Factors rerlated to hypercarbia: y = - 0.0533x + 6.0325 R = 0.14 25 35 45 M v (L / m in) EtCO2 (mmHg) Figure 3.24: Correlation between pulmonary ventilation and EtCO2 of group N0.5 (n = 3, r=-0.383, p=0.019) Comments: Pulmonary ventilation and EtCO2 have a moderate and inversed correlation.