Testing Laboratory
Canterbury Health Laboratories Christchurch HospitalDepartment
Immunology
Delphic Registration Code (Alpha Code)
CNF
Test Code (Numeric Code)
7242
Laboratory Handling
Phlebotomy
Serum
Transport
Ambient (8-24°C)
Registration
After registration add the sample to the Immunochemistry rack. The Immunochemistry staff will ask the pathologist to complete vetting and complete the send away process.
Separating
Make a seaprate aliquot to run C3 and C4 at LabPlus before sending the sample to Canterbury Health
Sample Stability
2-8°C until testing
Associated Tests
Synonyms
CNF, Nephritic factor
Turnaround Time
4 weeks
This test may be vetted by the laboratory. Please include relevant clinical information on the request form to ensure appropriate tests are approved. See the 'Clinical Information' section below for more information on the indications for testing.
Specimen Type
- Serum
Specimen Requirements
Tube/Container Type:
Preferred
- Plain (Red Top)
Acceptable
- SST II (Gold Cap)
Preferred Sample Volume (ml)
4
Minimum Sample Volume (ml)
1
Paediatric Specimen Requirements
Tube/Container Type:
Preferred
- Plain(Microtainer)
Acceptable
- SST(Microtainer)
Preferred Sample Volume (ml)
1
Minimum Sample Volume (ml)
0.5
Pre-testing Requirements
Run C3 and C4 at LabPlus before sending the sample to Canterbury Health.
Test vetted by Immunologist at LabPLUS.
The clinical information for the test must be clearly written on the request form. If clinical information is not provided, or does not provide enough justification for the test, the test may be declined.
Declined tests:
If a test is declined, the specimen will be held for a reasonable period (usually 2 weeks but dependant on the viability of the sample). Medical practitioners seeking approval for a declined test should email the LabPLUS Immunology Team , giving the patient's name and NHI number and the clinical justification for the test. If unable to email, call the on-call Immunologist via Lablink (09-3078995).
Last updated: 23/04/2026