1, abdominal inverted x-ray plain film: routine examination, can initially determine the site of atresia blind end, the degree of atresia proximal colon dilatation and possible prognosis, but due to the filling of the fetal stool affects the location of gas movement in the intestinal cavity, while the specific technical requirements of the shooting time, the results of the plain film may have a large error, but also need to be combined with the clinical situation comprehensive analysis.