Senior Physician, 1st Internal Medicine Department, Ludovit Derer University Hospital, Bratislava, Slovakia
Hyponatremia is one of the most common laboratory deviations which can occur in critically ill patients. It is connected with higher morbidity and mortality so it is important to identify the right cause of this condition as fast as possible. This algorithm emphasizes the importance of discovering plasma and urine osmolality level, urine sodium level and also the possibility to consider extracellular plasma volume. After the correct diagnostic process this algorithm leads through the therapy of hyponatremia with orientation to the therapy of SIADH according to the european guidelines.