Abstract: Objective：To analyze the efficacy and safety of Flexthreedimensional thoracoscopic lobectomy and lymph node dissection in the treatment of primary lung cancer.Methods：Sixtyfive patients with primary lung cancer who planned to undergo thoracoscopic lobectomy and lymph node dissection in our hospital from January 2017 to June 2020 were selected and divided into control group(n=32) and observation group(n=33) according to the random number table method.The control group was treated with twodimensional thoracoscopic lobectomy,and the observation group was treated with Flexthreedimensional thoracoscopic lobectomy.The number of lymph node dissections,postoperative pathological staging results,surgical results and clinical indicators,postoperative visual analog pain score(VAS) and complications were compared and observed between the two groups.Results：The number of lymph node dissections in the observation group was 423.The postoperative pathological staging was 29 cases in stage Ⅰ,3 cases in stage Ⅱ,and 1 case in stage Ⅲ.The number of lymph node dissection in the control group was 408.The postoperative pathological stages were 25 cases in stage Ⅰ,4 cases in stage Ⅱ,and 3 cases in stage Ⅲ.There was no significant difference in the results between the two groups(P>0.05).There was no significant difference in intraoperative blood loss between the two groups(P>0.05).The operation time of the observation group was shorter than that of the control group(P>0.05).The VAS scores of the two groups decreased gradually with the passage of operation time.The VAS scores of the observation group were lower than those of the control group at 3 days,1 month and 3 months after surgery(P<0.05).There were no serious complications and deaths in the two groups.The incidence of atelectasis in the observation group was lower than that in the control group(3.03% vs.9.38%,P>0.05).Conclusion：Flexthreedimensional thoracoscopic lobectomy and lymph node dissection are effective in the treatment of primary lung cancer.Through the threedimensional restoration of the anatomical tissue structure,the clarity of the operation and the accuracy of the operation are improved,and it can effectively shorten the operation time,it can reduce the degree of postoperative pain and has high safety.

Key words: primary lung cancer, Flexthreedimensional thoracoscopy, twodimensional thoracoscopy, lobectomy, lymph node dissection