Shaveta Mulla 1 , Susan Stirling 2 , Sarah Cowey 1 , Rosie Close 1 , Sara Pullan 1 , Rosalind Howe 1 , Lynne Radbone 3 , Paul Clarke 1 Show Affiliations »
Abstract
OBJECTIVE: 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. DESIGN AND SETTING: Retrospective cohort study at a single tertiary-level neonatal unit. PATIENTS: Preterm infants given parenteral nutrition (PN) in the first postnatal week during two discrete 6-month epochs in 2013-2014. INTERVENTIONS: In epoch 1 the Ca2+:PO4 molar ratio of the PN formulation was ~1.3-1.5:1 (1.7 mmol Ca2+ and 1.1 mmol PO4 per 100 mL aqueous phase) and in epoch 2 was 1.0:1 via extra phosphate supplementation (1.7 mmol Ca2+ and 1.7 mmol PO4 per 100 mL). MAIN OUTCOME MEASURES: Peak calcium and nadir phosphate and potassium concentrations, and proportions with severe hypercalcaemia (Ca2+ >3.0 mmol/L), hypophosphataemia (PO4<1.5 mmol/L), and hypokalaemia (K+ <3.5 mmol/L) within the first postnatal week. RESULTS: 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). CONCLUSIONS: Reverting from a PN Ca2+:PO4 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 Ca2+:PO4 ratio may be preferable during the first postnatal week. © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.
OBJECTIVE: 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. DESIGN AND SETTING: Retrospective cohort study at a single tertiary-level neonatal unit. PATIENTS : Preterm infants given parenteral nutrition (PN) in the first postnatal week during two discrete 6-month epochs in 2013-2014. INTERVENTIONS: In epoch 1 the Ca2+ :PO4 molar ratio of the PN formulation was ~1.3-1.5:1 (1.7 mmol Ca2+ and 1.1 mmol PO4 per 100 mL aqueous phase) and in epoch 2 was 1.0:1 via extra phosphate supplementation (1.7 mmol Ca2+ and 1.7 mmol PO4 per 100 mL). MAIN OUTCOME MEASURES: Peak calcium and nadir phosphate and potassium concentrations, and proportions with severe hypercalcaemia (Ca2+ >3.0 mmol/L), hypophosphataemia (PO4 <1.5 mmol/L), and hypokalaemia (K+ <3.5 mmol/L) within the first postnatal week. RESULTS: 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). CONCLUSIONS: Reverting from a PN Ca2+ :PO4 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 Ca2+ :PO4 ratio may be preferable during the first postnatal week. © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.
Entities: Chemical
Disease
Species
Keywords:
amino acids; complications; hyperalimentation; phosphate; protein
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Year: 2017
PMID： 28456753 DOI： 10.1136/archdischild-2016-311107
Source DB: PubMed Journal: Arch Dis Child Fetal Neonatal Ed ISSN： 1359-2998 Impact factor: 5.747