Implant to Replace Defective Venous Valve (IMAGE) Fraunhofer-Gesellschaft Caption The finished venous valve is highly durable. Credit Helmholtz-Institute of Biomedical Engineering of RWTH Aachen Usage Restrictions The picture may be used for editorial purposes only. It is protected by copyright. The use is free of charge if the reference is mentioned. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.