Management of electrolyte disorders: also the method matters!

Acta Clinica Belgica
Joris Richard Delanghe

Abstract

For the last few decades, electrolyte determinations in plasma or serum are carried out by reliable potentiometric methods. In recent years, a marked technical evolution has taken place, where the clinical analysis of common analytes (e.g. electrolytes) is partly moving from centralised clinical core laboratories to near-patient point-of-care testing. As the measuring principle used by point-of-care testing markedly differs from the one used in core laboratories, sodium results are not always interchangeable in critically ill patients due to the different sensitivity of the analytical methods for the electrolyte exclusion effect. This effect mainly occurs in patients with decreased plasma protein values. The observed differences in generated test results might significantly affect the judgment and the treatment of electrolyte disturbances. As technical solutions are not likely to occur in the near future, clinicians and laboratorians should be well aware of this growing problem. Mathematical correction of the sodium results for plasma protein concentration may resolve the problem to a certain extent. Although electrolyte determinations are generally very reliable, analytical interferences can occur for sodium rarely, mainly due...Continue Reading

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Citations

Nov 5, 2019·Critical Reviews in Clinical Laboratory Sciences·Bridgit O CrewsDina N Greene
Aug 15, 2021·Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS)·Wesley Zongrong YuSunil Kumar Sethi

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