患者术前的抵抗能力和创伤诱发的免疫抑制是决定腹部手术后感染的重要因素。输血又能增大创伤诱发的免疫抑制，而增加术后感染的风险。已有研究表明，组胺H。一受体桔抗剂盐酸雷尼替了能改善创伤、输血和脓毒血症诱发的免疫抑制。为了进一步评价雷尼替丁对术后单核细胞、中性粒 Preoperative patient resistance and trauma-induced immunosuppression is an important factor in determining post-abdominal infection. Transfusion can increase trauma-induced immune suppression, and increase the risk of postoperative infection. It has been shown that histamine H A receptor antagonist, ranitidine hydrochloride, improves wound healing, blood transfusions, and immunosuppression induced by sepsis. In order to further evaluate ranitidine on postoperative monocytes, neutrophils