Determination of an adequate perfusion pressure for continuous dual vessel hypothermic machine perfusion of the rat liver

Nils A. 't Hart*, Arjan van der Plaats, Henri G.D. Leuvenink, Harry van Goor, Janneke Wiersema-Buist, Gijsbertus J. Verkerke, Gerhard Rakhorst, Rutger J. Ploeg

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Hypothermic machine perfusion (HMP) provides better protection against ischemic damage of the kidney compared to cold-storage. The required perfusion pressures needed for optimal HMP of the liver are, however, unknown. Rat livers were preserved in University of Wisconsin organ preservation solution enriched with acridine orange (AO) to stain viable cells and propidium iodide (PI) to detect dead cells. Perfusion pressures of 12.5%, 25% or 50% of physiologic perfusion pressures were compared. Intravital fluorescence microscopy was used to assess liver perfusion by measuring the percentage of AO staining. After 1-h, the perfusion pressure of 12.5% revealed 72% ± 3% perfusion of mainly the acinary zones one and two. The perfusion pressure of 25% and 50% showed complete perfusion. Furthermore, 12.5% showed 14.7 ± 3.6, 25% showed 3.7 ± 0.9, and 50% showed 11.2 ± 1.4 PI positive cells. One hour was followed by another series of experiments comprising 24-h preservation. In comparison with 24-h cold-storage, HMP at 25% showed less PI positive cells and HMP at 50% showed more PI positive cells. In summary, perfusion at 25% showed complete perfusion, demonstrated by AO staining, with minimal cellular injury, shown with PI. This study indicates that fine-tuning of the perfusion pressure is crucial to balance (in)complete perfusion and endothelial injury.

Original languageEnglish
Pages (from-to)343-352
Number of pages10
JournalTransplant international
Issue number4
Publication statusPublished - 1 Apr 2007
Externally publishedYes


  • Ischemia-reperfusion
  • Machine preservation
  • Perfusion
  • University of Wisconsin solution

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