Fig. 5From: Comparison of pressure-controlled ventilation with volume-controlled ventilation during one-lung ventilation: a systematic review and meta-analysisSubgroup analysis during pressure-controlled ventilation compared to volume-controlled ventilation. a The effect of paravertebral block on PaO2/FiO2 ratio (mmHg). b The effect of paravertebral block on PaCO2 (mmHg). c The effect of tidal volume (6–8 ml/kg vs 9–10 ml/kg) on PaO2/FiO2 ratioBack to article page