Answer: c. High-flow nasal cannula
Explanation: High-flow nasal cannula delivers a high flow rate of humidified oxygen and provides consistent oxygenation while reducing the work of breathing. It is effective in improving oxygenation in clients with pneumonia.
Incorrect choices: a. Simple face mask does not provide precise oxygen concentrations and may not be as effective in improving oxygenation as other options.
b. Partial rebreather mask is not typically used in pneumonia management as it may impede effective coughing and clearance of secretions.
d. Transtracheal catheter is a more invasive oxygen delivery method and is not commonly used in pneumonia management.