Postoperative pulmonary complications and hospital stay after lung resection surgery: A meta-analysis comparing nonintubated and intubated anesthesia

BACKGROUND: Since postoperative pulmonary complications are one of the main causes of morbidity and mortality in patients undergoing lung resection surgery, we performed a meta-analysis to compare the incidence of postoperative pulmonary complications and hospital death, and the length of hospital stay in patients who received nonintubated or intubated anesthesia during thoracoscopic surgery for lung resection and further explore the tricks in nonintubated anesthesia. METHODS: PubMed, Embase, and Cochrane Library were searched from inception to September 2017. We included eligible research comparing nonintubated anesthesia with intubated anesthesia in thoracoscopic surgery for lung resection. The primary outcomes involved postoperative pulmonary complications, hospital death, and hospital stay. The rates and causes of conversion from nonintubated anesthesia to intubated anesthesia were also analyzed. RESULTS: After screening through 754 potentially relevant articles, we included 3 randomized controlled trials and 7 observational studies with 1138 patients. There was no perioperative mortality in 2 groups. The nonintubated group revealed comparable postoperative pulmonary complications (OR = 0.57; P = .07; P for heterogeneity = .49, I(2) = 0%) and shorter hospital stay (WMD = −1.10; P < .00001; P for heterogeneity = .84, I(2) = 0%) in overall findings with little heterogeneity. CONCLUSION: Nonintubated anesthesia in thoracoscopic surgery for lung resection shortened the length of hospital stay compared with intubated anesthesia. However, the incidence of postoperative pulmonary complications was comparable between nonintubated and intubated group. Given the potential perioperative emergencies, such as persistent hypoxemia, carbon dioxide retention, or extensive pleural adhesions, nonintubated anesthesia in lung resection surgery requires extra vigilance to ensure the safety of the patients and the success of the surgery. Powerful randomized controlled trials in the future are essential to provide more certainty and address long-term effectiveness. Only when anesthesiologists and surgeons make efforts together can better clinical outcomes in lung resection surgery be achieved.