Instructions of Neural Response Telemetry for Prediction of the Rehabilitation Effects and Mapping in Children Cochlear Implant / 听力学及言语疾病杂志

ABSTRACT

Objective To study the stability of NRT threshold and the correlation between NRT threshold and the value of behavior T ,C in order to instruct mapping in infant cochlear implant ,and to study whether the elic‐itation of NRT waveform can be applied to determine the effects of rehabilitation .Methods There were 159 cases with complete information in data in this study .150 out of the 159 cases coincided with the study requirements of the changes and correlation .We had collected the NRT thresholds of the electrodes of No .1 ,6 ,11 ,16 ,22 in switch-on ,one month after switched -on ,half a year and one year after switched -on .The analysis of variance method was adopted to compare the threshold changes of each electrode in different stages .We had collected the values of behavior T ,C in one year after switched -on .Pearson regression analysis was used to compare the correlation be‐tween NRT threshold in switch -on and this value of behavior T ,C .We applied MAIS assessment scale to make a questionnaire for all 159 patients during the follow -up at one year after switched -on .We had gathered the scores in three aspects ,the average score in questionnaire and the average hearing threshold of every child .All children were divided into four groups according to whether the elicitation of NRT waveform during - operation ,post-op‐eration .Results Regarding the NRT threshold ,there was no significant difference in the pairwise comparison of four time points(P>0 .05) .There was positive correlation between NRT threshold and behavior T ,C(P 0 .05) .Conclusion The NRT threshold remains steady from switched -on .A positive correlation exists between NRT threshold and the actual T ,C value .The NRT threshold can be used to estimate the T ,C value .But the accuracy of the measured value is less than the behavior method .We still need to use behavior method to measure as soon as possible .The NRT waveform appearance on the post-operation is more significant than that on the during -operation to prognosis of rehabilitation .