Background:Physiological changes in the respiratory system that occur immediately after the induction of general anesthesia explain the majority of postoperative complications. Thus, respiratory drive and muscle function are altered, lung volumes reduced, and atelectasis develops in more than 75% of patients receiving neuromuscular blocking drugs (NMBD). This study was conducted to assess postoperative pulmonary complications in patients undergoing abdominal surgeries.Materials and Methods:100 patients who were going to have abdominal surgeries were evaluated for eligibility. The study included all patients, aged 18 to 80, undergoing abdominal surgery who were kept in a postsurgical intensive care unit (ICU) for more than 8 hours after surgery. The designated anaesthetist used a systematic proforma to gather the preoperative and intraoperative characteristics. Following surgery, every patient was sent to the postsurgical intensive care unit (ICU). The patient's data sheet in the ICU was used to track their progress, including any respiratory issues.Results: In this study there were total 100 subjects out of which 49 were males and 51 were females. Out of 100 subjects, pulmonary complications were seen in 25 subjects. Among 12 subjects, cardiac morbidity was associated with pulmonary complications. Among 6 subjects, respiratory morbidity was associated with pulmonary complications. Malignancy, smoking, intraoperative and postoperative complications were the associated factors of pulmonary complications in 3,2,1 and 1 subject, respectively. The mean length of ICU stays of subjects with pulmonary complications had been 12.6 days whereas that of subjects without any complications had been 4.3 days.Conclusion: Postoperative Pulmonary Complications were associated with cardiac comorbidity, respiratory comorbidity, malignancy, intraoperative and postoperative complications. Also, the subjects who had complications had to stay in the ICU for longer period as compared to those who did not have any complications.