Machine Perfusion to Preserve Rat Liver (image) Massachusetts General Hospital Caption In a system developed at the Mass. General Hospital Center for Engineering in Medicine, perfusion of a rat liver with preservative solutions before and after supercooling helped enable successful transplantation after up to four days. Credit MGH Photography Department Usage Restrictions None 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.