What cues are typical of right lower lobe pneumonia?

• A. Diminished lung sounds, tachycardia, dullness and crackles
• B. Normal breath sounds with bradycardia
• C. Clear percussion and no crackles
• D. Bilateral wheezing with hyperresonance

Answer: (A)

A localized consolidation from right lower lobe pneumonia changes how the affected area of the lung sounds and feels on exam. When air-filled alveoli are filled with inflammatory exudate, the region becomes less aerated, leading to dullness to percussion and crackles as air moves through the fluid-filled tissue. Breath sounds over the involved lobe can be diminished because the consolidated tissue doesn’t transmit air the same way as normal aerated lung. At the same time, the infection provokes a systemic response, commonly causing tachycardia. Put together, these findings—diminished breath sounds over the right lower chest, dullness to percussion, crackles on auscultation, and tachycardia—form a typical picture of right lower lobe pneumonia.

Options suggesting normal breath sounds with bradycardia don’t fit because active pneumonia usually brings at least some abnormal breath sounds and, more often, a faster heart rate rather than slower. Clear percussion with no crackles argues against consolidation, which typically produces dullness and crackles. Bilateral wheezing with hyperresonance points to airway hyperreactivity or conditions like asthma or COPD with overinflation, not a focal lobar pneumonia.