View clinical trials related to Hemophilia A.
Filter by:This study will investigate the pharmacokinetics (PK), efficacy, and safety of rIX-FP for the routine prophylaxis of bleeding episodes in male Chinese previously treated patients (PTPs) with hemophilia B (FIX activity of ≤ 2%). In addition to the scheduled rIX-FP prophylaxis regimen, subjects may also receive rIX-FP episodic (on-demand) treatment for breakthrough bleeding episodes and rIX-FP for the prophylaxis and treatment of bleeding in emergency surgical procedures.
Participants in this study have a genetic mutation, specifically in the coagulation (blood clotting) Factor 9 gene that causes severe or moderately severe hemophilia B. This study is researching an experimental gene insertion therapy (the adding of a gene into your DNA) called REGV131-LNP1265, also called the "study drug". Gene insertion therapy aims to teach the body how to produce clotting factor long-term, without the need for factor replacement therapy. The main aim of this study is to find a safe and well-tolerated dose of the study drug by checking the side effects that may happen from taking it. The study is looking at several other research questions including: - How much study drug is in the blood at different times - Whether the body makes antibodies against parts of the study drug, which could make the drug less effective or could lead to side effects. Antibodies are proteins produced by the body's immune system in response to a foreign substance - Whether the body makes antibodies against the clotting factor replacement therapy - How quality of life is affected by hemophilia B and if it changes after taking study drug - How joint health is affected by hemophilia B and if it changes after taking study drug - How often visits are required for the emergency room, urgent care center, physician's office, hospital, telephone or online are required as a result of bleeding events, and if the frequency changes after taking study drug - How often factor replacement therapy is needed, both on a regular basis for prevention of bleeding, and as needed to treat bleeding events (and it if changes after taking study drug) - Whether there is a difference in 2 different methods for measuring Factor 9 activity in the blood
This observational study consists of two parts. In part one, case scenario focus groups with hemophilia A patients and healthcare providers (HCPs) will be held. This parts aims to identify potential use scenarios of a point of care (POC) in vitro medical for patients with hemophilia A. The main questions it aims to answer are: - How is coagulation lab testing for patients with hemophilia A currently organized? - What is the interest and what are desired alternatives of a POC in-vitro diagnostic medical device for patients with hemophilia A? Part two of the study consists of a use scenario study in which patients with hemophilia A and HCPs will evaluate two types of non-functional mock-ups of a POC in vitro medical device. The main goal of this part is to evaluate the usability of the current prototypes of the POC device.
This study is a single arm, open, multicenter clinical trial in which the previous treated severe hemophilia A patients receive recombinant human coagulation factor VIII for injection to evaluate the efficacy and safety of on-demand treatment in the event of new bleeding events. If evaluable surgical cases occur, the overall efficacy and safety of recombinant human coagulation factor VIII for injection as a replacement therapy for severe hemophilia A PTPs during the perioperative period will be evaluated.
Introduction: Hemophilic ankle arthropathy is manifested by functional degenerative alterations, intra-articular alterations, and chronic pain. Manual therapy techniques are used in the treatment of hemophilic ankle arthropathy for the improvement of pain and mobility. Design. Double-blind randomized pilot trial. Aimed: To evaluate the ultrasound changes by means of Doppler imaging after manual therapy intervention. Patients: A total of 20 adult patients with hemophilic ankle arthropathy will be recruited. Intervention: Each manual therapy session will last approximately 50 minutes, with 1 session per week for a period of 3 weeks. The treatment program includes 10 techniques that will be administered bilaterally. Measuring instruments: Patients will be evaluated qualitatively with ultrasound (HEAD-US scale) and assessment with Doppler ultrasound. The clinical variables will be joint damage (Hemophilia Joint Health Score) and pain intensity (Visual Analogue Scale). Expected results: Check the safety of manual therapy in patients with hemophilia regarding subclinical bleeding. Assess changes related to joint inflammatory state with imaging techniques. Observe changes in pain intensity and joint damage.
Background of the study: To measure blood clotting, blood is taken from a vein. This blood is processed in the laboratory and then tested. A new device has been developed that requires only a very small volume of blood (5-10 drops of blood) to perform the laboratory tests. The long-term goal is that this device can be used by a doctor or at home to quickly measure blood clotting. In this research we want to compare this new system with the standard methods - measurement in the laboratory - and evaluate whether the correct value is determined. Objective of the study: The primary objective of this study is to demonstrate that the EnzySystem HemA version A can record thrombin generation TG and quantify FVIII activity levels within a time frame of 60 min in fresh whole blood samples of healthy volunteers and patients with hemophilia A in the Enzyre laboratory (for healthy volunteers) and the Radboudumc (for patients with hemophilia A). Study design: This is a cross-sectional observational study. All participants are asked to fill a questionnaire prior to blood collection. The blood of healthy volunteers will be collected in an office of Enzyre BV, the blood of patients will be collected in the Radboudumc. Blood collection, by venepuncture, will be conducted by a Radboudumc research nurse or physician of the research team in both locations. In total, four blood tubes with citrate as anticoagulant will be drawn (a total of around 11 mL). Study population: The study population consists of 20 healthy volunteers: evenly distributed between male and female; ages spread over the range from 20 to 70 years old; recruited by Enzyre via advertisement. 20 Patients: 5 severe hemophilia A; 5 moderate hemophilia A; 10 mild hemophilia A; recruited from the Hemophilia Treatment Center (HTC) Nijmegen-Eindhoven-Maastricht (NEM) (location Radboudumc). Primary study parameters/outcome of the study: Demonstrate that the EnzySystem HemA version A can record TG and quantitative FVIII activity levels within a time frame of 60 min in fresh blood samples of healthy volunteers and patients with hemophilia A. Secondary study parameters/outcome of the study (if applicable): Secondary study parameters are composed whether the measured values comply with the desired assay specificity and accuracy. Outcomes are analysed for equivalence compared to one-stage FVIII assay, FVIII chromogenic assay, thrombin generation via the Nijmegen Hemostasis Assay, and possibly via the Technoclone assay. Is it possible to measure FVIII activity with the EnzySystem HemA version A in fresh blood samples of healthy volunteers and patients with hemophilia A, compared to the gold standard with; - Precision in the normal range (60-140%): min. 30% - Precision in the low range (3-10%): min. 50% - Limit of Detection range min. 100 % FVIII activity - Limit of Detection low range min. 3 % FVIII activity Is it possible to measure TG with the EnzySystem HemA version A in fresh blood samples of healthy volunteers and patients with hemophilia A, compared to the gold standard with; - Precision in the normal range (60-140%) of control samples: min. 30% - Precision in patient with hemophilia A: min. 50% - Limit of Detection, high range > 400 nM thrombin activity - Limit of Detection measured with Plasma, low range < 50 nM thrombin Other study parameters All samples will also be tested for other hemostasis specific parameters as these parameters may affect a proper measurement of both FVIII activity and Thrombin Generation. The following parameters will be measured in plasma obtained from the whole blood vacutainers. Moreover, left over samples (plasma) will eventually be used to develop other coagulation related parameters. - von Willebrand Factor antigen levels - von Willebrand Factor ristocetin activity levels - Prothrombin Fragment 1+2 levels - ADAMTS13 activity - FVIII antigen levels - blood group
Introduction: Hemophilic arthropathy is characterized by functional alterations, disabling physical sequelae, and chronic pain. Conditioned pain modulation describes the net effect of endogenous pathways that enhance or diminish the effects of afferent noxious stimuli. Objectives: To describe conditioned pain modulation in patients with hemophilia and identify the best predictive model of conditioned pain modulation in these patients Methods: Cross-sectional cohort study. 51 patients with hemophilic arthropathy will be recruited in 3 regions of Spain. The main study variable will be the conditional pain modulation (Conditioned Pain Modulation Index, using an ischemic technique of the arm using the pain pressure threshold as a test stimulus), with age being the dependent variable. The secondary variables, estimated as modifying or confounding variables, will be kinesiophobia (Tampa Scale for Kinesiophobia), catastrophizing (Pain Catstrophizing Scale), trait and state anxiety (State-Trait Anxiety Inventory) and the main clinical, anthropometric, and sociodemographic. Expected results: Identify the degree of modulation conditioned by pain in patients with hemophilic arthropathy. Identify the best predictive model for conditioned pain modulation in these patients based on the study variables
This is an early phase 1, open-label, single-center, dose-escalation pilot trial to evaluate the safety and efficacy of an intravenous infusion of NGGT003 in hemophilia A patients. NGGT003 uses adeno-associated virus (AAV) as a vector, carrying a liver specific promoter and codon optimized human FVIII gene B domain deletion mutant (hFVIII BDD), and expresses human FVIII protein in the liver through intravenous injection.
The primary goal of this observational study is to determine if: - health-related quality of life of boys with moderate/severe hemophilia A who are followed in Canadian pediatric hemophilia treatment centres is significantly different for boys receiving an intravenously administered factor replacement product compared to a subcutaneously administered non-factor replacement product, as measured at the 3 month time-point. - Burden of caring for a boy with moderate/severe hemophilia A is significantly different for parents/caregivers of boys with moderate/severe hemophilia A receiving an intravenously administered factor replacement product compared to a subcutaneously administered non-factor replacement product, as measured at the 3 month time-point. Persons with hemophilia and their caregivers will complete questionnaires at baseline, three months, six months, and one week after six months.
Cell-free fetal DNA (cffDNA) is present in the maternal blood from the early first trimester of gestation and makes up 5%-20% of the total circulating cell-free DNA (cfDNA) in maternal plasma. Its presence in maternal plasma has allowed development of noninvasive prenatal diagnosis for single-gene disorders (SGD-NIPD). This can be performed from 9 weeks of amenorrhea and offers an early, safe and accurate definitive diagnosis without the miscarriage risk associated with invasive procedures. One of the major difficulties is distinguishing fetal genotype in the high background of maternal cfDNA, which leads to several technical and analytical challenges. Besides, unlike noninvasive prenatal testing for aneuploidy, NIPD for monogenic diseases represent a smaller market opportunity, and many cases must be provided on a bespoke, patient- or disease-specific basis. As a result, implementation of SGD-NIPD remained sparse, with most testing being delivered in a research setting. The present project aims to take advantage of the unique French collaborative network to make SGD-NIPD possible for theoretically any monogenic disorder and any family.