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Leukotriene E4 Urine

Order Name Leukot E4 Ur
Test Number: 6907343
Revision Date 04/02/2021
Test Name Methodology LOINC Code
Leukotriene E4 Urine
Liquid Chromatography/Mass Spectroscopy 33343-5 
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 4 mL (1 mL) Urine, 24-hour 24 hour Urine Container Refrigerated
Instructions Patient Prep: Patients taking 5-lipoxygenase inhibitor Zileuton/Zyflo may have decreased concentrations of leukotriene E4 (LTE4) if dosage has not been discontinued for 48 hours. If possible, discontinue for 48 hours before testing.
Specimen Prep:Collect: 24-hour urine. Also acceptable: random urine Specimen Prep: Refrigerated specimen during collection. Transfer 4mL (1mL) urine in standard pour off tube.
Stability: Ambient - 24 hours; Refrigerated - 7 days; Frozen - 30 days
Testing Schedule Varies 
Expected TAT 3-9 days after set-up  
Notes Reference Lab: ARUP
Test Code: 3002351
Click Here to view information on the ARUP website.
CPT Code(s)  82542
Lab Section Reference Lab