Specimen Requirements

Title

C1Q (COMPLEMENT C1Q)

Specimen Requirement

1 SST/1.0 mL serum.  Spin and separate serum from gel within 1 hour of collection.

Methodology

Stability

Room Temp 4 days; Refrigerated 10 days

Reference Range

By Report*

Turnaround

3-5 days Performed Mon, Wed

Clinical Use

Evaluate the classical complement pathway. C1q can be very low in hypocomplementemic urticarial vasculitis, severe combined immunodeficiency with agammaglobulinemia and x-linked hypogammaglobulinemia. C1q concentrations in patients with rheumatoid arthritis (RA) may be useful as a prognosticator of articular erosions.

Test Code

C1Q