Abstract
Eleven frequently used formulas were chosen. Ten consecutive measurements were performed for each formula. Simulated real-life practice tube feeding was performed by using an infusion pump connected to a feeding tube. A Human Milk Analyzer, using an infrared spectroscopy method, was used to compare the preinfusion and postinfusion macronutrient contents of the different formulas. A total of 220 measurements were performed. Variations in at least one macronutrient were observed in 5 out of 10 formulas. Fat and energy content were modified in 1 preterm formula. Changes in the macronutrient content after tube feeding transfer were observed for some infant formulas, including those designed for very low birth weight infants. These alterations might relate to specific formulation of each formula. The biological significance of our results to the very low birth weight infants should be studied further.
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