Leukotriene E4, urine

Alphabetical Test listing

Leukotriene E4, urine-994

  
Leukotriene E4, urine
  
994
  
LAB994
  
MSO
  

An aid to evaluate patients suspected of having systemic mastocytosis Identification of aspirin sensitivity in patient respiratory diagnoses

  

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.

  
Urine, 24 hr
  
24 hr urine collection
  
  
  1. Record the total volume
  2. Mix well
  3. Pour a 4mL (minimum 1.0 mL) aliquot into a Screw cap transfer vial/tube (Mayo T465)
  
  
Urine, random
  
  

Transfer 4 mL of random urine to a Screw cap transfer vial/tube (Mayo T465)

  

Refrigerated (preferred) - 7 days

Frozen - 30 days

Ambient - 24 hours

  
Mayo Clinic Laboratories (LTE4): R - NX
  
Tu, Fr
  
2 - 6 days
  

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

  

≤ 104 pg/mg creatinine

  
82542
  
06/03/2019
  
06/03/2019
  
02/16/2021