患儿,男,1月,因频繁呕吐10天入院。患儿系第一胎,足月顺产,母乳喂养,10天前开始呕吐,几乎每次喂奶后数分钟即呕吐,呕吐物为奶块,无胆汁,呕吐呈进行性加重,患儿日益消瘦,大小便减少。体检:体温正常,神萎,脱水貌,皮肤弹性差,心肺正常,右上腹可扪及橄榄状肿块,入院后给予补液,纠正失水,酸中毒,GI检查,证实为先天性幽门肌肥厚,转外科行幽门括约肌松解术,术后第二天,患儿突发面色苍白,重度贫血,查(Hb由入院时的12.58％降到3.9％,RBC从436万/mm~3降到121万/mm~3)。切口渗血不止。腹腔穿刺为不凝固血液,考虑腹腔内出血。即行剖腹探查,术中探见有约250ml血性液体,横结肠系膜内见—5x5cm~2大小血肿,血肿直达腹膜后,向左扩展达肾门,幽门前区原切口处无渗血现象,关腹,为明确出血原因,查血小板10万/mm~2,出血时间1分, Children, male, January, due to frequent vomiting 10 days admitted to hospital. Pediatric first-line fetus, term full-term, breastfeeding, vomiting 10 days ago, almost every time after a few minutes of feeding that vomit, vomit milk block, no bile, vomiting was progressive increase in children with weight loss, Decreased urine. Physical examination: normal body temperature, wilting, dehydration appearance, poor skin elasticity, normal heart and lungs, right upper quadrant palpable olive-like mass, admission rehydration, correct dehydration, acidosis, GI examination confirmed congenital pyloric hypertrophy, The second day after operation, the patient developed pale and severe anemia. The Hb decreased from 12.58% at admission to 3.9%, and the RBC decreased from 4.36 million / mm ~ 3 to 121 Million / mm ~ 3). Not only bleeding incision. Abdominal puncture for non-coagulation of blood, consider intra-abdominal bleeding. That is, laparotomy exploration, intraoperative exploration to find about 250ml bloody fluid, transverse mesenteric see the size of -5x5cm ~ 2 hematoma, hematoma direct access to the peritoneum, extending to the left kidney gate, pyloric anterior incision without bleeding, off Abdomen, in order to clarify the cause of bleeding, check the platelet 100,000 / mm ~ 2, bleeding time 1 minute,