严重后鼻部出血是指一次或多次后鼻部出血引起血压下降甚至发生休克 ,是临床上较少见而严重的病症。少数患者因出血原因不明、部位不清而造成治疗上的困难。数字减影血管造影 (DSA)具有诊断和治疗两种功能[1] ,且有图像清晰 ,诊断迅速、可靠等优点 ,在临床上广泛用于血管瘤、假 Serious bleeding after the nose refers to one or more after the nose bleeding caused by blood pressure or even shock, is clinically rare and serious illness. A small number of patients due to unknown causes of bleeding, unclear parts and cause treatment difficulties. Digital subtraction angiography (DSA) has two functions of diagnosis and treatment [1], and has the advantages of clear images, rapid diagnosis, reliable and so on. It is widely used clinically in hemangiomas,