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HelpTest Code C4 C4 complement
Laboratory Code
LAB151
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0 mL
Minimum Volume: 0.5 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs.
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 2 days |
| Refrigerate | 2 days |
| Frozen | 3 months |
Methodology
Immunoturbidimetry
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Gross Lipaemia | Alert/Reject |
| Others | Not applicable |
Reference Interval
| Age | Male (mg/dL) | Female (mg/dL) |
|---|---|---|
| 1 – 13 yrs | 14 – 44 | 13 – 46 |
| 14 – 79 yrs | 15 – 53 | 15 – 57 |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Acute phase protein.
Useful in screening for classic and activation of alternative complement pathway.
Aids in the determination of inherited or acquired deficiencies as well as the diagnosis of inflammatory and necrotic disorders.
Service Code
31922
LOINC Code Information
4498-2
Alias
C4 COMP
Complement C4
Update
Last updated 10/03/2025