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Figure 4 | Critical Care

Figure 4

From: PaCO2 and alveolar dead space are more relevant than PaO2/FiO2 ratio in monitoring the respiratory response to prone position in ARDS patients: a physiological study

Figure 4

Comparison between measured VD physiol /V T and estimated VD physiol /V T [14]using a Bland and Altman representation (left) and a linear correlation (right). (A) and (B) Comparison for each paired data set (n = 78) in the supine position and after 3, 6, 9, 12 and 15 hours in the prone position. (C) and (D) Comparison of changes in VDphysiol/VT assessed according to the two methods between each time of measurement and the previous one. VDphysiol/VT: ratio of physiological dead space to tidal volume.

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