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Fig. 9 | Respiratory Research

Fig. 9

From: Homogenizing effect of PEEP on tidal volume distribution during neurally adjusted ventilatory assist: study of an animal model of acute respiratory distress syndrome

Fig. 9

Difference between dependent and non-dependent tidal volume distribution. In the lower panel, the tidal volume distribution in the dependent and non-dependent region in percentage of total tidal volume is presented in relation to PEEP level. During the increase of PEEP the dependent portion of tidal volume distribution is increased. After PEEP 9 cmH2O is reached the line crosses, indicating that the dependent tidal volume distribution surpasses the non-dependent distribution. During the decremental PEEP phase the lines crosses prior to PEEP 9 cmH2O, indicating that after this PEEP level the distribution is returned to predominantly non-dependent. Standard deviation is presented as error bars. The balance between non-dependent and dependent distribution is further demonstrated in the upper panel where the difference of percentage points between non-dependent and dependent distribution is shown. When values are less than 0% the distribution is predominantly non-dependent. When values are close to 0%, indicated by the red line, the distribution is considered homogenous. When values exceed 0% the distribution is predominantly dependent

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