[The relationship between loudness recruitment phenomenon and distortim product otoacoustic emission and their clinical significance].
OBJECTIVE
To study the relationship between loudness recruitment and abnormal cochlear mechanism.


METHODS
The basic properties of input/output (I/O) of distortion product otoacoustic emission (DPOAE) in 20 normal subjects(40 ears) and 50 cases with cochlear deafness (63 ears) with positive recruitment were studied and analyzed.


RESULTS
Average slope of I/O at different frequencies in all deaf ears with recruitment was greater than those in the normal subjects with a statistical significance (P < 0.01). Moreover, thresholds of DPOAE in the recruitment positive ears were higher than those in normal subjects.


CONCLUSIONS
Loudness recruitment and abnormal cochlear active mechanism are specially related. I/O functions of DPOAE are more perceptive and precise to appraise cochlear active mechanism. It probably may become a valuable test for early diagnosis of cochlear deafness.
Cui
X
X
Teaching Hospital, Inner Mongolia Medical College, Huhehaoute 010050.
Jiang
S
S
Chen
H
H
D000293:Adolescent; D000328:Adult; D005260:Female; D006319:Hearing Loss, Sensorineural / Q000503:physiopathology*; D003639:Hearing Loss, Sudden / Q000503:physiopathology; D006801:Humans; D012001:Hyperacusis / Q000503:physiopathology*; D008297:Male; D008575:Meniere Disease / Q000503:physiopathology; D008875:Middle Aged; D017084:Otoacoustic Emissions, Spontaneous