Calculated Osmolarity

Testing Laboratories

Waitematā | Northshore Hospital
Waitematā | Waitakere Hospital

Department

Chemical Pathology

Delphic Registration Code (Alpha Code)

COS

Test Code (Numeric Code)

0123

Laboratory Handling

Sample Stability

4 hours

Synonyms

Osmolarity

Turnaround Time

2 hours

Specimen Type

  • Plasma
  • Serum

Specimen Requirements

Tube/Container Type:

Preferred
  • Lithium Heparin - Non-gel (Green Cap)
Acceptable
  • Plain (Red Top)
  • SST II (Gold Cap)

Paediatric Specimen Requirements

Tube/Container Type:

Preferred
  • Lithium Heparin PST- Gel (Light Green Cap)
Acceptable
  • Plain (Red Top)
  • SST II (Gold Cap)

Last updated: 16/02/2026