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Test Code FC4AL C4 Level by RIA


Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Container/Tube: Lavender top (plasma gel tubes are not acceptable)

Submission Container/Tube: Plastic vial

Specimen Volume: 1.5 mL plasma

Collection Instructions:

1. Mix well.

2. Within 30 minutes of collection (preferably immediately after venipuncture), centrifuge at ambient temperature, aliquot 1.5mL of plasma into a plastic vial and freeze immediately on dry ice or at -60 C or below in an ultra-low freezer.

3. Ship frozen.


Method Name

Radioimmunoassay (RIA)

Reporting Name

C4a Level

Specimen Type

Plasma EDTA

Specimen Minimum Volume

Plasma: 0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Plasma EDTA Frozen 365 days

Reject Due To

Hemolysis Mild OK; Gross reject

Reference Values

0-2830 ng/mL

Performing Laboratory

National Jewish Health

CPT Code Information

86160

Day(s) Performed

Monday through Friday

Report Available

9 to 14 days