Intelligent Blood Bags (IMAGE) Fraunhofer-Gesellschaft Caption Blood bags that are not needed during an operation can only be reused if the cold chain has been maintained. In the future, a radio node attached to the blood bag will constantly monitor the temperature. Credit Universitätsklinikum Erlangen 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.