Complement C1 Esterase Inhibitor, Functional
C1 Esterase Inhibitor
Hereditary Angioneurotic Edema Test
Esterase inhibitor is decreased in hereditary angioneurotic edema. Functional level will be decreased when concentration of inhibitor is decreased or inhibitor is nonfunctional.
Serum or plasma, frozen
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.
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