PMC3986113_01
Overnight polysomnogram.. Notes: This summary displays a sleep stage hypnogram, oxygen saturation during the study, apnea and hyponea events, and positive airway pressure settings. Note the continued oxygen desaturations associated with REM despite reduction in apnea and hypopnea events (the gray line indicates 88% saturation).. Abbreviations: REM, rapid eye movement; N1, Sleep Stage 1; N2, Sleep Stage 2; N3, Slow wave Sleep; OA, obstructive apnea; MA, mixed apnea; CA, central apnea; H, hypopnea.
copd-9-349Fig5.jpg
PMC3986113_01_copd-9-349Fig5.jpg
f5-copd-9-349
A polysomnogram was performed and showed evidence of OSA with significant desaturations as depicted in Figure 5.