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Leukotriene E4, 24-Hour Urine

Order Name Leukot E4 Ur
Test Number: 6907343
Revision Date 08/01/2022
Test Name Methodology LOINC Code
Leukotriene E4, 24-Hour Urine
Liquid Chromatography/Mass Spectroscopy 33343-5 
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 5 mL (2 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.
Remarks: Collection duration and urine volume must be provided for testing. Total collection volume must be greater than 500 mL.
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.
Due to send out performing lab location, separate specimens must be submitted when multiple tests are ordered.
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: 3004792
Click Here to view information on the ARUP website.
CPT Code(s)  82542
Lab Section Reference Lab