Secondary Outcome(s)
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Fluid retention (g) measured by the weight change
[Time Frame: 0-7 days: Body weight is measured daily (at 7 am) during the intravenous fluid therapy from randomization up to seven days.]
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Proportion of children who needed change of the study fluid treatment
[Time Frame: From randomization up to seven days.]
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Alkalosis measured by base excess (BE) in blood gas analysis
[Time Frame: 1-3 days after study entry]
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Concentration of copeptin in plasma samples
[Time Frame: 6-24 hours after study entry]
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Proportion of children with hypokalemia
[Time Frame: 0-7 days from study entry]
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Proportion of children with hyponatremia
[Time Frame: Plasma sodium and potassium concentrations are assessed daily (at 7 am) during the intravenous fluid therapy from randomization up to seven days.]
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Number of deaths
[Time Frame: 0-30 days from study entry]
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Acidosis measured by pH in blood gas analysis
[Time Frame: 1-3 days after study entry]
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Duration of intravenous fluid therapy
[Time Frame: From randomization up to seven days.]
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Proportion of children with severe hypokalemia
[Time Frame: 0-7 days from study entry]
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Concentration of bicarbonate (HCO3) in plasma samples
[Time Frame: 1-3 days after study entry]
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Proportion of children admitted to ICU
[Time Frame: From randomization up to seven days.]
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Proportion of children with hypernatremia
[Time Frame: Plasma sodium and potassium concentrations are assessed daily (at 7 am) during the intravenous fluid therapy from randomization up to seven days.]
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Time to discharge from hospital in hours
[Time Frame: From randomization up to seven days.]
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