title: [Relationship between childhood obstructive sleep apnea-hypopnea syndrome and tympanogram].
abstract: OBJECTIVE
  To explore the correlation between childhood obstructive sleep apnea-hypopnea syndrome and tympanogram.
  
  
  METHODS
  A prospective clinical study was carried out. Polysomnography and tympanogram were analyzed in 72 cases.
  
  
  RESULTS
  Among the 144 ears 37 ears had type C or B tympanogram. There was no correlation between tympanogram and LSaO2. It was found correlation between tympanogram and AHI (P < 0.05).
  
  
  CONCLUSIONS
  Hypoxemia may affect middle-ear function. It was necessary to do the examination of acoustic impedance routinely in children with moderate and severe OSAHS.
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, the Second Affiliated Hospital of Sun-Yat-Sen University, Guangzhou, 510120, China. excitehxz@yahoo.com.cn
authors.forename: Xiaozheng
authors.initials: X
authors.lastname: He
authors.forename: Yaodong
authors.initials: Y
authors.lastname: Xu
authors.forename: Xiangfeng
authors.initials: X
authors.lastname: Liang
authors.forename: Ling
authors.initials: L
authors.lastname: Chen
authors.forename: Xianghui
authors.initials: X
authors.lastname: Li
authors.forename: Zeheng
authors.initials: Z
authors.lastname: Qiu
mesh_terms: D000158:Acoustic Impedance Tests; D002648:Child; D002675:Child, Preschool; D004432:Ear, Middle / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D011446:Prospective Studies; D020181:Sleep Apnea, Obstructive / Q000503:physiopathology*