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Related Experiment Videos

Blood substitution: an experimental study.

A M Elrifai1, J E Bailes, M L Leavitt

  • 1Allegheny-Singer Research Institute, Pittsburgh, PA 15212.

The Journal of Extra-Corporeal Technology
|December 10, 1991
PubMed
Summary
This summary is machine-generated.

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This study shows a 100% survival rate in dogs using an aqueous blood substitute during hypothermic cardiopulmonary bypass. This blood substitute shows promise for reducing transfusion needs and risks in major surgeries.

Area of Science:

  • Cardiovascular Surgery
  • Biomedical Engineering
  • Anesthesiology

Background:

  • Cardiopulmonary bypass (CPB) often requires extensive blood product transfusions, leading to hemodilution and transfusion risks.
  • Blood substitutes offer potential to reduce reliance on allogeneic blood, mitigating disease transmission and complications from prolonged extracorporeal circulation.

Purpose of the Study:

  • To evaluate the efficacy and safety of an aqueous blood substitute in a canine model during hypothermic CPB.
  • To assess the feasibility of using blood substitutes to minimize blood product transfusions in major cardiovascular and neurosurgical procedures.

Main Methods:

  • A hypothermic technique was employed in 15 dogs, utilizing an aqueous blood substitute to replace exsanguinated volume, achieving a hematocrit below 1%.

Related Experiment Videos

  • Animals underwent 3 hours of cardiac arrest at core temperatures below 10°C with continuous extracorporeal perfusion, followed by rewarming and autotransfusion.

    • Main Results:

    • Maximal survival rates (100%) were achieved with the first-generation blood substitute under specific hypothermic and cardiac arrest conditions (2.5 hours at <10°C, 3 hours cardiac arrest).
    • Successful rewarming, heart initiation, and spontaneous respiration resumption were observed post-autotransfusion.

    Conclusions:

    • The tested aqueous blood substitute demonstrated high efficacy in supporting canine subjects through prolonged hypothermic cardiopulmonary bypass.
    • Further research into advanced blood substitutes is ongoing, aiming for applications in universal hypothermic preservation and in situ organ preservation.