Platelet transfusion is a common clinical treatment for patients with severely reduced platelet counts and significant bleeding, and is especially used in diseases such as acute leukemia or severe aplastic anemia and myelodysplastic syndrome. Generally a therapeutic amount of platelets requires a slow rate of about 15 drops per minute at the beginning of the transfusion, especially within the first 10 minutes of starting the platelet transfusion. If the patient has no obvious discomfort, the speed can be appropriately accelerated, generally reaching a level of about 40 drops per minute, after about half an hour, a therapeutic amount of platelets can be inputted. By inputting platelets within this time, the activity of platelets can be ensured and the therapeutic effect of platelet transfusion can be increased. If the patient has significant adverse reactions when starting the transfusion treatment, slow down the speed to prevent feverish reactions and allergic reactions caused by platelet transfusion.