Figure 6-14 The effect of surgical stimulation on the ventilatory depression of inhaled anesthesia with isoflurane in the presence and absence of nitrous oxide. Surgical stimulation increased alveolar ventilation and decreased PaCO2 at all depths of anesthesia examined. (Adapted Eger EI, Dolan WM, Stevens WC, et al: Surgical stimulation antagonizes the respiratory depression produced by Forane. Anesthesiology 36:544, 1972.)


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