Fig. 2From: Comparison of upper airway patency in patients with mild obstructive sleep apnea during dexmedetomidine or propofol sedation: a prospective, randomized, controlled trialThe change of modified Observer’s Assessment of Alertness/Sedation (OAA/S) scale. A stable mid-modified OAA/S scales were presented at 30 min intervals. PACU, post-anesthetic care unitBack to article page