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HelpTest Code LAB151 C4 Complement Component
Intended Use
Used to aid in the diagnosis of immunologic disorders, especially those associated with deficiencies of complement components
Methodology
Turbidimetry
Performing Laboratory
RCH
Specimen Requirements
Required: Serum
Container: Plain, red-top or gold, serum gel tube
Specimen Volume: 1.0 mL (minimum volume 0.1 mL)
Collection Instructions: Prior to centrifugation allow sample to clot 15-30 minutes at room temperature, then refrigerate 2-8°C and allow clotting to continue for 30-60 minutes. Centrifuge in a refrigerated centrifuge if available otherwise centrifuge, separate, refrigerate as soon as possible. Forward promptly.
Specimen Stability
Ambient: 4 hours
Refrigerated: 8 days
Frozen: -20 C> 8 days
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
86160