Urinary ascites: complication of umbilical artery catheterization

In the newborn, intraperitoneal extravasation of urine from a urachal laceration may follow an attempt at umbilical artery catheterization. Clinical results of this injury are neonatal ascites, anuria, and azotemia. Herein, we describe a case of iatrogenic bladder injury with successful management following late detection. The anatomy of the urachus and bladder in the newborn are reviewed as well as clues to the diagnosis of neonatal urinary ascites.