HEPARINS: INTERFERENCE IN ARGATROBAN MEASUREMENT

HEPARINS: INTERFERENCE IN ARGATROBAN MEASUREMENT

Promoteur : University Hospital, Strasbourg, France

Titre et résumé fournis en anglais par le registre source, reproduits sans traduction ni interprétation.

Unfractionated heparin (UFH) and low molecular weight heparins (LMWH) provide anticoagulation through their anti-Xa and anti-IIa activity. This anti-IIa activity can lead to an overestimation of argatroban's activity when switching to an anti-IIa anticoagulant such as argatroban. This situation can be critical because argatroban is generally administered following heparin therapy due to suspected heparin-induced thrombocytopenia. Therefore, there is both a significant thrombotic risk induced by the underlying condition and a hemorrhagic risk induced by the anticoagulation. For this reason, it is important to be able to accurately monitor the anti-IIa activity of argatroban. To date, the test used to determine the anti-IIa activity of argatroban at the Hematology Laboratory of the Strasbourg University Hospitals (HUS) is a modified thrombin time (with a calibration curve adapted for argatroban). When switching between several molecules with anti-IIa activity, this test does not allow for the differentiation of the anti-IIa activity attributable to each anticoagulant. There are no data in the literature to determine whether heparins interfere with this test, and if so, its extent.