Blood Sciences Test


Sodium

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Units

mmol/L

Reference Range

133 – 146 mmol/L

Test Usage

How should I investigate a patient with low serum sodium?

Answer: We recommend:

Depending on result:

How should I investigate a patient with raised serum sodium?

Answer: Hypernatraemia can be defined as a serum sodium > 145 mmol/L

We recommend:

Depending on result:

Persistent serum Na 146-148 mmol/L without clinical features of hypovolaemia may reflect a statistical population outlier.

Serum Na 149 – 154 mmol/L

Serum Na > 155 mmol/L

Availability

Local test

Turn around Time

1 day

Can be added on to an existing request up to 4 days following sample receipt

Specimen Labelling Procedure