Bias (precision) of parameters estimated using the liquid- or air-filled catheters compared to those obtained with the balloon catheter, in different conditions.

BIPAP: biphasic positive airway pressure; contr MV: controlled mechanical ventilation (with animal paralyzed using atracurium bromide); contr BIPAP: assisted ventilation (allowing unsupported spontaneous breaths), considering only the controlled breaths; spont BIPAP: assisted ventilation, considering only the unsupported spontaneous breaths. EL, Ecw: lung and chest wall elastance; ΔPtrans: inspiratory change in transpulmonary pressure; Ptrans,end-exp: end-expiratory value of transpulmonary pressure; PTP: pressure-time product; WOBi: inspiratory work of breathing. Significance of t-test:*p**p***pBias (precision) of parameters estimated using the liquid- or air-filled catheters compared to those obtained with the balloon catheter, in different conditions.