With the development of transfusion technique,the shortage of blood could be fully utilized and the side effects of blood transfusions were reduced when we used the blood components.Now,blood components get comprehensive promotion in China.Platelet is an important component of blood coagulation,platelet transfusion is the main measure to prevent bleeding and improve the survival rate of patients with thrombocytopenia.At present,platelet are mainly used for massive hemorrhage patients,hematological patients ...