Fig. 2From: The effects of thoracic epidural analgesia on oxygenation and pulmonary shunt fraction during one-lung ventilation: an meta-analysisEffect of thoracic epidural analgesia (TEA) on pulmonary venous admixture fraction (Qs/Qt) in general anesthesia (GA) combined with TEA group and GA group during mechanical ventilation: Forest plot showing pooled analysis of the WMD of Qs/Qt in two groups during two-lung ventilation (01), one-lung ventilation within 30 min (02), one-lung ventilation more than 30 min (03) and re-two-lung ventilation (04) based on the fixed effects model. CI = confidence intervalBack to article page