Epiglottitis
Significant midface fractures
Basilar skull fractures
Large<unk>  masses<unk>  foreign body
Recent<unk>  instrumentation<unk>  or upper airway hematoma/infection
Epistaxis
Nasal intubation
Blind digital intubation
Awake intubation
Needle cricothyrotomy
Bag valve mask ventilation
Surgical cricothyrotomy
Direct laryngoscopy
Advanced airway adjuncts