Osmolality (blood)


Investigation of hyponatraemia or suspected alcohol/ethylene glycol ingestion

Osmotically active substances include sodium, urea, and glucose; as well as methanol, ethanol and ethylene glycol.

Reference ranges:

Age range Reference range (mmol/kg)
All ages/sexes 285 - 295

Derived from Pathology Harmony 2011

Results outside the reference range do not necessarily indicate disease. Similarly, results within the reference range do not preclude abnormality. Please contact the Duty Biochemist for discussion of individual patient results

Other Comments:

For more information, please see the following: Osmolality - Lab Tests Online

See also: osmolality (urine)

About This Test

Department: Biochemistry


  • Gel/clotted/lithium heparin (yellow/red/green top)

Turnaround Time:

Within 24 hours