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Sodium, Serum / Plasma
|Performed by||Parnassus, Mission Bay & Mt. Zion Chemistry|
|In House Availability||Test available 24 hours per day 7 days per week|
|Method||Ion Specific Electrode (ISE)|
|Container type||Gold top or Light Green top|
|Amount to Collect||1 mL blood Click here for Microdetermination info|
|Sample type||Serum or plasma|
|Preferred volume||0.5 mL serum or plasma|
|Min. Volume||0.2 mL serum or plasma Click here for Microdetermination info|
1. Normal range for children less than 1 year old adapted from Beckman Coulter's "Pediatric Reference Range Guidelines for Synchron Systems" Bulletin 9345
2. Normal range for adults was determined by testing 271 male and female healthy blood donors at UCSF.
|Critical value||< 125 mmol/L or > 155 mmol/L|
|Synonyms||Na; Electrolytes; Anion gap|
|Stability||Room temperature 8 hours, refrigerated 2 days, frozen at -20C 1 week|
|Turn around times||STAT 1 hour, Routine 4 hours|
|Additional information||Severely lipemic serum/plasma samples will be treated and reassayed.
High levels of glucose can lower electrolyte concentrations, each 100 mg/dL causing an apparent decrease in serum sodium of 1.6 mmol/L Ref: Schrier RW: Manual of Nephrology, Boston, Little Brown, 1981
The anion gap is calculated from the serum Sodium, Chloride and Total CO2 values using the equation: Na-(CL+CO2). The calculation is automatic whenever all three of the electrolytes are ordered together. It is not a separately orderable test. Normal range for the Anion Gap is 4-14.
|Last Updated||1/28/2015 3:29:16 PM|
|Lab Procedure Link||Click here for Procedure|