Magnesium, RBC
Use
Evaluate magnesium deficiency
Special Instructions
Ensure that the sample is collected using one of the specified containers such as a green-top, lavender-top, royal blue-top (EDTA), or tan-top lead-free tube. The sample must be centrifuged as soon as possible to separate plasma from cells, and only the RBCs should be submitted for testing. Additional time may be required for reflex or confirmatory tests.
Limitations
This test has not been cleared or approved by the Food and Drug Administration, indicating it was developed by LabCorp with its own performance characteristics. The test is suitable for assessing magnesium deficiency but does not provide information on other potential causes of hypomagnesemia. Potential limitations include interference from certain medications or medical conditions, affecting the accuracy of the test results.
Methodology
Mass Spectrometry
Biomarkers
LOINC Codes
- 26746-8
- 26746-8
Result Turnaround Time
2-4 days
Related Documents
For more information, please review the documents below
Specimen
Other
Volume
1 mL
Minimum Volume
0.2 mL
Container
Green-top (heparin) tube, lavender-top (EDTA) tube, royal blue-top (EDTA) tube, or tan-top lead-free tube
Collection Instructions
Centrifuge tube as soon as possible and separate plasma from cells. Discard the plasma. Using the original collection tube, submit only the RBCs to the laboratory.
Storage Instructions
Room temperature
Causes for Rejection
Serum or plasma specimen
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 14 days |