// EMT Question · Airway, Respiration & Ventilation
A patient is on a 15 L/min non-rebreather mask. The reservoir bag should be:
A. Empty at the start of inspiration
B. At least one-third full during inspirationCorrect
C. Completely full at all times
D. Removed to prevent barotrauma
// Rationale
A reservoir bag that remains at least one-third full ensures high oxygen concentration delivery.