• Anesthesiology · Apr 1975

    MAC expanded: AD50 and AD95 values of common inhalation anesthetics in man.

    • R H de Jong and E I Eger.
    • Anesthesiology. 1975 Apr 1; 42 (4): 384-9.

    AbstractTwo important measures may be derived from patient responses to a range of anesthetic doses. The AD50, corresponding to MAC, estimates the median anesthetic concentration--that dose where half the patients are anesthetized and half are not. The AD95 approaches the theoretical "minimum" anesthetic concentration by estimating the dose that anesthetizes 95 per cent of a patient population. The AD50 and AD95 are logical extensions of the MAC concept and can be evaluated with current experimental methodology. Recomputed from available data , the AD50's of nine inhaled anesthetics proved to be numerically identical to their MAC values. The AD95's of nine inhaled anesthetics proved to be numerically identical to their MAC values. The AD95's were 5 to 40 per cent greater than the AD50's.)Key workd: Potency, anesthetic, MAC, AD50, AD95; Pharmacology, dose-response curves.)

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