Table 1.

Hepatocellular and cholangiocellular viability criteria for human donor livers during NMP^a.

VITTAL criteria	Groningen criteria
Hepatocellular criteria	Hepatocellular criteria	Cholangiocellular criteria
Lactate clearance	Lactate clearance	Delta bile pH
At least two of the following criteria	Perfusate pH stabilization	Delta bile bicarbonate
	Bile production	Delta bile glucose
- Bile production
- Perfusate pH stabilization
- Metabolism of glucose
- Stable flows
- Homogenous perfusion

^aThe VITTAL criteria had to be met within 4 h of NMP, the Groningen criteria within 2.5 h of NMP^1,8.