Plasma

Refer to Blue Top Tube (3.2% Sodium Citrate) Collection Instructions

1. Collect blood and centrifuge the tube at 3000 rpm for 10 minutes.
2. Immediately transfer the plasma to a stoppered, plastic tube and centrifuge again at 3000 rpm for 10 minutes. 
3. Transfer the supernatant plasma into a screw-capped, plastic vial and send frozen at ≤ -20° C, if possible.
4. If unable to centrifuge, forward the unprocessed sodium citrate whole blood (minimum volume: 4 mL) to the laboratory promptly at room temperature only.

Unspun specimens must arrive within 2 hours of collection.

85250 - Factor IX Assay (EAP 30020700)
85335 - Factor IX Inhibitor-if performed (EAP 30020720)

FIX "Coagulation Factor IX (9) Assay" will be performed and resulted in addition to the inhibitor assay.  If FIX "Coagulation Factor IX (9) Assay" is > 15 %, the inhibitor assay will not be performed.