2 - 6 days
Hereditary Angioedema (HAE)
HAE (Hereditary Angioedema)
Complement C1 Esterase Inhibitor, Functional
Functional C'1 Esterase
C1 Esterase Inhib, Functional
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Enzyme Immunoassay (EIA)
The diagnosis of C1 esterase inhibitor deficiency (hereditary angioedema) or monitoring response to therapy. If C1 Esterase Inhibitor Quantitation is low, it is not necessary to do the functional assay, as it will also be low.
Normal: >67%, Equivocal: 41 - 67%, Abnormal:
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
A fasting specimen is preferred but not required. Collect specimen in a red top tube; do not use SST tube. Immediately place on wet ice. Centrifuge, aliquot serum into a plastic vial and freeze immediately. Hemolytic or thawed specimens are unacceptable.