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Laboratory: Clinical Biochemistry
Test Name:
Test Code: NAWB
Clinical Information:
Only available in rural Manitoba.  For WRHA and Westman Lab see Sodium - (P)

State whether the sample is venous or arterial.
Collection Devices:
Specimen Required: Skin puncture: lancet and capillary collection tube (plain, lithium heparin, or balanced heparin for electrolytes and blood gases)
Venipuncture:  lithium or sodium heparin collection tubes and disposable transfer device
(e.g. 1cc syringe and a 16 to 20 gauge needle)
Arterial puncture:  Plain syringe or blood gas syringe with heparin and labeled for the assays performed

Only available at sites which perform iStat testing onsite.
Reference Values:
Venous & Capillary:  138 - 146 mmol/L

Arterial:   138 – 146 mmol/L

Note:  Reference ranges are specific to the Abbott iStat (POC instrument)
Turn around time (TAT): < 60 minutes
See Also:
More Information:
Substance Concentration Producing Interference Maximum Expected In Vivo
β-hydroxybutyrate 16 mmol/L Decrease (-) Na by 5 mmol/L
Lactate 20 mmol/L Decrease (-) Na by 5 mmol/L
Bromide 37.5 mmol/L Increase (+) Na by 5 mmol/L