When is a factor X assay indicated?

Updated: Feb 06, 2020
  • Author: George Ansstas, MD; Chief Editor: Eric B Staros, MD  more...
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Factor X testing is indicated for the following:

  • When factor X deficiency is suspected

  • To measure blood heparin (particularly low molecular weight heparin) for factor Xa inhibition, indicating level of anticoagulation

  • When therapeutic inhibitors of Xa are used to find out the level of anticoagulation

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