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1. to move something over a surface with friction.
2. the action of such movement.
friction rub an auscultatory sound caused by the rubbing together of two serous surfaces, as in pericardial rub; called also rub.
pericardial rub (pericardial friction rub) a scraping or grating noise heard with the heart beat, usually a to-and-fro sound, associated with an inflamed pericardium. Patients often complain of pleuritic discomfort that radiates in the chest, especially during inhalation. This condition must be distinguished from angina pectoris.
pleural rub (pleuritic rub) a friction rub caused by friction between the visceral and costal pleurae.
friction sound caused by the rubbing together of the roughened surfaces of the costal and visceral pleurae.
Synonym(s): pleural rale
pleural rubA friction (grating) sound heard by a stethoscope during inspiration and expiration in patients with pleuritis, due to the rubbing of the visceral and parietal pleurae.
Pleuritis, pneumonia, pulmonary embolism.
pleural rubPhysical exam A friction sound heard during breathing in Pts with peuritis, due to the rubbing of the visceral and parietal pleurae
pleur·al rub(plūrăl rŭb)
Friction sound caused by the rubbing together of the roughened surfaces of the costal and visceral pleurae.