Clinically recognized limb ischemia in the neonate after umbilical artery catheterization.

During a 4 year period, 1,461 critically ill neonates were admitted to the newborn intensive care unit of the Newark Beth Israel Medical Center, and 507 (35 percent) had umbilical artery catheters inserted for physiologic monitoring. In five patients (1 percent) clinically significant limb ischemia developed as a result of catheter complications. Frank gangrene was observed in three patients; two died from the primary illness soon after the onset of gangrene and the third survived after leg amputation. The other two infants had advanced ischemia that responded favorably to catheter removal and heparinization. Irreversible limb ischemia in this setting is infrequent, and milder forms are usually unrecognized or undocumented. High placement of the catheter or the length of time it is in place were not related to complications. Limb ischemia occurred soon after catheter insertion rather than after its protracted use. Major complications may be reduced by placement of the catheter in the lower abdominal aorta or internal iliac artery, clinical awareness and observation and frequent noninvasive monitoring. Immediate catheter removal and intravenous anticoagulation are warranted if ischemia persists. From this study, we believe that the benefits derived from judicious umbilical artery catheterization outweigh any inherent risk.