An Introduction to the Fundamentals of Coagulation: Overview of Secondary Hemostasis

Secondary Hemostasis – The Intrinsic Pathway

  • Then, activated factor IX (IXa), along with ionized calcium, platelet factor, and factor VIII, activate factor X, which is a direct precursor of thrombin in the common pathway.
  • The activation of factor X signals the beginning of the common pathway.
  • The activated partial thromboplastin time (APTT) is used to monitor the intrinsic pathway and the effectiveness of heparin therapy.

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