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Related Experiment Videos

[Ringer solution: osmolarity and composition revisited].

M G Kees1, H Schlotterbeck, R Passemard

  • 1Département d'anesthésie-réanimation, hôpital de Hautepierre, 67000 Strasbourg, France.

Annales Francaises D'Anesthesie Et De Reanimation
|May 7, 2005
PubMed
Summary

Ringer solution from Maco Pharma was mislabeled as isotonic. This hypotonic fluid poses risks, especially for patients sensitive to free water infusion during anesthesia and intensive care.

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Area of Science:

  • Medical Science
  • Pharmacology
  • Intensive Care Medicine

Background:

  • Ringer solution, a common crystalloid fluid in anesthesia and intensive care, exhibits manufacturer-dependent composition variations.
  • Accurate knowledge of electrolyte content and fluid characteristics is crucial before administration.

Purpose of the Study:

  • To highlight discrepancies in the osmolarity and tonicity information provided by the manufacturer for a specific Ringer solution (Ringer Maco Pharma).
  • To alert healthcare professionals to the potential dangers of using this mislabeled hypotonic fluid.

Main Methods:

  • Theoretical osmolarity calculation based on electrolyte content.
  • Measurement of the fluid's osmolality.
  • Comparison of calculated and measured values against manufacturer-stated values.

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Main Results:

  • The Ringer Maco Pharma solution was found to be hypotonic, with a theoretical osmolarity of 221.4 mOsm/l and measured osmolality of approximately 208 mmol/kg.
  • This contradicts the manufacturer's claim of isotonicity and an osmolarity of 276.8 mOsm/l.

Conclusions:

  • The manufacturer's information regarding tonicity and osmolarity for Ringer Maco Pharma was inaccurate.
  • Administration of this hypotonic fluid can be dangerous for patients with conditions poorly tolerating free water infusion.