Chronic Urticaria Index (Urticaria-Inducing Activity) CUAUTO
|Method(s)||Semi-Quantitative Ex Vivo Challenge/Cell Culture/Quantitative Enzyme-Linked Immunosorbent Assay|
One 5 mL plain red top tube.
Allow specimen to clot completely at room temperature before centrifuging. 1 mL serum, frozen (Min: 0.5 mL). Separate serum from cells ASAP or within 2 hours of collection.
|Remarks||Patients taking calcineurin inhibitors should stop their medication for 72 hours prior to draw. Patients taking prednisone should be off their medication for 2 weeks prior to draw.|
After separation from cells: Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 year (avoid repeated freeze/thaw cycles)
Specimens other than serum. Contaminated, grossly hemolyzed or lipemic specimens.
|Preferred Specimen Collection Device(s)|
See laboratory report.