Ocular vestibular evoked myogenic potentials in patients with single sided deafness

Achoimre

Introduction: Clinically unilateral severe to profound sensorineural hearing loss known as single-sided deafness (SSD). It is defined by severe-to-profound hearing thresholds with a poor word recognition ability. SSD is not uncommonly encountered in otology, their symptoms is hearing loss and often associated with the vestibular system. In SSD otolithic dysfunction may be frequently misdiagnosed and majority of patients affected by cochlear and superior vestibular nerve then inferior vestibular nerve. Otolith damage may be present in patients with SSD because they sharing a membranous structure in addition they have similar receptor cell. The vestibule and cochlea may be impacted by the same detrimental elements from an anatomical perspective. Objective: Here, we asses prevalence of vestibular dysfunction by measuring oVEMP, cVEMP and caloric findings in patients with SSD. Methods: This study had two groups of participants: group A, which consisted of 20 patients with normal hearing sensitivity on both sides, and group B, which consisted of 20 participants with SSD. Two groups, each with an age range of 20 to 60 years, were free of vestibular symptoms. Results: showed statistically significant difference in oVEMP between SSD and control group as increase in latencies of P1 (P10) and N1 (N15) of and decrease in amplitude. Conclusion|: OVEMPs is able to identify vestibular signs in patients with SSD who are asymptomatic and have never complained of vestibular impairment, oVEMPs is able to identify vestibular sign in these patients and oVEMP test is the most sensitive test and caloric test most specific for identify important vestibular sign in these patient.