Test Details
Methodology
Enzyme immunoassay (EIA)
Result Turnaround Time
4 - 8 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Use
Monitor immune complex disease (ie, lupus, glomerulonephritis, serum hepatitis, arthritis, vasculitis); monitor progress of some malignancies
Custom Additional Information
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.
Specimen Requirements
Specimen
Serum, frozen
Volume
1 mL
Minimum Volume
0.1 mL
Container
Red-top tube or gel-barrier tube
Collection Instructions
Separate serum from cells. Transfer specimen 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.
Reference Range
• Negative: <4.4 μg Eq/mL
• Equivocal: 4.4−10.7 μg Eq/mL
• Positive: >10.7 μg Eq/mL
Storage Instructions
Freeze prior to transport. Samples may be stored at 2°C to 8°C for seven days prior to testing.
Causes for Rejection
Hemolysis; heating specimen for thawing may give false-positive results, avoid repeated thawing and freezing.
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 096933 | Immune Complexes, C1q Binding | 27831-7 | 096933 | Immune Complexes, C1q Binding | ug Eq/mL | 27831-7 |
| Order Code | 096933 | |||||
| Order Code Name | Immune Complexes, C1q Binding | |||||
| Order Loinc | 27831-7 | |||||
| Result Code | 096933 | |||||
| Result Code Name | Immune Complexes, C1q Binding | |||||
| UofM | ug Eq/mL | |||||
| Result LOINC | 27831-7 |