C4a LEVEL

Specimen Required
Draw blood in a lavender EDTA. Centrifuge within 30 minutes of collection and remove cell-free plasma. Send 1.0 mL plasma (0.5 mL minimum) frozen in a screw-capped plastic vial.

Rejection Criteria
Specimens received not frozen.

Methodology
Radioimmunoassay

Stability
Room temperature: Unacceptable; Refrigerated; Unacceptable; Frozen (-70°C): 1 year

Reference Range
0-2830 ng/mL

Performed
1st and 3rd Thursday of the month

Turnaround Time21-28 days
Test CodeC4AL
CPT-4 Code (s)
86160
LOINC Codes
4501-3

Warde
Medical
Laboratory