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HelpTest Code FC1EQ C1 Esterase Inhibitor, Functional Assay, Serum
Reporting Name
C1 Esterase Inhib, FunctionalUseful For
Diagnosing hereditary angioedema and for monitoring response to therapy
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Serum RedSpecimen Required
Patient Preparation: Patient should be fasting.
Collection Container/Tube: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Immediately after specimen collection, place the tube on wet ice.
2. Centrifuge at 4° C and separate serum from clot.
3. Freeze specimen within 30 minutes.
Specimen Minimum Volume
0.1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum Red | Frozen | 28 days |
Reference Values
>67% normal (normal)
41-67% normal (equivocal)
<41% normal (abnormal)
Day(s) and Time(s) Performed
Varies
Test Classification
This test has been cleared, approved or is exempt by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
83520
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FC1EQ | C1 Esterase Inhib, Functional | 48494-9 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 81493 | C1 Esterase Inhib, Functional, QN | 48494-9 |
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | Reject |
| Other | Heat-inactivated samples |
Method Name
Enzyme Immunoassay (EIA)