Laboratory Medicine Program

C3, C4

Clinical Decription:
Decrease in serum C3, C4 levels is seen in active systemic lupus erythematosus (SLE), in forms of membrane proliferative glumerulonephritis and in immune complex diseases (serum sickness). Both C3 and C4 are acute phase reactants, and will be elevated in patients with inflammatory diseases.
<br/><em>Manufacturers C3C4 package insert</em>

Method: Immunoturbidimetric; TBS Optilite

Component Tests Used: C3, C4

Reference Ranges Used:
C3 0.98 - 1.96 g/L C4 0.10 - 0.40 g/L

Specimen Type: serum
Volume: 1 mL (minimum: 0.5 mL)

Shipping: Frozen at -20C

Special Instructions: n/a

Testing Schedule(s): Monday through Friday.

Turnaround Time: 3 days

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