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→Platelet Number
===Platelet Number===
===Platelet Number===
Fischbach: platelet acticity is necessary for blood clotting, vascular integrity and vasoconstrciton, and the adhesion and aggreation activity that occurs during the formation of platelet plugs that occlues breaks in small vessels. Thrombocyte development takes place primarily in the bone marrow. the lifespan of a platelet is 7.5 days. 2/3 of all body platelets are found in circulating blood and 1/3 in the spleen.
The platelet count is of value when assessing bleeding disorders that occur with thrombocytopenai, uremia, liver disease or malignancies and for monitoring the course of disease associated with bone marrow failure. This test is indicated when the estimated platelet count on a blood smear appears abnormal. It is also part of a coagulation profile or work up. the mean platelet volume (MPV) is somtimes used in conjunction with a platelet count. The MPV indicates the uniformitiy of the size of the platelte population and is used for the differential diagnosis of throbocytopenia.
===BMBT===
===BMBT===