Inpatient and Outpatient Orderable

C1-Esterase Inhibitor, Functional

Synonyms

C1 ESTERASE INHIBITOR, FUNCTIONAL
COMPLEMENT
LAB769

Cerner Name

Clinical Info

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

Specimen Sources

Blood, Arterial Blood, Capillary Blood, Central Line Blood, Venous

Specimen Types

Blood

Container

Red Top Tube

Collection Instructions

Container/Tube: Red Top Tube or Lavender Top Tube
Specimen: 0.5 mL serum or plasma (0.2 mL min)
Transport Temperature: Frozen
Stability: 6 Hours Room Temperature
1 Day Refrigerated
7 Days Frozen

Specimen Volume

0.5 mL serum or plasma (0.2 mL min)

Transport Instructions

Frozen

Specimen Stability

6 Hours Room Temperature
1 Day Refrigerated
7 Days Frozen

Methodology

Enzyme immunoassay (EIA)
Enzyme immunoassay (EIA) to measure functional activity. This method provides C1 esterase function activity as a percentage of mean normal activity.

Days Performed

Performing Laboratory

LabCorp

CPT

86161

LOINC Code: 48494-9

PDM

5902150

Only Orderable at Locations:

Orderable Everywhere

Results

Component Name	Base Name	Common Name	External Name
C1 ESTERASE FUNCTIONAL	C1ESTERASE	C1 ESTERASE FUNCTIONAL	C1 Esterase Functional

Result Interpretation

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

Forms

LAB769

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