In which scenario would a PCP use a non-rebreather mask?

A non-rebreather mask is specifically designed to provide high concentrations of oxygen to patients who are experiencing significant respiratory distress or hypoxia. It has one-way valves that prevent exhaled air from mixing with the oxygen supply, allowing the patient to receive nearly 100% oxygen, which is crucial in situations where they may be unable to adequately oxygenate their blood due to conditions like severe asthma, COPD exacerbations, pneumonia, or cardiogenic shock.

In contrast, the other scenarios involve conditions that do not typically require the immediate and concentrated oxygen delivery that a non-rebreather mask provides. For example, patients with nasal congestion may not need such an intervention, as their issue may be more related to airway patency rather than a lack of oxygen. Patients recovering from surgery might require supplemental oxygen, but usually a lower flow rate or a different method of oxygen delivery would suffice. Similarly, patients with allergies could experience respiratory symptoms but do not always require high-flow oxygen unless they are showing signs of significant hypoxia or distress.