患儿女性,12岁。因面部,四肢皮肤紫癜伴膝肘关节肿胀、疼痛、活动受限一周,呕吐3天,黑便1天,诊断过敏性紫癜收住院。入院后不断有腹痛,呕吐咖啡样物,血便及新鲜出血点。体温37℃,血压13.5/9.5 kPa,全腹压痛,轻度肌紧张及反跳痛,并出现移动性浊音,以左下腹为著, Children with children, 12 years old. Due to facial, limb skin purpura with knee elbow swelling, pain, limited mobility for one week, vomiting for 3 days, black stool 1 day, diagnosis of allergic purpura in hospital. Continued after admission, abdominal pain, vomit coffee samples, bloody stool and fresh bleeding point. Body temperature 37 ℃, blood pressure 13.5 / 9.5 kPa, total abdominal tenderness, mild muscle tension and rebound tenderness, and mobility dullness to the left lower abdomen,