Home
HelpTest ID BLOD1759 CU Index
Specimen Type
SerumSpecimen 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 Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Ambient (preferred) | 14 days |
| Frozen | 14 days | |
| Refrigerated | 14 days |
Reject Due To
| Hemolysis: | NA |
| Thawing: | Warm OK; Cold OK |
| Lipemia: | NA |
| Icterus: | NA |
| Other: | NA |
Day(s) Performed
Monday and Thursday
Report Available
2 to 9 daysMethod Name
Ex Vivo Challenge, Cell Culture and Histamine Analysis
Performing Laboratory
Eurofins ViracorCPT Code Information
86343
Secondary ID
57549Reporting Name
CU IndexReference 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.