Diagram illustration correct (a) and incorrect (b) prone positioning in a patient treated for traumatic brain injury complicated with moderate-to-severe acute respiratory distress syndrome (ARDS). Correct positioning with abdominal suspension, so that the abdomen can hang free will not increase IAP during PP. An incorrect positioning on the contrary will increase IAP by a back pressure resulting from compression of the abdomen by the bed and faulty suspension. IAP intra-abdominal pressure, ACP abdominal compression pressure, PEEP positive end-respiratory pressure
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