输血是临床常用的治疗手段,当患者出现失血、急性感染等情况时,及时输血尤为重要。血液制剂能快速补充血容量,使血压得到提升,维持和稳定机体正常生理功能。ABO血型系统是临床最重要的血型系统,ABO血型鉴定的准确性直接决定了输血的安全度。而日常血型检测中往往出现ABO血型正反定型不符,这些疑难血型是由各种原因造成~(〔1〕)。我们对遇到的49例疑难血型进行了 Blood transfusion is a commonly used clinical treatment, when patients with blood loss, acute infection, etc., timely transfusion is particularly important. Blood preparations can quickly add blood volume, blood pressure is increased, to maintain and stabilize the body’s normal physiological function. The ABO blood group system is the most clinically important blood group system. The accuracy of ABO blood group identification directly determines the safety of blood transfusion. The daily blood test often appear inconsistent with the ABO blood type positive and negative, these difficult blood type is caused by a variety of reasons ~ (〔1〕〕. We encountered 49 cases of difficult blood type