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HelpTest Code LAB1234678 Methotrexate Post Glucarpidase, Serum
Useful For
Monitoring methotrexate concentrations post-glucarpidase therapy
Documenting failure to respond that may be due to noncompliance
Guiding dosage adjustments in patients with kidney failure
Reporting Name
Methotrexate Post Glucarpidase, SSpecimen Type
SerumShipping Instructions
Ship specimen in amber vial to protect from light.
Specimen Required
Supplies: Amber Frosted Tube, 5 mL (T915)
Collection Container/Tube:
Preferred: Red top
Acceptable: Serum gel
Submission Container/Tube: Amber vial
Specimen Volume: 1 mL
Collection Instructions: Centrifuge and aliquot serum into an amber vial.
Specimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 7 days | LIGHT PROTECTED |
| Frozen | 14 days | LIGHT PROTECTED | |
| Ambient | 7 days | LIGHT PROTECTED |
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | OK |
| Exposed to light >24 hours | Reject |
Reference Values
Nontoxic drug concentration after 72 hours: <0.1 mcmol/L
Day(s) Performed
Monday through Sunday
Report Available
Same day/1 daySpecimen Retention Time
14 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
80204
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| MTXSG | Methotrexate Post Glucarpidase, S | 51602-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 62580 | Methotrexate Post Glucarpidase, S | 51602-1 |
Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.