Sodium, Whole Blood

Sunquest Code:NAW  
Epic Code:LAB3629Epic Name:Sodium Whole Blood
Methodology:Direct ion selective electrode
Turnaround Time:Performed and reported 24 hours/day.
Special Instructions:UMMC only: Arterial or venous blood collected in a dry lithium heparin syringe for blood gas or ionized calcium analysis may be used for sodium, potassium or glucose analysis simultaneously.

Collection Instructions

Optimal Volume:1 mL
Minimum\Peds Volume:0.2 mL (tuberculin syringe)
Container:Dry heparin syringe
[Alternate Containers: Capillary (lithium heparin) gas tube, Green (lithium heparin, gel), Green (lithium heparin) on ICE]
Collection Instructions:Must be delivered to the laboratory within 2 hours of collection. Plasma samples are acceptable if processed within 2 hours of collection.

Processing and Shipping

Specimen Processing:Whole blood. Do not process. Do not store.
Test Performed at or Referral Lab Chemistry  (UMMC-East Bank, Northland, UMMC/UMMCH-West Bank, UMMC NICU, M Health Clinic and Surgery Center)


Critical Range:Less than 120 mmol/L and greater than 160 mmol/L
Reference Range:



0 30 d


1 mo – 15 y


16 y and older




Use:Evaluate sodium metabolism and drugs or diseases that alter it.

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