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Related Experiment Videos

Hypotonic intravenous solutions in children.

Stephen D Playfor1

  • 1Paediatric Intensive Care Unit, Royal Manchester Children's Hospital, Hospital Road, Pendlebury, Manchester M27 4HA, UK. Stephen.Playfor@cmmc.nhs.uk

Expert Opinion on Drug Safety
|December 19, 2003
PubMed
Summary

Hypotonic intravenous fluids, like 4% dextrose/0.18% saline, are standard in UK pediatrics but cause dangerous hyponatremia. These fluids retain free water, leading to severe illness and death in children.

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Area of Science:

  • Pediatric fluid management
  • Intravenous therapy
  • Hyponatremia

Background:

  • Hypotonic intravenous solutions, particularly 4% dextrose/0.18% saline, are commonly used in UK pediatric units.
  • Their use stems from 1950s calculations for fluid and electrolyte maintenance.
  • These calculations do not account for antidiuretic hormone (ADH) effects during illness or surgery.

Purpose of the Study:

  • To critically evaluate the routine use of hypotonic intravenous fluids in pediatric care.
  • To highlight the risks associated with current standard practices.
  • To challenge the continued use of solutions like 4% dextrose/0.18% saline.

Main Methods:

  • Review of historical fluid calculation methodologies.
  • Analysis of the physiological impact of hypotonic fluids, considering ADH.
  • Examination of clinical outcomes associated with hypotonic fluid administration.

Main Results:

  • Hypotonic fluids, despite being isosmolar to plasma, are hypotonic relative to cell membranes.
  • ADH stimulation during illness leads to free water retention and hyponatremia.
  • Routine use of these fluids is linked to severe morbidity and mortality in children.

Conclusions:

  • There is no evidence to support the routine administration of hypotonic intravenous fluids in pediatric patients.
  • The practice poses significant risks, including potentially fatal hyponatremia.
  • Clinical guidelines should be revised to reflect current understanding of fluid physiology.

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