The Emo-test is a functional test intended for the detection of Heparin Induced Platelet Activation in human plasma or serum using flow cytometry; for research studies related to Heparin Induced Thrombocytopenia (HIT). It quantifies the level of platelet activation by detecting two surface markers-a platelet marker, CD41 and an activated platelet marker, CD62- after a suspected HIT sample (human plasma or serum) has been incubated with two different concentrations of heparin; one low (0.3IU/mL) and one high (100/IU/ml).