COMPLEMENT C1 ESTERASE INHIBITOR FUNCTIONAL

General Information

HLAB/HOL Code: C1EST
UPHSM LIS Test #: 026333
Schedule:
Testing Time: 3-5 Days
Testing Lab: Labcorp

Specimen Info
Only 1 specimen type required, unless otherwise specified

Volume: 0.5 mL
Temperature: Frozen
Tube Type: Serum or Plasma
Collection Info:
Minimum Volume: 0.1 mL (Note: This volume does not allow for repeat testing.)
Container: Red-top tube or lavender-top (EDTA) tube
Collection: Separate serum or plasma from cells and transfer to a plastic transport tube before freezing. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.


Specimen Acceptability

Cause for Rejection:
Plasma other than EDTA; thawed or nonfrozen sample

Methods

Enzyme Immunoassay (EIA)

Clinical Utilities

Esterase inhibitor is decreased in hereditary angioneurotic edema. Functional level will be decreased when concentration of inhibitor is decreased or inhibitor is nonfunctional.

CPT Codes

86161

* The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding
is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

Reference Range

% of mean normal activity:
• Abnormal: <41%
• Equivocal: 41% to 67%
• Normal: >67%