Aspirin Response Assay 3.6µl Arachidonic Acid and 0.2 ml blood will be added to a micro tube (2ml), (final Arachidonic Acid concentration 0.275 mM). The tube will be rotated on the tube mixer at 10 rpm for 1 minute. 130 µl will be placed in a well and tested with the cone and platelet analyzer.