ARUP's Laboratory Test Directory

Complement Component 4 : 0050155

Mnemonic: C4

Methodology: Immunoturbidimetric
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect:  One 4 mL serum separator tube.

Transport:  0.5 mL serum, frozen. (Min: 0.3 mL)

Pediatric Collection/Transport:  0.2 mL serum, frozen.

Remarks:  Allow sample to clot at 20-25°C. Separate serum from cells ASAP and freeze.

Unacceptable Conditions:  Samples left to clot at 2-8°C.

Stability:  Ambient: 8 hours; Refrigerated: 24 hours; Frozen: 2 weeks (avoid repeated freeze/thaw cycles)
Reference Interval:
 
0-30 days: 8-30 mg/dL
1 month: 9-33 mg/dL
2 months: 9-37 mg/dL
3 months: 10-35 mg/dL
4 months: 10-49 mg/dL
5 months: 9-48 mg/dL
6 months: 12-55 mg/dL 		7-8 months: 13-48 mg/dL
9-11 months: 16-51 mg/dL
1 year: 16-52 mg/dL
2-4 years: 12-47 mg/dL
5-11 years: 13-44 mg/dL
12-17 years: 14-41 mg/dL
18 years and older: 10-40 mg/dL

CPT Code(s): 86160
 
 

 

 

 
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