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A pharmacodynamic model for pancuronium

C J Hull, H B Van Beem, K McLeod

    British Journal of Anaesthesia
    |November 1, 1978
    PubMed
    Summary
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    A revised kinetic model accurately predicts pancuronium

    Area of Science:

    • Pharmacokinetics and pharmacodynamics
    • Neuromuscular blockade
    • Renal failure

    Background:

    • A simple two-compartment model inadequately describes pancuronium's effects on muscle response.
    • Pancuronium's plasma concentration changes do not fully correlate with muscle twitch response.
    • Existing models fail to reconcile plasma levels with clinical effects.

    Purpose of the Study:

    • To develop an improved kinetic model for pancuronium.
    • To reconcile plasma concentration data with muscle twitch response.
    • To evaluate pancuronium's pharmacokinetics in patients with renal failure.

    Main Methods:

    • Developed a three-compartment model including a biophase (receptor) compartment.
    • Applied the complete model to analyze pancuronium's effects.

    Related Experiment Videos

  • Simulated drug behavior in patients with total renal failure.

    • Main Results:

    • The three-compartment model successfully reconciled pancuronium's plasma concentration with muscle twitch response.
    • Model predictions align with animal study characteristics.
    • Patients with renal failure show marginal resistance to low pancuronium doses.
    • Higher pancuronium doses lead to prolonged recovery in renal failure patients.

    Conclusions:

    • A three-compartment model with a biophase compartment is superior for describing pancuronium pharmacokinetics and pharmacodynamics.
    • Renal failure alters pancuronium's dose-response relationship, particularly affecting recovery time.
    • The model provides insights into managing pancuronium in patients with impaired renal function.