Hypo- and hypernatremia are the most frequent electrolyte disorders found in hospitalized
patients. The increasing use of diuretics and other medications influencing the water and
sodium homeostasis potentially lead to a rise in the prevalence of the electrolyte disorders.
Only little data is available on the frequency and the mechanisms leading to
Thus, the investigators aim to A.) determine the frequency of hypo- and hypernatremia in the
emergency department of a large tertiary university hospital and B.) explore the mechanisms
leading to the development of dysnatremias by detailed clinical and laboratory examinations.