What is the flow rate range for oxygen delivered via a nasal cannula?

The flow rate range for oxygen delivered via a nasal cannula is typically between 1 to 6 liters per minute. This range is effective for providing supplemental oxygen to patients while allowing for adequate humidification and comfort, as it delivers a lower concentration of oxygen that closely mimics normal breathing patterns.

At flow rates below 1 liter per minute, the delivery of oxygen becomes less effective, as the oxygen may not reach the nasal passages efficiently. If the flow rate exceeds 6 liters per minute, there is a risk of discomfort due to drying of the nasal mucosa and increased potential for nasal irritation or bleeding. Additionally, at higher flow rates, some of the oxygen delivered may not be effectively utilized due to turbulence and changes in airflow patterns.

The nasal cannula is especially beneficial for patients who require mild to moderate oxygen supplementation, making the identified range optimal for maintaining patient comfort and achieving desired clinical outcomes.