View clinical trials related to Von Willebrand Diseases.
Filter by:This is a single-center randomized phase III clinical trial, the VWD-Woman Trial, in which 20 pregnant subjects with von Willebrand disease (VWD), defined as VWF ristocetin co-factor activity (VWF:RCo) <0.50 IU/ml (historic) and previous history of bleeding are enrolled. Subjects will include women with VWD age 18 years and older, excluding those who have a bleeding disorder other than VWD. Once enrolled, subjects who meet all of the inclusion and none of the exclusion criteria will be randomized to recombinant Von Willebrand factor (rVWF, Vonvendi ®) with Tranexamic Acid (TA, Cyclokapron®); or recombinant Von Willebrand factor (rVWF, Vonvendi®) alone to prevent postpartum hemorrhage after vaginal or caesarean delivery. The primary endpoint is quantitative blood loss (QBL) by a labor suite nurse at delivery. Secondary endpoints include safety assessment for postpartum lochial blood loss by Pictorial Blood Assessment Chart (PBAC), transfusion, blood products, thromboembolic events, and hysterectomy within 21 days; and mechanism of PPH reduction by VWF assays (VWF:RCo, VWF:Ag, VIII:C), fibrinogen, and d-dimer. Blood draws are at 5 time points, including at 36 weeks' gestation (screening), on admission for childbirth, and at 1 day, 2 days, and 21 days after delivery. The VWD-Woman Trial is considered greater than minimal risk as study drugs are given at delivery and special coagulation studies are obtained.
In pregnant women with von Willebrand disease (VWD) who by the third trimester do not have von Willebrand factor (VWF) or factor VIII (FVIII) levels greater than 50-100%, specific guidance is lacking for delivery planning in terms of how high of a VWF level should be achieved to reduce bleeding. This is a prospective, open-label, cohort study in women with VWD using Wilate VWF replacement therapy to maintain trough or minimum VWF levels of 100-150% for delivery and the immediate postpartum period, followed by levels of 50-100% for 5-10 days after delivery, depending upon the route of delivery. The primary objective is to document the rate of primary postpartum hemorrhage (PPH). The secondary objective is to document further effectiveness outcomes and safety.
In Willebrand disease, there is currently no test available to identify non-invasively patients with a high risk of bleeding from angiodysplasias The study propose to use a sublingual capillary bed analysis by video-microscopy, a sensitive, reproducible and non-invasive technique, to assess whether sublingual capillary density is predictive of hemorrhagic risk for patients with von Willebrand disease.
MOdalities of use, effectiveNEss and TOlerability of Eqwilate® a balanced combInatiON of VWF and FVIII in von WillEbrand patients in real-life conditions: the ONE-TO-ONE study
The main aim of the study is to check effectiveness of rVWF (vonicog alfa) prophylaxis based on the annualized bleeding rate (ABR) of spontaneous (not related to trauma) bleeding episodes in pediatric and adult participants during the first 12 months on study treatment. The participants will be treated with rVWF for a maximum of 3 years. Their von Willebrand Disease will be treated according to Investigational product (IP) dosing directions.
Currently, the exploration of primary hemostasis (a physiological phenomenon used to stop bleeding) is imperfect because it is based on targeted tests for platelets or von Willebrand factor, without taking into account blood flow and other blood cells (red and white blood cells). Tests for whole blood and flow conditions exist, but there is currently no test that comes close to actual physiological conditions. An exploration of whole blood haemostasis in a device that is similar to a blood vessel and at different flow conditions (venous and arterial) could help to better identify the risk of bleeding in predisposed patients (von Willebrand factor deficiency, antiplatelet therapy). The objective of the study is to evaluate the performance of this new hemostasis test in whole blood and under flow conditions. Participation in the study is ad hoc and is limited to adding a maximum of 4 citrated tubes (20 mL or the equivalent of 4 teaspoons) and 1 EDTA tube (5mL) to a routine blood sample (for patients) or during blood donation (for controls).
The investigators are going to study von Willebrand antigen and activity levels in patients with inflammatory bowel disease. The study will be on 46 patients who were diagnosed with inflammatory bowel disease mainly ulcerative colitis and Crohn's disease divided into two arms; group A will include 23 cases with active IBD(cases)status and group B will include 23 cases with inactive IBD status(control) to compare the vWF antigen and activity ( expected to be higher in active disease group. The investigators will follow all of the patients for any arterial or venous thrombosis to evaluate IBD as a risk factor of thrombosis, on the other hand, they are looking to detect cases of acquired von Willebrand syndrome in some cases with bleeding that not explained by the inflammatory bowel disease status. The aim of the work: 1. Assessment of VWF antigen in patients with inflammatory bowel disease and correlate it to disease activity. 2. Evaluation of VWF antigen as a risk factor for thrombosis in inflammatory bowel disease patients. 3. Detection of acquired von Willebrand disease in inflammatory bowel disease.
The primary aim of this study is to prospectively investigate the current bleeding tendency of children and adults with VWD.
The WBDR is an international observational disease registry of patients with hemophilia. It will provide a platform for a network of hemophilia treatment centres (HTCs) around the world to collect uniform and standardized patient data and guide clinical practice. With informed consent from the patient, the WBDR stores anonymous data about the person's disease, such as hemophilia type and severity, symptoms, and treatment.
The Low Von Willebrand in Ireland Cohort (LoVIC) study focuses on the bleeding phenotype and biological mechanisms underlying low Von Willebrand Factor (VWF) levels.