Question

With a non-rebreather a one-way valve on the mask and between the reservoir bag and the mask prevent the room air and the client's exhaled air from entering the bag so only the oxygen in the bag is inspired. To prevent carbon dioxide buildup, the nonbreather bag must not totally deflate during inspiration. If it does, the nurse can correct the problem by increasing the liter flow. True False

Answer 1

Ans) True

Explaination:

Non-rebreathing masks with O2 reservoir bags must be fed with an O2 flow exceeding the patient’s minute ventilation (>6–10 L/min.). If not, the amount of oxygen delivered will be too small to effectively increase the arterial O2 saturation.

- Moreover, the risk of CO2 rebreathing dramatically increases if the flow of oxygen to a non-rebreathing mask is lower than the minute ventilation, especially in patients with COPD and low tidal volumes.

- As a consequence, CO2 narcosis may develop. Non-rebreathing masks (with O2 reservoir bags) must be used cautiously by experienced medical staff and correctly with an appropriately high O2 flow of 10–15 L/min.