Test directory: Sodium

Ordering Code 169
Test Name Sodium
Alias Na
Sodium ISE
Preferred Specimen Serum
Preferred Container SST (Gold)
Other Specimen/Container Serum in Plain (Red), Plasma in Lithium Heparin (Green-PST),
Plasma in Lithium Heparin (Dark Green-PP No Gel)
Optimum Volume 1 mL
Handling Instructions All specimen types must be centrifuged within 2 hours of collection. If no gel separation present in tube and testing is delayed, plasma/serum is aliquoted from cells within 2 hours of collection.
Transport Requirements Oahu: Refrigerated
Airline: Refrigerated
Specimen Stability Refrigerated: 1 Week
Frozen: 3 Months (Aliquot)
Frozen samples should be thawed once.
Rejection Criteria Moderately hemolyzed, Insufficient quantity, Specimen older than stability limits
Avail. Stat YES
Analytic Time 1 Day
Methodology Ion Selective Electrode

Reference range(s)

Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Sodium >=19Y 136-145 <= 120 >= 160 136-145 >= 160 <= 120 mEq/L
Sodium 0-18Y 136-145 <= 130 >= 150 136-145 >= 150 <= 130 mEq/L