title: Direct sodium measurement prevents underestimation of hyponatremia in critically ill patients.
authors: Department of Hematology and Clinical Chemistry Laboratories, Onze Lieve Vrouwe Gasthuis, Oosterparkstraat 9, 1091 AC, Amsterdam, The Netherlands, w.vandenancker@olvg.nl.
authors: W
authors: W
authors: van den Ancker
authors: I A
authors: IA
authors: Haagen
authors: P H J
authors: PH
authors: van der Voort
mesh_terms: D001784:Blood Gas Analysis; D016638:Critical Illness; D006801:Humans; D007010:Hyponatremia / Q000097:blood*; D007362:Intensive Care Units; D012189:Retrospective Studies; D012964:Sodium / Q000097:blood*; D014882:Water-Electrolyte Balance
chemical_list: D012964:Sodium