咯血是临床上常见危重病之一,就诊不及时可导致患者死亡。当咯血量300~600ml/24h时视为大咯血。临床上最常见的有支气管扩张、肺结核、原发性肺癌、肺脓肿、霉菌感染以及慢性器质性疾患等。咯血大部分源于肺部体循环系统,主要为支气管动脉,其他亦有来自锁骨下动脉分支、肋间动 Hemoptysis is one of the most common critically ill patients in the clinic, which may lead to the death of the patient when the doctor fails to do so. When hemoptysis volume 300 ~ 600ml / 24h is considered as massive hemoptysis. Clinically, the most common bronchiectasis, tuberculosis, primary lung cancer, lung abscess, fungal infections and chronic organic diseases. Most of hemoptysis from the systemic circulation of the lungs, mainly bronchial artery, the other also from the subclavian artery branch, intercostal