Sodium (serum)

 

Alternative names, keywords

Na

Samples required

Clotted blood (gold cap, 5 mL tube). Smaller tubes are available for paediatric samples.

Test indications

 

Factors affecting test performance/ results

Pseudohyponatremia may be seen with lipaemic specimens as a result of fluid displacement.

Altered protein‑/lipid levels may falsely shift sodium results into the opposite direction; i.e. elevated protein level causing pseudohyponatraemia, decreased protein level causing pseudohypernatraemia.

Results should always be assessed in conjunction with the patient’s medical history, clinical examination and other findings.

Reference range

136 -145 mmol/L
Source: Roche Cobas® ISE insert, 2022-01, V13.0

Turnaround time

Same day (within 1h if urgent)

Enquiries

Biochemistry (Automation)