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A comparison of auditory brainstem response obtained using monaural and binaural stimulation in normal children and in children with hearing loss.

Authors:Shivaji Chalak, Anita Kale, A Rawekar, Nazli Khatib, V K Deshpande, D A Biswas
Int J Biol Med Res. 2013; 4(3): 3453-3457  |  PDF File

Abstract

Abstract: Objectives: To compare the Auditory Brainstem Response (ABR) obtained using monaural and binaural stimulations in normal children and in children with hearing loss. Methods: This case control experimental study was conducted on 80 children out of whom 40 were apparently healthy and 40 having bilateral symmetrical sensory neural hearing loss. Database was collected after assessing with otological questionnaire, otoscopic examination and audiometric evaluation. Brainstem Evoked Response Audiometry (BERA) was used as a tool for assessment of hearing loss. Results: Results showed that there was a significant difference between monaurally and binaurally obtained wave V/I amplitude ratios and ABR thresholds. The thresholds obtained by binaural presentation were lower than that by monaural presentation in children of both the groups. It was also found that mode of presentation does not affect the Absolute latencies and Inter peak Latencies in both the groups. Conclusion: Overall it was concluded that binaural mode of presentation improves wave V/I amplitude ratios and thresholds thus proving its accuracy over routinely used monaural mode of presentation in bilateral symmetrical sensory neural hearing loss. The study promotes the use of binaural mode of presentation by neurophysiologists as it not only saves valuable clinical time but also improves the diagnostic accuracy.