Which coagulation study findings suggest factor X deficiency?

Updated: Feb 18, 2020
  • Author: Robert A Schwartz, MD, MPH; Chief Editor: Perumal Thiagarajan, MD  more...
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Coagulation study findings in patients with factor X deficiency include the following:

  • The prothrombin time (PT) is prolonged

  • The activated partial thromboplastin time (aPTT) is prolonged

  • The Russell viper venom time (RVVT) is prolonged; Russell viper venom cleaves factor X to produce active factor Xa

  • Bleeding time is within the reference range

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