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Tinnitus: impact on patients in relation to audiological findings
T A Gabr1, H F Alshabory1, M A Kotait2
1Audiovestibular Medicine Unit, Otolaryngology Department, Faculty of Medicine, Kafrelsheikh University, Kafr El Sheikh, Egypt.
Objective:
Tinnitus is a common auditory disorder in which patients experience noise in the absence of an external source. It is a consequence of irreversible cochlear damage. This study examined the distortion product otoacoustic emissions and P300 components of event-related potentials.
Method:
This study included a control group of 25 normal-hearing adults not complaining of tinnitus and a study group that consisted of 45 normal-hearing adults complaining of tinnitus. Measures included patient history, basic audiological evaluation, the Arabic version of Tinnitus Handicap Inventory, distortion product otoacoustic emissions testing and P300 recording.
Results:
The study group showed significantly higher hearing thresholds at all frequencies as well as delayed latencies and reduced amplitude of P300. The Tinnitus Handicap Inventory showed mean scores of 35.2 ± 16.9, and the distortion product gram showed higher amplitudes in the control group.
Conclusion:
Patients with tinnitus might have neural dysfunction at either peripheral or central levels of the auditory pathway.
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