Final answer:
For a patient with viral pneumonia showing pulse ox readings between 79% and 88%, a non-rebreather mask is recommended to provide the highest oxygen concentration, monitored closely by a pulse oximeter to improve the percent saturation.
Step-by-step explanation:
A nurse caring for a client with viral pneumonia and pulse ox readings fluctuating between 79% and 88% should initiate an oxygen delivery system that provides the highest concentration of oxygen. To manage this, the nurse should utilize a non-rebreather mask, which can deliver up to 95-100% oxygen and is suitable for clients with severe hypoxemia. This high-flow system includes a reservoir bag attached to an oxygen mask, allowing the patient to inhale primarily oxygen.
It's essential to closely monitor the patient's oxygen levels with a pulse oximeter to ensure that the percent saturation improves and remains within a normal range. If the non-rebreather mask is insufficient, mechanical ventilation may be necessary.