MEchanical ventilation Low tidal volume 6-7mml/ko(400-600mD Leper ventilation y High airway pressure and endogenous pEep Intracranial ypertension; High tidal volume y Distension Too low tidal volume y hypoxia and co2 retentionMechanical ventilation • Low tidal volume 6-7ml/kg（400-600ml） • Hyper ventilation High airway pressure and endogenous PEEP Intracranial hypertension; • High tidal volume Distension • Too low tidal volume hypoxia and CO2 retention