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Study identifier: NCT04131036 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

Effects of Emicizumab vs. Factor VIII Prophylaxis on Joint and Bone Health in Severe Hemophilia A

Condition: Hemophilia A  ·  Sponsor: Washington Institute for Coagulation

PhaseN/A
Planned participants40
Who can joinMale, 16 Years to no upper limit
Healthy volunteersNo

About this study

The investigators propose to study longitudinal joint and bone density changes in patients with severe Hemophilia A. Per current standard of care, most patients are on prophylactic FVIII replacement therapy intravenously several times weekly with a goal of keeping the trough \>1% FVIII. Recent phase 3 data suggest superior bleed protection with emicizumab prophylaxis every 1-2 weeks. It is the purpose of this study to longitudinally assess joint health and bone density over 3 years and to compare the effect of routine factor VIII prophylaxis with emicizumab prophylaxis.

This description comes directly from the study's public registry record.

Talk to the study team

Rebecca Kruse-Jarres, MD, MPH  ·  206-614-1200  ·  RKJ@WACBD.org

Cassandra Bryan  ·  206-681-9072  ·  cassandra.bryan@wacbd.org

Always discuss trial participation with your own doctor first.

Locations (4)

Orthopedic Hemophilia Treatment CenterLos Angeles, California, United StatesNot Yet Recruiting
Hemophilia and Thrombosis Treatment Center, University of California, San DiegoSan Diego, California, United StatesRecruiting
The University of Texas Health Science Center at San AntonioSan Antonio, Texas, United StatesRecruiting
Washington Center for Bleeding Disorders at Washington Institute for CoagulationSeattle, Washington, United StatesRecruiting

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Source record: clinicaltrials.gov/study/NCT04131036