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Machine perfusion and the prevention of ischemic type biliary lesions following liver transplant:What is the evidence?

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World Journal of Gastroenterology 2023年第20期29卷 3066-3083页

作者： Manuel Durán Rafael Calleja Angus Hann George Clarke Ruben Ciria Anisa Nutu Rebeca Sanabria-Mateos María Dolores Ayllón Pedro López-Cillero Hynek Mergental Javier Briceño M Thamara P R Perera Department of Liver Transplantation Reina Sofía University HospitalCórdoba 14004Spain The Liver Unit Queen Elizabeth Hospital BirminghamBirmingham B152THUnited Kingdom Centre for Liver and Gastrointestinal Research Institute of Immunology and ImmunotherapyUniversity of BirminghamBirmingham B152THUnited Kingdom

The widespread uptake of different machine perfusion(MP)strategies for liver transplant has been driven by an effort to minimize graft injury.Damage to the cholangiocytes during the liver donation,preservation,or early posttransplant period may result in stricturing of the biliary tree and inadequate biliary drainage.This problem continues to trouble clinicians,and may have catastrophic consequences for the graft and patient.Ischemic injury,as a result of compromised hepatic artery flow,is a well-known cause of biliary strictures,sepsis,and graft failure.However,very similar lesions can appear with a patent hepatic artery and these are known as ischemic type biliary lesions(ITBL)that are attributed to microcirculatory dysfunction rather than main hepatic arterial compromise.Both the warm and cold ischemic period duration appear to influence the onset of ITBL.All of the commonly used MP techniques deliver oxygen to the graft cells,and therefore may minimize the cholangiocyte injury and subsequently reduce the incidence of ITBL.As clinical experience and published evidence grows for these modalities,the impact they have on ITBL rates is important to consider.In this review,the evidence for the three commonly used MP strategies(abdominal normothermic regional perfusion[A-NRP],hypothermic oxygenated perfusion[HOPE],and normothermic machine perfusion[NMP])for ITBL prevention has been critically reviewed.Inconsistencies with ITBL definitions used in trials,coupled with variations in techniques of MP,make interpretation challenging.Overall,the evidence suggests that both HOPE and A-NRP prevent ITBL in donated after circulatory death grafts compared to cold storage.The evidence for ITBL prevention in donor after brain death grafts with any MP technique is weak.

关键词： Liver transplant Ischemic type biliary lesions Hypothermic oxygenated machine perfusion normothermic machine perfusion abdominal normothermic regional perfusion Donation after circulatory death

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