Plasma from a lavender top (EDTA) tube is the only acceptable sample type. Mix sample thoroughly.
Centrifuge at room temp within one half hour of collection; preferably immediately after venipuncture. Transfer the cell-free plasma to a clean tube and store immediately at -20°C, then transfer to dry ice for shipment within 6 hours or immediately freeze on dry ice or at -70°C or below.
Preferred volume: 1 mL
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 -20°C: 6 hours, Frozen at -70°C: 1 year
1st and 3rd Thur of the month
RadioImmunoassay (C4a Level);C4ades Arg Level;C4ades Arg Level (C4a Level);C4 (C4a Level);C4 anaphylatoxin (C4a Level);C4a anaphylatoxin;Complement (C4a Level)
Human Male: 0-2830 ng/mL
Human Female: 0-2830 ng/mL