Test Code C1QBIND Immune Complex Assay by C1q Binding
Performing Laboratory
LabCorp Burlington NC
Methodology
Enzyme immunoassay (EIA)
Specimen Requirements
Container/Tube: Gold-top tube(s).
Specimen: 1 mL of serum (0.1 mL min)
Transport Temperature: Frozen
Stability: 1 Day Room Temperature
7 Days Refrigerated
14 Days Frozen
Note: Freeze serum within one hour of time drawn
Reference Values
Negative: <4.4 μg Eq/mL
Equivocal: 4.4−10.7 μg Eq/mL
Positive: >10.7 μg Eq/mL
TAT 5 - 9 Days
Test Classification and CPT Coding
86332
LOINC Code: 27831-7
Computer Interface Code
PDM # 5902320
Used For
Monitor immune complex disease (ie, lupus, glomerulonephritis, serum hepatitis, arthritis, vasculitis); monitor progress of some malignancies
Circulating immune complexes can be demonstrated in rheumatic, infectious, and neoplastic diseases, as well as most immunologically mediated illnesses (inflammatory bowel disease, thrombotic thrombocytopenic purpura). The 1981 WHO/IUIS survey of laboratory tests in clinical immunology concluded that the detection of circulating immune complexes is not essential to any specific diagnosis.