Abstract
An elevated serum phosphorus (P) has been anecdotally described in premature infants receiving human milk fortified with donor human milk-derived fortifier (HMDF). No studies have prospectively investigated serum P in premature infants receiving this fortification strategy. In this single center prospective observational cohort study, extremely premature infants ≤1250 grams (g) birth weight (BW) were fed an exclusive human milk-based diet receiving HMDF and serum P levels were obtained. We evaluated 93 infants with a mean gestational age of 27.5 ± 2.0 weeks (Mean ± SD) and BW of 904 ± 178 g. Seventeen infants (18.3%) had at least one high serum P level with a mean serum P of 9.2 ± 1.1 mg/dL occurring at 19 ± 11 days of life. For all infants, the highest serum P was inversely correlated to the day of life of the infant (p < 0.001, R2 = 0.175) and positively correlated with energy density of HMDF (p = 0.035). Serum P was not significantly related to gender, BW, gestational age, or days to full feeds. We conclude that the incidence of hyperphosphatemia was mild and transient in this population. The risk decreased with infant age and was unrelated to gender, BW, or ethnicity.
Highlights
Human milk is the optimal source of nutrition for all infants, including preterm ones
This study aimed to evaluate how an exclusive human milk-based diet with human milk-derived fortifier (HMDF) can affect the risk of electrolyte abnormalities, serum phosphorus
Of 356 discrete levels during the use of HMDF, 291 (81%) serum phosphorus levels were within normal limits
Summary
Human milk is the optimal source of nutrition for all infants, including preterm ones. An exclusive human-milk based diet is defined as mother’s own milk (or pasteurized donor milk when mother’s own milk is unavailable) fortified with a donor human milk-derived fortifier (HMDF), containing no preterm formula or cow milk protein-based fortifiers. This approach provides advantages over cow milk-containing products providing optimal growth rates, a lower rate of necrotizing enterocolitis, and decreased days of parenteral nutrition. Such an approach leads to lowered sepsis rates, decreased mortality, and shorter hospital stays [2,3,4,5,6,7]. This study aimed to evaluate how an exclusive human milk-based diet with HMDF can affect the risk of electrolyte abnormalities, serum phosphorus
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