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Fig. 3 | Critical Care

Fig. 3

From: Do spontaneous and mechanical breathing have similar effects on average transpulmonary and alveolar pressure? A clinical crossover study

Fig. 3

The swings of esophageal pressure (ΔPes) from baseline (a), shown as mean and standard deviation, were positive during controlled mechanical ventilation (CMV) but became negative during pressure support ventilation and progressively lower for decreasing levels of support (high, medium, and low). This was the case when we considered both the mean values during inspiration (closed bars) and at the moment of maximum transpulmonary pressure (open bars). Similarly, alveolar pressure (Palv) (b), shown as bars and standard deviation, progressively decreased from CMV through the different levels of pressure support ventilation (high, medium, and low). Moreover, Palv was, on average, lower than the set positive end-expiratory pressure (PEEP) (dashed line), both as a mean during inspiration (closed bars) and at the moment of maximum transpulmonary pressure (open bars), if a low level of support was applied

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Critical Care

ISSN: 1364-8535