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Acid-base changes after cardiorespiratory arrest in the dog

P V Greenwood, R E Rossall, C T Kappagoda

    Clinical Science (London, England : 1979)
    |February 1, 1980
    PubMed
    Summary

    Cardiorespiratory arrest causes minor non-respiratory acid-base disturbances in dogs. Even with prolonged circulatory arrest, the acid-base changes were not significant, indicating resilience.

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    Area of Science:

    • Physiology
    • Cardiovascular Research
    • Acid-Base Balance

    Background:

    • Cardiorespiratory arrest leads to complex physiological changes.
    • Understanding acid-base disturbances is crucial for managing critical care patients.

    Purpose of the Study:

    • To investigate the non-respiratory acid-base disturbances following cardiorespiratory arrest.
    • To quantify the impact of circulatory arrest duration on acid-base balance.

    Main Methods:

    • Experiments were conducted on anesthetized dogs.
    • Circulatory arrest was induced via ventricular fibrillation or great vein occlusion.
    • Non-respiratory pH changes were measured during varying arrest periods.

    Main Results:

    • Short-term arrest (2.0-3.5 min) resulted in small reductions in non-respiratory pH.
    • Mean pH reduction was 0.04 units after vein occlusion and 0.024 units after fibrillation.
    • Longer arrest periods (3.0-11.0 min) showed a correlation between duration and acidaemia, but changes were not substantial.

    Conclusions:

    • Non-respiratory acid-base disturbances from cardiorespiratory arrest are generally minor in dogs.
    • The magnitude of these acid-base changes does not increase dramatically with arrest duration within the studied range.

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