title: [The relationship between loudness recruitment phenomenon and distortim product otoacoustic emission and their clinical significance].
abstract: 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.
authors.affiliation: Teaching Hospital, Inner Mongolia Medical College, Huhehaoute 010050.
authors.forename: X
authors.initials: X
authors.lastname: Cui
authors.forename: S
authors.initials: S
authors.lastname: Jiang
authors.forename: H
authors.initials: H
authors.lastname: Chen
mesh_terms: 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