Figure 253

The rate of rise in alveolar tension of several anesthetic agents.

anesthesia, that is, after patients become unconscious. As body tissues become saturated with anesthetic molecules, blood returning to the lung will have increasingly high anesthetic tension, and the alveolar-arterial tension gradient will be reduced. Since the gradient controls the rate of diffusion across the alveolar capillary membrane, uptake is also reduced and the rate of rise of the alveolar tension of anesthetic is accelerated.

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