Oxalate, Plasma
Test Mnemonic
OXLATE
CPT Codes
- 83945 - QTY (1)
Aliases
- Oxalic Acid
Performing Laboratory
Cleveland Clinic Laboratories
FDA Category
Laboratory Developed Test
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.