Ordering Recommendation
Follow-up test for complement activity screening when CH50 and AH50 are low or absent and high suspicion remains for complement deficiency.
Mnemonic
COMP 8
Methodology
Quantitative Radial Immunodiffusion
Performed
Varies
Reported
5-12 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect
Plain Red. Also acceptable: Lavender (K2EDTA) or White (PPT)
Specimen Preparation
Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.1 mL)
Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.
Storage/Transport Temperature
Room temperature. Also acceptable: Refrigerated or frozen.
Unacceptable Conditions
Remarks
Stability
Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 3 weeks
Reference Interval
By report
Interpretive Data
Compliance Category
Performed by non-ARUP Laboratory
Note
Hotline History
N/A
CPT Codes
86160
Components
Component Test Code* | Component Chart Name | LOINC |
---|---|---|
0099074 | C8 Complement Component | 4509-6 |
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
Complement Component 8
Quest Diagnostics San Juan Capistrano Inc.