PMC9021689_01
Changes in expired gas parameters and blood lactate over time. The trends of gas exchange measurements and blood lactate are presented. Ten minutes after the first PExT, both VO2 and VCO2 suddenly dropped, while RQ began to rise steeply before a rise in the level of blood lactate level up to 2.2 mmol/L a few hours after the RQ elevation. All of these parameters plateaued over the next 4 h, and then returned to the initial level. PExT, partial exchange transfusion; RQ, respiratory quotient; VCO2, carbon dioxide production; VO2, oxygen uptake.
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F1
During the transient anaerobic metabolism associated with PExT, RQ showed a very fast response compared to the change in blood lactate (Figure 1).