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Test Code C1ESTF C1 Esterase Inhibitor, Functional Assay, Serum

Important Note

SEND SPECIMEN TO LAB IMMEDIATELY ON WET ICE.

CALL LAB TO NOTIFY WHEN SPECIMEN SENT.

 

Freeze specimen within 30 minutes.

Additional Codes

Mayo Code
FC1EQ
Epic Code
LAB769
Sunquest Code
C1ESTF

 

Reporting Name

C1 Esterase Inhib, Functional

Useful For

Diagnosing hereditary angioedema and for monitoring response to therapy

Method Name

Enzyme Immunoassay (EIA)

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum Red


Specimen 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

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus Reject
Other Heat-inactivated samples

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