What nursing intervention is key when caring for a client with a respiratory infection?

Encouraging increased fluid intake is crucial when caring for a client with a respiratory infection for several reasons. First, adequate hydration helps thin mucus secretions, making it easier for the patient to expectorate and clear their airways. This is particularly important in conditions like bronchitis or pneumonia, where mucus buildup can obstruct airflow and cause further complications.

Additionally, increased fluid intake supports overall body function and immune response. Hydration plays a vital role in maintaining optimal organ function, including the lungs, and helps the body combat infection more effectively. It can also assist in preventing dehydration, which can occur due to fever or excessive respiratory secretions.

While the other options may have their own importance in specific contexts, they do not address the immediate needs of improving respiratory function and overall health in the case of respiratory infections as directly as increasing fluid intake does.