Clinical Study Of Hearing Medicine Evaluate In Post-traumatic Hearing Loss

Objective:To study the expression of auditory using in clinical audiometry on post-traumatic hearing loss. Methods:92 posttraumatic patients (113 ears) complained hearing loss were treated by our hospital. They were examined by test of pure tone hearing threshold (PTHT), test of acoustic immittance (AI), test of 40Hz auditory event related potentials (40 Hz AERP), test of auditory brainstem response(ABR) and test of distortion product otoacoustic emission(DPOAE). Then the pure tone audiogram and DPOAE audiogram were drawn. Results:92 patients (113 ears) were examined by PTHT, AI , 40 Hz AERP,ABR and DPOAE. It was found that organic deafness was confirmed on 98 ears (86.73%), of which exaggerated hearing loss was 38 ears; nonorganic deafness was confirmed on 13 ears (11.50%)ï¼› stimulated deafness was 2 ears(1.77%). 98 organic deafness ears were diagnosed, of which conductive hearing loss was 25ears; sensorineural hearing loss was 29 ears, and mixed hearing loss was 44 ears. Compared the detected DPOAE rate and DPOAE amplitude at different frequencies between the post-traumatic hearing loss group and the normal contrast group. We found that there was a statistical significant difference. Moreover, DPOAE amplitudes were consistent with the pure tone audiogram. Conclusion:The pure tone audiometry is subjective audiometry. Acoustic immittance is objective audiometry of middle ear or hearing reflex arc. ABR is very sensitive to identify post-traumatic hearing loss, and can detect the injure of hearing system immediately. DPOAE has good frequent specificity. So it can respond the function state of the cochlea outer hair cells. Make up the multiple audiometry into a test battery. The test battery was valuable in evaluation of post-traumatic hearing loss, and can be used extensively as a tool to detect hearing loss.