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High platelet counts do not necessarily signal any clinical problems, and can be picked up on a routine full blood count.However, it is important that a full medical history be elicited to ensure that the increased platelet count is not due to a secondary process.
Platelet concentration in the blood (i.e. platelet count), can be measured manually using a hemocytometer, or by placing blood in an automated platelet analyzer using particle counting, such as a Coulter counter or optical methods. [47] Most common blood testing methods include platelet count in their measurements, usually reported as PLT. [48]
A normal platelet count ranges from 150 to 400 x10 9 /L, but these patients can have platelet counts well below 50 x 10 9 /L. These low platelet counts are associated with an increased bleeding risk. Generally, platelet transfusions are given at a threshold of 10 x10 9 /L in order to increase the number of circulating platelets.
Mean platelet volume (MPV) is a machine-calculated measurement of the average size of platelets found in blood and is typically included in blood tests as part of the CBC. Since the average platelet size is larger when the body is producing increased numbers of platelets, the MPV test results can be used to make inferences about platelet ...
The disease occurs in 1–2 per 100,000 people. The 2016 WHO requirements for diagnosis include > 450,000 platelets/μL of blood (normal 150,000–400,000) and characteristic findings in a bone marrow biopsy. Some of the consequences of having such high numbers of platelets include thrombosis or clots in blood vessels. Thrombi form more ...
Newer, more advanced thrombapheresis machines can filter white blood cells during separation. [citation needed] For example, with marginally acceptable whole blood (white blood cells: < 10,000/mm³; platelets: > 150,000/mm³), a dose (3×10 11) of platelets comes with about 2×10 10 white blood cells. This can seriously damage the patient's health.
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