The PFA (platelet function analysis) test is prescribed for the exploration of primary hemostasis and the study of platelet-willebrand factor interaction. It is performed using citrated blood, with technical difficulties and frequent alarms that may be linked to the choice of anticoagulant (citrate). It is proposed to compare the results obtained with a conventional citrate tube and a BAPA tube, which is an anticoagulant used in clinical research and which blocks coagulation by another mechanism that would have less impact on blood platelets.
Person having given their non-opposition
Person of legal age
Person receiving a haemostasis consultation at the haemophilia and haemorrhagic diseases treatment center followed by a blood sample with a PFA test prescribed by the doctor (the test is not added for the study).
persons under legal protection (curatorship, guardianship)
persons subject to a court protection order
pregnant, parturient or breast-feeding women
adult incapable or unable to give consent
Patients requiring a PFA test
Cohort
Prospective
Sampling of 3 additional BAPA tubes
Biological/Vaccinethe 3 additional tubes will be taken at the same time as the blood sample taken for the routine PFA test
Occlusion time measurement
Measurement of the occlusion times of the 2 cartridges (collagen/ADP and collagen/epinephrine) with the classic 0.109M citrate tube and the BAPA tube, with any PLC alarms and observation of the stained blood smears.
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