Complement C1 Esterase Inhibitor, Functional

Test ID: 


CPT code:



C1 Esterase Inhibitor

C1 Inactivator

C1 Inhibitor

Esterase Inhibitor

Hereditary Angioneurotic Edema Test

Clinical Use:

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

Specimen Type:

Serum or plasma, frozen

Requested Volume: 

0.5 mL

Minimum Volume: 

0.1 mL

Container Type: 

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.

Storage Instructions:


Stability Requirements:

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

Rejection Criteria

Plasma other than EDTA; thawed or nonfrozen sample

Return Back to Test Directory

MCI Diagnostic

Providing top patient care with fast results. 

7018 South Utica Avenue

Tulsa, Oklahoma 74136

Hours of Operation

Mon – Sat: 7AM-11PM

Sun: 7AM-3PM

Government Contract

Mon – Sat: 7AM-11PM

Sun: 7AM-3PM


Mon – Sat: 7AM-11PM

Sun: 7AM-3PM

Thank you for uploading your files. Your upload has been submitted successfully.