Comparison Between Volatile Anesthetic-desflurane and Total Intravenous Anesthesia With Propofol and Remifentanil on Early Recovery Quality and Long Term Prognosis of Patients Undergoing Pancreatic Cancer and Common Bile Duct Cancer Surgery

Inclusion Criteria: * Patients with ASA class I-III who are scheduled to undergo general anesthesia and who are diagnosed with pancreatic cancer or common bile duct cancer and who are scheduled for PPPD or distal pancreatectomy * patients who voluntarily agree to participate the clinical study after fully informed and understood about the study Exclusion Criteria: * there was distant metastasis at the time of diagnosis * history of drug adverse reaction or use of opioid or sedative drugs before the surgery * patients who can not communicate enough to answer the survey * obesity patients over BMI 30 * patient who are expected to maintain ventilator care on the first day of post operation due to the difficult to extubation right after the surgery * patients who have inappropriate reasons to participate in clinical research