Whole blood in 3.2% sodium citrate tube (blue top) and EDTA tube (lavender 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 tubes as this will cause erroneous results and sample will be rejected. Fill one EDTA tube at least halfway.
Includes: PT, APTT, D-dimer, and platelet count. Under filling of the blue top tube may result in false prolongation of coagulation times.