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(hĕm`ərĭj), escape of blood from the circulation (arteries, veins, capillaries) to the internal or external tissues. The term is usually applied to a loss of blood that is copious enough to threaten health or life. Slow bleeding may lead to anemiaanemia
, condition in which the concentration of hemoglobin in the circulating blood is below normal. Such a condition is caused by a deficient number of erythrocytes (red blood cells), an abnormally low level of hemoglobin in the individual cells, or both these conditions
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, while the sudden loss of a large amount of blood may cause shockshock,
any condition in which the circulatory system is unable to provide adequate circulation to the body tissues, also called circulatory failure or circulatory collapse. Shock results in the slowing of vital functions and in severe cases, if untreated, in death.
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. Hemorrhage from a cerebral artery can be fatal because of interference with brain function. Many diseases and disorders (e.g., hemophilia, hemorrhagic fevers, hemorrhoids, peptic ulcer, scurvy, tuberculosis, and typhoid fever) as well as childbirth and many injuries can give rise to hemorrhage. Internal hemorrhage may require surgical intervention. See first aidfirst aid,
immediate and temporary treatment of a victim of sudden illness or injury while awaiting the arrival of medical aid. Proper early measures may be instrumental in saving life and ensuring a better and more rapid recovery.
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escape of blood from blood vessels that have been injured as a result of trauma or vascular disease.

Hemorrhages may be arterial (scarlet blood spurts like a fountain), venous (a flow of dark blood), capillary, or mixed. The intensity of bleeding depends on the size of the injured vessel and the condition of its wall. Blood may flow to the outside, into the lumen or body of an organ (stomach, intestine, brain), or into a cavity (abdominal, pleural). Bleeding is accompanied by pallor of the skin and mucosa, dizziness, weakness, dyspnea, thirst, a drop in arterial pressure, and a weak and rapid pulse. A large and rapid blood loss (25 percent of the blood volume or 4—4.5 percent of the body weight) produces loss of consciousness and may result in death. Persons weakened by a disease can be severely affected by even a small blood loss. In persons with atherosclerosis of the blood vessels, bleeding continues longer and is more difficult to stop. Bleeding in hemophilia patients, which arises when there is the slightest trauma, is extremely persistent.

Measures for stopping bleeding depend on its cause and source. Arrest of bleeding may be temporary or permanent. For temporarily stopping bleeding, a tourniquet, or pressure bandage, is applied to the extremities; vasoconstrictors, ice, or hemo-static sponges (on wounds) are also used. These measures often lead to complete cessation of bleeding; if bleeding does not stop it becomes necessary to resort to surgical methods (ligation of the vessel, suturing, removal of the injured or affected organ or of part of it) to achieve permanent cessation of bleeding. Blood transfusion or transfusion of blood substitutes that increase blood coagulation is a necessary part of treatment to control hemorrhage.



The escape of blood from the vascular system.


(US), hemorrhage
profuse bleeding from ruptured blood vessels
References in periodicals archive ?
Descriptive statistics was used to calculate mean and standard deviation for variables like age of patient; frequencies and percentages for parity, gravida, blood loss and postpartum hemorrhage after misoprostol treatment.
According to BMMS-2016 survey, Over 50 per cent of deliveries are being occurred at home while government is distributing misoprostol a medication used to start labor, cause an abortion, prevent and treat stomach ulcers, and treat postpartum bleeding due to poor contraction of the uterus -- to prevent hemorrhage among 17 percent while delivery.
Many clinicians and organizations advise active management of the third stage of labor to decrease the likelihood of women experiencing postpartum hemorrhage.
Injections of IL-27 after a hemorrhage helped mice recover.
Tissue damage is mostly minor, such as subconjunctival hemorrhage, but in severe cases it might be more significant, such as subperiosteal hemorrhage which requires surgical intervention.
Intracerebral hemorrhage (ICH) accounts for 10 to 20% of strokes in Caucasians and Europeans, with statistics reaching 20-30% in Asian and black population.
Late massive uterine hemorrhage caused by ruptured uterine artery pseudoaneurysm after laparoscopic-assisted myomectomy.
Intramedullary hemorrhage caused by spinal cord hemangioblastoma: a case report.
Under the impression of intracerebral hemorrhage with unknown etiology, she was admitted to intensive care unit for further survey.
Postpartum hemorrhage is the leading cause of maternal deaths majorly in low income countries.
Between January 2014--January 2016 we hospitalized on emergency 160 patients with spontaneous ICH, 136 of them supratentorial hemorrhage and 24 patients within fratentorial hemorrhage.
Known diabetic patients above 16 years of age, having vitreous hemorrhage were included.