A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Oxalate, Serum/Plasma
Test CodeOXALP
Alias/See Also
5390
CPT Codes
83945
Preferred Specimen
2 mL serum collected in a red-top tube (no gel), or plasma collected in a sodium heparin (green-top) tube
Patient Preparation
It is recommended that patients refrain from taking excessive amounts of vitamin C or vitamin C rich food for at least 48 hours prior to collection.
Minimum Volume
0.7 mL
Other Acceptable Specimens
Plasma collected in an: EDTA (lavender-top), or EDTA (pink-top) tube
Instructions
Promptly centrifuge with refrigeration and separate serum or plasma into chilled plastic screw-cap vial using approved guidelines.
Note: Ascorbic acid at very high concentration (exceeding 51 mcmol/mL plasma) can interfere.
Note: Ascorbic acid at very high concentration (exceeding 51 mcmol/mL plasma) can interfere.
Transport Container
Transport tube
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: Unacceptable
Refrigerated: 14 days
Frozen: 30 days
Refrigerated: 14 days
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature • Sodium fluoride/potassium oxalate (gray-top) tube • Serum separator tube (SST) • Polymer gel separation tube
Methodology
Enzymatic Assay (EZA)
Setup Schedule
Set up: As needed; Report available: 6 days after set up
Reference Range
See Laboratory Report
Clinical Significance
Overexposure/Poisoning Determination; Biomarker
Performing Laboratory
NMS Labs
200 Welsh Rd
Horsham, PA 19044
Last Updated: June 22, 2023