The causes of subcutaneous crepitus usually involve conditions that cause subcutaneous emphysema (i.e., air present in the tissues in the skin), like a pneumothorax ( i.e., collapsed lung) or a rupture or tear in the airway or esophagus (i.e., the tube that transports food from the mouth to the stomach).Ĭrepitus can also be heard in individuals who are on mechanical ventilation, a machine that helps with breathing this would occur if air is present in the mediastinum (i.e., area of the chest that contains the heart) after escaping from the lungs. Join millions of students and clinicians who learn by Osmosis! Start Your Free Trial What causes crepitus from the lungs?
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