气胸是因脏层或壁层胸膜的病变或外伤 ,使空气进入胸膜腔所致。按病因分为创伤性气胸和自发性气胸。前者系直接或间接性胸腔创伤引起 ,如胸部刀伤等。后者分为原发性自发性气胸和继发性自发性气胸。原发性自发性气胸又称特发性气胸 ,常见于瘦高体形男性青年 ,胸部Ｘ线无明显病 Pneumothorax is due to visceral or parietal pleura lesions or trauma, the air into the pleural cavity caused. According to the cause is divided into traumatic pneumothorax and spontaneous pneumothorax. The former is directly or indirectly caused by chest trauma, such as chest wounds and so on. The latter is divided into primary spontaneous pneumothorax and secondary spontaneous pneumothorax. Primary spontaneous pneumothorax, also known as idiopathic pneumothorax, common in thin, tall, male, chest X-ray no obvious disease