Complement C5




Test Mnemonic

COMPC5

CPT Codes

  • 86160 - QTY (1)

LOINC ®

4505-4

Aliases

  • C5 Total

Performing Laboratory

ARUP


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1 mLSerumSST (Gold) Frozen, CriticalCRITICAL FROZEN. Allow specimen to clot for one hour at room temperature. Separate serum from cells ASAP or within 2 hours of collection and transfer into standard aliquot tube. Freeze immediately. Separate specimens must be submitted when multiple tests are ordered.

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
0.3 mL     

Stability

Environmental Condition Description
FrozenAfter separation from cells: 2 weeks (Avoid repeated freeze/thaw cycles)
AmbientAfter separation from cells: 2 hours
RefrigeratedAfter separation from cells: Unacceptable

Days Performed

Tue, Fri

Turnaround Time

4 - 9 days

Methodology

Name Description
Radial Immunodiffusion (RID) 

Reference Range

Complement C5
Sex Age From Age To Type Range Range Unit
       Normal7 - 20mg/dL

Special Info

CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Non-frozen specimens will be rejected. Specimens left to clot at refrigerated temperature and specimens exposed to repeated freeze/thaw cycles are unacceptable. This test is New York DOH approved.

Clinical Info

Used as a follow-up test for complement activity screening when CH50 and AH50 are low or absent and high suspicion remains for complement deficiency.