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Τρίτη 12 Δεκεμβρίου 2017

Prognosticating hearing outcome in patients with idiopathic sudden sensorineural hearing loss by means of otoacoustic emissions and auditory brainstem response

Masoud Motasaddi Zarandy, MD; Mohammad Taghi Khorsandi Ashtiani, MD; Shahin Bastaninejad, MD; Sasan Dabiri Satri, MD; Sevil Nasirmohtaram, MD; Nourullah Agha Ebrahimi, BSC

Abstract

This is an analytic-descriptive study, parallel with a randomized, controlled trial performed at Amir'Alam Hospital, a tertiary referral center, with the aim of evaluating the correlation between otoacoustic emission (OAE) and auditory brainstem response (ABR) findings with hearing outcome after treatment of idiopathic sudden sensorineural hearing loss (SSNHL). Sixty patients with idiopathic SSNHL who presented to the emergency services and otology clinics between 2012 and 2014, and whose symptoms had begun <10 days previously, enrolled in this study. Before commencing treatment, distortion-product OAE (DP-OAE) and ABR were performed for all patients. They also underwent magnetic resonance imaging ± gadolinium. Therapeutic intervention was done in a parallel randomized, controlled trial, and responders to the medical therapy were selected for our final analysis. There was no significant correlation between the OAE record and responsiveness to treatment, but there was a correlation between ABR presence and the probability of responsiveness in patients with profound hearing loss who responded to medical therapy and had at least wave V ABR. However, in those who had no recorded wave, the response to treatment was variable. In conclusion, in patients with profound hearing loss, studying the waves of ABR could be a factor in predicting hearing loss resolution after treatment.

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