Osmolality
13.17
Heparin (light green), SST (gold)
0.3 ml Heparin (light green) or Plain(red or Gold SST).
Biochemistry
Mon - Sun, 24hrs
1 day, or 90 minutes for a Water Deprivation test.
Freezing point depression
mmol/kg
280 - 300 mmol/kg
+/- 4 mmol/kg
Measured osmolality is not available at rural hospital laboratories. A calculated osmolality ((Sodium x 2) + glucose + urea) is available at the rural hospital laboratories for patients in whom hyperosmolar hyperglycaemic state is suspected.
0.1 mL serum or plasma
OS
$OS
