A pleural rub is also known as a pleural friction rub. It occurs when the pleural layers have lost their lubrication due to inflammation. The pleural linings rub together and produce some squeaking or grating sounds, that called pleural rubs.
Pleural rubs often appear in the people with pneumonia, pulmonary embolism, and pleurisy. When these people are inhaling or exhaling, the pleural rub can be heard by using a stethoscope on their lungs.
Keywords: pleural rub; pleural friction rub