What is the flow rate and oxygen delivery percentage for a partial non-rebreather mask?

The flow rate and oxygen delivery percentage for a partial non-rebreather mask typically fall within the range of 6-10 liters per minute, delivering approximately 35-60% oxygen concentration. This type of mask is designed to allow for some rebreathing of exhaled air while primarily providing supplemental oxygen. It incorporates a reservoir bag that fills with oxygen and allows the patient to inhale a combination of this supplemental oxygen and some of their own exhaled air, which helps improve oxygenation compared to a simple mask.

This design is particularly effective in situations where patients need a higher level of oxygen than what is delivered through a nasal cannula or simple face mask, but not as high as the nearly pure oxygen provided by a full non-rebreather mask. Using the partial non-rebreather mask at the indicated flow rates ensures adequate oxygen delivery while minimizing the risk of CO2 retention.