Immune complexes, C1q binding

Alphabetical Test listing

Immune complexes, C1q binding-994

Test name:

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Alternate names:

C1q binding
C1q binding test
C1q immune complexes
Circulating immune complexes
Complement C1q immune complexes
Immune complex detection by C1q

Useful for:

Monitor immune complex disease (i.e. lupus, glomerulonephritis, serum hepatitis, arthritis, vasculitis)
Monitor progress of some malignancies.

Specimen type:

Serum

Collection container:

Gold serum separator (SST) tube

Volume:

1.0 mL

Minimum volume:

0.1 mL

Collection instructions:

Immediately following collection, thoroughly mix sample by gently inverting 5 times

Processing instructions:

Allow sample to clot for a minimum of 30 minutes
Spin within two (2) hours of sample collection
Transfer specimen to a Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp), labelled as serum
Freeze

Transport container:

Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp)

Alternate collection container:

Red serum vial/tube, 5 mL

Transport and stability:

Frozen (preferred)

Refrigerated - 7 days

Reason for rejection:

Hemolysis
Heating samples for thawing may give false positive results
Avoid repeated thawing and freezing

Performing lab:

LabCorp Burlington (096933): R-NX

Days set up:

Tu, Th

TAT:

4 - 8 days

Method:

Enzyme immunoassay (EIA)

Reference ranges:

Negative: < 4.4 μg Eq/mL
Equivocal: 4.4 - 10.7 μg Eq/mL
Positive: >10.7 μg Eq/mL

CPT codes:

86332

LOINC code:

Result 27831-7

Date created:

05/29/2019

Revised date:

12/15/2025

Review date:

12/15/2025