title: A comparison of polysomnography and the WatchPAT in the diagnosis of obstructive sleep apnea.
abstract: OBJECTIVE
  Our goal was to validate the WatchPAT in the diagnosis of obstructive sleep apnea.
  
  
  METHODS
  We conducted a prospective, blinded, nonrandomized clinical trial.
  
  
  METHODS
  Patients with suspected obstructive sleep apnea scheduled for an overnight level I polysomnogram were offered enrollment in a study to compare the WatchPAT (Itamar Ltd, Israel) device with polysomnography. Patients wore the WatchPAT device simultaneously while undergoing polysomnography during evaluation in the sleep lab.
  
  
  RESULTS
  Thirty-seven patients participated in the study. They had a mean age of 50.1 years (range, 31-73 years) and mean body mass index of 34.6 kg/m(2) (range, 21.2-46.8 kg/m(2)). There was high correlation between the polysomnogram and WatchPAT apnea-hypopnea index (r = 0.9288; 95% confidence interval = 0.8579-0.9650, P < 0.0001). The lowest oxygen saturation also showed high correlation (r = 0.989; 95% confidence interval = 0.9773-0.9947, P < 0.0001). The overall polysomnogram and WatchPAT sleep times revealed a correlation of r = 0.5815 (P = 0.005).
  
  
  CONCLUSIONS
  The WatchPAT showed a high correlation with the polysomnogram in apnea-hypopnea index, lowest oxygen saturation, and sleep time.
  
  
  CONCLUSIONS
  It's use as a reliable tool in the diagnosis of Obstructive Sleep Apnea.
authors: Pacific Sleep Centre, Singapore, Republic of Singapore. kennypang@hotmail.com
authors: Kenny P
authors: KP
authors: Pang
authors: Christine G
authors: CG
authors: Gourin
authors: David J
authors: DJ
authors: Terris
mesh_terms: D000328:Adult; D000368:Aged; D015992:Body Mass Index; D005260:Female; D006801:Humans; D008297:Male; D008365:Manometry; D008875:Middle Aged; D018670:Monitoring, Ambulatory / Q000295:instrumentation / Q000379:methods*; D010100:Oxygen / Q000097:blood; D017286:Polysomnography / Q000379:methods*; D011446:Prospective Studies; D011673:Pulsatile Flow / Q000502:physiology; D016037:Single-Blind Method; D012890:Sleep / Q000502:physiology; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis*; D012895:Sleep, REM / Q000502:physiology; D013997:Time Factors; D014851:Wakefulness / Q000502:physiology
chemical_list: D010100:Oxygen