Introduction: some studies report the importance of the cochlear function monitoring when dealing with patients exposed to ototoxic drugs or agents. A lot of research about test-retest reliability of the otoacoustic emissions was done to validate its use on cochlear monitoring. Nevertheless, our clinical experience shows us that the measured variations differ from those described in the literature. Aim: verify the variation of the transient evoked otoacoustic emissions and the distortion product otoacoustic emissions. Study design: clinical prospective randomized. Material and method: we studied 10 normal hearing young adults, using the Madsen, Celesta 503 program. Three serial evaluations were done, with a minimal interval of three weeks, maintaining variables such as olive size, number of sweeps and stimulus intensity controlled. Results: showed that the transient evoked otoacoustic emissions amplitude varied less than distortion product otoacoustic emissions amplitude and that the amplitude of the initial response was not determinant in the amount of variability.
otoacoustic emissions; transient evoked otoacoustic emissions; distortion product otoacoustic emissions; test-retest reliability
