Sodium, serum
Clinical Background:
Sodium is the major extracellular cation in the body and along with its associated anions, contributes to most of the plasma osmolality and therefore plays an important role in water and electrolyt...
Sodium is the major extracellular cation in the body and along with its associated anions, contributes to most of the plasma osmolality and therefore plays an important role in water and electrolyte homeostasis. Measurement of serum sodium is used in the investigation of fluid and electrolyte balance.
Test Details
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Discipline:
Biochemistry
Biochemistry
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Specimen Container Adult:
Serum (SST or plain tube)
Serum (SST or plain tube)
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Specimen Container Paediatric:
Serum (SST or plain tube)
Serum (SST or plain tube)
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Minimum Volume Adult:
1 mL blood
1 mL blood
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Minimum Volume Paediatric:
0.5 mL blood
0.5 mL blood
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Sample Stability:
Unseparated samples: 4 days
Separated samples:
- at 15-25C: 14 days
- at 2-8C: 14 days
- at -20C: 1 year
Unseparated samples: 4 days
Separated samples:
- at 15-25C: 14 days
- at 2-8C: 14 days
- at -20C: 1 year
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Quality Assurance:
WEQAS
WEQAS
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Reference Ranges:
133 - 146 mmol/L
133 - 146 mmol/L
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Other Info:
Lithium heparin plasma samples also acceptable
Lithium heparin plasma samples also acceptable
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Routine Contact Name:
Duty Biochemist
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Routine Telephone:
Freeman: 0191 244 8889
RVI: 0191 282 9719Freeman: 0191 244 8889
RVI: 0191 282 9719 -
Routine Email: