Study Status: Completed
Recruit Status: Completed
Study Type: Interventional
Official Title: Effect of Continuous Positive Airway Pressure Ventilation Through Nasal Mask on Upper Airway Patency During Induction of Anesthesia
Brief Summary: Upper airway obstruction (UAO) is common complication during induction of general anesthesia. The mechanism of UAO during anesthesia has not been well understood. Posterior displacement of soft palate are believed to be the primary contributing factors. The mechanism of UAO during anesthesia share many similarities with obstructive sleep apnea (OSA). Since nasal continuous positive airway pressure (nCPAP) can maintain the airway patent in patients with OSA, the investigators hypothesize that nCPAP during induction of anesthesia will reduce the incidence and severity of UAO.