A special storage machine could be better than ice for keeping donor kidneys fresh for transplantation, say scientists.
Kidneys were less likely to fail within a year when stored this way, compared with being packed in ice for transportation.
The European trial involving 366 pairs of kidneys, was published in the New England Journal of Medicine.
Advice on the use of the machines in the NHS are expected this month.
One-year survival was better in the machine stored kidneys - 94% compared with 90%, and 70 out of 336 recipients developed "delayed function" compared with 89 out of 336 who received an ice-stored kidney.