我院收集了1990年2月～1996年8月经纤维支气管镜(纤支镜)检查的咯血患者284例,其中Ｘ线胸片阴性咯血患者43例,现报告如下。1　资料与方法1.1　一般资料本组43例,其中男性27例,女性16例。年龄22～78岁,平均年龄50.2岁。病程最短2ｄ,最长10年。咯血量均以24ｈ累计计算[1],小量咯? Our hospital collected from February 1990 to August 1996 by bronchoscopy (bronchoscopy) examination of patients with hemoptysis in 284 cases, including 43 cases of X-ray negative hemoptysis, are as follows. 1 Materials and Methods 1.1 General Information 43 cases in this group, including 27 males and 16 females. Aged 22 to 78 years old, with an average age of 50.2 years old. Duration of the shortest 2d, up to 10 years. The amount of hemoptysis are calculated in 24h [1], a small amount of slightly?