What oxygen delivery method is most appropriate for the initial therapy of a patient in respiratory distress?

The most appropriate method for the initial therapy of a patient in respiratory distress is oxygen via non-rebreather mask at 15 L/min. This delivery system provides a high concentration of oxygen, typically around 80-100%, which is crucial for a patient experiencing respiratory distress. The non-rebreather mask has a reservoir bag that allows for the accumulation of oxygen, ensuring that the patient inhales a high percentage of oxygen with each breath, while also minimizing the amount of room air being mixed in.

In situations of respiratory distress, it is essential to quickly optimize oxygen saturation levels to prevent hypoxia and ensure the body receives adequate oxygenation. The rapid delivery capability of a non-rebreather mask, combined with its high oxygen concentration, makes it the best choice for initial intervention in acute settings. This contrasts with other methods, which provide lower concentrations or slower delivery rates.

For example, oxygen via face mask at 10 L/min may not provide the same high concentration of oxygen effectively due to the mixing of ambient air. The nasal cannula at 2 L/min delivers a lower concentration of oxygen, which might be insufficient for patients in more severe distress. An air entrainment mask at 28% is designed for precision but would not deliver the