Which feature is classically associated with COPD on physical examination?

• A. No breath sounds
• B. Convex nails
• C. Barrel-chest shape
• D. Hyperactive reflexes

Answer: (C)

Chronic obstructive pulmonary disease causes air trapping and lung hyperinflation, which over time enlarges the chest from front to back and side to side, giving a barrel-shaped appearance. This increased anteroposterior diameter is the classic physical examination sign in COPD. You’ll often see an extended expiratory phase, use of accessory muscles, and relatively quiet breath sounds because the overinflated lungs reduce the transmission of air sounds.

The other options don’t fit COPD’s typical exam profile. Absence of breath sounds suggests a dramatic space-occupying issue like a pneumothorax or large effusion rather than COPD. Clubbing of nails isn’t a hallmark of COPD and points toward other chronic lung diseases or conditions. Hyperactive reflexes are a neurological finding, not related to the lung hyperinflation and airflow limitation seen in COPD.

So, the barrel-shaped chest is the best-supported exam feature for COPD.