Fig. 2From: Speaking valves in tracheostomised ICU patients weaning off mechanical ventilation - do they facilitate lung recruitment?Mean end-expiratory lung impedance (EELI) vs time with average EELI trend for non-vent and pressure support ventilation (PSV). Mean EELI is plotted on the y-axis against a nominal time base. A lowess smoothing line has been added to clarify the overall trend. non-vent patient off mechanical ventilation during recruitment, SV speaking valveBack to article page