Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. If you need assistance understanding the eligibility criteria, please contact the study team.See eligibility criteria
- Adult females 18-45 years of age.
- Mild or moderate type 1 von Willebrand disease (VWF:RCo <0.50 IU/ml, normal multimers, past bleeding.
- Menorrhagia and a PBAC >100 in at least one of the last two menstrual cycles.
- Regular menses, at least every 21-35 days.
- Willingness to have blood drawn.
- No prior history of an allergic reaction or anaphylaxis to rVWF or TA.
- Willingness to avoid ASA and nonsteroidal anti-inflammatory agents (NSAIDS) during the study.
- Willingness to comply with randomization to rVWF or TA study arms.
- Willingness to keep a personal diary of menorrhagia bleeding frequency duration and severity by pictorial blood assessment chart, and any drugs or hemostatic agents taken.
- Willingness to make 4 visits, undergo blood sampling for coagulation studies, and accept randomization of two therapies for each of four consecutive menstrual cycles, including an end-of-study visit.
- Willingness to use "double-barrier" method of contraception during the study.
- Any bleeding disorder other than von Willebrand disease; or past thrombotic disease
- Pregnant or lactating, or use of hormones or oral contraceptives or contraceptive implant in past 3 months.
- Platelet count < 100,000/ul.
- Use of immunomodulatory or experimental drugs.
- Surgery within the past 8 weeks.
- Concomitant use of antiplatelet drugs, anticoagulants, dextran, aspirin or NSAIDs.
- Treatment with DDAVP, cryoprecipitate, whole blood, plasma and plasma derivatives containing VWF within 5 days of study.
- Inability to comply with study requirements.
- Hypothyroidism as defined by elevated TSH.
- Iron deficiency as defined by low serum ferritin, unless iron replacement has been initiated.
- History of renal disease.