Liver transplantation without graft ischemia in humans

BACKGROUNDIschemia-reperfusion injury is considered an inevitable event that compromises posttransplant outcomes. Numerous treatments have been proposed to reduce its impact. However, most of them have had limited success, as none of them can completely avoid graft ischemia. METHODSIschemia-free liver transplantation (IFLT) comprises surgical techniques to enable continuous oxygenated blood supply to brain-dead donor livers during procurement, preservation and implantation using normothermic machine perfusion technology. In this nonrandomized study, 38 donor livers were transplanted using IFLT and were compared to 130 livers procured and transplanted using a conventional procedure (CLT). RESULTSOne patient (2.6%) suffered early allograft dysfunction in the IFLT group, compared with 43.8% of patients in the CLT group (absolute risk difference, 41.2 percentage points; 95% confidence interval, -31.3, -51.1). The median (range) peak aspartate aminotransferase levels within the first week (336, 149-4112 vs. 1445, 149-25083 U/L, P<0.001), and the median (range) total bilirubin levels on day 7 (2.11, 0.68-12.47 vs. 5.11, 0.56-51.97 mg/dL, P<0.001) posttransplantation were much lower in the IFLT than in the CLT group. The IFLT recipients had less need for renal replacement therapy (2.6% vs. 16.9%, P=0.02), shorter median (range) intensive care unit stay (34, 12-235 vs. 43.5, 7-936 hours, P=0.003), and higher one-year recipient survival (97.4% vs. 84.6%, P=0.02) and graft survival (94.7% vs. 83.8%, P=0.04) rates than the CLT recipients. The extended criteria donor livers in IFLT yielded faster posttransplant recovery than the standard criteria donor livers in CLT. CONCLUSIONSIFLT provides a new approach to minimize ischemia-reperfusion injury and improve post-transplant outcomes. Clinical trial registryThis trial is registered with http://www.chictr.org.cn, number ChiCTR-OPN-17012090.