A client with pneumonia requires oxygen therapy. Which oxygen delivery system would be most appropriate for this client to improve oxygenation and reduce the work of breathing?

Explanation: The Venturi mask is the most appropriate oxygen delivery system for clients with COPD as it provides a precise and controlled oxygen concentration. This system allows for a specific amount of room air to mix with oxygen, ensuring a precise oxygen level is delivered without the risk of excessive oxygen concentration.

Incorrect choices: a. Nasal cannula delivers a lower oxygen concentration and may not provide sufficient oxygen for clients with severe COPD.

c. Non-rebreather mask delivers a high concentration of oxygen, which can potentially worsen the client's condition by reducing respiratory drive.

d. Oxygen tent is not commonly used in COPD management and is typically reserved for pediatric clients or those with specific respiratory conditions.

Answer: d. High-flow nasal cannula

Explanation: High-flow nasal cannula is effective in delivering precise oxygen concentrations and provides consistent oxygenation for clients with severe hypoxemia.

Incorrect choices: a. Simple face mask, non-rebreather mask, and partial rebreather mask do not provide precise control over oxygen concentrations and may not be as effective in delivering accurate oxygenation in severe hypoxemia.