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KMID : 0361020230660060375
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Korean Journal of Otolaryngology - Head and Neck Surgery
2023 Volume.66 No. 6 p.375 ~ p.380
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Analysis of the Latency of Auditory Brainstem Response Wave V in Infants According to Age, Hearing Threshold and Stimulus Intensity
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Kim Young-Gun
Jeong sung-Wook
Choi Ah-Hyun
Yun Young-Bin
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Abstract
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Background and Objectives The latency of auditory brainstem response (ABR) wave Vshifts depending on age, hearing threshold, and stimulus intensity. This study was performedto examine the latencies of ABR wave V in infants with normal hearing and sensorineuralhearing loss.
Subjects and Method The retrospective review of ABR of 318 infants (539 ears) was per-formed. The patients were divided into four groups according to age at the time of the ABRtest (group A: 0-2 months, group B: 3-5 months, group C: 6-8 months, and group D: 9-11months). The test was performed using click sound under sedation, with the stimulus intensityadjusted by 10 dB intervals. The latency of wave V was analyzed according to age, hearingthreshold, and stimulus intensity.
Results Normal hearing was detected in 320 ears (wave V threshold of 20 dBnHL or less)and sensorineural hearing loss was found in 219 ears. Wave V latencies decreased with in-crease in age and stimulus intensity in both normal hearing infants and hearing-impaired in-fants. The ears with higher thresholds showed longer latencies at the same stimulus intensity.
The normative data of wave V latency of infants with varying hearing thresholds according toage and stimulus intensity could be determined.
Conclusion The present study examined the latencies of ABR wave V of hearing-impairedand normal hearing infants according to age and stimulus intensity. The data will help audiol-ogists to evaluate the hearing of infants who are referred for ABR test.
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KEYWORD
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Auditory brainstem response, Infant, Sensorineural hearing loss,
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