A comparison of polysomnography and the WatchPAT in the diagnosis of obstructive sleep apnea.
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.
Pang
Kenny P
KP
Pacific Sleep Centre, Singapore, Republic of Singapore. kennypang@hotmail.com
Gourin
Christine G
CG
Terris
David J
DJ
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
D010100:Oxygen