For example, in patients with severe cranial trauma, after surgery, the patient will probably have an increased platelet count and an increased platelet pressure, as long as antiplatelet drugs are given orally, such as aspirin, and the primary disease is actively treated. After control, the elevated platelet count and platelet pressure will gradually decrease to the normal range. However, for primary elevated platelet count and platelet pressure, the cause needs to be identified and a bone marrow aspiration needs to be performed to check whether the patient has a fusion gene. If the fusion gene is positive, the diagnosis of primary thrombocythemia is confirmed, and this will require treatment with hydroxyurea or subcutaneous interferon injections. Also, if the platelet count is abnormally high, a blood cell separator can be used to separate out the excess platelets from the blood to quickly reduce the number of platelets in the peripheral blood.