Test ID FC1EQ C1 Esterase Inhibitor, Functional Assay, Serum
Useful For
Diagnosing hereditary angioedema and for monitoring response to therapy
Method Name
Enzyme Immunoassay (EIA)
Reporting Name
C1 Esterase Inhib, FunctionalSpecimen 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
Performing Laboratory

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 |