- Test Name
- C4 Complement
- Aliases
- Complement C4; C4
- Provincial Mnemonic
- COMC4
- LOINC Test Code
- 4498-2
- Description and Primary Use
- For monitoring SLE patients (low levels are predictive of glomerulonephritis). First line test with C1-esterase inhibitor for investigating C1-esterase inhibitor deficiency in patients with angioedema and other suggestive symptoms. Secondary test for investigating possible complement deficiency in patients with low CH50 or AH50.
- Reorder interval
- 180 Days
- TAT
- 240
- Test Cost
- Not Available
- Tier
- 1 - General Availability
- Ordering Requirements (Restrictions / Conditions)
No Restrictions
- Required Consultations
- None
- Algorithms and Guidelines
None
- Special Patient Preparation
None
- Special Collection / Transport / Processing Requirements
No special requirement
- Criteria for Rejection
Please consult specimen stability guide
- Laboratory Service Area
- Clinical Chemistry
- Performing Laboratory / Site
- Category 4 Laboratory (HSC only)
- Last Updated
- 28-Aug-19