• Anaesth Intensive Care · Aug 2004

    Safe duration of postoperative monitoring for malignant hyperthermia susceptible patients.

    • N Pollock, E Langtont, K Stowell, C Simpson, and N McDonnell.
    • Department of Anaesthesia & Intensive Care, Palmerston North Hospital, Palmerston North, New Zealand.
    • Anaesth Intensive Care. 2004 Aug 1; 32 (4): 502-9.

    AbstractPostoperative management of malignant hyperthermia (MH) susceptible patients has changed substantially over the last 20 years, with many patients now managed as day cases. Our previous policy was to monitor known MH susceptible patients (and relatives of known MH susceptible individuals not yet investigated by muscle biopsy) for four hours in the Post Anaesthetic Care Unit. However, anaesthetic literature reports suggest that MH reactions usually commence within one hour of anaesthesia. For this reason we conducted a retrospective review of Post Anaesthetic Care Unit data in 254 MH susceptible/related patients treated between 1991 and late 2000. On the basis of this review we instituted a policy change and reduced our monitoring time to one hour in the Post Anaesthetic Care Unit with a further 1.5h in a step-down unit if indicated. A prospective study in a further 68 MH susceptible/related patients showed that no MH reactions were missed due to the shorter monitoring period.

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