Effect of Iloprost on Pulmonary Oxygenation in Patients With Low Diffusing Capacity During One-lung Ventilation

"20μg(2ml) of inhaled iloprost (Ventavis®)~When anesthesia induction finishes, change patients' position from supine to lateral position and measure arterial blood gas analysis (ABGA), venous blood gas analysis (VBGA) while two lung is ventilated. After 20 minutes of applying one lung ventilation, measure ABGA. Apply iloprost or normal saline inhalation for each iloprost and control group and measure ABGA at the time of 20 min and 40 min after iloprost (or normal saline) inhalation has finished."

"20μg(2ml) of inhaled normal saline~When anesthesia induction finishes, change patients' position from supine to lateral position and measure ABGA, VBGA while two lung is ventilated. After 20 minutes of applying one lung ventilation, measure ABGA. Apply iloprost or normal saline inhalation for each iloprost and control group and measure ABGA at the time of 20 min and 40 min after iloprost (or normal saline) inhalation has finished."