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A platelet count is a diagnostic test that determines the number of platelets in the patient's blood. Platelets, which are also called thrombocytes, are small disk-shaped blood cells produced in the bone marrow and involved in the process of blood clotting.ypersplenism is characterized by the collection (sequestration) of platelets in the spleen. Disseminated intravascular coagulation (DIC) is a condition in which blood clots occur within blood vessels in a number of tissues. All of these diseases produce reduced platelet counts.
A low platelet count, medically known as thrombocytopenia, is a health disorder in which your blood has a lower than normal number of platelets. Platelets are the smallest of the blood cells that aid in blood clotting by forming plugs in blood vessel holes.The platelets circulate in the blood with an average lifespan of 5 to 9 days. A normal platelet count in a healthy person ranges from 150,000 to 450,000 platelets per microlitre of blood.latelets are the smallest of the blood cells that aid in blood clotting by forming plugs in blood vessel holes. The platelets circulate in the blood with an average lifespan of 5 to 9 days. A normal platelet count in a healthy person ranges from 150,000 to 450,000 platelets per microlitre of blood.