The Effect of Permissive Hypercapnia on Oxygenation and Post-operative Pulmonary Complication During One-lung Ventilation

Exclusion Criteria

• •1. patients with heart failure (NYHA class III\~IV)
• •2. patients who are having moderate obstructive lung disease or restrictive lung disease
• •3. Low DLCO (\< 75%)
• •4. patients with brain disease history or increased ICP
• •5. patients with pulmonary hypertension (mean PAP\>25mmHg)
• •6. patients with liver disease (AST level ≥100 IU/mL or ALT ≥ level 50 IU/L) or kidney disease (Creatine level ≥ 1.5 mg/dL)
• •7. patients with pre-existing hypercapnia or metabolic acidosis
• •8. body mass index (BMI) \> 30 kg/m2
• •9. patients who have had contralateral lung surgery
• •10. patients who cannot read explanation and consent form
• •11. patients who are pregnant