Sign in →

Test Code LAB4191 SODIUM (Na)

Specimen Type

Inpatient Specimens: 

  • Preferred: Dark Green Lithium Heparin Whole Blood 
  • Alternative: Lithium Heparin Plasma (Mint Green Top); Serum (SST, Gold, Corvac, Tiger, Red Top Tube)

Outpatient Specimens: 

  • Lithium Heparin Plasma (Mint Green Top); Serum (SST, Gold, Corvac, Tiger, Red Top Tube);

Specimen Volume

1.0 mL

Minimum Volume

0.5 mL

Turnaround Time

Inpatient: 

  • STAT: 1 hour
  • Routine : 4 hours

Outpatient: 

  • 24 hours 

Test Schedule

Daily and STAT

Sample Stability

Inpatient:

  • Whole blood: ≤ 30 minutes at 20-25°C, 1 hour at 2-8°C (on wet ice)

Outpatient: 

  • Room Temp: 2 weeks
  • Refrigerated: 2 weeks
  • Frozen: 1 year

Method

Inpatient: Direct potentiometry

Outpatient: Indirect ISE (Ion Selective Electrode)

Reference Ranges

Sodium, mmol/L
0-28 Days 133 - 146
28 Days-2 Years 139 - 146
2-18 Years 138 - 145
18-90 Years 132 - 142
>90 Years 132 - 146

Synonyms

Na

Test Components

Sodium, mmol/L.

CPT Codes

84295