What is the recommended flow rate for oxygen delivery via a non-rebreather mask?

The recommended flow rate for oxygen delivery via a non-rebreather mask is typically set at 15 liters per minute. This high flow rate ensures that the mask can deliver a high concentration of oxygen to the patient, effectively preventing the residual air within the mask from diluting the oxygen being provided. The non-rebreather mask is designed to deliver oxygen concentration levels of approximately 60-100% when used correctly, and this requires sufficient flow to maintain that concentration, especially during inhalation.

By maintaining a flow rate of 15 L/min, the reservoir bag associated with the non-rebreather mask remains inflated, which is crucial as it provides a source of oxygen for the patient to draw from during inspiration. This flow rate is essential for patients who are in critical condition, such as those experiencing severe hypoxia or respiratory distress, and need immediate and effective oxygen therapy.

Lower flow rates, such as 10 L/min or 5 L/min, may not adequately fill the reservoir bag and can result in a lower effective oxygen concentration, compromising the patient's respiratory support. Using an excessively high flow rate, like 20 L/min, could waste oxygen without providing any additional benefit, as the mask design is optimized for 15 L/min under typical use scenarios