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|90525:CU (CHRONIC URTICARIA ) INDEX|
|Methodology:||ExVivo Challenge / Cell Culture and Histamine Analysis|
|Released:||48-72 hours after setup at PeaceHealth Laboratories’ reference lab.|
|Specimen Collection Details|
|Collection:||NOTE: Patients taking clacineurin inhibitors should stop their medication 72 hours prior to draw.
One 7.5 mL serum separator tube (SST).
|Handling:||Allow to clot, centrifuge and separate serum from cells and pour into a plastic vial. Refrigerate.|
|Stability:||7 days ambient, 14 days refrigerated, or 1 year frozen.|
|Standard Volume:||2 mL serum.|
|Minimum Volume:||1 mL serum.|
|Transport:||Refrigerated, or frozen on dry ice.|
|Rejection Criteria:||Specimen other than serum.
This test may require insurance company prior authorization before ordering.
Please check the prior authorization list .
Failure to gain preauthorization may result in denial of coverage.
Patients with a CU Index ≥ 10 have basophil reactive factors in their serum which supports an autoimmune basis