Figure 1

Experimental set up. (a) Simplified scheme of set up applied to test ventilators. (b) Labview GUI for extrapolating parameters from the pressure wave delivered from ventilators: on the left the acquired pressure curve is shown in real time and the related air flow -Q- is reported below, according to the fictional C range imposed by the user; on the right, the pressure wave features that are extrapolated by the software are shown: T , fr , t_i and t_e , PIP, PEEP and ΔP , MAP, supposed V_T and VM.