Pyloric stenosis refers to a narrowing of the passage between the stomach and the small intestine. The condition, which affects infants during the first several weeks of life, can be corrected effectively with surgery. Pyloric stenosis can be cured with a surgical procedure called a pyloromyotomy. In this operation, the surgeon makes an incision in the baby's abdomen. Then a small cut is made in the thickened muscle of the pylorus and it is spread apart. In this manner, the passage can be widened without removing any tissue. (The procedure may be performed with the aid of a laparoscope.) After surgery, the pylorus will heal itself. The thickening gradually goes away and the passage resumes a normal shape. The whole procedure (including anaesthesia) takes about an hour.
Statistical analysis on pyloric stenosis in Argentina resulted as ten cases of pyloric stenosis were diagnosed in postoperative newborns (esophageal atresia, small bowel atresia, diaphragmatic hernia, fetus-in-fetu, imperforate anus, lung biopsy, malrotation). Their mean gestational age was 36 weeks, birth weight was 3.2 kg, and age at newborn operation was 2 days. Their postoperative feeds started on the sixth day (mean), and the pyloric stenosis vomiting started on the 14th day. It took a mean of 12 days to make the diagnosis of pyloric stenosis, and this was done entirely by diagnostic imaging. Mean age at pyloromyotomy was 3 1/2 weeks.