Osmolality (Serum/Urine)

Test investigation

Osmolality (Serum/Urine)

Laboratory offering test

NNUH, QEH, JPUH

Units

mmol/kg

Comments precautions

Estimation of osmolar gap, investigation of hyponatraemia. Urine osmolality should always be interpreted with reference to a paired serum osmolality.

Sample type

Serum/random urine

Turnaround times (TAT) Urgent/Routine/GP or OPD

Within 4 hours/8 hours

Reference intervals

Serum osmolality 275 – 295 mmol/kg Urine osmolality – see comment on report or contact laboratory

If ukas accredited

Y NNUH