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Test ID BLOD1007 Methotrexate Prior Leuco Dose

Container Type

Serum tube w/out gel

Specimen Type/Requirements

Serum

Specimen Volume

1.0 mL

Stability

Room Temperature: 1 day
Refrigerated: 14 days
Frozen: Indefinitely

Interfering Substances

Hemolysis: NA
Lipemia: NA

Transport Temperature

Refrigerated

Instructions

Do Not Use Serum Separator Gels.

Performed Test Frequency

Monday through Sunday

Methodology

Enzyme Immunoassay

Performing Lab

Sanford Sioux Falls

Additional Information

Specimens from patients who have received glucarpidase (carboxypeptidase G2) as a high dose methotrexate rescue therapy should not be tested with this method. These patients have an increased level of metabolite

that cross reacts with the methotrexate antibody. These metabolites stay in circulation for 5-7 days.

CPT

80299