What do you need to ensure for a non-rebreather mask to function properly?

For a non-rebreather mask to function properly, it is essential that the bag is filled with air. This ensures that the patient can inhale a high concentration of oxygen, as the mask is designed to deliver nearly 100% oxygen by allowing stored oxygen in the reservoir bag to be used during inhalation. A filled bag indicates that there is enough oxygen available for the patient to breathe in deeply and effectively.

The non-rebreather mask features one-way valves that prevent exhaled air from entering the bag, which helps maintain the high concentration of oxygen. If the bag is not filled, it will not provide adequate oxygen, making it ineffective. Therefore, ensuring the bag is filled with oxygen before applying the mask is critical to its functionality and effectiveness in emergency situations where high-flow oxygen is needed.

In contrast, applying the mask improperly, maintaining low flow rates, or not covering the mouth and nose properly will compromise the mask's performance, making it unable to deliver the required oxygen concentration to the patient.