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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 ?
After suspecting inutero onset of fetal anemia, we confirmed the FMH using the KB test.
FMH doesn't reveal revenue numbers, but President Kurt Hue1sman says business is up.
The FMH is working with OCHR to refine procedures and decrease lapses in access.
Most US laboratories perform a qualitative screen for excess FMH using the fetal rosette test, followed, if positive, by a Kleihauer-Betke-type stain of the maternal blood smear to count the percentage of RBCs with fetal hemoglobin (HbF).
Further evaluation of plasma [gamma]-globin mRNA concentrations after the events that potentially cause FMH at gestational ages later than 9 weeks is necessary to validate its clinical value as a gender-independent marker for FMH.
Acupnncture has been granted permanent status, while other forms of traditional Chinese medicine (including medicinal massage, aromatherapy and herbal therapeutic methods); homeopathy; anthroposphy; neural therapy; and phytotherapy will be on trial status until June, 2005 At that time the FMH will conduct an evaluation and decide on permanent status.
FMH Conveyors conducted an evaluation to determine the best location for an expansion and selected Jonesboro for a new, 200,000-SF facility that recently celebrated its grand opening.
Setting: Prosthodontics department FMH college of Medicine and Dentistry.
Headquartered in West Des Moines, Iowa, FMH has served America's farmers since 1893.
We truly believe in 'People First,' and so, between the Greater Fairbanks Community Hospital Foundation and FMH [Fairbanks Memorial Hospital], we find ways to provide the services our community needs.