Investigation of Postoperative Pulmonary Complication Risk Factors for Patients with Respiratory Dysfunction Subjected to Surgery

Primary outcome(s): As a preoperative factor, a surgical expression (laparotomy, laparoscope), surgical procedure (laparotomy, laparoscopic surgery) as a surgical factor, respiratory function test (% VC, vital capacity, 1 second amount, 1 second rate), past history, smoking history, About surgical time, anesthesia time, anesthesia method Use Mann - Whitney test, chi - square test, logistic regression analysis to investigate the possibility of general anesthesia and the risk factor of postoperative pulmonary complications.