Fig. 1. Inspired carbon monoxide (CO) concentrations resulting from degradation of desflurane and isoflurane by partially dehydrated absorbents. Note the difference in scale for CO concentrations. There were 4–7 animals per group (exact numbers are provided in the Methods). Peak CO concentrations from desflurane were significantly (P < 0.05) less for Amsorb^®versus  Baralyme^®, and for Amsorb^®versus  all absorbents for isoflurane.