Objective To explore the feasibility and clinical effect of the nano-carbon particles in laparoscopic operation for adenocarcinoma of esophagogastric junction. Methods From 2008 to 2011， 119 patients with adenocar-cinoma of esophagogastric junction who underwent the laparoscopic operation were divided into study group （n=56） and control group （n=63）. The nano-carbon particle was injected into the subserosa around the tumor using the injection needle made by ourselves for lymphatic tracing before the laparoscopic operation in the study group， while no tracer was given in the control group. The indexes of lymph nodes， operation time， intraoperative blood loss， and postoperative hospital stay were compared in two groups. Results The nano-carbon particle was injected into the subserosa around the tumor successfully in the study group. The numbers of dissected lymph nodes and metastatic lymph nodes in the study group were significantly more than those in the control group （dissected lymph nodes：20.52±4.51 versus 16.44±3.80， t=5.341，P=0.000；metastatic lymph nodes：8.88±3.15 versus 6.49±2.49， t=4.602， P=0.000）. There were no statistical diff-erences in the intraoperative blood loss， operation time， and postoperative hospital stay in two groups 〔intraoperative blood loss：（97.50±27.52） ml versus （96.03±22.83） ml， t=0.318， P=0.751；operation time：（221.07±24.25） min versus （230.48±38.54） min， t=-1.570， P=0.119；postoperative hospital stay （10.82±1.67） d versus （10.29±1.33） d， t=1.945， P=0.054〕. Conclusions Injection of the nano-carbon particles using the injection needle made by ourselves is feasible in laparoscopic operation for adenocarcinoma of esophagogastric junction. It can increase number of dissected lymph nodes without increasing operation time， intraoperative blood loss， and postoperative hospital stay.
Objective To evaluate the effect of laparoscopy-assisted surgery for lymph node dissection in patients with carcinoma of gastric cardia. Methods The clinical data of patients with carcinoma of gastric cardia who underwent either laparoscopy-assisted or open gastrectomy between January 2004 and September 2009 in the Department of General Surgery, the Nanchong Central Hospital were analyzed retrospectively. The number of lymph node dissection was compared. Results Thirty-nine patients underwent laparoscopy-assisted gastrectomy (laparoscopy group) and 63 patients underwent open gastrectomy (open group). There was no significant difference in preoperative complications, type of pathology or pTNM stage between two groups (Pgt;0.05). The number of lymph node dissection was 16.44±6.25 in the laparoscopy group， of which the number of first station lymph node was 10.56±3.78 (metastasis rate was 74.4%), the second station was 3.82±1.82 (metastasis rate was 46.2%), the third station was 2.00±1.36 (metastasis rate was 5.1%); in the open group, the numbers of corresponding lymph node were 16.38±5.83, 10.94±3.91 (metastasis rate was 71.4%), 3.71±1.55 (metastasis rate was 42.9%), and 1.75±1.06 (metastasis rate was 3.2%), respectively. There was no significant difference between two groups (Pgt;0.05). Conclusion The effectiveness of lymph node dissection is satisfactory by laparoscopy-assisted surgery for patients with carcinoma of gastric cardia, but prospective efficacy is still being followed up.