Figure 6

Volumetric capnography data. Volumetric phase 3 slope (SIII), ventilation dead space fractions relative to the tidal volume according to Fowler (VDf), Bohr (VDb), and Enghoff (VDe) for intubated patients in supine and prone positions. Partial pressure of oxygen in the arterial blood (PaO2), fraction of inspired oxygen (FiO2), partial pressure of carbon dioxide in the arterial blood (PaO2), arterial oxygen saturation (SaO2), central venous saturation (ScvO2), intrapulmonary shunt fraction (Qs/Qt). Empty boxes indicate data acquired in prone position; boxes with diagonal line pattern indicate data acquired in supine position. *: p < 0.05 versus supine position.