Adult surgical patients were enrolled. Following anesthesia induction and muscle relaxation, direct laryngoscopy was performed as usual and airway characteristics noted. Patients were randomly assigned to tracheal intubation by either the Airway Scope (n=50) or the Macintosh laryngoscope (n=50). Intubation was performed from a table positioned at the height as the operating table, thus simulating intubating on the ground. Overall intubation success rate, time required for intubation, the number of attempts required for successful intubation, and airway complications related to intubation were recorded.