Chronic Urticaria (CU) Index
Commercial Mail-out Laboratory
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.
|Red top tube 5 mL (Clot Activator)
2-3 business days from receipt of specimen at reference laboratory
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