近年来手术前后处理的进步与输血有很大关系,这是众所周知的。最近有很多血浆增量剂和造血药,有一定疗效,但仍然不如输血。而且随着外伤和外科手术的增多,输血量剧增。现在广泛应用的ACD库存血,仍存在有.若干问题。第一,在4℃下只能保存21天,因此难以确保用血量;第二,大量输血可产生酸中毒、高血钾症、出血倾向等危险;第三,产生白细胞和血小板抗体;第四,感染, In recent years, the progress of preoperative and postoperative treatment has a great relationship with blood transfusion, which is well known. Recently there are a lot of plasma extenders and hematopoietic drugs, have a certain effect, but still not as good as blood transfusion. And with the increase in trauma and surgery, blood transfusion surge. Now widely used ACD blood bank, there are still some problems. First, it can only be stored for 21 days at 4 ° C, so it is difficult to ensure the amount of blood used. Second, a large number of blood transfusions can cause acidosis, hyperkalemia, bleeding tendency and other risks. Third, white blood cells and platelet antibodies are produced. Fourth, infection,