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Sodium Serum

Order Code CH181
Turnaround Time 24 hours
Test Includes

Sodium Serum

Specimen Requirements
Specimen Source
Serum, Plasma
Transport Container
(Specimen Container)

SST (Tiger Top)/ Lithium Heparin/ Sodium Heparin

Preferred Specimens
Minimum Volume (uL)
.5 mL
Collection Instructions
(Transport Temperature)
Transport Refrigerated (cold packs)
Specimen Stability
Temperature Period
Room temperature 2 weeks
Refrigerated 14 days
Frozen > 1 year
Test Details
Ion-selective electrode diluted (Indirect)
Clinical Significance

Sodium is the major cation of extracellular fluid; it plays an essential role in the normal distribution of water and in the maintenance of osmotic pressure in extracellular fluid compartments. Decreased levels of sodium may be caused by an excessive use of diuretics, prolonged vomiting, a decrease in the intake of sodium in the diet, and metabolic acidosis. Increased levels of sodium may be found in Cushing’s syndrome, severe dehydration, or in high levels of salt intake without an adequate supply of water.

Reference Ranges

139 – 146 mmol/L (0 Years – 2 Years)
138 – 145 mmol/L (2 Years – 11 Years)
136 – 145 mmol/L (11 Years – 90 Years)
132 – 146 mmol/L (90 Years – No Max Age Limit)