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Platelets, also known as thrombocytes, are small blood cells. They form in your bone marrow, the sponge-like tissue in your bones. Platelets are essential for blood clotting . A blood clot is a mass of blood that forms when platelets, proteins, and cells in the blood stick together. When you get hurt, your body forms a blood clot to stop the bleeding.
Technology
An assay performed to assess platelet clumping, often with the addition of agonists.
Tests
The determination of the amount of agranular platelets present in a sample.
Indicators
The orally bioavailable alpha form of the naturally-occurring fat-soluble vitamin E, with potent antioxidant and cytoprotective activities. Upon administration, alpha-tocopherol neutralizes free radicals, thereby protecting tissues and organs from oxidative damage. Alpha-tocopherol gets incorporated into biological membranes, prevents protein oxidation and inhibits lipid peroxidation, thereby maintaining cell membrane integrity and protecting the cell against damage. In addition, alpha-tocopherol inhibits the activity of protein kinase C (PKC) and PKC-mediated pathways. Alpha-tocopherol also modulates the expression of various genes, plays a key role in neurological function, inhibits platelet aggregation and enhances vasodilation. Compared with other forms of tocopherol, alpha-tocopherol is the most biologically active form and is the form that is preferentially absorbed and retained in the body.
Article
Research record from J Pathol, 2026-07-14. PMID 42446223.
Tests
The determination of the amount of bizarre platelets present in a sample.
Tests
The determination of cellular CD31 expression in a biospecimen.
Tests
The determination of the number of giant platelets present in a sample.
Tests
A hematocrit test is a blood test that measures the amount (percent) of your blood that is made up of red blood cells. Red blood cells carry oxygen from your lungs to the rest of your body. The other parts of your blood include white blood cells (to help fight infection and other diseases), platelets (to help make blood clots to stop bleeding ), and a liquid called plasma.
Tests
The determination of the ratio of immature platelets compared to total platelets present in a sample. The measurement may be expressed as a ratio or percentage.
Tests
The determination of the number of large platelets present in a sample.
Article
Research record from Res Pract Thromb Haemost, 2026-03-26. PMID 42064205.
