Placement of umbilical artery catheters: high vs. low.

Placement of umbilical artery catheters was retrospectively reviewed in 181 newborns to evaluate random placement of catheter tip in the "high" position between T7 and T9 in the thoracic aorta of 127 infants and in the "low" position below L3 in the abdominal aorta of 54 infants. Group differences in gestational age, asphyxia, hypotension, respiratory disease, duration of catheterization, or infusate type were not significant. Cyanosis or blanching in the low extremities occurred in 67% of the "low" group and 21% of the "high" group (P less than .001). Hematuria occurred in 39% of the "low" group and 21% of the "high" group (P less than .05). High placement appears to have fewer complications. Prompt intervention by neonatal nurse practitioners can help reverse complications that occur during umbilical artery catheterizations.

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