Spurious electrolyte disorders: a diagnostic challenge for clinicians

Area of Science:

• Clinical Chemistry
• Laboratory Medicine
• Internal Medicine

Background:

• Spurious electrolyte disorders involve artifactually altered serum electrolyte values.
• These discrepancies do not reflect actual systemic electrolyte levels.
• They are frequently encountered in clinical practice.

Purpose of the Study:

• To highlight the importance of identifying spurious electrolyte disorders.
• To prevent misdiagnosis and inappropriate therapeutic interventions.
• To guide clinicians in interpreting electrolyte abnormalities.

Main Methods:

• Review of clinical scenarios involving electrolyte disturbances.
• Analysis of the diagnostic implications of artifactual electrolyte values.
• Emphasis on clinical-laboratory correlation.

Main Results:

• Spurious electrolyte disorders can mimic true electrolyte imbalances (e.g., pseudohyponatremia, pseudohyperkalemia).
• Failure to recognize artifacts can lead to adverse patient outcomes.
• Normal electrolyte levels in predisposed patients may indicate true underlying disorders.

Conclusions:

• Clinicians must consider artifact as a primary differential diagnosis for electrolyte abnormalities.
• Alertness to spurious results is crucial when lab values conflict with clinical presentation.
• Understanding spurious electrolyte disorders improves diagnostic accuracy and patient safety.