Which term describes squeaking or grating sounds of the pleural linings rubbing together?

• A. Friction Rub
• B. Wheezes
• C. Pleural Rub
• D. Rales

Answer: (C)

Squeaking or grating sounds from the pleural linings rubbing together come from pleural surfaces that are inflamed and rough, causing friction as the lungs move with breathing. This sound is described clinically as a pleural rub. It directly names the pleura involved, which is why it’s the best term for this finding. You’ll hear it as a coarse, scratchy effect during auscultation, typically best appreciated over the lower chest regions where the pleura is more exposed. It’s different from wheezes, which are musical sounds from narrowed airways, and from rales (crackles), which come from fluid or air movement in the small airways. So the pleural rub label precisely captures the crackling, squeaking friction between the inflamed pleural surfaces.