Open Device (IMAGE) Michigan Medicine - University of Michigan Caption Inside the wearable device, the blood pump sits in the upper left corner while the heparin injector runs the length of the near side of the box. The green circuit boards control the blood pump, heparin injector and provide display data. Credit Tae Hyun Kim Usage Restrictions for use in stories about this research 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.