Complement Component Level 3A




Test Mnemonic

COMP3A

CPT Codes

  • 86160 - QTY (1)

Performing Laboratory

National Jewish Health


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1 mLPlasmaEDTA (Lavender) Frozen, CriticalCritical Frozen. Mix well. Centrifuge at room temperature within 30 minutes of collection, then transfer the plasma to a standard aliquot tube and freeze immediately on dry ice or at -70 degrees C. Separate specimens must be submitted when multiple tests are ordered.

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
0.5 mL    Note: Preferred volume is 1 mL

Stability

Environmental Condition Description
FrozenFrozen at -70 degrees C for 1 year
AmbientUnacceptable
RefrigeratedUnacceptable

Days Performed

First and Third Thu

Turnaround Time

22 - 24 days

Methodology

Name Description
Radioimmunoassay (RIA) 

Reference Range

Comp C3A Level
Sex Age From Age To Type Range Range Unit
       0 - 780 ng/mL 

Special Info

Critical Frozen. Thawed specimens or specimens stored at -20 degrees C are unacceptable. Plasma from an EDTA (lavender) tube is the only acceptable specimen type. Send frozen plasma Priority Overnight via FedEx in a well-insulated container on dry ice. Separate specimens must be submitted when multiple tests are ordered.