Oxalate, Plasma




Test Mnemonic

OXLATE

CPT Codes

  • 83945 - QTY (1)

Aliases

  • Oxalic Acid

Performing Laboratory

Cleveland Clinic Laboratories


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
2.5 mLPlasmaGreen LiHep NogelPlace specimen on ice after draw.Frozen, CriticalPatient should avoid ingestion of vitamin C for 24 hours prior to sample collection. Fasting for 8 hours is recommended, but not required. Separate plasma from cells ASAP or within 1 hour of collection, transfer to standard aliquot tube, and freeze immediately.

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1.5 mL     

Stability

Environmental Condition Description
FrozenAfter separation from cells: 3 days at <-14 degrees C and 4 weeks at < -60 degrees C.
RefrigeratedAfter separation from cells: Unacceptable
AmbientAfter separation from cells: Unacceptable

Days Performed

Mon, Wed, Fri

Turnaround Time

1 - 4 days

Methodology

Name Description
Colorimetric Enzyme Assay 

Reference Range

Plasma Oxalate
Sex Age From Age To Type Range Range Unit
       Normal< 2.0umol/L

Special Info

CRITICAL FROZEN. Patient Prep: Patient should avoid ingestion of vitamin C for 24 hours prior to sample collection. Fasting for 8 hours is recommended, but not required, to avoid lipemia. Samples that are not plasma will be rejected.

Clinical Info

Used to assess the body pool size of oxalate.

Clinical Limitation

Patient should avoid ingestion of vitamin C for 24 hours prior to sample collection. Fasting for 8 hours is recommended, but not required, to avoid lipemia.