Whole blood in 3.2% sodium citrate tube (blue top) AND an EDTA tube (purple top)
Fill one 3.2% citrated blue top tube (1.8 ml) to the blue fill indicator marked on the label. Do not short fill or over fill the citrate tube as this will cause erroneous results and the sample will be rejected. Fill one EDTA tube at least halfway. Immediately spin and separate the citrated plasma. Freeze the sample and ship the sample frozen on an ice pack. Send EDTA whole blood refrigerated.
Screen includes: PT, APTT, and platelet count