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HelpTest ID C1INF C1 Esterase Inhibitor, Functional, Serum
Specimen Required
Patient Preparation: Fasting, preferred but not required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Red top
Acceptable: Serum gel
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Immediately after specimen collection, place the tube on wet ice.
2. After sample has clotted on wet ice, centrifuge at 4° C and aliquot serum into a plastic vial.
3. Freeze specimen within 30 minutes of centrifugation. Sample must be placed on dry ice if not frozen immediately.
NOTE: If a refrigerated centrifuge is not available, it is acceptable to use a room temperature centrifuge, provided the specimen is kept on ice before centrifugation and immediately afterward, the serum aliquoted and frozen.
Useful For
Diagnosing hereditary angioedema
Monitoring response to C1 esterase inhibitor replacement therapy
Method Name
Enzyme Immunoassay (EIA)
Reporting Name
C1 Esterase Inhib, Functional, SSpecimen Type
Serum RedSpecimen Minimum Volume
0.4 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
Report Available
3 to 5 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
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 |
|---|---|---|
| C1INF | C1 Esterase Inhib, Functional, S | 48494-9 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| C1INF | C1 Esterase Inhib, Functional, S | 48494-9 |