FIGURE 4.

Portal vein flow rates during pressure-controlled NMP using (A) acellular perfusate (NMP-acellular) vs (B) cellular perfusate (NMP-RBC). Portal vein flow rates were measured as a function of portal vein pressure setting (3, 5, or 8 mm Hg) and inflow oxygen concentration (95% O₂ vs 6% O₂). As expected, portal flow increased with increasing set pressure, but there were no significant differences in portal flow between NMP-acellular and NMP-RBC groups. Portal flow was unchanged by altering inflow oxygen concentration. All data are presented as the mean ± SEM. MP, machine perfusion; NMP, normothermic machine perfusion; PVP, portal vein pressure; RBC, red blood cells; SEM, standard error of the mean.