Abstract:Objective To investigate the efficacy of lymph node localization by preoperative CT combined with carbon nanoscale technique in radical gastrectomy for gastric cancer. Methods Totally 64 cases of gastric carcinoma who were admitted into our hospital from January 2016 to August 2017 for radical surgery were randomly divided into control group and combination group. All patients were performed with spiral plain and enhanced CT examination for preoperative localization lymph node. Patients in the combination group received additional carbon Nano-tracer technology. Results A total of 737 lymph nodes were identified in control group, with an average of (23.28?±?8.24) lymph nodes eradicated. A total of 963 lymph nodes were detected in combination group, with an average of (30.56?±?7.17) eradicated. The average number of lymph nodes and second stations in the combinationgroup was significantly higher than those in the control group (P?0.05). Postoperative pathological results showed that the positive rate of lymph node metastasis in the combination group was increased significantly than that in the control group (23.47% vs 19.02%, P?0.05). Following up results showed that the recurrence rate for 1.5 years of recurrence rate in the combination group was slightly lower than that in the control group (9.37% vs 12.50%). Conclusions Preoperative CT localization combined with carbon Nano tracing technique is of great guiding significance for lymph node dissection in radical gastrectomy.