text: 血尿的原因为：①肾脏实质损害：如同时存在500mg/d以上的蛋白尿及管型说明多来自肾脏，可见于各种急慢性肾炎、肾结核以及肾静脉血栓等；②来自肾脏以下的泌尿系：如泌尿系感染、出血性膀胱炎、结石和肿瘤等；③肾外疾病：各种出凝血疾病以及心功能不全等。
entities.entity: 血尿
entities.label: dis
entities.entity: 肾脏实质损害
entities.label: dis
entities.entity: 蛋白尿
entities.label: ite
entities.entity: 管型
entities.label: ite
entities.entity: 肾脏
entities.label: bod
entities.entity: 急慢性肾炎
entities.label: dis
entities.entity: 肾结核
entities.label: dis
entities.entity: 肾静脉血栓
entities.label: dis
entities.entity: 肾脏
entities.label: bod
entities.entity: 泌尿系
entities.label: bod
entities.entity: 泌尿系感染
entities.label: dis
entities.entity: 出血性膀胱炎
entities.label: dis
entities.entity: 结石
entities.label: dis
entities.entity: 肿瘤
entities.label: dis
entities.entity: 肾
entities.label: bod
entities.entity: 出凝血疾病
entities.label: dis
entities.entity: 心功能不全
entities.label: dis