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Related Experiment Videos

Oxidation-reduction maintenance in organ preservation.

M Jellinek, M Castaneda, P J Garvin

    Archives of Surgery (Chicago, Ill. : 1960)
    |April 1, 1985
    PubMed
    Summary

    Maintaining optimal oxidation-reduction potential is crucial for protecting isolated perfused organs from oxygen toxicity and ischemia damage. This study demonstrates that specific redox potentials can reverse warm ischemia injury and extend organ preservation times.

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    Area of Science:

    • Biomedical Engineering
    • Organ Perfusion Technology
    • Biochemistry

    Background:

    • Isolated perfused organs are susceptible to oxygen toxicity, especially under hypothermia, due to reduced protective enzyme activity.
    • Protecting organs requires adding reducing agents to the perfusate to counteract oxidative stress.

    Purpose of the Study:

    • To develop a method for quantifying and controlling the oxidation-reduction potential of perfusate in isolated organ systems.
    • To investigate the effect of optimal oxidation-reduction potential on reversing warm ischemia damage and extending ex vivo organ preservation.

    Main Methods:

    • Designed and utilized an electrochemical device to measure and control the oxidation-reduction potential of the perfusate.
    • Kidneys were perfused with cryoprecipitated plasma, with ascorbic acid and glutathione added to adjust redox potential.

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  • A battery-powered potentiostat drove the electrochemical cell integrated into the perfusion circuit.

    • Main Results:

    • Kidneys subjected to 60 minutes of warm ischemia showed optimal survival at an oxidation-reduction potential of -20 mV.
    • Organs preserved for six days without redox support had no survivors.
    • Optimal oxidation-reduction support, maintained at or near -17 mV, enabled long-term organ survival.

    Conclusions:

    • An optimal oxidation-reduction potential is essential for reversing damage caused by warm ischemia in isolated perfused organs.
    • Maintaining a specific redox balance significantly prolongs the viability of organs during ex vivo preservation.
    • Electrochemical control of perfusate redox state offers a promising strategy for enhancing organ preservation outcomes.