Audiological Evaluation of Traumatic Brain Injury – A Case Study

Abstract

Background: Traumatic brain injury (TBI) is a pathology frequently causing mortality or serious sequelae. About 20% of individuals with TBI will have some degree of auditory alteration. The aim of the present study was to use behavioural and electrophysiological assessments to analyse the hearing of a patient with TBI.Case report: A young male adult who had suffered severe TBI caused by a motorcycle accident was evaluated. The patient underwent a peripheral hearing evaluation and electrophysiological assessment. Pure tone audiometry revealed profound sensorineural hearing loss in the left ear and normal hearing in the right. In the electrophysiological assessment, an ABR click test showed the presence of a response in the right ear at 80 dB HL but no response in the left ear at 90 dB HL. Evaluation of the Middle Latency Response revealed the presence of both an electrode effect (C3) and an ear effect (A1). The P300 wave showed an event-related potential within normal limits in the right ear and no responses in the left. Conclusions:The present case study verifies the importance of assessing the peripheral and central auditory nervous system in cases of patients with a history of TBI. It reinforces the need for diagnosis and audiological monitoring of these patients.