[Application of auditory brainstem response and distortion product otoacoustic emission in the clinical detection of hearing loss in patients with diabetes mellitus].
OBJECTIVE
To study the characteristic of hearing loss and the changes of the auditory brainstem response and distortion product otoacoustic emission in diabetics.


METHODS
General information of 136 diabetics were investigated whether had the complication of capillary vessel and hearing loss with self-made questionnaire at random. 136 cases (272 ears) were tested with ABR and DPOAE. They were divided into A, B, C, D four groups according to the age of per ten years (30-70 years). Other 120 (240 ears) matched healthy adult were enrolled in the control group. The pure tone threshold (PTT), acoustic impedance, ABR and DPOAE results were compared between the four groups and the control group, and then made statistical analysis.


RESULTS
When comparing to the control group, the interpeak latency I-V and ABR response were no significant difference between patients at the stage of 30 years. Not only the threshold of wave V was elevated with aging in patients over 40 years, but the amplitude of the peak latencies of waves III and V were lessening, and the interpeak latency III-V and I-V were prolonged between patients at the stage of 60 years, which had significant difference compared with age-matched patients (P < 0.05). The inducing rate of DPOAE were 100% in the test and control group, but the amplitude of DPOAE declined ranged from 1 to 8 kHz in patients with early diabetes mellitus and were significantly reduced at 4 kHz, which had significant difference compared with age-matched patients (P < 0.05).


CONCLUSIONS
The majority of patients with diabetes mellitus had slight and moderate hearing loss gradually. The ABR and the threshold of ABR response were varied with the age and sex of patients, and whether had the complication of capillary vessel, but were not related to its type and disease course. The DPOAE can comprehend the cochlear disorder in patients with early diabetes mellitus.
Li
Juan
J
Department of Otolaryngology, the Fifth Hospital, Fudan University, Shanghai, China. juanli2222@126.com
Zhang
Tianyu
T
Shen
Jianzhong
J
Gong
Jingrong
J
Zhu
Jingyan
J
Wang
Hongli
H
Zhou
Yang
Y
D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D003920:Diabetes Mellitus / Q000503:physiopathology*; D016057:Evoked Potentials, Auditory, Brain Stem; D005260:Female; D034381:Hearing Loss / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D017084:Otoacoustic Emissions, Spontaneous