title: [Distortion product otoacoustic emissions results in children with middle ear effusion].
abstract: OBJECTIVE
  To evaluate the role of distortion product otoacoustic emissions (DPOAE) results in children with middle-ear effusion before and after ventilation tube insertion.
  
  
  METHODS
  The study was conducted between the September 2007 and May 2008 at the Otolaryngology Clinic diagnosed with middle-ear effusion. A prospective study was carried out 30 patient (18 males, 12 females; mean age 8.6 years; range 6 to 15 years) and a total of 41 ears with middle-ear effusion. A total of 30 ears of 15 volunteers healthy control group (8 males, 7 females; mean age 7.8 years; range 5 to 15) included in the study. All children listed for appropriate surgery had a pre- and postoperative (four week after) tympanometry, pure tone audiometry and DPOAE recorded. A comparison was made between control group DPOAE value and pre- and postoperative DPOAE value of patient.
  
  
  RESULTS
  Preoperatively, 41 ears had an abnormal tympanometry of which 80% had absent DPOAE. After four week all postoperative patients with surgery had 92.6% a normal DPOAE. Control group of 29/30 ears had a normal (96.7%) DPOAE.
  
  
  CONCLUSIONS
  Patients with otitis media with effusion measured preoperative DPOAE, postoperative after one month all patients with grommets had a more DPOAE value comparison with preoperative, but less for control group.
authors.affiliation: Department of Otolaryngology, Haseki Training and Research Hospital, Istanbul, Turkey.
authors.forename: Fadlullah
authors.initials: F
authors.lastname: Aksoy
authors.forename: Yavuz Selim
authors.initials: YS
authors.lastname: Yildirim
authors.forename: Bayram
authors.initials: B
authors.lastname: Veyseller
authors.forename: Hasan
authors.initials: H
authors.lastname: Demirhan
authors.forename: Orhan
authors.initials: O
authors.lastname: Ozturan
mesh_terms: D000158:Acoustic Impedance Tests / Q000379:methods; D000293:Adolescent; D001299:Audiometry / Q000379:methods; D002648:Child; D002675:Child, Preschool; D005260:Female; D006311:Hearing Disorders / Q000209:etiology*; D006801:Humans; D008297:Male; D010034:Otitis Media with Effusion / Q000503:physiopathology / Q000601:surgery*; D016896:Treatment Outcome