT) system in children who underwent implantation between 12 and 24 months of age. We recorded EAPs in 37 such children (mean age at implantation, 18.1+/-3.6 months). The EAPs were of large amplitude, and thresholds fell between behavioral T and C levels. A correction factor applied to EAP thresholds provided useful predictions of T levels. The EAPs can be used to ensure that even very young children receive auditory stimulation with their cochlear implants upon device activation.
为了在早期发育阶段为听力损失儿童提供听觉刺激，人工耳蜗植入的最低年龄已降至12个月。由于这类幼儿的行为测量方法有限，因此需要客观测量方法，如来自听神经的电诱发复合动作电位（EAP），以促进对刺激水平需求的测量。我们评估了在12至24个月龄接受植入手术的儿童中，由Nucleus 24神经反应遥测（NRT）系统记录的EAP。我们记录了37名此类儿童（植入时平均年龄为18.1±3.6个月）的EAP。这些EAP振幅较大，阈值介于行为T级和C级之间。应用于EAP阈值的校正因子可对T级进行有效预测。EAP可用于确保即使是非常年幼的儿童在设备激活时也能通过人工耳蜗接受听觉刺激。
