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: 28 days
Refrigerated: 7 days
Frozen: 28 days
Methodology
Liquid Chromatography - Tandem Mass Spectrometry (LC-MS/MS)
Enzymatic Colorimetric Assay
Enzymatic Colorimetric Assay
Reference Range
See report
Performing Laboratory
Mayo Clinic Laboratories
New York DOH Approval Status
Yes