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- W2608843917 abstract "<h3>Objective</h3> To compare in two epochs of differing phosphate provision serum calcium, phosphate, potassium, and sodium concentrations and the frequency of abnormality of these electrolytes and of sepsis in preterm infants who received an optimised higher amino acid-content formulation. <h3>Design and setting</h3> Retrospective cohort study at a single tertiary-level neonatal unit. <h3>Patients</h3> Preterm infants given parenteral nutrition (PN) in the first postnatal week during two discrete 6-month epochs in 2013–2014. <h3>Interventions</h3> In epoch 1 the Ca<sup>2+</sup>:PO<sub>4</sub> molar ratio of the PN formulation was ~1.3–1.5:1 (1.7 mmol Ca<sup>2+</sup> and 1.1 mmol PO<sub>4</sub> per 100 mL aqueous phase) and in epoch 2 was 1.0:1 via extra phosphate supplementation (1.7 mmol Ca<sup>2+</sup> and 1.7 mmol PO<sub>4</sub> per 100 mL). <h3>Main outcome measures</h3> Peak calcium and nadir phosphate and potassium concentrations, and proportions with severe hypercalcaemia (Ca<sup>2+</sup> >3.0 mmol/L), hypophosphataemia (PO<sub>4</sub><1.5 mmol/L), and hypokalaemia (K<sup>+</sup> <3.5 mmol/L) within the first postnatal week. <h3>Results</h3> In epoch 2, peak calcium concentrations were lower than in epoch 1 (geometric means: 2.83 mmol/L vs 3.09 mmol/L, p value<0.0001), fewer babies were severely hypercalcaemic (10/49, 20%, vs 31/51, 61%, p value<0.0001); nadir plasma phosphate concentrations were higher (means: 1.54 mmol/L vs 1.32 mmol/L, p value=0.006), and there were fewer cases of hypophosphataemia (17/49, 35% vs 31/51, 61%, p value=0.009) and hypokalaemia (12/49, 25% vs 23/51, 45%, p value=0.03). <h3>Conclusions</h3> Reverting from a PN Ca<sup>2+</sup>:PO<sub>4</sub> molar ratio of 1.3–1.5:1 to a ratio of 1.0:1 was associated with a lower incidence and severity of hypophosphataemia and hypercalcaemia. For preterm infants given higher concentrations of amino acids (≥2.5 g/kg/day) from postnatal day 1, an equimolar Ca<sup>2+</sup>:PO<sub>4</sub> ratio may be preferable during the first postnatal week." @default.
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- W2608843917 date "2017-04-29" @default.
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- W2608843917 title "Severe hypercalcaemia and hypophosphataemia with an optimised preterm parenteral nutrition formulation in two epochs of differing phosphate supplementation" @default.
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- W2608843917 doi "https://doi.org/10.1136/archdischild-2016-311107" @default.
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