COMPLEMENT, ALTERNATE PATHWAY (AH50)

Test Documentation
Specimen Required
Draw blood in a SST. Allow specimen to clot for hour at room temperature, then centrifuge and separate serum from cells within 2 hours of collection. Send 1.0 mL serum (0.3 mL minimum) frozen in a screw-capped plastic vial. CRITICAL FROZEN.

Alternate Specimen
Serum: Red-top

Methodology
Semi-quantitative Radial Immunodiffusion

Stability
Room Temperature: 2 hours; Refrigerated: Unacceptable; Frozen: 14 days

Reference Range
>=59% normal

Performed
Varies

Turnaround Time10-18 days
Test CodeAH50
CPT-4 Code (s)
86162 RUO
LOINC Codes
13087-2

Warde
Medical
Laboratory