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Test Code C1ESTI C1 Esterase Inhibitor, Functional, Serum

Additional Codes

Mayo C1INF
Epic ID LAB2329

 

Specimen Type

Serum Red


Specimen Required


Patient Preparation:

Fasting: 8 hours, 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 Serum

Collection Instructions:

1. Immediately after specimen collection, place the tube on wet ice and allow specimen to clot.

2. Centrifuge at 4° C and aliquot serum into a plastic vial.

3. Within 30 minutes of centrifugation, freeze specimen. Specimen 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.


Specimen Minimum Volume

Serum: 0.4 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Red Frozen 28 days
UPH Waterloo Region Lab Test Catalog Note:

Transport frozen.

Reject Due To

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

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Method Name

Enzyme Immunoassay (EIA)

Useful For

Diagnosing hereditary angioedema

 

Monitoring response to C1 esterase inhibitor replacement therapy

Day(s) Performed

Varies

Report Available

3 to 5 days

Reference Values

>67% normal (normal)

41-67% normal (equivocal)

<41% normal (abnormal)

CPT Code Information

83520