Testing Laboratory
Waitematā | Northshore HospitalDepartment
Chemical Pathology
Delphic Registration Code (Alpha Code)
SOS
Test Code (Numeric Code)
0122
Laboratory Handling
Sample Stability
24 hours
Synonyms
Plasma Osmolality
Serum Osmolality
Turnaround Time
4 hours
Specimen Type
- Plasma
- Serum
Specimen Requirements
Tube/Container Type:
Preferred
- Lithium Heparin - Non-gel (Green Cap)
Preferred if Waitākere
- SST II (Gold Cap)
Acceptable
- Plain (Red Top)
- SST II (Gold Cap)
Preferred Sample Volume (ml)
4
Minimum Sample Volume (ml)
1
Paediatric Specimen Requirements
Tube/Container Type:
Preferred
- Lithium Heparin PST- Gel (Light Green Cap)
Acceptable
- Plain (Red Top)
- SST II (Gold Cap)
Minimum Sample Volume (ml)
0.4
Last updated: 19/12/2025