When is it appropriate to use a nasal cannula for oxygen delivery?

Using a nasal cannula for oxygen delivery is particularly appropriate when a patient cannot tolerate a bag-valve-mask (BVM) or requires long-term oxygen therapy. The nasal cannula is a low-flow oxygen delivery device that allows for continuous oxygenation without the necessity of a more intrusive method. This method is beneficial for patients who are stable and breathing adequately, as it provides supplemental oxygen while allowing them to speak, eat, and move comfortably.

In situations where a BVM might cause discomfort or obstruction, such as in patients with facial injuries or those who are claustrophobic, utilizing a nasal cannula offers a less invasive alternative. Additionally, nasal cannulas are suitable for chronic conditions requiring ongoing oxygen support, as they can be used effectively in both home and clinical settings.

The other choices suggest situations where the use of a nasal cannula may not be ideal. For example, patients with pneumonia may require a higher concentration of oxygen than a nasal cannula can reliably provide. In emergency situations, while a nasal cannula can be used, it may not be the best first choice if the patient's oxygen saturation is critically low. Lastly, although conscious patients may benefit from a nasal cannula, it is not an exclusive criterion for its use, as the device