In pneumothorax, which of the following physical examination findings is correct: A) dullness or hypodullness on percussion, B) increased vocal fremitus, C) absent breath sounds, D) wet rales, or E) dry rales?

Pneumothorax Physical Examination Findings

Pneumothorax classically produces decreased or absent breath sounds over the affected hemithorax. [1] The associated percussion finding is classically hyperresonance rather than dullness or hypodullness. [1] Vocal (or tactile) fremitus is classically decreased rather than increased. [1, 2]

Percussion Findings

Pneumothorax classically causes hyperresonance to percussion on the affected side. [1, 3] Dullness or hypodullness on percussion is not a typical finding for pneumothorax. [1, 3]

Vocal Fremitus Findings

Pneumothorax classically causes decreased tactile/vocal fremitus due to interposed pleural air disrupting sound transmission. [1, 4] Increased vocal fremitus is not typical for pneumothorax. [2, 4]

Auscultation Findings

Pneumothorax classically causes decreased or absent breath sounds over the affected side. [1, 3] Wet rales are not characteristic of pneumothorax. [3] Dry rales are not characteristic of pneumothorax. [3]

Correct Answer

C) absent breath sounds is the correct physical examination finding for pneumothorax. [1, 3]