Esophageal pressure measurements in a patient with auto–positive end-expiratory pressure (auto-PEEP). Note that an esophageal pressure decrease of approximately.

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Esophageal pressure measurements in a patient with auto–positive end-expiratory pressure (auto-PEEP). Note that an esophageal pressure decrease of approximately 10 cm H2O is necessary to trigger the ventilator. This represents an auto-PEEP level of approximately 10 cm H2O. Also note an inspiratory effort that is not great enough to overcome auto-PEEP and trigger the ventilator. Expiratory pressure does not return to zero before the subsequent breath is initiated. Paw, airway pressure; Pes, esophageal pressure. Source: Monitoring the Anesthesia Patient, Anesthesiology, 3e Citation: Longnecker DE, Mackey SC, Newman MF, Sandberg WS, Zapol WM. Anesthesiology, 3e; 2017 Available at: http://accessanesthesiology.mhmedical.com/DownloadImage.aspx?image=/data/books/2152/longnecker3_ch28_f020.png&sec=164221170&BookID=2152&ChapterSecID=164142693&imagename= Accessed: October 08, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved