Process within 2 hours of collection. Sample should be refrigerated if unable to assay within 4 hours. Allow Gold tube to sit for 30 minutes to form clot. Spin for 10 minutes at 1100-1300 g in a swing bucket unit or 15 minutes in a fixed angle to separate cells from serum. Refrigerate spun tube. Remember to properly label tube with patient name, DOB, test and collect date.
Storage/Transport Temperature
Refrigerated serum
Stability (from collection to initiation)
Spun sample: Room Temperature: 4 hours; Refrigerated: 8 days; Frozen: up to 3 months
Ordering Recommendations
C4 Complement (C4) is a protein with an important role in the immune system. Complement 4 is ordered with another complement protein, C3, when there is a suspicion of an autoimmune disease or when patients are acutely ill from bacterial sepsis.
Performed
Monday - Sunday; Days, Evenings, Nights
Methodology
Turbidimetric
Reported
2-4 hours
Performing Lab
Chemistry
Synonyms
6952
C4
Complement Component 4
Complement C4, Ser Quant
Reference Chart
Age
Range (mg/dL)
0 days - 1 year
5-33
1 - 19 years
12-41
19 - 150 years
19-52
CPT Codes
86160
LOINC Codes
NAME
LOINC
Order
C4 Complement Ser QN
4498-2
Result
C4 Complement Ser QN
4498-2
Test Code (Outreach Synonym)
6952
Catalog Code
685510
Collection
Collect
Blood, Gold
Preferred Draw Volume
5 mL
Minimum Draw Volume
0.5 mL
Pediatric Collection
1 Full microtainer
Unacceptable Conditions
No plasma. Avoid thawing and refreezing.
Collection Comments
Process within 2 hours of collection. Sample should be refrigerated if unable to assay within 4 hours. Allow Gold tube to sit for 30 minutes to form clot. Spin for 10 minutes at 1100-1300 g in a swing bucket unit or 15 minutes in a fixed angle to separate cells from serum. Refrigerate spun tube. Remember to properly label tube with patient name, DOB, test and collect date.
Storage/Transport Temperature
Refrigerated serum
Stability (from collection to initiation)
Spun sample: Room Temperature: 4 hours; Refrigerated: 8 days; Frozen: up to 3 months
Ordering
Ordering Recommendations
C4 Complement (C4) is a protein with an important role in the immune system. Complement 4 is ordered with another complement protein, C3, when there is a suspicion of an autoimmune disease or when patients are acutely ill from bacterial sepsis.
