A patient in respiratory distress enters the emergency department. The patient denies a history of COPD. The nurse anticipates an order for oxygen delivered by which method to achieve the highest possible concentration of oxygen?
a. Simple face mask at 15 L/min
b. Nonrebreathing face mask at 15 L/min
c. Venturi mask at 15 L/min
d. Oxygen tent at 15 L/min
B
When used as a nonrebreather, the face mask with a reservoir bag delivers 60% to 90% oxygen at 15 L/min. The simple face mask delivers oxygen concentrations from 40% to 60% when set at 5 to 8 L/min. It is not used at 15 L/min. A Venturi mask delivers oxygen concentrations from 24% to 60% when set at 4 to 12 L/min. It is not used at 15 L/min. An oxygen tent is usually for pediatric use and delivers up to 50% oxygen concentration at 10 to 15 L/min.
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