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HelpTest Code CUIX CU Index
Reporting Name
CU IndexPerforming Laboratory
Eurofins ViracorSpecimen Required
Patient Preparation: Patients taking calcineurin inhibitors should stop medication 72 hours prior to draw. Patients taking prednisone should be off their medication for 2 weeks prior to draw.
Specimen Type: Serum
Collection Container/Tube: Red or SST
Submission Container/Tube: Plastic vial
Specimen Volume: 2 mL
Collection Instructions:
1. Draw 5 mL blood in a serum separator tube (SST) (plain, red-top tube is acceptable).
2. Separate from cells within 2 hours of draw. Send 2 mL of serum ambient in a plastic vial.
Specimen Minimum Volume
0.5 mL
Specimen Type
SerumSpecimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Ambient (preferred) | 14 days |
| Frozen | 14 days | |
| Refrigerated | 14 days |
Day(s) Performed
Monday and Thursday
Reference Values
< 10.0
The CU Index test is the second generation Functional Anti-FceR test. Patient with a CU Index greater than or equal to 10 have basophil reactive factors in their serum which supports an autoimmune basis for disease.
Method Name
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.CPT Code Information
86343
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FCUIX | CU Index | 63369-3 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| FCUIX | CU Index | 63369-3 |