咯血是指喉及喉以下呼吸道任何部位的出血,经口排出者,临床上非常常见,即使在老年人中咯血也是一种常见临床症状。文献报道,老年人咯血的疾病谱虽然与青壮年人群有所不同,但呼吸系统疾病仍然是老年人咯血的主要原因,约占60%~92%,前三位病因主要是肺结核、肺癌和慢性支气管炎,而 Hemoptysis refers to the throat and throat below the respiratory tract any part of the bleeding, oral discharge, clinically very common, even in the elderly, hemoptysis is also a common clinical symptom. It has been reported in the literature that although the disease spectrum of hemoptysis in the elderly is different from that of young adults, respiratory diseases are still the major cause of hemoptysis in the elderly, accounting for about 60% -92%. The top three causes are mainly pulmonary tuberculosis, lung cancer and chronic Bronchitis, however