2 - 4 days
Test Updated:
C1 Esterase Inhibitor Quantitative
Complement C1 Esterase Inhibitor, Antigen
HAE (Hereditary Angioedema)
Hereditary Angioedema (HAE)
C1ES
C1 ESTERASE INHIBITOR-NONFUNCT
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Test Overview
Nephelometry
Diagnosis of hereditary angioedema and monitoring levels in response to therapy. Abnormally low results are consistent with a heterozygous C1 inhibitor deficiency. Normal (or elevated) levels with a nonfunctional protein are detected in 15% of hereditary angioedema patients (detection of these patients requires the functional assay).
19 - 37 mg/dL
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Specimen Requirements
Collect blood in a red top or SST tube. A fasting speciment is preferred but not required (12 hour fast). Send the specimen to Specimen Processing in a green bag. Must be spun and frozen within 30 minutes after collection.
Collect blood in a red top or SST tube. A fasting speciment is preferred but not required (12 hour fast). Centrifuge, aliquot serum into a plastic vial and freeze immediately. Thawed specimens or those stored at room temperature are unacceptable. Do not refreeze thawed specimens; may be refrigerated up to 3 days.
