title: Normothermic Machine Perfusion of Deceased Donor Liver Grafts Is Associated With Improved Postreperfusion Hemodynamics.
abstract: BACKGROUND
  Graft reperfusion poses a critical challenge during liver transplantation and can be associated with hemodynamic instability/postreperfusion syndrome. This is sequel to ischemia-reperfusion injury and normothermic machine preservation (NMP) may affect hemodynamic changes. Herein, we characterize postreperfusion hemodynamics in liver grafts after NMP and traditional cold preservation.
  
  
  METHODS
  Intraoperative records of patients receiving grafts after NMP (n = 6; NMP group) and cold storage (CS) (n = 12; CS group) were compared. The mean arterial pressure (MAP) was defined as the average pressure in the radial artery during 1 cardiac cycle by invasive monitoring. Postreperfusion syndrome was defined as MAP drop greater than 30% of baseline, lasting for 1 minute or longer within the first 5 minutes from graft reperfusion.
  
  
  RESULTS
  Donor, recipient, demographics, and surgical parameters were evenly matched. Normothermic machine preservation grafts were perfused for 525 minutes (395-605 minutes) after initial cold ischemic time of 91 minutes (73-117 minutes), whereas in CS group cold ischemic time was 456 minutes (347-685 minutes) (P= 0.001). None developed postreperfusion syndrome in the NMP group against n = 2 (16.7%) in CS group (P= 0.529). Normothermic machine preservation group had better intraoperative MAP at 90 minutes postreperfusion (P= 0.029), achieved with a significantly less vasopressor requirement (P= <0.05) and less transfusion of blood products (P= 0.030) compared with CS group.
  
  
  CONCLUSIONS
  Normothermic machine perfusion is associated with a stable intraoperative hemodynamic profile postreperfusion, requiring significantly less vasopressor infusions and blood product transfusion after graft reperfusion and may have benefit to alleviate ischemia-reperfusion injury in liver transplantation.
authors: The Liver Unit, Queen Elizabeth Hospital Birmingham, Birmingham, United Kingdom.
authors: Roberta
authors: R
authors: Angelico
authors: The Liver Unit, Queen Elizabeth Hospital Birmingham, Birmingham, United Kingdom.
authors: M Thamara P R
authors: MT
authors: Perera
authors: Nuffield Department of Surgery, University of Oxford, Oxford, United Kingdom.
authors: Reena
authors: R
authors: Ravikumar
authors: Nuffield Department of Surgery, University of Oxford, Oxford, United Kingdom.
authors: David
authors: D
authors: Holroyd
authors: Nuffield Department of Surgery, University of Oxford, Oxford, United Kingdom.
authors: Constantin
authors: C
authors: Coussios
authors: The Liver Unit, Queen Elizabeth Hospital Birmingham, Birmingham, United Kingdom.
authors: Hynek
authors: H
authors: Mergental
authors: The Liver Unit, Queen Elizabeth Hospital Birmingham, Birmingham, United Kingdom.
authors: John R
authors: JR
authors: Isaac
authors: Department of Liver Anaesthesia, Queen Elizabeth Hospital Birmingham, Birmingham, United Kingdom.
authors: Asim
authors: A
authors: Iqbal
authors: Department of Liver Anaesthesia, Queen Elizabeth Hospital Birmingham, Birmingham, United Kingdom.
authors: Hentie
authors: H
authors: Cilliers
authors: The Liver Unit, Queen Elizabeth Hospital Birmingham, Birmingham, United Kingdom.
authors: Paolo
authors: P
authors: Muiesan
authors: Nuffield Department of Surgery, University of Oxford, Oxford, United Kingdom.
authors: Peter J
authors: PJ
authors: Friend
authors: The Liver Unit, Queen Elizabeth Hospital Birmingham, Birmingham, United Kingdom.
authors: Darius F
authors: DF
authors: Mirza