What is the primary purpose of obtaining a chest X-ray in COPD or asthma?

• A. Evaluate for CHF, pleural effusions, or lung cancer
• B. Determine COPD severity by airway resistance
• C. Screen for asthma triggers
• D. Confirm pulmonary embolism as the primary test

Answer: (B)

The main point is that a chest X-ray in COPD or asthma is used to look for other problems that could mimic or worsen respiratory symptoms and to catch complications, not to measure how severe the obstructive disease is. It helps identify things like congestive heart failure, pleural effusions, or a lung mass, which would change management. COPD severity and airway resistance aren’t determined on a chest X-ray; that relies on spirometry and lung function tests. Chest X-ray isn’t a tool for screening asthma triggers, and confirming pulmonary embolism isn’t done with a chest radiograph—it requires CT angiography or a V/Q scan. So the best-fitting purpose is to evaluate for CHF, pleural effusions, or lung cancer.