Prevention of hospital-acquired hyponatremia: a case for using isotonic saline.
OBJECTIVE
The current standard of care in pediatrics is to administer hypotonic saline in maintenance parenteral fluids. The safety of this approach has never been evaluated.


METHODS
A review of the literature reveals that the administration of hypotonic fluids is potentially dangerous and may not be physiologic for the hospitalized child.


RESULTS
There have been >50 reported cases of neurologic morbidity and mortality, including 26 deaths, in the past 10 years resulting from hospital-acquired hyponatremia in children who were receiving hypotonic parenteral fluids. Common childhood conditions requiring parenteral fluids, such as pulmonary and central nervous system infections, dehydration, and the postoperative state, are associated with a nonosmotic stimulus for antidiuretic hormone production, which can lead to free water retention and hyponatremia. Children are at particularly high risk of developing symptomatic hyponatremia as they have a larger brain-to-skull size ratio.


CONCLUSIONS
The administration of isotonic saline in maintenance parenteral fluids is the most important prophylactic measure that can be taken to prevent the development of hyponatremia in children who receive parenteral fluids.
Moritz
Michael L
ML
Division of Nephrology, Department of Pediatrics, Children's Hospital of Pittsburgh, University of Pittsburgh School Medicine, Pittsburgh, Pennsylvania 15213-2538, USA. moriml@chp.edu
Ayus
Juan Carlos
JC
D003428:Cross Infection / Q000453:epidemiology / Q000401:mortality / Q000517:prevention & control*; D006801:Humans; D007010:Hyponatremia / Q000453:epidemiology / Q000401:mortality / Q000517:prevention & control*; D007038:Hypotonic Solutions / Q000009:adverse effects; D007177:Inappropriate ADH Syndrome / Q000209:etiology / Q000517:prevention & control; D007262:Infusions, Intravenous; D007552:Isotonic Solutions; D012965:Sodium Chloride / Q000008:administration & dosage / Q000627:therapeutic use*
D007038:Hypotonic Solutions; D007552:Isotonic Solutions; D012965:Sodium Chloride