영유아에서 청성뇌간반응과 청성지속반응의 역치 비교
Comparison of Auditory Brainstem Response and Auditory Steady-State Response Thresholds in Infants and Young Children
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Abstract
Background and Objectives：The aim of this study was to assess the accuracy of threshold estimates determined by the auditory steady-state response (ASSR) in a group of sedated infants and young children with a range of hearing losses. Materials and Method：Two studies were performed because the behavioral audiometric information was not available from infants and young children. In the first study, a retrospective analysis was performed for 36 children (mean age：3 years 4 months) who had completed auditory brainstem response (ABR) and pure tone audiometry to verify that ABR threshold is a good predictor for pure tone threshold in our laboratory. The ABR thresholds to 500 Hz, 1000 Hz tone-pip and click were compared with behavioral thresholds. In the second study, a prospective analysis of 23 children (mean age：12 months), the ABR thresholds to 500 Hz, 1000 Hz tone-pip and click were compared with ASSR thresholds to amplitude and frequency modulated tones. Results：The first study in which strong correlations were found between ABR and pure tone thresholds (r≥0.92) demonstrated that ABR thresholds could be used to predict the pure tone thresholds. The second study which showed that ASSR thresholds were highly correlated with ABR thresholds (r≥0.93) indicated that ASSR thresholds provided reliable audiometric information in infants and young children. Conclusion：These studies showed that ASSR could be used to estimate hearing thresholds with reliable accuracy in infants and young children.
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