Scientists still struggle to freeze donor hearts for longer than six hours, but it is now possible to store a different organ — livers — at subzero temperatures for more than a day.
If whole organs could be frozen and stored … surgeons would be able to perform far more transplants…. For all their efforts, though, cryobiologists have not been very successful with organ freezing…. Nobody to date has cooled whole mammalian hearts any lower [than −20° Celsius] or longer [than six hours] and revived them.
Scientists still struggle to keep donor hearts on ice for longer than six hours, but it is now possible to store a different organ — the liver — at below-freezing temperatures for more than a day. The challenge has been figuring out how to stop ice from crystallizing and damaging cells. In 2019, scientists reported successfully warming up several human livers after
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