Figure 8-20 Anesthetic degradation to carbon monoxide at equi-minimum alveolar concentrations (1.5 MAC) concentrations by (A) barium hydroxide lime and (B) soda lime. Each data point is the mean ± SD (n = 3). The single data point at 300 minutes reflects undetectable carbon monoxide from sevoflurane, methoxyflurane, or halothane. (Adapted from Baxter PJ, Garton K, Kharasch ED: Mechanistic aspects of carbon monoxide formation from volatile anesthetics. Anesthesiology 89:929–941, 1998.)