Table 2. Ventilatory Variables^*

* Values are mean ± SD.

†P < 0.001 and ‡P < 0.05 compared with high tidal volume (V^T) at zero end-expiratory pressure (ZEEP) mechanical ventilation group. §P < 0.001 and ∥P < 0.005 between low V^Tmechanical ventilation groups.

PEEP = positive end-expiratory pressure; V^E= minute ventilation; T^I= inspiratory time; T^E= expiratory time; Paw^mean= mean airway pressure; Paw^max= maximum airway pressure; PETco²= end-tidal partial pressure of carbon dioxide.