Fig. 1.

Individualized shared ventilator setup in an in vivo model. The ventilator we used was a Datex Ohmeda s/5 Aespire, T-connectors split expiratory and inspiratory circuits. The rotatory valve (Sisto-16RGA) is placed in the inspiratory limb to restrict pressure and thus tidal volume to the subject with the highest lung compliance, and an in-line PEEP valve (Intersurgical, ref. 2207000) is added to the expiratory limb of the circuit to set PEEP individually. Side-stream supply of additional oxygen can modulate the FiO₂ that is delivered to each patient. One-way valves (Intersurgical, ref. 1921000) prevent cross-contamination