Introduction: The Precision Paradox in Critical Care
In the high-stakes environment of the Intensive Care Unit (ICU), electrolyte management is a cornerstone of patient stabilization. Sodium (Na+) and potassium (K+) ions regulate everything from cellular membrane potential to fluid balance and neurological function. However, clinicians often face a dilemma: should they trust the rapid results from a point-of-care (POC) blood gas analyzer or wait for the central laboratory’s report? While these two methods are often used interchangeably in clinical practice, a growing body of evidence, including recent prospective data, suggests that analytical biases between these technologies can lead to significant clinical discrepancies.
