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 ?
Future efforts should involve different ethnicities to confirm the effectiveness and accuracy of the blood test.
The blood test could provide an efficient way to find people with early signs of the disease to participate in drug clinical trials.
BLOOD tests could have helped diagnose a cancer patient's deteriorating condition sooner, an inquest heard.
Online appointments, which are available for fasting blood tests at the George Eliot Hospital and for all blood tests at Atherstone and Bedworth Health Centre Phlebotomy clinics, were launched last year to help reduce waiting times and cut calls to the departments.
It was back in June whenconcerns were first raised about the 'atrocious service' by David Carr, chair of the Patients Forum at the George Eliot Hospital, who slammed the 'unacceptable' online blood test booking service.
"Once the protocols for a diagnostic heart disease blood test are in place; it will be possible to additional markers for the test to also be used in predicting diabetes and potentially Alzheimer's disease as well.
"This melanoma autoantibody signature may prove valuable for the development of a diagnostic blood test for routine population screening that, when used in conjunction with current melanoma diagnostic techniques, could improve the early diagnosis of this malignancy and ultimately decrease the mortality rate of patient," the authors write.
M2 PHARMA-June 4, 2018-CellMax Life Commences US Clinical Study of Blood Tests for Early Cancer Detection
Consultant Dr Moya Dawson said a blood test "should have been done" on Callum, of Redditch.
This common blood test measures the amount of various types of blood cells in a sample of your blood.
Researchers in Japan and Australia have developed a blood test that detects the toxic protein amyloid beta which has been linked to Alzheimer's brain disease.
Summary: A new blood test can detect eight common forms of cancer and could potentially lead to earlier detection