Patients with OSA are at risk for airway obstruction (a condition that makes it difficult to breath) during sedation and anesthesia. Dexmedetomidine and propofol are safe and effective drugs regularly used by anesthesiologists. These drugs are used to put patients to sleep for operations and certain studies like MRI scans. However, there have been no studies describing the effects these drugs have on the upper airway of children, adolescents, and young adults with OSA.