NABF - Clinical: Sodium, Body Fluid

Test Catalog

Test Name

Test ID: NABF    
Sodium, Body Fluid

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

Not applicable

Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

It is important to remember that values determined by direct potentiometry-ion selective electrode will be higher in specimens with high protein and lipid concentrations than the corresponding serum specimen that is assayed by an indirect potentiometric method. The whole blood sodium values are the correct values.


Ion selective electrodes are selective but not absolutely specific for the ion in question. Other monovalent cations may react with the electrode but not in the physiologic range.

Clinical Reference Recommendations for in-depth reading of a clinical nature

Tietz Textbook of Clinical Chemistry. Edited by Burtis and Ashwood. Philadelphia, WB Saunders Co, 1994