venous admixture
1.Arterial and pulmonary blood gases were analyzed before induction,OLV60,120min,OLV135,150,180min(after epidural block 15,30,60min) and 30min after resuming two-lung ventilation (TLV) in all patients, respectively. Venous admixture percentage (Qs/Qt),arterial and mixture venous oxygen content were measured. MAP, MPAP, CVP, HR and CI at each time point were recorded.
