SODIUM, BLOOD

Mnemonic

NA

Synonym

Na+ - Serum Sodium Cation - Serum Sodium Electrolyte

Specimen Collection Requirements

Collect

Serum or Plasma, one 5.0 mL gold (SST), 7.0 mL red or 3.0 mL mint green (lithium heparin, PST) top tube

Handling

Allow serum to clot completely at room temperature (minimum: 30 minutes). Preferably, separate serum or plasma from cells before transport.

Preferred Volume

0.5 mL

Minimum Volume

0.2 mL

Transport

Refrigerated (2-8°C)

Rejection Criteria

Grossly hemolyzed specimens

Stability

AFTER SEPARATION FROM CELLS: Ambient (18-25°C): 24 hours; Refrigerated (2-8°C): 7 days; Frozen (at or below -20°C): 2 months

Testing Information

Performed

7 days/week

Method

Ion Selective Electrode

Referral Lab

Samaritan Health Services Laboratories

Reference Values

Reference Values

Adult: 135-145 mmol/L
Age adjusted ranges.

Critical Values

ADULT:
Low: ≤125 mmol/L
High: ≥150 mmol/L

CPT Codes

84295

Last Updated: Thursday, January 5, 2017 03:42:30 AM