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Triglyceride and fatty acid clearance in neonates following safflower oil emulsion infusion.

Fifteen neonates requiring parenteral nutrition with lipid emulsion were given a 1.0 g/kg dose of safflower oil emulsion to evaluate triglyceride (TGY) and free fatty acid clearance. The dose was infused intravenously over 4 hr, and serum was obtained at 0, 2, 4, 6, and 8 hr. Peak serum TGY averaged 592 mg/dl for the appropriate for gestational age newborns and 606 mg/dl for the small for gestational age babies. The small for gestational age neonates had significantly higher serum free fatty acids at 2 and 4 hr into the infusion than did the appropriate for gestational age infants. Peak serum free fatty acids ranged from 0.915 to 3.233 mM in the appropriate for gestational age babies and 2.518 to 3.586 mM in the small for gestational age infants. In contrast to previous work with soybean oil emulsion, we did not demonstrate differences in TGY clearance between small for gestational age and appropriate for gestational age neonates and did demonstrate a markedly elevated serum TGY in these critically ill newborns. Serum TGY and free fatty acids must be monitored in newborns administered intravenous fat emulsion to avoid the complications of iatrogenic hyperlipemia.