laboratory diagnostic - coagulation - Antithrombin - functional activity, Citrated Plasma 1ml, Specify the treatment and circumstances of the request. The score is not cumulable with that of antithrombin antigen. Non-fractionated heparin may result in a moderate decrease; this is lower with LMWH. In the event of treatment, the assay may be performed. A deficiency is eliminated if the antithrombin is normal; in the event of a lowered result, a follow-up test will be requested excluding any treatment. In the case of an emergency, the family investigation may provide presumptive diagnostic assistance 1 specific aliquot for this analysis. The plasma must be frozen within 1 hour after collection and must be sent in the frozen samples container, Chromogenic, ssso, todylaboratories®, code L76LD1536