Test Details
Mnemonic
MTXS
Ordering Code
3620520
CPT-4 Code(s)
80204
Specimen Information
Collect
Red top
Specimen Preparation
Centrifuge, separate serum from cells within 2 hours of collection and send 3.0 mL serum in an
amber screw capped plastic vial.
Please note, this sample is no longer required to be protected from light.
amber screw capped plastic vial.
Please note, this sample is no longer required to be protected from light.
Alternate Specimen
Plasma: Lavender EDTA, green or sodium lithium heparin
Minimum Volume
1.0 mL
Transport Temperature
Frozen
Rejection Criteria
Serum separator tube (SST)
Stability
Room temperature: 4 hours
Refrigerated: 14 days
Frozen: 6 months
Refrigerated: 14 days
Frozen: 6 months
Methodology
Quantitative Immunoassay
Reference Range
Therapeutic Range
Low dose 0.50-1.00 μmol/L
High dose/24 hours 5.00 μmol/L or less
48 hours 0.50 μmol/L or less
72 hours 0.10 μmol/L or le
Low dose 0.50-1.00 μmol/L
High dose/24 hours 5.00 μmol/L or less
48 hours 0.50 μmol/L or less
72 hours 0.10 μmol/L or le
Performing Laboratory
ARUP Reference Laboratory
New York DOH Approval Status
Yes