Oxalate (Blood)

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Testing Laboratory

Auckland Te Toka Tumai | Auckland Hospital

Department

Chemical Pathology

Delphic Registration Code (Alpha Code)

POX

Test Code (Numeric Code)

3048

Laboratory Handling

Phlebotomy

EDTA tube on ice.

Transport

Deliver immediately to the laboratory. Delay may cause falsely elevated results due to degeneration of oxalate from precursors.

Separating

Plasma should be centrifuged promptly at 4 °C, separated from the cells immediately, and then frozen.

Laboratory

LabPLUS Special Techniques

Sample Stability

Plasma oxalate is unstable. Separate immediately and freeze plasma. Minimise delay.

Synonyms

Oxalate-plasma

Turnaround Time

2 weeks

Performed as required

Specimen Type

  • Plasma

Specimen Type

  • Plasma

Specimen Requirements

Tube/Container Type:

Preferred
  • EDTA (Lavender Cap)
Preferred Sample Volume (ml)

4

Paediatric Specimen Requirements

Tube/Container Type:

Preferred
  • EDTA (Lavender Cap)
Acceptable
  • EDTA (Microtainer)
Preferred Sample Volume (ml)

2

Pre-testing Requirements

NOTE: plasma oxalate is not available as a routine test. It must be pre-arranged with a LabPLUS Chemical Pathologist

Last updated: 31/08/2026