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HelpTest Code C1ESTI C1 Esterase Inhibitor, Functional Assay, Serum
Additional Codes
MAYO: FC1EQ
EPIC: LAB2329
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.
Supplies: Aliquot Tube, 5 mL (T465)
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 aliquot serum into a 5-mL plastic vial.
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) Performed
Varies
Test Classification
This test has been cleared, approved, or is exempt by the US 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 |
Report Available
1 to 5 daysReject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
| Gross icterus | Reject |
| Heat-inactivated samples | Reject |
Method Name
Enzyme Immunoassay (EIA)