title: [Comparison between 226 Hz probe tone tympanometry and spiral CT test in infants].
abstract: OBJECTIVE
  To evaluate the diagnostic value of 226 Hz probe-tone tympanometry in infants with effusion in the middle ear.
  
  
  METHODS
  Fifty-two infants aged 3 to 7 months were recruited as clinical subjects in a hearing-ability screening program. After a spiral computerized tomography (CT) scan, we tested their hearing using tympanometry of 226 Hz probe-tone frequency. We recorded the tympanograms and compared the tympanometric results with CT to get the concordance rate between tympanometry and CT diagnose. The date was analyzed by the statistic software SPSS16.0.
  
  
  RESULTS
  One hundred and four ears in 52 patients,CT tests showed normal in 47 middle ears, but middle ear effusion in 57 ears. Among normal 47 ears,24 ears were type "A" (51.06%), 1 ear type "B" (2.13%), 1 ear type "C" (2.13%), 21 ears type "D" (44.68%); among 57 ears with effusion, 44 ears was type "A" (77.19%), 2 ears type "B"(3.51%0), 11 ears type "D" (19. 30%); 226 Hz probe tone tympanograms and CT test results were consistent with lower rate, kappa=0.103.
  
  
  CONCLUSIONS
  In clinical practice, 226 Hz tympanometry should not be recommended to determine the presence of middle ear fluid or not in infants younger than 7 months.
authors.affiliation: Department of Otolaryngology Head and Neck Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Zhiqi
authors.initials: Z
authors.lastname: Liu
authors.forename: Lisi
authors.initials: L
authors.lastname: Liu
authors.forename: Kun
authors.initials: K
authors.lastname: Yang
mesh_terms: D000158:Acoustic Impedance Tests / Q000379:methods*; D004432:Ear, Middle / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D010034:Otitis Media with Effusion / Q000175:diagnosis* / Q000000981:diagnostic imaging; D036542:Tomography, Spiral Computed