Laboratory Medicine

Laboratory Test Catalogue

Sodium (Na)
Test Name Sodium (Na)
Specimen Type / Requirements Container Type = Gold (SST) Minimum Testing 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

Sodium (Na)

Test Name

Sodium (Na)

Specimen Type / Requirements

Container Type = Gold (SST)

Minimum Testing 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

Methodology

Potentiometry (Ion Selective Electrode)

Testing Location

SMH-Biochemistry

Other Information

Last Updated: June 06, 2019