A nonrebreather mask provides oxygen through two small prongs in the nostrils at one to six liters per minute. True or False?

• A. True
• B. False
• C. Not Applicable
• D. Sometimes

Answer: (B)

Different oxygen delivery devices have distinct configurations and flow ranges. A nonrebreather mask delivers high-concentration oxygen using a tight-fitting mask with a reservoir bag and one-way valves, typically at about 10–15 liters per minute to keep the bag inflated and provide near-100% oxygen. The description with two small prongs in the nostrils refers to a nasal cannula, which delivers oxygen at 1–6 liters per minute and produces a lower oxygen concentration. Because the device and its flow rate described do not match a nonrebreather mask, the statement is false.