Replacement therapy is a treatment that replaces something that's missing or not working well in your body. People with von Willebrand's disease don't have von Willebrand factor, or it doesn't work well enough to help clot their blood. This disease can be treated by injecting (infusing) a purified form of clotting factors into a vein. These clotting factors include von Willebrand factor and factor VIII. Infusions of clotting factors help blood to clot normally.
Replacement therapy injections (also called infusions) may be used with people who: