Oxalate, Plasma | Cleveland Clinic Laboratories

Oxalate, Plasma Print

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 mL	Plasma	Green LiHep Nogel	Place specimen on ice after draw.	Frozen, Critical	Patient 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
Frozen	After separation from cells: 3 days at <-14 degrees C and 4 weeks at < -60 degrees C.
Refrigerated	After separation from cells: Unacceptable
Ambient	After 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	< 2.0	umol/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.