For lung isolation and better surgical view, one-lung ventilation(OLV) is essential for thoracic surgery. However, OLV may cause serious pulmonary complications due to intraoperative hypoxia.~Animal studies showed a positive effect of OLV preconditioning (Intermittent OLV before surgical intervention) on perioperative pulmonary oxygenation.~Thus, we designed a study to observe the effect of OLV preconditioning on perioperative oxygenation during thoracic surgery
To observe the effect of one-lung ventilation (OLV) preconditioning on perioperative oxygenation during thoracic surgery.