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HelpEpic Code LAB3401 Chronic Urticaria Index
Additional Test Codes
Viracor Test Code: 2103
Test Name Alias
CU Index® |, | 7013
Interface Order Alias
11705
Clinical Information
Patients with a chronic form of urticaria who are positive (> 10) with the CU index® have an autoimmune basis for their disease. A positive result does not indicate which autoantibody (anti-IgE, anti-FceRI or anti-FceRII) is present.
Specimen Requirements
Specimen: Serum
Container/Tube: Gold Top (Serum Separator - SST Gel)
Volume: 5 mL
Minium Volume: 3 mL
Collection Instructions:
- Centrifuge specimen within 2 hours of draw to pellet cells below the gel.
Special Instructions
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.
Specimen Stability
Frozen: >1 week
Contact Spectrum Health Laboratory Referrals Department at 616-267-2753 for questions on specimen acceptability
Test Frequency
Sent to reference laboratory, TAT up to 5 days.
Reference Range
Assay Range 1-50
Performing Department
REFERRAL SEND OUTS
Performing Department Laboratory Location
Send Out to VIRACOR REF LAB
Methodology
Procedure Ex-Vivo Challenge and cell culture: Donor blood cells are incubated with patient serum, a negative control and a positive control. Following the ex-vivo challenge, the cells are centrifuged and the supernatant is recovered for assay of histamine released. Histamine Analysis: Using a quantitative enzyme immunoassay, the histamine released into the supernatant is measured and compared to the total histamine in the basophils.
This test has not been cleared or approved for diagnostic use by the U.S. Food and Drug Administration.
CPT
86352
CDM Code
3421590
Epic Test ID
1230100492
LOINC
| Result Code | DTA | LOINC |
| 22983 | Chronic Urticaria Index | 63369-3 |
Reviewed Date
6/9/2023