Related Experiment Videos
Pulmonary fat accumulation after intralipid infusion in the preterm infant
Insights
Fat accumulation in the lungs was observed in preterm infants following Intralipid infusion. This finding, even at recommended rates, suggests a potential risk of lung complications in vulnerable neonates.
Area of Science:
- Neonatalogy
- Pediatric Pathology
- Clinical Pharmacy
Background:
- Intralipid (parenteral fat emulsion) is commonly used for nutritional support in preterm infants.
- Potential adverse effects of Intralipid, particularly on pulmonary function, require thorough investigation.
Purpose of the Study:
- To investigate the presence and characteristics of lung fat accumulation in preterm infants following Intralipid infusion.
- To determine if Intralipid infusion, even at recommended rates, is associated with pulmonary lipid deposition.
Main Methods:
- Histological examination of lung tissue from preterm infants who died after Intralipid infusion.
- Analysis of lung homogenates for linoleic acid concentration as a marker for Intralipid.
- Comparison with infants who did not receive parenteral fat emulsion.
Main Results:
- Pulmonary fat accumulation, characterized by engorged capillaries with lipid globules, was found in all eight infants studied.
- Linoleic acid concentration was significantly higher in infants receiving Intralipid (p < 0.001).
- Fat accumulation occurred even when infusion rates were below recommended maximums and plasma was not visibly lipemic.
Conclusions:
- Intralipid infusion can lead to significant, potentially unrecognised, fat accumulation in the lungs of preterm infants.
- This pulmonary lipid deposition may exacerbate ventilation/perfusion inequalities, impacting respiratory function.
- Careful monitoring and consideration of infusion protocols may be warranted.
Abstract:
Eight preterm infants who died after 'Intralipid' infusion had fat accumulation in the lungs. The rate of infusion in six of the infants was below the recommended maximum for preterm infants and in no case was the plasma lipaemic on regular visual inspection. Histological examination revealed varying degrees of lung involvement. The commonest finding was distension of empty pulmonary capillaries, but specific staining techniques for fat showed that the capillaries were engorged with large lipid globules. Removal of accumulated fat by histiocytes was seen in infants dying some time after cessation of intralipid infusion. Analysis of homogenised lung showed that those who died after intralipid infusion had a significantly greater (p < 0.001) concentration of lioleic acid, a marker for intralipid, than infants who died without receiving parenteral fat solution. Fat accumulation after intralipid infusion may be common but unrecognised and may seriously exacerbate ventilation/perfusion inequalities.