|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.|