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Related Experiment Videos

Hepatic gluconeogenesis during halothane anaesthesia in man

M Andreen, R Brandt, T Strandell

    Acta Anaesthesiologica Scandinavica
    |December 1, 1981
    PubMed
    Summary

    Halothane anesthesia inhibits hepatic gluconeogenesis, the process of glucose production from amino acids in the liver. This study confirms this effect in human volunteers, showing reduced glucose release during anesthesia.

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    Area of Science:

    • Biochemistry
    • Anesthesiology
    • Human Physiology

    Background:

    • Hepatic gluconeogenesis from lactate and amino acids is known to be inhibited by halothane in vitro.
    • Previous studies focused on isolated liver models, necessitating in vivo investigation.

    Purpose of the Study:

    • To investigate the effect of halothane anesthesia on hepatic gluconeogenesis in human volunteers.
    • To compare gluconeogenesis rates during amino acid infusion with and without halothane.

    Main Methods:

    • Three volunteers received a constant amino acid infusion during halothane anesthesia.
    • Three control subjects received the same infusion without halothane.
    • Subjects were pre-conditioned with a carbohydrate-poor diet to deplete glycogen stores.
    • Measurements included total hepatic blood flow (THBF), splanchnic oxygen consumption, blood glucose and urea levels, and splanchnic glucose and urea release.

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    Main Results:

    • Halothane anesthesia reduced total hepatic blood flow (THBF) and slightly decreased oxygen consumption, increasing splanchnic oxygen extraction.
    • Despite amino acid infusion, splanchnic glucose release was reduced to near control levels during halothane anesthesia.
    • Blood glucose and urea levels remained comparable between anesthetized and control groups.
    • Urea release was only slightly reduced, suggesting other amino acid metabolic pathways were largely unaffected.

    Conclusions:

    • Halothane anesthesia inhibits the stimulating effect of amino acid infusion on hepatic gluconeogenesis in humans.
    • Amino acid metabolism, excluding gluconeogenesis, appears to proceed with minimal changes under halothane anesthesia.