Prognostic Value of Auditory Brainstem Evoked Response in Patients with Idiopathic Sudden Sensorineural hearing loss.

Abstract

Background: A hearing loss of at least 30 decibels over three successive frequencies in less than 72 hours is referred to as idiopathic sudden sensorineural hearing loss (ISSNHL).Auditory brainstem response may serve as a potential prognostic indication in patients with ISSNHL, according to several studies.Low serum thyroid hormone levels can contribute to hearing loss since they are strongly tied to the cochlea's proper functioning.Aim: To investigate the prognostic value of ABR and the association between its results and the thyroid hormone serum levels in ISSNHL patients. Methods: Observational prospective study was conducted on thirty patients with ISSNHL that occurred within the last 72 h with 30 dB hearing loss at three sequential frequencies. Pure tone audiometry, word discrimination scores, immittencemetry and auditory brain stem response were performed on the day of admission then again on the third day after admission and one month later. Thyroid