Fig. 2.
The ratio of CO2 production divided by O2 consumption, also known as the respiratory quotient, does not change significantly from baseline (black) with exposure to hydrogen sulfide at 80 ppm (green), 0.5% isoflurane (purple), 0.5% halothane (red), or 1.0% sevoflurane (yellow). This indicates equivalent changes occur in both CO2 production and O2 consumption during inhaled gas exposures.