Plasma from a lavender top (EDTA) tube is the only acceptable sample type. Mix sample thoroughly. Keep tubes cold on wet ice or with a cold pack after collection.
Within 30 minutes of venipuncture, centrifuge at 4°C. Transfer the cell-free plasma to a clean tube and immediately freeze on dry ice or at -70°C or below.
Preferred volume: 1 mL
Ambient temperature for centrifuging is acceptable provided that the time between collection, spinning and decanting to the freezer, is minimized (approximately 30 minutes).
Minimum volume: 500 µL plasma, frozen.
Thawed specimen or specimens stored at room temperature prior to shipment.
Send frozen plasma Priority Overnight via FedEx and in a well insulated container on dry ice.
Frozen at -70°C: 1 year
18 Business days
RadioImmunoassay (C4a Level);C4ades Arg Level;C4ades Arg Level (C4a Level);C4 (C4a Level);C4 anaphylatoxin (C4a Level);C4a anaphylatoxin;Complement (C4a Level);C4AL
Human Male: 0-2830 ng/mL
Human Female: 0-2830 ng/mL