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Updated: Mar 11, 2026

Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay
Published on: September 9, 2012
Acquired Factor V Inhibitors in a Patient with End-stage Renal Disease
Atsushi Kitazawa1, Hideo Misawa, Katsuhiro Nagahori
1Nephrology, Dokkyo Medical University Koshigaya Hospital, Japan.
Abstract:
We report a case of acquired factor V inhibitors (AFVIs) in a patient with end-stage renal disease receiving warfarin therapy for atrial fibrillation. A 72-year-old Japanese man was admitted to our hospital complaining of tarry stools and abdominal pain. The laboratory findings revealed eosinophilia (52.1%), prolonged activated partial thromboplastin time (APTT) (98 s), PT (84 s), a factor V (FV) activity of <3%, and an FV inhibitor level of 6 Bethesda units/mL. After administration of prednisolone was started, his coagulation findings improved. However, his renal failure progressed, and he ultimately required chronic hemodialysis. This is the first case of AFVIs in a patient starting hemodialysis for end-stage renal disease.
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