男患，12岁。因上腹部被自行车撞伤疼痛3天入院，伴恶心呕吐，呕吐物含胆汁祥物。体检：一般可，上腹部偏右轻度压痛，无肌紧张和反跳痛，未及包块，肠鸣音减弱。腹部平片示胃扩张，液体储留。遂行胃肠减压，并由胃管注入45％泛影葡胺行X线造影，示十二指肠横部逐渐狭窄，造影 Male suffering, 12 years old. The upper abdomen was hit by a bicycle pain 3 days admitted, with nausea and vomiting, vomit with bile mascot. Physical examination: generally available, mild right mild tenderness on the abdomen, no muscle tension and rebound tenderness, not mass, bowel sounds weakened. Abdominal plain film shows stomach dilatation, fluid retention. Gastrointestinal decompression was performed by the tube into the 45% diatrizoate meglumine line X-ray showed gradual narrowing of the transverse section of the duodenum, radiography