title: [The reliability of serum potassium levels measured in blood from a central venous catheter].
abstract: A clinical investigation was undertaken to assess the agreement between serum potassium (S-K) (1) in the peripheral venous blood and S-K in ten samples of 2 ml blood taken via a central venous catheter (2) where fluid containing potassium had been infused prior to taking the blood-samples (3). The results revealed that in order that S-K in 95% (twice the SD) of the samples taken from the central venous catheter is to fall within +/- 0.5 mmol/l as compared with S-K in the peripheral blood, it is necessary to discard the first 12 ml of blood withdrawn.
authors.affiliation: Anaestesiologisk/intensiv, kardiologisk og nefrologisk afdeling, Odense Sygehus.
authors.forename: H K
authors.initials: HK
authors.lastname: Nielsen
authors.forename: J
authors.initials: J
authors.lastname: Svanegaard
authors.forename: H H
authors.initials: HH
authors.lastname: Madsen
mesh_terms: D001800:Blood Specimen Collection / Q000379:methods* / Q000592:standards; D002405:Catheterization, Central Venous; D006801:Humans; D011188:Potassium / Q000097:blood*
chemical_list: D011188:Potassium
vernacular_title: Pålideligheden af serum-kalium bestemt på blod udtaget fra centralt venekateter.