RT Book, Section A1 Cadogan, Mike A2 Cydulka, Rita K. A2 Fitch, Michael T. A2 Joing, Scott A. A2 Wang, Vincent J. A2 Cline, David M. A2 Ma, O. John SR Print(0) ID 1143140367 T1 Spontaneous and Iatrogenic Pneumothorax T2 Tintinalli's Emergency Medicine Manual, 8e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9780071837026 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1143140367 RD 2024/03/29 AB Pneumothorax occurs when air or gas enters the pleural cavity, the potential space between the visceral and parietal pleura, leading to partial lung collapse. Smoking is the most common risk factor for spontaneous pneumothorax.