C1 Esterase Functional C1ESRFUNCT

Synonyms

Allscripts (AEHR) Order Name

C1 Esterase Nonfunctional

Sunrise Clinical Manager (SCM) Order Name

C1 Esterase Functional

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 Type

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

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

Result Interpretation

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

Forms