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Halothane anesthesia in calves.

E P Steffey, D Howland

    American Journal of Veterinary Research
    |March 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    This study determined halothane potency in young calves, finding lower concentrations effective compared to human predictions. Anesthesia caused minimal biochemical changes, suggesting limited organ impact in calves.

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    Area of Science:

    • Veterinary Anesthesiology
    • Comparative Medicine

    Background:

    • Calves are common research animals.
    • Calves exhibit sensitivity to anesthetics.

    Purpose of the Study:

    • Determine halothane potency in young Holstein-Friesian calves.
    • Evaluate the effect of nitrous oxide on halothane MAC.
    • Assess cardiopulmonary and biochemical effects of halothane anesthesia.

    Main Methods:

    • Studied eight young, healthy male Holstein-Friesian calves.
    • Measured minimal alveolar halothane-O2 concentration (MAC) preventing movement to tail clamp.
    • Assessed halothane MAC with 50% nitrous oxide (N2O) addition.
    • Monitored cardiopulmonary function and 17 blood biochemical values.

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    Main Results:

    • Halothane MAC in calves was 0.76 +/- 0.03 vol%, lower than predicted from human studies.
    • Adding 50% N2O reduced halothane MAC to 0.59 +/- 0.03%.
    • Cardiopulmonary depression occurred proportionally to anesthetic dose.
    • Only total protein and albumin were significantly altered (P < 0.05) within seven days.

    Conclusions:

    • Halothane is potent in young calves, requiring lower MAC than predicted.
    • Nitrous oxide reduces required halothane concentration.
    • Halothane anesthesia at these doses causes minimal organ system insult in calves.