Result:The percentage of component blood transfusion was increasing year by year.The whole blood quantity gradually decreased,whereas the quantity of platelet and cryoprecipitate gradually increased.

• 结果:成分输血比例逐年上升,全血用量逐年明显减少,血小板、冷沉淀用量逐步增加,白细胞输注趋于淘汰,人均用血量无明显变化,血浆用量逐年增加,但所占比例逐年下降。