FIGURE 116.15 Dilated loops of small intestine and absence of air in lower abdomen indicating a high intestinal obstruction caused by postoperative adhesions To lessen the risk of vomiting and aspiration, the barium should be evacuated from the stomach after the upper GI series has been completed Surgical pyloromyotomy is standard, and such infants can usually be discharged from the hospital days after surgery Infants may have some regurgitation postoperatively as a result of a temporary relaxation of the gastroesophageal sphincter Postoperative Adhesions Prior abdominal surgery or peritonitis places a child at risk for intestinal obstruction from adhesions ( Fig 116.15 ) Such obstruction can occur relatively