老年人咯血的流行病学及病因
Practical Geriatrics(2009)
Abstract
咯血是指喉及喉以下呼吸道任何部位的出血,经口排出者.它是由于各种有害因子对肺毛细血管的直接损伤或通过血管活性物质的作用使毛细血管的通透性增高所致,也可由于炎症、肿瘤或结核等病变侵蚀肺小血管壁而引起.
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