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The changes (mean ± SD) in systemic O2transport including SVR, total pulmonary vascular resistance (tPVR), Qp, Qs, VO2, DO2, ERO2, lactate saturation, ScO2, SsO2and plasma epinephrine and norepinephrine concentration during the stepwise increases in PaCO2from 40 to 50 to 60 mmHg, and after termination of the additional inspired CO2at PaCO240 mmHg.
