Coagulation
Coagulation laboratory tests
Factor IX assay



Topic Completed: 1 November 2012

Revised: 7 January 2019, last major update November 2012

Copyright: (c) 2002-2016, PathologyOutlines.com, Inc.

PubMed Search: Factor IX assay [title]


Page views in 2018: 15
Page views in 2019 to date: 5
Cite this page: Parsons J. Factor IX assay. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/coagulationfactorIX.html. Accessed December 6th, 2019.
Definition / general
  • To detect congenital or acquired factor IX deficiency
  • Congenital factor IX deficiency (hemophilia B) is inherited as a sex - linked recessive in 1 per 30,000 males
  • Acquired factor IX deficiency is seen in liver disease, vitamin K deficiency, Coumadin therapy
  • A linear, dose - dependent, false decrease is caused by bivalirudin, lepirudin, argatroban, and fondaparinux (Arch Pathol Lab Med 2004;128:1142)
Back to top