alexa Metabolic responses to early and high protein supplementation in a randomized trial evaluating the prevention of hyperkalemia in extremely low birth weight infants.


Journal of Neonatal Biology

Author(s): Blanco CL, Falck A, Green BK, Cornell JE, Gong AK

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Abstract OBJECTIVE: To determine whether early and higher intravenous amino acid (EHAA) supplementation decreases hyperkalemia in extremely low birth weight (ELBW) infants (<1000 g). STUDY DESIGN: Infants were enrolled at birth in a randomized, double-masked, prospective fashion and treated for 7 days. The standard group (SAA) infants received intravenous amino acid (AA) starting at 0.5 g x kg(-1) x d(-1) and increased by 0.5 g x kg(-1) every day to a maximum of 3 g x kg(-1) x d(-1). EHAA group infants received 2 g x kg(-1) x d(-1) of AA soon after birth and advanced by 1 g x kg(-1) every day to 4 g x kg(-1) x d(-1). Data analysis was by SPSS 11.5, with statistical significance at alpha = 0.05 and 90\% power to determine a difference in mean K(+) level of 2. RESULTS: Sixty-two patients, mean gestational age of 26.0 +/- 2.0 weeks and birth weight of 775 +/- 136 g, were enrolled. Hyperkalemia (K(+) > or =6.5 mEq/L) occurred in 13\% of the studied population; no difference in incidence of hyperkalemia was found between the SAA and EHAA groups (16\% vs 10\%, respectively, P = .70). Serum blood urea nitrogen was higher in the EHAA group. AA infusion was stopped early in 6 patients for high blood urea nitrogen or elevated ammonia level. CONCLUSIONS: During the study period, hyperkalemia decreased significantly and was not affected by EHAA supplementation in the first week of life. TRIAL REGISTRATION: NCT00290160. This article was published in J Pediatr and referenced in Journal of Neonatal Biology

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