Fig. 4.
Extracorporeal carbon dioxide removal per liter of sweep gas flow as a function of carbon dioxide tension in blood entering the membrane lung. Individual data (up to three recordings per patient, excluding those obtained when the sweep gas flow was 0 l/min) were considered as independent and are shown as dots. According to linear regression analysis, y = −6.902 + 0.875 × (n = 58; R2 = 0.479, P < 0.001). Carbon dioxide tension in blood entering the membrane lung (Pco2 pre-ML) is also expressed as mean ± SD for each diagnostic category, on top of the figure (the P value refers to one-way ANOVA). ARDS = acute respiratory distress syndrome; BRIDGE = bridge to lung transplant; COPD = chronic obstructive pulmonary disease.