You are in Medical Library .
Traumatic pneumothorax occurs when a physical injury causes the lung to collapse.
High risk medical procedures include transbronchial biopsy , pleural biopsy , thoracentesis , chest tube placement, intracostal needle anesthesia, and esophagoscopy. The incidence is 3 out of 1,000 people. Signs And Tests Listening to the chest with a stethoscope reveals decreased breath sounds . There may be a bluish coloration of the skin caused by lack of oxygen. The affected person may have a rapid heart rate .