Risk of acute hyponatremia in hospitalized children and youth receiving maintenance intravenous fluids.

Hospital-acquired acute hyponatremia is increasingly recognized as a cause of morbidity and mortality in children. It has been attributed primarily to the use of hypotonic intravenous (IV) fluids to maintain fluid and electrolyte requirements. This practice point outlines current understanding of the problem and summarizes recent research dealing with this issue. Detailed recommendations are made for the prescription of IV maintenance fluids in children between one month and 18 years of age. The use of isotonic fluid (D5W.0.9% NaCl) is recommended in most circumstances. Hypotonic IV fluids containing less than 0.45% NaCl should not be used to provide routine IV fluid maintenance requirements.