See Predicting the difficult airway
Mask seal
Obesity
Aged
No teeth
Stiffness (resistance to ventilation)
Look externally (gestalt)
Evaluate 3-3-2 rule
Mallampati
Obstruction
Neck mobility
Intubation
Extubation
Rapid sequence intubation
Awake intubation
Delayed sequence intubation
Extracorporeal membrane oxygenation
Blind digital intubation
Emergent delivery