title: Simpler flame photometric determination of erythrocyte sodium and potassium: the reference range for apparently healthy adults.
abstract: Separated erythrocytes are washed repeatedly with iso-osmolar magnesium chloride solution, lysed by adding saponin, and sodium potassium measured in the diluted hemolysate by flame photometry. The coefficient of variation for the method was less than 4%. Reference intervals determined for a healthy population and hospitalized (elective surgery) patients without electrolyte disorders were 4.6-7.8 mmol/liter for erythrocyte sodium concentration and 94-110 mmol/liter for erythrocyte potassium concentration (2.5-97.5 percentiles).
mesh_terms: D000328:Adult; D004912:Erythrocytes / Q000032:analysis*; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D010783:Photometry; D011188:Potassium / Q000097:blood*; D012016:Reference Values; D012964:Sodium / Q000097:blood*
chemical_list: D012964:Sodium; D011188:Potassium