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Related Experiment Video

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Porcine Liver Transplantation Without Veno-Venous Bypass As an Extended Criteria Donor Model
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Cross-Circulation for Extracorporeal Liver Support in a Swine Model.

Wei Kelly Wu1,2, Andrew Tumen1, John W Stokes1

  • 1From the Department of Thoracic Surgery, Vanderbilt University Medical Center, Nashville, Tennessee.

ASAIO Journal (American Society for Artificial Internal Organs : 1992)
|August 5, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel veno-arterial-venous (V-AV) cross-circulation (XC) technique to support extracorporeal livers in swine. This method shows promise for improving donor organ salvage and developing new liver therapeutics.

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Area of Science:

  • Transplantation Biology
  • Surgical Innovation
  • Organ Support Systems

Background:

  • Persistent organ shortages and high waitlist mortality in liver transplantation necessitate improved organ salvage strategies.
  • Extracorporeal organ support platforms offer potential for novel therapeutic development and evaluation.
  • Current organ preservation methods require enhancement to address unmet clinical needs.

Purpose of the Study:

  • To evaluate the feasibility and efficacy of a novel veno-arterial-venous (V-AV) cross-circulation (XC) technique for supporting extracorporeal livers.
  • To assess the functional, biochemical, and morphological status of livers and host animals during normothermic extracorporeal support.
  • To explore the potential of V-AV XC as a translational research platform for liver therapeutics and donor organ salvage.

Main Methods:

  • Implementation of a V-AV cross-circulation model using a swine host to provide normothermic support to explanted livers.
  • Conducting functional, biochemical, and morphological analyses of extracorporeal livers and swine hosts over a 12-hour support period.
  • Monitoring hemodynamic stability in swine hosts and assessing liver function markers, including bile production, lactate clearance, and oxygen consumption.

Main Results:

  • Extracorporeal livers demonstrated sustained synthetic function via alkaline bile production and metabolic activity through lactate clearance and oxygen consumption.
  • No biochemical evidence of hepatocellular injury was observed in the extracorporeal livers post-reperfusion.
  • Histopathologic analysis revealed improvements in sinusoidal dilatation and composite acute injury scores after 12 hours of support.
  • Swine hosts maintained hemodynamic stability throughout the V-AV XC procedure.

Conclusions:

  • The novel V-AV cross-circulation technique is feasible for providing normothermic support to extracorporeal livers in a swine model.
  • This approach shows potential as a translational research platform for evaluating liver therapeutics and improving donor organ salvage.
  • V-AV XC represents a promising clinical biotechnology for addressing challenges in liver transplantation.