Test Details

Mnemonic

RLTE4

Ordering Code

3800268

CPT-4 Code(s)

82542, 82570

Specimen Information

Patient Preparation

Patients taking 5-lipoxygenase inhibitor zileuton/Zyflo may have decreased concentrations of leukotriene E4 (LTE4) if dosage has not been discontinued for 48 hours.

Collect

Random Urine

Specimen Preparation

Send 5.0 mL random urine collection in a screw capped plastic vial. No preservative.

Minimum Volume

2.0 mL

Transport Temperature

Refrigerated

Stability

Room temperature: 24 hours
Refrigerated: 7 days
Frozen: 30 days

Methodology

Liquid Chromatography - Tandem Mass Spectrometry (LC-MS/MS)
Enzymatic Colorimetric Assay
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Reference Range

See report
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Performing Laboratory

Mayo Clinic Laboratories
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