A therapeutic amount of platelets is about 300ml. A therapeutic amount of platelets is a unit of measurement that is often transfused to patients with platelet deficiency in clinical practice, and a general transfusion of a therapeutic amount of platelets can raise the patient’s platelets by about 30,000-40,000, i.e. after a therapeutic amount of platelets is transfused, the patient’s platelets can be raised by 30,000-40,000. in clinical practice In clinical practice, platelet transfusion is often used in patients with blood system diseases, such as patients with heavy aplastic anemia who have severe bleeding conditions and need platelet transfusion. At the same time, patients with leukemia, multiple myeloma, and myelodysplastic syndrome, after chemotherapy, the number of platelets will be severely reduced, then also need to transfuse platelets, usually a single input of a therapeutic amount of platelets, can play a significant effect of hemostasis.