CU (CHRONIC URTICARIA) INDEX
test app
|
Specimen Type:
|
Blood |
|
Container/Tube
|
|
|
Preferred:
|
Gold/Red SST Vacutainer®.
|
|
Acceptable:
|
Plain, red-top Vacutainer®.
|
|
Collection Volume:
|
4.0 mL (minimum 1.0 mL)
|
|
Patient Preparation:
|
Patients taking calcineurin inhibitors should stop medication 72 hour prior to collection.
Patients taking prednisone should be off their medication for 2 weeks prior to collection.
|
|
Sample Rejection:
|
Mislabeled or unlabeled specimens.
|
|
Special Instructions:
|
None
|
|
Test Availability:
|
Daily
|
|
Turnaround Time:
|
3-9 days
|
|
Test set-up:
|
Monday & Thursday
|
|
Lab Testing Section:
|
Send-outs
|
|
Referred to:
|
Mayo Medical Laboratories to Viracor-IBT Lab (MMLI) / Test ID: FCUIX
|
|
Reference Range:
|
<10.0
The CU Index test is the second generation Functional Anti-FceR test. Patients with a CU Index > or = 10 have basophil reactive factors in their serum which supports an autoimmune basis for disease.
|
|
Critical Values:
|
None established
|
|
Limitations:
|
NA
|
|
Methodology:
|
Ex Vivo Challenge, Cell Culture and Histamine Analysis
|
|
Test Classification:
|
This test was developed and its performance characteristics determined by Viracor-Eurofins. It has not been cleared or approved by the U.S. Food and Drug Administration.
|
|
Lab Processing instructions:
|
Centrifuge to separate within 2 hours of collection. Aliquot serum into a 5 mL, screw-capped plastic vial for transport.
|
|
Processed Volume:
|
2.0 mL (minimum 0.5 mL) serum
|
|
Transport Temperature:
|
Ambient
|
|
Analyte Stability:
|
Ambient (unprocessed): NA
PROCESSED
Ambient: 14 days
Refrigerated: 14 days
Frozen: 14 days
|
|
Notes:
|
NA |
|
EPIC order name:
|
Chronic Urticara Index, Serum (EPIP Test# LAB3041)
|
|
Cerner order name:
|
CU Index, Serum
|
|
CPT Codes:
|
86343
|
|
LOINC Value:
|
63369-3
|
|
Synonyms:
|
Chronic Urticaria
|
|
Last Updated: 03/20
|
|
Last Reviewed: 10/24
|