Chronic Urticaria (CU) Index Panel
| Abbrev Code: | XMISC | ||
| Order Code: | LAB4909 | Order Name: | Laboratory Miscellaneous Order |
| Methodology: | Ex Vivo Challenge, cell culture and histamine analysis | ||
| CPT Codes: | 84443 x1, 86352 x1, 86376 x1, 86800 x1 | ||
| Test Includes: | Anti-Thyroid Peroxidase IgG, Anti-Thyroglobulin IgG, TSH and CU Index | ||
| Turnaround Time: | Specimens are sent to reference laboratory Mon-Fri; results are reported within 4-12 days. | ||
| Compliance: | This test has not been cleared or approved by the US Food and Drug Administration. |
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Collection Instructions
| Specimen: | Blood |
| Optimal Volume: | 6 mL |
| Minimum\Peds Volume: | 2.2 mL |
| Container: | Red (no gel) |
| Patient Preparation: | Patients taking calcineurin inhibitors should stop medication 72 hours prior to draw. Patients taking prednisone should be off their medication 2 weeks prior to draw. |
| Causes for Rejection: | Collected in gel. Thawed specimens. |
Processing and Shipping
| Specimen Processing: | Centrifuge and aliquot 3 mL serum, 1 mL minimum. Store in refrigerator. |
| Shipping Instructions: | Ship at refrigerated temperature (preferred). |
| Stability: | 5 days at room temperature; 7 days refrigerated or frozen. |
| Test Performed at or Referral Lab | Lab Sendouts (ViraCor via Mayo) |
| Referral Lab number: | FCUIP |
Interpretive
| Reference Range: |
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| Use: | The CU index test is the second generation Functional Anti-FceR test. Patients with a CU index greater than or equal to 10 have basophil reactive factors in their serum which supports an autoimmune basis for disease. |
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