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bloodletting

bloodletting, also called bleeding, practice of drawing blood from the body in the treatment of disease. General bloodletting consists of the abstraction of blood by incision into an artery (arteriotomy) or vein (venesection, or phlebotomy). Local bloodletting is the abstraction of blood from smaller vessels by watercupping or by leeching. From antiquity through the 18th cent. bloodletting was widely practiced in western medicine. A broad assortment of ailments were believed to result from the impurity or superabundance of blood in the system; periodic bloodletting was felt to assure the patient of good health. In modern times the medicinal leech (Hirudo medicinalis) is still used in some areas of the world for the removal of blood from bruises and black eyes. Venesection is employed to treat erythremia, an abnormal condition characterized by the overproduction of red blood cells, and to relieve the congestion of blood resulting from acute heart failure.

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bloodletting

blood·let·ting / ˈblədˌleting/ • n. chiefly hist. the surgical removal of some of a patient's blood for therapeutic purposes. ∎  the violent killing and wounding of people during a war or conflict: gang members have halted their internecine bloodletting. ∎  bitter division and quarreling within an organization.

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bloodletting

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