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: 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
New York DOH Approval Status
Yes