Test Code C4X Complement C4

Methodology

Immunoturbidimetric assay.

Human C4 forms a precipitate with a specific antiserum which is determined turbidimetrically.

St. Clair Hospital Laboratory

1 plasma gel tube (1 mL of lithium heparin plasma). Centrifuge blood as soon as possible, or send unspun blood to laboratory within 4 hours of draw.

10-40 mg/dL

Monday through Sunday