Neonatal parenteral nutrition with a fat emulsion containing medium chain triglycerides.

Fifty-one newborn infants requiring parenteral nutrition were randomly assigned to receive a 50% medium chain triglyceride/50% long chain triglyceride lipid emulsion or the conventional 100% long chain triglyceride emulsion. Fat was administered daily for 20 hours, to a maximum of 3 g/kg/day. Plasma triglycerides, cholesterol, free fatty acids, ketones, glucose and capillary blood gases were monitored daily up to the sixth day of fat infusion. There were no significant differences in mean plasma triglycerides and free fatty acids between the two groups. No cases of hyperketonaemia were detected in the infants studied. Hyperglycaemic episodes were detected with similar frequency in both groups. The group who received the emulsion containing medium chain triglycerides had significantly lower mean plasma cholesterol values during the study. After 6 days of intravenous fat administration mean plasma cholesterol was more than 100% higher in the group which received the conventional emulsion. Differences in cholesterol content between the emulsions and a cholesterol lowering effect of medium chain triglycerides are possible explanations for these findings.