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blood pressure load

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During ambulatory (outpatient) blood pressure monitoring, the amount of time that a patient's systolic or diastolic blood pressure exceeds normal values.

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blood product

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Blood component.

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bloodroot

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(blŭd′root″) A perennial flowering herb (Sanguinaria canadensis) native to eastern North America. The plant produces several pharmacologically active alkaloids, of which the most extensively studied is sanguinarine. SEE: sanguinarine.

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blood salvage

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A collection of the siphoned blood that has escaped from the operative site of non-contaminated surgeries so that after appropriate filtration it may be returned to the patient. SEE: autologous blood transfusion; cell saver.

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bloodshot

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(blŭd′shot″) Local congestion of the smaller blood vessels of a part, as when the vessels of the conjunctiva are dilated and visible.

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bloodstream

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(blŭd′strēm″) The blood that flows through the circulatory system of an organism.

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blood test

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A test to determine the chemical, physical, or serological characteristics of the blood or some portion of it.

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blood thinner

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A popular but incorrrect name for an anticoagulant or antiplatelet drug.

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blood typing

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The classification of red blood cells by the proteins and carbohydrates (antigens) found on the surface of the erythrocyte membrane.

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blood warmer

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A device that raises refrigerated blood or intravenous fluids to a desired temperature, usually 98.6°F (37.0°C), or a little above.

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Image not available. Testing the device for temperature control on a regular basis is important to avoid transfusion errors.

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Bloom syndrome

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(bloom) [David Bloom, U.S. dermatologist, b. 1892] An autosomal recessive disease, found predominantly but not exclusively in persons of Jewish ancestry, marked by chromosomal abnormalities, facial rashes, dwarfism, and a propensity to develop leukemia.

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blotch

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(blŏtch) A blemish, spot, or area of discoloration on the skin.

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blotting method

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SEE: under method.

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Blount disease

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[Walter Putman Blount, U.S. surgeon, 1900–1992] Tibia vara.

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blow-by

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(blō′bī″) An imprecise method of oxygen delivery in which an oxygen source (such as a tube connected to a pressurized gas canister) discharges oxygen in front of the nostrils or mouth of the patient.

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PATIENT CARE: It is used primarily to supply supplemental oxygen to infants, neonates, and toddlers, who may not tolerate wearing other oxygen delivery systems (such as a nasal cannula or face mask).

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blowfly

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(blō′flī″) Any of the flies belonging to the family Calliphoridae. Most blowflies are scavengers. Their maggots (larvae) live in ...

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