title: [An analysis of tympanometry in 0-1 year old infants].
abstract: OBJECTIVE
  To study the characteristics of infants middle ear function of children (0-1 year old) with 226 Hz, 1000 Hz tympanometry.
  
  
  METHODS
  Tympanometric data using 226 Hz, 1 000 Hz probe tones were gained from 150 children (300 ears) aged 0-1 year old with a GSI tympstar middle ear analyzer. All of them were term birth, divided into 5 groups of 30 patients, the neonatal period (0-28 days), 6 weeks (+/- 3 days), 3 months (+/- 6 d), 6 months (+/- 6 days), 7-12 months. To analyse the middle ear function of children with 226 Hz, 1000 Hz tympanometric data.
  
  
  RESULTS
  226 Hz,1000 Hz probe tone tympanometric data were normal for the normal group, which respectively were: 76.7%, 80%, 86.7%, 90%, 93.3%. 226 Hz, 1000 Hz detection tympanometric data were not sound normal to abnormal group, the proportion in each group were: 13.3%, 8.3%, 5.0%, 3.3%, 1.6%. The contradiction between the two groups were divided into two subgroups: 226 Hz normal, 1000 Hz unusual in the proportion of each group were 6.7%, 6.7%, 5.0%, 3.3%, 1.6%; 1000 Hz normal, 226 Hz unusual in the proportion of each group were 5.0%, 5.0%, 3.3%, 3.3%, 3.3%.
  
  
  CONCLUSIONS
  The sensitivity and specificity of the 1000 Hz probe tone tympanometry was better.
authors: Department of Otorhinolaryngology, Guangzhou Women and Children's Medical Center, Guangzhou, 510120, China.
authors: Yan
authors: Y
authors: Li
authors: Runjin
authors: R
authors: Wen
authors: Xiaoya
authors: X
authors: Wang
authors: Renzhong
authors: R
authors: Luo
mesh_terms: D000158:Acoustic Impedance Tests; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D012680:Sensitivity and Specificity