Chronic Urticaria (CU) Index
Label Mnemonic: CUFUNC
Epic code: LAB7342
Downtime form: A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery
Commercial Mail-out Laboratory
5231 RCP
Specimen Instructions:
NOTE - Patients taking calcineurin inhibitors should stop their medication for 72 hours prior to draw. Patient taking prednisone should be off their medication for two weeks prior to draw.
Collection Medium:
Red top tube 5 mL (Clot Activator)
1 mL serum
Turn Around Time:
2-3 business days from receipt of specimen at reference laboratory
Reference Range:
The result is reported as an index value. The reference range for a healthy non-CU population is less than 10. Values greater than or equal to 10 indicate that donor basophils were stimulated by patient serum to release histamine. The larger the value the more histamine released.
Ex Vivo Challenge, Cell Culture and Histamine Analysis
CPT Code: