laboratory diagnostic - coagulation - Factor X, Anti-Xa activity : low molecular weight heparin - LMWH , citrated plasma 1ml. The plasma must be frozen within 1 hour after collection and must be sent in the frozen samples container.ALWAYS specify the current anticoagulant treatment (dosage) and the injection and sampling times. sample 3 to 4 hours after subcutaneous injection of Lovenox®, Fragmine®, Fraxiparine® , Clivarine® or 4 to 6 hours after subcutaneous injection of Innohep® or Fraxodi® Chronometric, ssso, todylaboratories®, bmn, code L16LD1566