[The study of distortion products otoacoustic emissions in pseudo-anacousia].
OBJECTIVE
To explore the technique that distinguish pseudo-anacousia.


METHODS
60 cases were divided into three groups (normal group, deafness sensorineura group and pretending hearing loss group). They all had been tested by distortion products otoacoustic emissions technique.


RESULTS
(1) The DPOAE incidence of normal group is 94.00%. the DPOAE incidence of deafness sensorineura group is 22.00%. There were significant differences at statistics in DPOAE incidence (P < 0.01). those proved that patients (deafness sensorineura group) were in hearing problem. (2) The DPOAE incidence of pretending hearing loss group is 93.00%, there were no significant differences at statistics in DPOAE incidence between normal group and pretending hearing loss group (P > 0.01), furthermore when behavior threshold is over 50 dBHL, DPOAE incidence is no score.


CONCLUSIONS
This study shows the technique can distinguish pretending hearing loss. The application of DPOAE can be used as a new tool in cases assessment of clinic forensic medicine.
Beijing Institute of Forensic Medicine & Science, Beijing 100040.
Yan
Y
Wang
D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D003638:Deafness / Q000175:diagnosis* / Q000503:physiopathology; D003937:Diagnosis, Differential; D016057:Evoked Potentials, Auditory, Brain Stem; D005554:Forensic Medicine; D006319:Hearing Loss, Sensorineural / Q000175:diagnosis / Q000503:physiopathology; D006801:Humans; D017084:Otoacoustic Emissions, Spontaneous