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Fig. 4 | Annals of Intensive Care

Fig. 4

From: Physiological effects of high-intensity versus low-intensity noninvasive positive pressure ventilation in patients with acute exacerbation of chronic obstructive pulmonary disease: a randomised controlled trial

Fig. 4

a ΔPes, b PTPes/breath, c PTPes/min, and d PTPes/L within 24 h after randomisation. Values are individuals, means, and standard errors. ΔPes inspiratory oesophageal pressure swing, NPPV noninvasive positive pressure ventilation, PTPes oesophageal pressure–time product

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