Consider nasogastric or orogastric tube
Position patient to gain access to their mouth (usually flat on their back unless specific reason - mediastinal mass, wound, trauma, etc)
Patient unconscious?
Nasopharyngeal airway
Oral airway
>1 airway provider?
Immobilize c-spine with collar or manual in-line positioning
Obtain the smallest mask that covers the mouth and nose without covering the eyes or hanging over the chin
Severe abdominal distension?
Possible c-spine injury?
Adequate chest rise?
Attempt to trouble-shoot potential problems
Potential problems
Consider definitive airway intervention
Consider other airway device or consult advanced airway provider
Optimize airway positioning (chin lift, jaw thrust, etc.)
Select bag type and attach 100% oxygen source
Two-hand mask technique
Determine ventilation rate and volume and begin
Benefit from airway adjunct?
One-hand mask technique