Laboratory Services
C3 Complement
Print this pageUpdated Test Information:
| Test Description |
C3 Complement
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|---|---|---|
| Synonym(s) |
C3, Complement C3
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| Test ID |
C3C
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| General Information |
Quantitation of C3 is used to detect individuals with inborn deficiency of this factor or those with immunologic disease in whom complement is consumed at an increased rate. These include lupus erythematosus, chronic active hepatitis, certain chronic infections, poststreptococcal and membranoproliferative glomerulonephritis, and others.
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| Specimen Type |
Serum
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| Specimen Requirements |
SST
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| Alternate Specimen Type |
Red, Li-heparin plasma
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| Specimen Collection / Processing Instructions |
SST - Separate serum or plasma from cells within 45 minutes of collection. If a red-top tube or green-top tube is used, transfer separated serum or plasma to a plastic transport tube.
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| Minimum Sample Volume |
1 mL
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| Pediatric Min. Volume (if applicable) |
500 uL
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| Additional Processing Details |
Separate serum or plasma from cells within 45 minutes of collection. If a red-top tube or green-top tube is used, transfer separated serum or plasma to a plastic transport tube.
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| Stability |
4 days at 20-25˚C
8 days at 4-8˚C 8 days at -20˚C |
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| Unacceptable Specimen Conditions |
Grossly lipemic samples.
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| Limitations |
Excessive lipemia (>1500 mg/dL) significantly increases the apparent C3 concentration.
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| Methodology |
Immunoturbidimetric
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| Estimated TAT |
0-2 days
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| Testing Schedule |
Monday-Saturday
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| CPT Code(s) |
86160
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| Reference Range |
90-180 mg/dL
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| Performing Lab |
Incyte Diagnostics
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| LOINC Code(s) |
4485-9
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