1. Esophageal pressure, airway pressure, and transpulmonary pressure (PL) with PEEP set at 26 cm H2O (same patient as Fig. 24).
Esophageal pressure, airway pressure, and transpulmonary pressure (PL) with PEEP set at 26 cm H2O (same patient as Fig. 24). A: During expiratory pause. B: During inspiratory pause. C: as shown in the cartoon, the PEEP counterbalancs the Pes (pleural pressure [Ppl]). Note that the same pressure is exerted on the heart and central circulation at the end of exhalation. At the mid-thoracic level (position of the esophageal balloon), the end-inspiratory PL is 10 cm H2O, which is likely safe, despite a plateau pressure (Pplat) of 40 cm H2O. Note that blood pressure (BP) is not affected because there is no increase in Ppl with the addition of PEEP. PIP = peak inspiratory pressure; Ppl = pleural pressure; BP = blood pressure.
Dean R Hess Respir Care 2014;59:
(c) 2012 by Daedalus Enterprises, Inc.