https://www.youtube.com/watch?v=4wu-awJxnv0 for video of an earlier prototype from 6 years ago, and http://www.npr.org/blogs/health/2014/02/07/273174533/lung-in-a-box-keeps-organs-breathing-before-transplants for information on the general concept.
The video link didn't work for me for some reason, but I was able to watch it on their youtube channel here, in case anyone else has the same issue
Primary source: http://transplants.ucla.edu/
"A new medical device is keeping hearts warm and beating during transport, something that could be a major breakthrough in transplant history."
Video (the episode contains other news as well):
http://www.aljazeera.com/programmes/techknow/2014/04/heart-box-201442013591803545.html