出血血液从血管或心脏向外流出,称出血.流出体外,称为外出血;流入组织内、体腔内或中空器官(如胃肠道、膀胱等),称为内出血.根据出血的来源可分为心脏性、动脉性、静脉性和毛细血管性出血.依照出血发生的机制可分为破裂性出血、侵蚀性出血及渗出性出血.破裂性出血多由外伤引起;浸蚀性出血常系肿瘤或炎症病变波及血管壁;渗出性出血常因血管壁损害而通透性增高或血小板等凝血因子的缺乏所致.各部位的出血常有其专用名词,如鼻出血称鼻衄;呼吸道出血称咯血;消化道出血称呕血或吐血;泌尿道出血、尿中含血时称血尿;粪便中含血称血便;子宫出血称血崩症;脑出血称卒中.多量血液流出血管外,积存于组织中,称血 Bleeding Blood from the blood vessels or the heart outflow, said bleeding. Out of the body, known as bleeding; into the organization, body cavity or hollow organs (such as the gastrointestinal tract, bladder, etc.), known as bleeding. According to the source of bleeding can be divided Cardiac, arterial, venous and capillary hemorrhage in accordance with the mechanism of bleeding can be divided into ruptured bleeding, erosion bleeding and bleeding exudative bleeding caused by more than traumatic; erosive bleeding often Tumor or inflammatory lesions affecting the blood vessel wall; exudative bleeding often due to vascular wall damage and increased permeability or lack of platelets and other clotting factors caused by bleeding in various parts often have their own special terminology, such as epistaxis called epistaxis; respiratory tract Bleeding is called hemoptysis; gastrointestinal bleeding called hematemesis or vomiting blood; urinary tract hemorrhage, urinary blood when called hematuria; stool containing blood called bloody stool; uterine bleeding said the splatter; cerebral hemorrhage said stroke .A large amount of blood out of the blood vessels, Organization, said blood