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HelpTest Code METHX Methotrexate, Serum
Methodology
Enzyme Immunoassay (EIA)
Specimen Requirements
Container/Tube:
Preferred: Serum gel (SST)
Acceptable: Red top
Draw blood in a serum gel tube or a plain red-top tube. Spin down and send 1.0 mL of serum in vial.
Specimen Stability Information
|
Specimen Type |
Temperature |
Time |
|
Serum, SST |
Refrigerated, spun |
14 days |
Reject Due To
|
Hemolysis |
Mild: |
ok |
Gross: |
Reject |
|
Lipemia |
Mild: |
ok |
Gross: |
ok |
|
Icterus |
Mild: |
ok |
Gross: |
ok |
Day(s) Test Set Up
Monday through Sunday
CPT Coding
80299
Performing Laboratory
Hunstville Hospital Laboratory
References Values
Non toxic drug concentration after 72 hours: <0.1 umol/L