title: Duration criterion of respiratory events for children with obstructive sleep apnea.
abstract: OBJECTIVE
  To investigate the duration criterion of respiratory events in children with obstructive sleep apnea syndrome (OSAS) by analyzing standard nocturnal polysomnograms (PSG). To provide reference values for pediatric PSG.
  
  
  METHODS
  107 OSAS children diagnosed by PSG from January 2004 to May 2006 were randomly selected. The decrease in arterial oxygen saturation (ΔSaO2) and the corresponding event duration of each respiratory event were observed.
  
  
  RESULTS
  (1) There was significant positive correlation between oxygen desaturation values (ΔSaO2=0-17%) and the corresponding durations of respiratory events (P<0.001). (2) There was no significant difference in durations of respiratory events in rapid eye movement (REM) sleep and NREM sleep, the demographics between male and female children. (3) Significant positive correlation between age and duration of respiratory events (apnea/hypopnea) when oxygen desaturation values equal to 4% (ΔSaO2=4%) was observed. (4) The lower limit of 95% confidence intervals of which duration of oxygen desaturation value equals to 4% was 5.4s.
  
  
  CONCLUSIONS
  (1) PSG studies may allow the establishment of the duration criterion of significant respiratory events; (2) 5.4s can be defined as duration criteria of respiratory events; (3) the present study provides reference values for Pediatric PSG.
authors.affiliation: Beijing Key Laboratory for Pediatric Otolaryngology, Head and Neck Science, Department of Otolaryngology Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China.
authors.forename: Hongbin
authors.initials: H
authors.lastname: Li
authors.affiliation: Beijing Key Laboratory for Pediatric Otolaryngology, Head and Neck Science, Department of Otolaryngology Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China.
authors.forename: Wentong
authors.initials: W
authors.lastname: Ge
authors.affiliation: Beijing Key Laboratory for Pediatric Otolaryngology, Head and Neck Science, Department of Otolaryngology Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Tai
authors.affiliation: Beijing Key Laboratory for Pediatric Otolaryngology, Head and Neck Science, Department of Otolaryngology Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Department of Otolaryngology Head & Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China.
authors.forename: Xiaoyi
authors.initials: X
authors.lastname: Wang
authors.affiliation: Department of Otolaryngology, Beijing First Hospital of Integrated Chinese and Western Medicine, Beijing, China.
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Li
authors.affiliation: Beijing Key Laboratory for Pediatric Otolaryngology, Head and Neck Science, Department of Otolaryngology Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China. Electronic address: nixin@bch.com.cn.
authors.forename: Xin
authors.initials: X
authors.lastname: Ni
authors.affiliation: Department of Otolaryngology Head & Neck Surgery, Beijing Tsinghua Changgung Hospital, Beijing, China. Electronic address: yejingying@yeah.net.
authors.forename: Jingying
authors.initials: J
authors.lastname: Ye
mesh_terms: D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D010092:Oximetry; D017286:Polysomnography; D020181:Sleep Apnea, Obstructive / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D013997:Time Factors
keywords: Children; Obstructive sleep apnea syndrome; Oxygen desaturation; Polysomnography; Respiratory events