Figure 1From: Control of positive end-expiratory pressure (PEEP) for small animal ventilators Experimental set-up. Experimental setups. Left panel: in vitro - a physical model was employed during experiments; Right panel: in vivo - here the respiratory flow was monitored. SI-E = logic signal that identifies the inspiratory as well as the expiratory cycles; Pao = airways opening pressure; The ON-OFF valve is the valve employed to control the PEEP.Back to article page