In US and Canada: For Research Use Only. Not for Use in Diagnostic Procedures. For determination of activated partial Thromboplastin Time (aPTT) on citrated human plasma, using a manual, semi-automated clotting method with liquid reagents ready to use. This reagent offers a good sensitivity to the presence of Lupus Anticoagulant and can be used for an exploration of Lupus Anticoagulant.