Machine Perfusion System (image) NIH/National Institute of Biomedical Imaging & Bioengineering Share Print E-Mail Caption The liver is perfused with a solution in this pump system before and after supercooling preservation. The blue color is caused by antifreeze that surrounds the components of the system to regulate the temperature. Credit Source: Wally Reeves, Korkut Uygun, Maish Yarmush, Harvard University Usage Restrictions Please site proper source. Share Print E-Mail 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.