Objective To explore the risk factors of cardiopulmonary complications after radical lung cancer surgery and the predictive value of lung ultrasound score in postoperative cardiopulmonary complications.

Methods A total of 132 patients who underwent elective radical resection of lung cancer in Shanghai Chest Hospital from June 2022 to December 2022 were selected. According to the occurrence of cardiopulmonary complications, patients were divided into the complication group (n＝16) and the non-complication group (n＝116). The general data, lung ultrasound score, operation related information and postoperative cardiopulmonary complications of the two groups were compared. A preoperative lung ultrasound examination was performed to obtain the lung ultrasound score through 12-zone method. Logistic regression analysis was used to determine the risk factors of postoperative cardiopulmonary complications, and the ROC curve was used to construct the predictive model of lung ultrasound score for the occurrence of postoperative cardiopulmonary complications after radical resection of lung cancer.

Results The incidence of cardiopulmonary complications was 12.1% (16/132). There were statistically significant differences between the complication group and the non-complication group in age, gender, surgical method, surgical scope and lung ultrasound score (P < 0.05). The total lung ultrasound scores in the complication group were significantly higher than those in the non-complication group (11.0±6.9 vs 3.6±4.5, P＝0.001). Logistic regression analysis showed that surgical scope and lung ultrasound score were risk factors for cardiopulmonary complications. ROC curve analysis showed that the cutoff value of lung ultrasound score for predicting the occurrence of cardiopulmonary complications after radical lung cancer surgery was 12.5, and area under the curve (AUC) was 0.812 (95%CI 0.687-0.938).

Conclusions Surgical scope and lung ultrasound score are risk factors for cardiopulmonary complications after radical resection of lung cancer. Lung ultrasound score could predict postoperative cardiopulmonary complications, and the risk of complications is higher when the lung ultrasound score is greater than 12.5.