1临床资料患者男性,71岁,3 d前出现腹痛、黑便,就诊当日解黑便5次,每次量约100 ml,并乏力、纳差,2014年5月10日因“腹痛、黑便3 d”至急诊就诊。患者既往有胃溃疡病史10年,曾因消化道出血在外院输血治疗,救治过程中曾出现1次输血反应,否认食物和药物过敏史,因风湿性关节炎长期每日口服强的松片5 mg治疗。查体:体温36.8℃,脉搏95次/分,呼吸 1 clinical data Male patients, aged 71, abdominal pain occurred 3 days ago, melena, the day of treatment on the black will be 5 times, each about 100 ml, and fatigue, anorexia, May 10, 2014 because of “abdominal pain, Black stool 3 d ”to the emergency treatment. Past history of patients with gastric ulcer 10 years, had transfusion of blood in the hospital for treatment of gastrointestinal bleeding, treatment has occurred in a transfusion reaction, denied food and drug allergy history, rheumatoid arthritis long-term daily oral prednisone 5 mg treatment. Physical examination: body temperature 36.8 ℃, pulse 95 beats / min, breathing