blood test

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blood test,

examination of bloodblood,
fluid pumped by the heart that circulates throughout the body via the arteries, veins, and capillaries (see circulatory system; heart). An adult male of average size normally has about 6 quarts (5.6 liters) of blood.
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 routinely or as an aid in diagnosing a suspected disease. Tests may be performed on whole blood or on the plasma portion only. Blood typing identifies the proteins at specific sites on red blood cells, a necessity in determining compatibility for blood transfusionblood transfusion,
transfer of blood from one person to another, or from one animal to another of the same species. Transfusions are performed to replace a substantial loss of blood and as supportive treatment in certain diseases and blood disorders.
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. Human Lymphocyte Antigens (HLA) is a form of white blood cell typing prerequisite for organ and bone marrow transplants. The Coulter Cell Counter is widely used in electronic counts of red blood cells for the diagnosis of 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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 and polycythemiapolycythemia
, condition characterized by an increase in the production of red blood cells, or erythrocytes, in the blood. Primary polycythemia, also called erythremia, or polycythemia vera, is a chronic, progressive disease, most common in middle-aged men.
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. White cell counts are vital in detecting infections or in confirming leukemialeukemia
, cancerous disorder of the blood-forming tissues (bone marrow, lymphatics, liver, spleen) characterized by excessive production of immature or mature leukocytes (white blood cells; see blood) and consequently a crowding-out of red blood cells and platelets.
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. Serum or plasma may be collected, cultured, and inoculated with bacteria or other substances for the purpose of detecting the body's reaction to infections, cancer, or HIV, the virus that causes AIDSAIDS
or acquired immunodeficiency syndrome,
fatal disease caused by a rapidly mutating retrovirus that attacks the immune system and leaves the victim vulnerable to infections, malignancies, and neurological disorders. It was first recognized as a disease in 1981.
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. Plasma may also be examined for evidence of functional disorders, e.g., for blood sugar in testing for diabetes mellitus. Blood tests for tumor markers, such as prostate-specific antigen, are effective in detecting cancer in high risk groups. Almost all blood tests are now performed by electronic equipment, and results are evaluated and printed out by computer.

blood test

[′bləd ‚test]
(pathology)
A serologic test for syphilis.
A blood count.
A test for detection of blood, usually one based on the peroxidase activity of blood, such as the benzidine test or guaiac test.
References in periodicals archive ?
Next, participant's pre- and post- blood analysis was analyzed.
Measurement of red blood cell count (RBC) size in dark field microscopy live blood analysis is used in this way and research has shown this approach to be an accurate indicator of such change.
"Over the past 40 years our workload has more than quadrupled, which has thrown up many challenges, especially since many oncology patients, and others, are treated on an outpatient basis, and require a blood analysis prior to their treatment.
Blood analysis indicates what is happening, while urine indicates what has happened.
David Mainstone, prosecuting, said the offence was aggravated as he was on bail awaiting blood analysis results after another alleged high reading on March 17.
The Japanese grant extended to the Syrian Haemophilia Society aims to establish a specialized clinic in blood diseases where all kinds of blood analysis are undertaken to test several blood diseases including haemophilia.
It wasn't until the medical examiner's office completed a blood analysis that the cause of death was determined.
NORDIC BUSINESS REPORT-16 February 2009-Swedish blood analysis systems developer CellaVision AB posts operating profit of SEK13.4m(C)1994-2009 M2 COMMUNICATIONS LTD http://www.m2.com
Muscle tests, a muscle biopsy, and complete blood analysis found nothing unusual.
Following her injury, doctors have ordered the 49-year-old to take a break and she is reportedly staying with friend Gwyneth Paltrow at the Hamptons resort in New York.Medics have advised she lessens the strain of her dance routines when she does return to rehearsals.The source added: "Madonna was told to go soft on work and rehearsals, so she will now take one proper day off every week and go easy in the mornings."She has a blood analysis done every few days - including one during last week's rehearsal."
This makes them appropriate for applications that demand a rapid time/temperature response such as blood analysis, platen temperature sensing and medical catheter devices.
SCIENTISTS are doing blood analysis on the body of a student in Coventry in an effort to find out what caused his sudden death.