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Enzyme immunoassay (EIA) to measure functional activity. This method provides C1 esterase function activity as a percentage of mean normal activity.
2 - 5 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Serum or plasma, frozen
0.1 mL (Note: This volume does not allow for repeat testing.)
Red-top tube or lavender-top (EDTA) tube
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.
Freeze (A serum sample should not be stored at room temperature [15°C to 30°C] for longer than six hours. EDTA plasma may be held at room temperature for 24 hours.)
Plasma other than EDTA; thawed or nonfrozen sample
Esterase inhibitor is decreased in hereditary angioneurotic edema. Functional level will be decreased when concentration of inhibitor is decreased or inhibitor is nonfunctional.
Enzyme immunoassay (EIA)
% of mean normal activity:
• Abnormal: <41%
• Equivocal: 41% to 67%
• Normal: >67%
|Order Code||Order Code Name||Order Loinc||Result Code||Result Code Name||UofM||Result LOINC|
|120220||C1 Esterase Inhibitor, Func||48494-9||120221||C1 Est.Inhib.Funct.||%mean normal||48494-9|
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