[Application of distortion product otoacoustic emissions in detection of pseudohypacusis and exaggerated hearing loss].

OBJECTIVE

To explore the role of differential diagnosis of distortion product otoacoustic emissions (DPOAE) in pseudohypacusis and exaggerated hearing loss.

METHOD: Detection and analysis of DPOAE were made by ILO96 Otodynamics Analyzer in the patients complaining of post-traumatic hearing loss and in cooperative in pure tone threshold (PTT) examination.

RESULT: The detective results of DPOAE in 102 patients (121 ears) in cooperative in PTT examination revealed that pseudohypacusis was 66.12% (80/121 ears), exaggerated hearing loss was 33.88% (41/121 ears). The reactive threshold value determined by auditory brainstem response (ABR) in these patients confirmed that the results of DPOAE were objective and reliable.

CONCLUSION

DPOAE can be used as a routine examination method in differential diagnosis of the post-traumatic hearing loss. It gives an objective and reliable diagnosis and differential diagnosis for the pseudohypacusis and exaggerated hearing loss.