Objective To investigate the clinical value of intraoperative unilateral pulmonary circulation short-term block in locally advanced non-small cell lung cancer. Method Eighty patients with locally advanced non-small cell lung cancer were randomly divided into observation group and control group according to the random number table, each group had fourty patients. The patients in control group were treated with routine operation pulmonary artery occlusion,while the patients in observation group underwent unil...