Test Details

Mnemonic

METHL

Ordering Code

1755020

CPT-4 Code(s)

80320 (84600)

Specimen Information

Collect

Gray sodium flouride. Do not remove cap from collection tube.

Specimen Preparation

Send 5.0 mL whole blood. Do not open container. Specimens in aliquot containers must be sealed immediately after transferring to minimize exposure to air.

Alternate Specimen

Serum from Red top, green sodium or lithium heparin.

Minimum Volume

1.0 mL

Transport Temperature

Refrigerated

Stability

Room temperature: 48 hours
Refrigerated: 7 days
Frozen: Whole Blood: Unacceptable; Plasma/serum/urine: 30 days

Methodology

Gas Chromatography/Flame Ionization Detection
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Reference Range

Decision level: 10 mg/dL
Toxic: >20 mg/dL
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Performing Laboratory

Warde Medical Laboratory
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