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CU (Chronic Urticaria) Index or Urticaria-Inducing Activity

Mnemonic:    [CU IND]
Name:    CU (Chronic Urticaria) Index or Urticaria-Inducing Activity
Specimen:    1 mL serum from a Red top tube. Do not use GEL barrier tubes. Separate serum from cells within 2 hours of collection and freeze the sample.

Patients taking calcineurin inhibitors should stop their medication 72 hours prior to the draw.

Patients on prednisone should be off of their medication 2 weeks prior to the draw.

Sample collected in serum separator tubes are unacceptable. Grossly hemolyzed or lipemic samples are unacceptable.
Transport Temp:    FREEZE
Spec Stability:    Stable 2 hours ambient.
Ref Lab/Code:    ARUP 2005413
  Method:    Ex Vivo Challenge/Cell Culture/Histamine Analysis
Processing Info:    Separate specimens must be submitted when multiple tests are ordered.