Which flow rate is appropriate when using a nasal cannula?

Which flow rate is appropriate when using a nasal cannula?

• A. 1-6 LPM
• B. 2-10 LPM
• C. 4-8 LPM
• D. 12-15 LPM

Answer: (A)

Using a nasal cannula, the appropriate flow rate is 1-6 liters per minute. This device is designed for low-to-moderate oxygen delivery; the oxygen concentration delivered increases as the flow is raised, but only up to about 6 L/min because beyond that the prongs don’t seal and room air mixes in, reducing the effective FiO2 and potentially causing nasal dryness and discomfort. Higher flow rates (such as 12-15 L/min or 8-10 L/min) exceed what a standard nasal cannula can reliably deliver and typically require a different delivery method to achieve higher oxygen concentrations.

Using a nasal cannula, the appropriate flow rate is 1-6 liters per minute. This device is designed for low-to-moderate oxygen delivery; the oxygen concentration delivered increases as the flow is raised, but only up to about 6 L/min because beyond that the prongs don’t seal and room air mixes in, reducing the effective FiO2 and potentially causing nasal dryness and discomfort. Higher flow rates (such as 12-15 L/min or 8-10 L/min) exceed what a standard nasal cannula can reliably deliver and typically require a different delivery method to achieve higher oxygen concentrations.