title: Sleep-disordered breathing in children with Down syndrome: Usefulness of home polysomnography.
abstract: OBJECTIVE
  To investigate the technical feasibility of unattended home polysomnography (HPSG) in children with Down syndrome.
  
  
  METHODS
  Data from children with Down syndrome under 10 years of age referred to a diagnostic sleep study was analyzed. A full sleep-lab based polysomnography (PSG) or a HPSG with a portable device was performed. Uninterpretable HPSGs were defined as: recordings with (i) loss of ≥2 of the following channels: nasal flow, or thoracoabdominal sensors, or (ii) HPSG with less than 4h of artifact-free recording time or (iii) less than 4h SpO2 (peripheral capillary oxygen saturation) signal.
  
  
  RESULTS
  A total of 44 children (68% males) were included in the study, with a mean age of 3.6 (0.1-10) years. PSG was performed in 8 cases and HPSG in 36 cases. Six HPSG recordings were classified as uninterpretable and had to be repeated. Age, gender and BMI were no significant predictors of uninterpretability of the HPSG. Obstructive sleep apnea (OSA) was present in 61% (n=27) of all subjects, and classified as mild, moderate, and severe in 43% (n=19), 11% (n=5), and 7% (n=3) of cases, respectively. Interpretable and technically acceptable HPSGs were obtained in 30 subjects (83%). Age, gender and BMI were no significant predictors for interpretability of the HPSG.
  
  
  CONCLUSIONS
  This study demonstrates that a portable polysomnographic home device may be helpful for diagnosing OSA in children with Down syndrome. Considering the potential consequences of untreated OSA, this screening test may be helpful for early diagnosis of OSA in children with Down syndrome.
authors.affiliation: Department of Pediatric Cardiology and Pulmonology, Division of Pediatrics, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile; Sleep Medicine Center, Department of Neurology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile. Electronic address: pbrockmann@med.puc.cl.
authors.forename: Pablo E
authors.initials: PE
authors.lastname: Brockmann
authors.affiliation: School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
authors.forename: Felipe
authors.initials: F
authors.lastname: Damiani
authors.affiliation: School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
authors.forename: Felipe
authors.initials: F
authors.lastname: Nuñez
authors.affiliation: Department of Pediatric Cardiology and Pulmonology, Division of Pediatrics, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
authors.forename: Ana
authors.initials: A
authors.lastname: Moya
authors.affiliation: Sleep Medicine Center, Department of Neurology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Pincheira
authors.affiliation: Division of Pediatrics, School of Medicine, Pontificia Universidad Catolica de Chile, Santigo, Chile.
authors.forename: Maria A
authors.initials: MA
authors.lastname: Paul
authors.affiliation: Down Syndrome Center, Pontificia Universidad Católica de Chile, Santiago, Chile.
authors.forename: Macarena
authors.initials: M
authors.lastname: Lizama
mesh_terms: D002648:Child; D002675:Child, Preschool; D004314:Down Syndrome / Q000150:complications*; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D017286:Polysomnography / Q000379:methods*; D012890:Sleep; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis / Q000209:etiology*
keywords: Apnea; Diagnostic; Down syndrome; Polysomnography; Snoring; Trisomy 21