Department of Speech Language and Hearing Sciences, Sri Ramachandra Institute of Higher Education and Research (DU), Porur, 600116, Tamil Nadu, India.
SRM Medical College Hospital and Research Centre, Kattankulathur, India.
Int J Pediatr Otorhinolaryngol. 2022 Aug;159:111212. doi: 10.1016/j.ijporl.2022.111212. Epub 2022 Jun 17.
Optimizing and validating programming parameters of Thresholds(T) and most comfortable levels(C) is very important in young children using a cochlear implant who may not be able provide behavioral responses. The present study attempts to describe the changes in T/C level with behavioral and Cortical Auditory Evoked Potentials (CAEP) responses. Twenty participants using CI24RE (ST) implant with CP802 speech processor participated in the study. Three experimentally 'sham' programs were created by a) decreasing T levels, b) raising T levels or c) decreasing C levels in the 'everyday' program. Sound field thresholds and speech perception at 50dBHL were measured for all experimental and everyday programs. Acoustically evoked CAEP measures, namely thresholds for three different stimuli of/ba/,/da/and/ga/, along with amplitude and latency at 80dBnHL were recorded for all programs. The results indicated that modification of T levels did not have significant effect on CAEP threshold, latency, amplitude as also on behavioral measures of sound field thresholds and speech perception. However, reduction of C levels resulted in significantly poor sound field thresholds, speech perception as well as CAEP thresholds. Furthermore, it was found that there was a significant correlation between behavioral measures of sound field threshold and speech perception with CAEP measures. Thus, from the present study it may be concluded that behavioral and CAEP responses can be used as indicator to reflect changes in C levels resulting changes in behavioral measures in users of CP802 speech processors.
优化和验证阈值 (T) 和最舒适水平 (C) 的编程参数对于可能无法提供行为反应的使用人工耳蜗的幼儿非常重要。本研究试图描述 T/C 水平随行为和皮质听觉诱发电位 (CAEP) 反应的变化。 20 名使用 CI24RE (ST) 植入物和 CP802 语音处理器的参与者参加了这项研究。通过以下方式创建了三个实验性“假”程序：a）降低 T 水平，b）提高 T 水平，或 c）降低“日常”程序中的 C 水平。为所有实验和日常程序测量声场阈值和 50dBHL 处的语音感知。为所有程序记录了听觉诱发的 CAEP 测量值，即/ba/、/da/和/ga/三个不同刺激的阈值，以及在 80dBnHL 时的幅度和潜伏期。结果表明，T 水平的修改对 CAEP 阈值、潜伏期、幅度以及声场阈值和语音感知的行为测量没有显著影响。然而，C 水平的降低导致声场阈值、语音感知和 CAEP 阈值显著降低。此外，还发现声场阈值和语音感知的行为测量与 CAEP 测量值之间存在显著相关性。因此，从本研究可以得出结论，行为和 CAEP 反应可以用作反映 CP802 语音处理器使用者 C 水平变化导致行为测量变化的指标。
