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Laboratory Medicine

Laboratory Test Catalogue

Sodium (Na)

Test Name

Sodium (Na)

Gold Tube Specimen Type / Requirements

Container Type = Gold (SST)

Minimum Volume = 1ml Serum

Tube must fill to at least ½ or greater of its vacuum capacity

Specimen Handling

Collection Instructions: Serum or plasma, free from hemolysis, collected with or without gel separator. For plasma use lithium or ammonium heparin only. Separate serum or plasma from cells within 2 hours of collection

Write your initials, date and time of collection on the collection label.

Stability: Stable at room temperature for 24 h, refrigerated for 1 week and frozen at -15 to -20°C for 6 months.

Transportation: Transport at room temperature ASAP.

Laboratory Staff Instructions: Separate serum or plasma from cells within 2 hours of collection.

Sample Rejection Criteria: Gross hemolysis and/or Non sufficient Quantity (Not Sufficient Quantity) will be cancelled.

Required Documentation

Turnaround Time (TAT)

45 minutes Trauma/Stat, 2 hour routine

Test Utilization

Reference Value

Adult 135-145 mmol/L

0 – D1 133 – 142 mmol/L

Critical Value

Serum < 120 mmol/L and >160 mmol/L

Test Code

NA

Methodology

Potentiometry (Ion Selective Electrode)

Testing Location

SMH-Biochemistry

Other Information

Last Updated: June 06, 2019