• Anaesth Intensive Care · Jun 2002

    Case Reports

    Prolonged paralysis following mivacurium administration.

    • D Y Chung and J Hardman.
    • Department of Perioperative Medicine and Intensive Care, Royal Brisbane Hospital, Queensland.
    • Anaesth Intensive Care. 2002 Jun 1; 30 (3): 360-3.

    AbstractMivacurium is a benzylisoquinolone, choline-like, non-depolarizing muscle relaxant. Its onset of action is similar to that of atracurium but its duration of action is shorter (approximately 10-15 minutes). Mivacurium is metabolized by plasma cholinesterases at approximately 70% of the rate of metabolism of suxamethonium. Deficiency or abnormality of plasma cholinesterase may cause the duration of action of both suxamethonium and mivacurium to be greatly prolonged. We describe a case of prolonged mivacurium paralysis after day surgery. Laboratory investigations showed a genetic tendency toward abnormal cholinesterase levels, but markedly depressed cholinesterase activity was suggestive of additional acquired causes. This patient had a history of liver disease, malnutrition and anticholinesterase use, which we believe were the most significant factors involved.

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