Procedure

Abdominal Wall Defects- Pediatrics

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Abdominal wall defects are a type of congenital defect that allows the stomach, the intestines, or other organs to protrude through an unusual opening that forms on the abdomen.
During the development of the fetus, many unexpected changes occur inside the womb. Specifically the stomach, intestines, or other organs begin to develop outside the fetus’ abdomen through the abnormal hole in the abdomen and, as development progresses, the abdominal wall eventually encloses these organs. In some cases of defect either the umbilical opening is too oversized or has developed improperly which allows the organs to remain outside or to squeeze through the abdominal wall. 

There are two main types of abdominal wall defects that result due to the changes during development. They are omphalocele and gastroschisis. Gastroschisis develops when the abdominal wall does not completely close, and the organs are present outside of the infant’s body. Omphalocele occurs when some of the organs protrude through the muscles of the abdomen in the area surrounding the umbilical cord. Omphalocele can be either minor, with only some of the organs exposed, or severe, with most, if not all of the abdominal organs being exposed.

Abdominal wall defects can be treated surgically if there is no accompanying anomalies. The surgical procedure also called omphalocele repair/closure or gastroschisis repair/closure is not overcomplicated. The organs are normal but are misplaced.

However, if the abdominal cavity is too small or when the organs are too large or swollen to close the skin, it may be difficult to fit all the viscera into the small abdominal cavity. In such cases, the surgeon will place a covering pouch generally made of silastic, commonly called a silo (because it's shaped like an agricultural silo), over the abdominal organs on the outside of the infant. The silo serves to conserve heat and prevent infection.The silo is spring-loaded so that the device can be attached to the inside of the abdominal wall without sutures. The top of the silo is secured in a way that causes it to stand upright, so that the bowels are gradually coaxed into the abdominal cavity by gravity. This process can take up to a week, and final closure may be performed a few weeks later. More surgery may be required to repair the abdominal muscles at a later time

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