Successful surgery is built on a foundation of airway management. While each of surgery's moving parts plays a critical role in a procedure, difficulties faced in establishing a patient's airway can stop it at square one. It's been reported that one in every 2,230 anesthetic administrations involves a failed intubation, but in many cases you can anticipate a difficult airway. Here's what a thorough pre-op evaluation should include to reduce the likelihood of airway trouble.