blood test


Also found in: Dictionary, Thesaurus, Medical, Legal, Acronyms, Wikipedia.

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.
..... Click the link for more information.
 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.
..... Click the link for more information.
. 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
..... Click the link for more information.
 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.
..... Click the link for more information.
. 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.
..... Click the link for more information.
. 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.
..... Click the link for more information.
. 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 ?
Does your doctor order blood tests for you as part of preventative care?
During my recent hospital ordeal, I would have hated to think that I neglected to have annual blood tests done, and as a result, my heart might be slowly dying from oxygen starvation because I failed to take preventive measures.
Mr Woodhead, 62, said: "It's strange that we can't get blood tests done at Waterloo surgery when the smaller surgery in Kirkheaton does them.
Patients who are positive with a sensitive early detection blood test can be routed to ultrasound and/or MRI screening, bridging the gap between MRI and Mammography alone.
If we are ever going to get a blood test for Alzheimer's disease into the hands of primary care providers, we must have guidelines," said Sid O'Bryant, PhD, Interim Director of the Institute of Aging and Alzheimer's Disease Research.
If your blood test result reveals an imbalance of free testosterone and/or estradiol, you are in a position to initiate immediate corrective action.
He now wants to cause more parking problems by sending patients there for blood tests.
Those volunteers were much more likely than the others to have had a relatively small proportion of immune cells die in the original blood test, Crompton reports.
Whether that means that we do blood screening or a blood test before competition, I think most of the athletes would be happy to do that.
The third (2-year-old) sibling's first blood test was negative, and the family did not agree to a second blood test.
LIZ McCOLGAN believes fellow Scot Dougie Walker could clear his name by taking a blood test.
Coverage of major blood test categories including hematology, molecular screening, toxicology, and also oncology biomarker tests and cardiology tests.