Abstract
Hyponatremia presents a complex diagnostic challenge due to its broad differential diagnosis and the difficulties of its evaluation. The available diagnostic algorithms often have substantial limitations. Therefore, clinicians frequently struggle to distinguish the underlying causes of hyponatremia, leading to diagnostic and management errors that contribute to considerable morbidity and mortality. Here, we review the physiology of water and salt balance, as well as the pathophysiology of hyponatremia. Then, we discuss important diagnostic pitfalls, shortcomings, and limitations in hyponatremia patients. Finally, to enhance diagnostic accuracy and support clinical decision-making, we developed a user-friendly, novel web-based application incorporating a comprehensive set of laboratory and clinical parameters. This intuitive tool is designed to streamline the diagnostic process and improve patient outcomes in cases of hyponatremia. Further validation of the tool is necessary to definitively establish its utility in routine clinical practice.
Keywords
Hyponatremia, Syndrome of inappropriate antidiuresis, Reset osmostat, Renal salt wasting, Ecstasy, Mineralocorticoid deficiency, Thiazide diuretics, Tea and toast, Beer potomania, Novel diagnostic application