Test Details

Mnemonic

TLTE4

Ordering Code

3800271

CPT-4 Code(s)

82542

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

24 hour Urine

Specimen Preparation

Send 5.0 mL 24 hour urine collection in a screw capped plastic vial. No preservative.

Minimum Volume

2.0 mL

Transport Temperature

Frozen

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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