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HelpTest Code LAB151 C4 Complement
Clinical System Name
C4 Complement
Synonyms
C4
Sample Requirements
Specimen: Whole blood
Container(s): Gold SST, Gold Microtainer, Red, Lt. Green/Lithium Heparin, Dark Green/Sodium Heparin, Lavender/EDTA
Preferred Vol: 2.0 mL
Minimum Vol: 1.0 mL
Note:Avoid hemolysis. Can share volume with any other testing performed on the ProSpec
Processing Instructions
Reject due to:
Spin: Y
Aliquot: Y
Temp: 2-8 C
Storage location: CPA refrigerator, FrigA rack.
Off-site collection: Spin and aliquot 0.5mL serum/plasma in plastic tube. Send refrigerated.
Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| gel separator with serum/plasma | Refrigerated | 48 h |
| separated serum/plasma | Room temp | 2 h |
| Refrigerated | 8 d | |
| Frozen | 3 m |
Availability
| STAT | Performed | TAT |
|---|---|---|
| N | M, W, F, day shift | 1-3 d |
Performing Laboratory
Seattle Children's Laboratory
Department
Department: Chemistry
Location: Chem East
Phone Number: (206) 987-2617
CPT Codes
86160
Methodology
Method: Nephelometry by Siemens ProSpec
Analytical Volume: 0.4 mL serum/plasma (absolute minimum is 0.250 mL serum/plasma)
Limitations: Test is affected by repeated freeze-thaw cycles.
Reference Range
| mg/dL | |
|---|---|
| <4 Months | 10 - 37 |
| > 4 Months | 16 - 52 |