Fig. 5From: Regional expiratory time constants in severe respiratory failure estimated by electrical impedance tomography: a feasibility studyTypical examples of τ determined at different positive end-expiratory pressure (PEEP) levels in pneumonia/acute respiratory distress syndrome (ARDS) (a), in stiff lungs (b) and in chronic obstructive pulmonary disease (COPD) (c and d) with its regional distribution. NA = not applicableBack to article page