Abstract
Objective: To report the modification of the pressure-volume curve of the respiratory system (P.Vst,rs curve) observed after ascitic drainage in a patient with ARDS. Design, methods: P.Vst,rs curves were acquired 1 hour before and after the draining of ascites, using a classic airway occlusion method. Setting: General intensive care unit (ICU). Results: The upper inflection point, the slope of the curve, the lower inflection point, measured on the P.Vsr,rs curve before ascites evacuation, were greatly modified after removal of 2500 ml of fluid. Conclusion: The modification of the P.Vst,rs curve after ascitic drainage suggests that the chest wall mechanics (and not the lung) was mainly responsible for the shape of the curve before draining. This observation emphasizes the importance of partitioning the respiratory system mechanics into its two (chest wall and lung) components.
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