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Decreased oxygenation and hyperlipemia during intravenous fat infusions in premature infants
Insights
Premature infants under one week old are more susceptible to hypoxemia and hyperlipemia when receiving intravenous fat emulsions. Their tolerance improves with age, highlighting the need for careful monitoring in neonates.
Area of Science:
- Neonatalogy
- Pediatric Nutrition
- Intensive Care Medicine
Background:
- Premature infants often require nutritional support, including intravenous fat emulsions.
- Assessing the safety and tolerance of these infusions in vulnerable neonatal populations is crucial.
Purpose of the Study:
- To evaluate the effects of intravenous fat emulsion infusion on pulmonary function and plasma triglyceride levels in premature infants.
- To determine the impact of postnatal age on the tolerance of intravenous fat emulsions.
Main Methods:
- Eighteen appropriate-for-gestational-age premature infants received 1 gm/kg of intravenous fat emulsion over four hours.
- Pulmonary function parameters (PO2) and plasma triglyceride levels were monitored.
- Infants were categorized by age (less than 1 week vs. 2-3 weeks).
Main Results:
- Infants less than 1 week old showed a significant decrease in PO2 levels during fat infusion.
- Younger infants exhibited significantly higher peak plasma triglyceride levels compared to older infants.
- A strong correlation (r=0.75) was found between increased triglyceride levels and younger postnatal age.
Conclusions:
- Small premature infants in their first week of life are more prone to hyperlipemia and hypoxemia from intravenous fat infusions.
- Hypoxemia during infusion is not linked to altered lung dynamics.
- Intravenous fat tolerance is enhanced after the first week of life in premature infants.
Abstract:
Eighteen appropriate-for-gestational-age premature infants with birth weights ranging from 0.77 to 1.89 kg received 1 gm/kg of body weight of fat emulsion, intravenously, over a four-hour period. Infants less than 1 week of age developed a significant decrease in PO2 levels (P < 5.0) during the fat infusion period. There were no changes in other pulmonary function parameters. Infants less than 1 week of age also developed significantly higher peak levels of plasma triglycerides than infants 2 to 3 weeks old (P < .05). A correlation between increment in triglyceride levels and postnatal age was demonstrated (r = .75), with the younger infants presenting the higher triglyceride levels. This study demonstrates that: (1) small premature infants receiving intravenous fat are more susceptible to hyperlipemia and hypoxemia during the first week of life; (2) hypoxemia associated with intravenous fat infusion does not result from changes in lung dynamics; (3) the capacity to tolerate intravenous fats is enhanced after the first week of life.