When is the use of a nonrebreathing mask or nasal cannula in a child appropriate?

Using a nonrebreathing mask or nasal cannula in a child is most appropriate when their tidal volume is adequate. Tidal volume refers to the amount of air that is inhaled or exhaled in each breath, and adequate tidal volume indicates that the child is able to ventilate effectively and has sufficient air exchange. The nonrebreathing mask is particularly useful for delivering high concentrations of oxygen to patients who are in respiratory distress or hypoxic but can still maintain sufficient tidal volume.

In situations where a child has inadequate tidal volume, such as in severe respiratory distress or failure, the mask may not be effective because it would not facilitate the necessary air movement required to ensure proper oxygenation. Therefore, confirming that the tidal volume is adequate supports the safe and effective use of these oxygen delivery devices.