View clinical trials related to Von Willebrand Diseases.
Filter by:The EMPOWER trial is a pilot multi-center, placebo-controlled (normal saline), double-blind (patient and outcome assessor), crossover, 2-year randomized trial in female outpatients with von Willebrand disease (VWD) and heavy menstrual bleeding to determine trial feasibility and viability, and to explore assay sensitivity of the proposed efficacy clinical outcomes for a definitive randomized controlled trial
Cerebral microbleeds (CMBs) are haemosiderin deposits, resulting from the leakage of erythrocytes from small cerebral vessels, which can be detected noninvasively using susceptibility-sensitive magnetic resonance imaging (MRI) techniques. CMBs are commonly observed in daily practice: their prevalence range from five percent in healthy individuals over 65 years old to 50% in patients with a history of stroke. CMBs are associated with intracerebral hemorrhage (ICH) and also cognitive impairment and dementia. The pathophysiology of CMBs is thought to primarily involve damage to brain microvasculature but the exact underlying cascade of events, including a potential role for haemostasis, has yet to be elucidated. Haemostatic defects (congenital or acquired) may contribute to an increased number and importance of CMBs. Congenital bleeding disorders such as haemophilia or von Willebrand disease (vWD), populations at high risk of ICH, are unique conditions that may give us further insights into a potential role of haemostatic defects in the pathophysiology of CMBs. CMBs might be the missing link between severe haemostatic defects, ICH risk and cognitive function. We hypothesized that severe congenital haemostatic defects could contribute to an increased prevalence and number of CMBs, with an impact on cognition in adulthood.
The goal of this multicenter prospective observational study and registry of U.S. adolescents and young adults with heritable bleeding disorders is to determine the bleeding outcomes, satisfaction, hemostatic parameter changes, and patient reported quality of life after 6 months of use of either of two commonly used hormonal treatments for menstrual suppression - levonorgestrel intrauterine device (LNG-IUD) and norethindrone acetate (NETA). Under this application we will compare the two treatments and compare outcomes after LNG-IUD treatment results to a control group without a bleeding disorder, with the goal of determining the benefits and expected outcomes of these treatment options for this population.
The main aim of the study is to evaluate the effectiveness of prophylaxis with recombinant von Willebrand factor (rVWF) in children. This study will enroll those participants who have been previously treated with VWF product or with a plasma-derived VWF (pdVWF) product. In this study, participants will be treated with rVWF for 12 months. During the study, participants will visit the study clinic 6 times after treatment initiation.
Establish a Latin-American network of centers and professionals with the aim of: - To register VWD patients in retrospective/prospective study, using a database, available online, common to all - To register the bleeding history, the treatment and the events of VWD patients in the region - To investigate the influence of VWD on quality of life
Hemophilia A and B are bleeding disorders caused by deficiency of factor VIII and IX, respectively. The deficiency of one of these coagulation factors is due to a mutation on the X chromosome. Accordingly replacement of the deficient factor is currently the main treatment for these disorders. The most disappointing complication of replacement therapy in hemophilia is the development of inhibitors. Unlike haemophilia , inhibitor development in patients with V Willebrand's Disease (VWD) is a rare complication of treatment. Studies on inhibitors whether on hemophilia or VWD are limited in our region. This study aims to 1. To estimate the frequency of factor inhibitors in hemophilia and VWD patients in our region. 2. To investigate modifiable risk factors associated with development of inhibitors in both diseases. 3. To correlate the level of inhibitor with the clinical presentation of the patients. 4. To assess influence of factor inhibitors on quality of life in patients who developed factor inhibitors in both diseases.
Applying the ISTH-BAT questionnaire on Egyptian patients with type I VWD aiming to correlate the BS with the laboratory findings
The present study will focus on the investigation of the global contribution and limitations of the multimeric analysis and mutation analysis in the VWD diagnostic process. 1. To quantify the bleeding symptoms using bleeding assessment tools (BAT) which has developed by The International Society on Thrombosis and Haemostasis (ISTH) and correlate it to the diagnosis of different subtypes of VWD in Egyptian population. 2. To assess the utility of (gain of function mutant GpIbα binding) as a recent functional assay that measures VWF activity in VWD patients. 3. Clarify how the recent laboratory diagnostic modalities are required to streamline diagnosis , classification and improve treatment of VWD patients. 4. Explore how the molecular analysis can resolve many of the drawbacks and limitations of phenotyping diagnosis (in Egyptian population which not studied before).