What is the maximum flow setting for a nasal cannula providing oxygen therapy to an adult?

• A. 6 L/min
• B. 5 L/min
• C. 10 L/min
• D. 8 L/min

Answer: (A)

The maximum flow setting for a nasal cannula providing oxygen therapy to an adult is typically recognized as 6 liters per minute. At this flow rate, the nasal cannula can deliver a sufficient concentration of oxygen to the patient while ensuring comfort.

Flow rates higher than this can lead to discomfort, dryness of the nasal passages, and may not significantly increase the oxygen concentration being delivered to the patient. While some clinical guidelines may suggest that higher flow rates can be used, such as 10 liters per minute, this is generally more appropriate for specialized devices or circumstances beyond standard nasal cannula use. Hence, a flow setting of 6 liters per minute is fundamentally accepted as a safe maximum within standard practice for adults receiving oxygen therapy through a nasal cannula.