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 ?
On the other hand, Catalona takes a more aggressive approach, advising men to obtain a PSA blood test once a year, regardless of whether they notice signs of a swollen prostate.
or the French blood test is irrelevant to the issue of the AIDS test patent.
In a pilot study, they conducted blood tests on 25 alcoholic men from 18 to 52 years old and 24 nonalcoholic men with no family history of the disorder, ranging in age from 20 to 48 years.
In the past two years, we have concentrated our efforts on strengthening the company and developing tissue and blood tests to detect cancer.
Bringing this diagnostic blood test for Alzheimer's to market as soon as possible is critical to accelerating treatment options and improving quality of life for thousands of patients and their families who are enduring the current lengthy diagnostic process," said William Gartner, CEO and president of GW Medical Technologies LLC.
Though the whole procedure takes an hour, automation allows on-site processing of as many as 800 to 1,000 blood tests per hour at an average cost of about a penny per pound of meat involved, according to Diane Oliver, president of Idetek, the San Bruno, Calif.
The more women and physicians who express interest in the test via our Web site, the faster we can begin our clinical study for FDA approval and bring this remarkable blood test to market.
We are very excited to complete the testing necessary to bring this blood test to market quickly in order to begin to save thousands of women's lives through the earlier detection of breast cancer.
gov/health/health-topics/topics/bdt/types) National Heart, Lung and Blood Institute says the most common blood test that most of us have received is the Complete Blood Count, which helps detect disorders like anemia, clotting issues and blood cancers.
The Government today (September 26) released the latest blood lead level review results of citizens affected by the lead in drinking water incident and announced corresponding blood test service arrangements.
Even if you have already had a cardiac arrest, this blood test will help the doctors to provide the best treatments to you at the earliest, faster than what it would take without the test.
A SIMPLE blood test may in future provide breast cancer patients with an early warning of the disease returning after chemotherapy and surgery.