Abstract
Donation after circulatory death (DCD) is driving the increase in deceased organ donors in the United States. Normothermic regional perfusion (NRP) and ex-situ machine perfusion (es-MP) have been instrumental in improving liver transplant outcomes and graft utilization. This study examines the current landscape of liver utilization from cardiac DCD donors in the US. Using the UNOS STAR file, all adult (≥ 18 years old) DCD donors in the US in which the heart was used for transplantation from October 1, 2020, to September 30, 2023, were compared using procurement technique (NRP versus super rapid recovery [SRR]) and storage strategy (es-MP versus static cold storage [SCS]). 188 livers were transplanted from 309 TA-NRP donors (61% utilization) versus 305 (56%) liver transplants from 544 SRR donors. Es-MP was used in 20% (n= 38) of NRP cases versus 32% (98) of SRR cases. 281 (59%) of liver grafts were exposed to NRP, es-MP, or both. While there is widespread utilization of machine perfusion, more research is needed to determine optimal graft management strategies, particularly concerning the use of multiple technologies in complementary ways. More complete data collection is necessary at a national level to address these important research questions.
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