What is the oxygen flow range for a nasal cannula?

What is the oxygen flow range for a nasal cannula?

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

Answer: (B)

Delivering oxygen through a nasal cannula is a low-flow method, suited for modest increases in oxygen, not high-demand needs. The device works best within a flow range of about 2 to 6 liters per minute. Sending oxygen at these flows raises the amount the patient inhales in a gradual, comfortable way and provides a reasonable increase in inspired oxygen without the hydrating drawbacks and inefficiency that occur at higher rates. Pushing beyond about 6 L/min through a cannula isn’t practical, as the nasal passages can’t effectively utilize that much oxygen, and drying of the nares becomes a concern. For higher oxygen demands, other devices like masks or Venturi setups are used.

Delivering oxygen through a nasal cannula is a low-flow method, suited for modest increases in oxygen, not high-demand needs. The device works best within a flow range of about 2 to 6 liters per minute. Sending oxygen at these flows raises the amount the patient inhales in a gradual, comfortable way and provides a reasonable increase in inspired oxygen without the hydrating drawbacks and inefficiency that occur at higher rates. Pushing beyond about 6 L/min through a cannula isn’t practical, as the nasal passages can’t effectively utilize that much oxygen, and drying of the nares becomes a concern. For higher oxygen demands, other devices like masks or Venturi setups are used.