MinnesotaA pig kidney stored a year at -150 °C made urine.

Donor organs now survive only 24 to 36 hours before transplant, which limits matching.

Iron oxide nanoparticles infused into the kidney release heat under an electromagnetic field, rewarming it evenly from the glass-like state.

The rewarmed kidneys made about two-thirds the expected urine and showed injury from the cryoprotectant chemicals, the researchers said.

The preprint is not yet peer-reviewed, and the team next tests the kidneys in pigs for longer.

How each outlet framed it
MIT Technology Review leans favorable
stresses that the kidneys were stored at -150 °C for over a year and rewarmed, with the team's transplant surgeon describing the result as 'a big deal'

Sources: MIT Technology Review