Videomicroscopy for the Prediction of Bleeding in Constitutional Haemorrhagic Diseases

This study is using a cutting-edge microscopy technique to observe how blood vessels and platelets behave in patients with inherited bleeding disorders, including von Willebrand disease, Glanzmann Thrombasthenia, moderate to severe Hemophilia A, and women who carry the hemophilia gene. Understanding exactly how blood clotting is impaired at the microscopic level may help doctors better predict bleeding risk and guide treatment decisions for these patients. You may be eligible if: - You are an adult (18 years or older) - You have been diagnosed with a significant form of von Willebrand disease (according to the French Willebrand Disease Reference Center criteria), Glanzmann Thrombasthenia, moderate to severe Hemophilia A, or you are a woman who carries the hemophilia gene - You are enrolled in the French social security system You may NOT be eligible if: - You are under 18 years old - You refuse to give consent - You are under a legal protection order - You are pregnant Talk to your hematologist if you have a diagnosed inherited bleeding disorder — this study may offer deeper insight into how your condition affects clotting at the microscopic level, potentially improving the way your care is managed.