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KMID : 0858620020060020142
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Korean Journal of Audiology
2002 Volume.6 No. 2 p.142 ~ p.147
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Comparison between Auditory Brainstem Response(ABR) Thresholds Measured by Click Stimulation and Pure-Tone Thresholds after Long Term Follow-Up in Children with Sensorineural Hearing Loss
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Won Eun-Young
Hong Sung-Hwa
Kim Jin-Sook
Lee Jung-Hak
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Abstract
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Electric response audiometry has taken an important place in the objective assessment of hearing loss in children. Among the various types of auditory evoked potentials, auditory brainstem response (ABR) has become the most commonly applied in the clinical use. In this study several aspects of ABR and pure tone audiometry (PTA) were compared in children with sensorineural hearing loss. Children (105 ears) up to 5 years tested by ABR over 7-year period, from January 1994 to March 2002 and they were followed up by PTA. The interval between ABR and PTA was within 5 years. Click-evoked ABR thresholds appeared to be higher than PTA thresholds in all frequencies. The mean differences across frequencies between ABR and PTA thresholds were 0.3 to 16.0 dB and standard deviations (SD) were 13.2 to 19.3 dB. The smallest mean difference value was observed at 8 kHz. Correlation between ABR and PTA thresholds was largest in 1 to 8 kHz frequency range. However correlation between ABR and 1, 2, 4 kHz mean pure tone thresholds showed higher correlation than individual pure tone thresholds. The results of this study will provide a basis for behavioral thresholds prediction in children with sensorineural hearing loss and help for selecting hearing aids or cochlear implants.
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KEYWORD
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ABR, PTA, SNHL, Threshold
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