Oxalate, Plasma
Also known as: POXAL
Use
The plasma oxalate test is used to assess the body pool size of oxalate, which is an important factor in diagnosing and monitoring kidney stone disease (nephrolithiasis). Elevated levels of oxalate in plasma can lead to kidney stones, and understanding its concentration helps in the clinical management of such conditions. This test is particularly relevant for patients who are at risk of oxalate-related renal complications.
Special Instructions
The patient should avoid ingestion of vitamin C for 24 hours before sample collection to ensure the accuracy of the test results. Proper handling and immediate processing of the specimen are critical to maintain its integrity.
Limitations
This test has not been cleared or approved by the US Food and Drug Administration but is performed in a CLIA-certified laboratory, ensuring it meets the required standards for clinical purposes. The accuracy of the test may be affected by improper specimen handling, especially if the specimen is not kept frozen or separated from cells within the specified time.
New York Approved
Methodology
Other
Biomarkers
LOINC Codes
- 15085-4
Result Turnaround Time
1-5 days
Related Documents
For more information, please review the documents below
Specimen
Plasma
Volume
2 mL
Minimum Volume
1.5 mL
Container
ARUP Standard Transport Tube
Collection Instructions
Place tube on wet ice immediately after collection. Separate plasma from cells ASAP or within 1 hour of collection. Transfer plasma to an ARUP Standard Transport Tube and freeze immediately.
Patient Preparation
Patient should avoid ingestion of vitamin C for 24 hours prior to sample collection.
Storage Instructions
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Causes for Rejection
Samples that are not plasma. Samples not received frozen.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unacceptable |
| Refrigerated | Unacceptable |
| Frozen | 1 week |