BLADDER PRESSURE MONITORING SIGNIFICANTLY ENHANCES CARE OF INFANTS WITH ABDOMINAL-WALL DEFECTS - A PROSPECTIVE CLINICAL-STUDY

Increased intraabdominal pressure (IAP) has been demonstrated to cause intestinal and renal ischemia in both animals and humans. Neonates undergoing closure of anterior abdominal wall defects are at risk for these complications from markedly increased IAP, which are putatively responsible for a 13% to 20% mortality. In an effort to decrease morbidity and mortality we performed a 4-year prospective clinical study to determine if monitoring IAP using bladder pressure (BdP) measurements would significantly improve perioperative care in infants with abdominal wall defects. Forty-two consecutive infants with gastroschisis (28) and omphalocele (14) were prospectively studied. Intraoperative and serial postoperative measurements of BdP were obtained from an indwelling bladder catheter using a standard pressure transducer. Methods of initial closure, as well as manipulations in sedation, paralysis, and silo reduction, were selected to keep BdP <20 mm Hg. Bladder pressure monitoring significantly altered the management of 64% of our patients, particularly those with gastroschisis (74%). Thirteen patients with gastroschisis underwent staged closure; in 7 (54%) this decision was based on high BdP even though bowel reduction was mechanically possible. Elevated BdP influenced the closure method and timing of silo reductions in 5 of 14 (42%) infants with omphalocele. There were no episodes of renal failure or refractory oliguria. There were three patients in a single cluster who developed uncomplicated, nonsurgical necrotizing enterocolitis late in their respective courses. One patient whose bowel was placed in a silo had severe hypotension associated with group B streptococcal sepsis and subsequently developed necrotic bowel despite low BdP. The only death in this series was a child who died of biliary atresia at 14 months of age. Our experience demonstrates that intraabdominal pressure monitoring provides data that are objective and easy to interpret, and substantially improves the management of infants with anterior abdominal wall defects. © 1993 W.B. Saunders Company. All rights reserved.