Sodium (urine)

Specimen

Random or 24 hr

Units

mmol/24h

Reference Range

40 -220 mmol/24h

Test Usage

In a well person, urine sodium output reflects dietary intake.

A low output, <20 mmol/day, may be an indicator of a total body sodium deficit but interpretation requires consideration of all fluid and electrolyte parameters.

Turnaround time

1 day

Availability

Local test

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