Which is the best schedule of autologous blood storage for pre-operative AIS patients? Every week or every 2 weeks

Introduction It is important to avoid allogeneic blood transfusion for young patients who undergo corrective surgery. Autologous blood transfusion is now the major way to avoid it. We selected a blood storage method among several methods of autologous blood transfusion because there is no need for special equipment. However, progressing pre-operative anemia is still a major concern. We simply compared two different time-schedule of blood storage interval before operation in Adolescent Idiopathic Scoliosis (AIS) patients to know the better way to avoid preand postoperative anemia.