Log-log plot of carbon monoxide uptake by humans from very low ambient CO concentrations as computed from the Coburn-Forster-Kane equation. Abbreviations: Pco2 = mean partial pressure of O2 in lung capillaries, VA = alveolar ventilation rate, Vb = blood volume, M = equilibrium constant, DL = diffusing capacity of lungs, [COHb]0 = value prior to CO exposure, Vco = rate of endogenous CO production. (From: Peterson, J.E. & Stewart, R.D., 1975, Predicting the carboxyhemoglobin levels resulting from carbon monoxide exposures. J. Appl. Physiol., 39, 633-638).
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