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Test Code LAB151 Complement Component 4 (C4)

Additional Codes

Sunquest: C4

Collection

Collect blood in a serum separator or heparin plasma separator tube.

  • Preferred:
    • Light Green (Heparin Plasma Separator Tube)
    • SST (Serum Separator)
  • Accepable
    • Red (No Additive)
    • Green No Gel (Lithium Heparin)

Centrifuge and aliquot 1.0 mL of serum or plasma into a plastic transport vial. 

Minimum Volume:

  • 0.3mL of serum or plasma (approximately 0.6mL of whole blood based upon a normal patient hematocrit).

Reject Due To:

  • Specimen does not meet collection, storage, or transport requirements.

Stability

Ambient: 48 hours.

Refrigerated: 48 hours.

Frozen: 7 days (Preferred).

 

Stability Comments: 

Remove serum from cells ASAP and freeze.

Method Name

Turbidometric

Performing Laboratory

UnityPoint Health Pathology Laboratory Ankeny, IA

Days Performed:

  • Monday-Friday: 0800-2200
  • Saturday-Sunday: 0900-1700

Analytical Time:

  • 1 Day

CPT Codes

86160