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Laboratory Test Reference Guide

Laboratory Information

Test Name

Osmolality

External Price (excl. GST)

8.17

Specimen Collection

Adult Specimen

Heparin (light green), SST (gold)

Paediatric Specimen

0.3 ml Heparin (light green) or Plain(red or Gold SST).

Test Information

Department

Biochemistry

Test Availability

Mon - Sun, 24hrs

Laboratory Turnaround Time

1 day, or 90 minutes for a Water Deprivation test.

Method

Freezing point depression

Reference interval

280 - 300 mmol/kg

Uncertainty of measurement

+/- 3 mOsm/kg

Minimum Volume

0.1 mL serum or plasma

Electronic Information

Registration Code

OS

HL7 mapping code

$OS