ARUP's Laboratory Test Directory

Complement Components 3 and 4 : 0050149

Mnemonic: C3C4

Methodology: Quantitative Immunoturbidimetry
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect: Serum separator tube.

Specimen Preparation: Allow specimen to clot at room temperature. Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube and freeze. (Min: 0.6 mL)

Storage/Transport Temperature: Frozen.

Unacceptable Conditions: Specimens left to clot at refrigerated temperature. Specimens exposed to repeated freeze/thaw cycles.

Stability (collection to initiation of testing): Ambient: 8 hours; Refrigerated: 24 hours; Frozen: 2 weeks (avoid repeated freeze/thaw cycles)
Reference Interval:
 
Test Number Components Reference Interval
0050150Complement Component 3  
 
0-30 days: 59-121 mg/dL     
1 month: 55-129 mg/dL                 
2 months: 61-155 mg/dL               
3 months: 67-136 mg/dL               
4 months: 65-182 mg/dL               
5 months: 67-174 mg/dL               
6 months: 77-179 mg/dL                		7-8 months: 78-173 mg/dL
9-11 months: 76-187 mg/dL
1 year: 87-181 mg/dL
2 years: 84-177 mg/dL
3-4 years: 80-178 mg/dL
5-11 years: 80-160 mg/dL
12-17 years: 82-163 mg/dL
18 years and older: 88-201 mg/dL
0050155Complement Component 4  
 
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 x2
Cross References: C3 & C4 (Complement Components 3 & 4)