The nurse is caring for a patient with pneumonia. Which laboratory test would best help the nurse to monitor the condition of this patient?

A. Crackles are heard in bases. – The nurse encourages the client to cough forcefully:
Crackles are caused by fluid in the alveoli and are often not cleared with coughing. Encouraging coughing may help with mucus, but for fluid-related crackles (e.g., in heart failure), diuretics or other interventions are more appropriate.

B. Wheezes are heard in central areas. – The nurse administers an inhaled bronchodilator:Wheezes result from narrowed airways, commonly seen in asthma or bronchospasm. Bronchodilators relax airway smooth muscle, improving airflow and reducing wheezing.

C. Vesicular sounds are heard over the periphery. – The nurse has the client breathe:
Vesicular breath sounds are normal over the peripheral lung fields. No action is needed when these sounds are heard, so prompting the client to breathe differently is unnecessary.

D. Hollow sounds are heard over the trachea. – The nurse increases the oxygen flow rate:Hollow, tubular sounds (bronchial) are expected over the trachea. These are normal findings and not an indication of hypoxia. Increasing oxygen unnecessarily could be harmful.

A. A venturi mask: The Venturi mask is often used in patients with COPD. However, it may cause dryness and irritation in the nasal passages and sinuses due to non-humidified, high-flow delivery, which could aggravate existing sinus conditions.

B. A nasal cannula: While nasal cannulas are less drying than masks and suitable for low-flow oxygen delivery, they can still cause mucosal dryness when used without humidification, particularly in patients with sinus issues.

C. High-flow oxygen via nasal cannula: High-flow nasal cannula therapy provides warmed, humidified oxygen, but at higher rates than needed for most patients starting oxygen therapy. It is more appropriate for acute respiratory failure than for routine use in sinus conditions.

D. Adding humidification to the oxygen setup: Humidifying oxygen helps prevent nasal and sinus mucosal dryness and irritation, making it beneficial for patients with sinus disorders. Moisture improves comfort and protects the integrity of the upper airway mucosa during oxygen therapy.