Test directory: Complement Component C4a

Ordering Code 8646
Test Name Complement Component C4a
Alias C4a des Arg, C4a complement, Activation Complement C4a
Preferred Specimen Plasma
Preferred Container Quest Protease Inhibitor transport tube
Optimum Volume 2 mL
Collection Instructions Quest Protease Inhibitor transport tube is required, other aliquot tubes will be rejected

Prior to collection: Contact DLS Client Services at 589-5101 for Protease Inhibitor transport tube for this test (Quest product ID T167)
Handling Instructions Collect whole blood into EDTA (lavender-top) tube.
Centrifuge and transfer the cell-free plasma to protease inhibitor transport tube and freeze.
Transport Requirements Oahu: Frozen
Airline: Frozen. Ship on dry ice.
Specimen Stability Ambient: Not Stable
Refrigerated: Unacceptable
Frozen -20: 21 Days
Frozen -70: 60 Days
Rejection Criteria Grossly hemolyzed, Grossly lipemic, Grossly icteric,
Specimen not shipped in Protease Inhibitor transport tube
Avail. Stat NO
Analytic Time 14 Days
Methodology Enzyme Linked Immunosorbent Assay (ELISA)
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of August 21, 2026.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Complement Comp C4a ALL See report.