AIM: To compare the short-term clinical outcomes of robot-assisted gastrectomy(RAG) with laparoscopyassisted gastrectomy(LAG) in gastric cancer patients.METHODS: Articles were identified through a literature search of...AIM: To compare the short-term clinical outcomes of robot-assisted gastrectomy(RAG) with laparoscopyassisted gastrectomy(LAG) in gastric cancer patients.METHODS: Articles were identified through a literature search of Pubmed, EMBASE, Scopus, Web of Science, Chinese National Knowledge Infrastructure and the Cochrane Library. Weighted mean differences(WMDs) and odds ratios(ORs) were selected as effect sizes for quantitative variables and qualitative variables, respectively. And 95%CIs were also calculated.RESULTS: A total of 13 studies with 3518 patients were included. RAG was associated with longer operative time(WMD = 46.26 min, 95%CI: 31.89-60.63, P < 0.00001), less blood loss [WMD =-37.19 m L, 95%CI:-60.16-(-14.23), P = 0.002] and shorter postoperative hospital stay [WMD =-0.65 d, 95%CI:-1.24-(-0.05), P = 0.03] than LAG. No significant difference in the numbers of retrieved lymph nodes was found between the two groups(WMD = 1.46, 95%CI:-0.19-3.10, P = 0.08). There was no significant difference in mortality(OR = 1.55, 95%CI: 0.49-4.94, P = 0.45), overall complications(OR = 1.00, 95%CI: 0.80-1.26, P = 0.98), anastomosis leakage(OR = 1.02, 95%CI: 0.62-1.65, P = 0.95) and anastomosis stenosis rates(OR = 0.54, 95%CI: 0.18-1.57, P = 0.25). CONCLUSION: RAG is effective and safe in the treatment of gastric cancer. RAG is a promising alternative to laparoscopic surgery. Long-term randomized controlled studies with large scale and improved designs are needed to further evaluate the long-term outcomes.展开更多
Nanocomposites composed of SnO2 and CuO were prepared by hydrothermal method. The microstructures of obtained SnO2-CuO powders were characterized by X-ray diffraction, scanning electron microscopy, transmission electr...Nanocomposites composed of SnO2 and CuO were prepared by hydrothermal method. The microstructures of obtained SnO2-CuO powders were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption test. The results show that the nanocomposites exhibited coral-like nanostructure, and the average crystalline size of SnO2 was 12 nm. The specific surface area of the four samples, SnO2- 0.2CuO, SnO2-0.5CuO, SnO2-1.0CuO and SnO2-2.0CuO are 72.97, 58.77, 49.72 and 54.95 m2/g, respectively. The gas sensing performance of the four samples to ethanol, formaldehyde and H2S was studied. The sensor of SnOa-0.5CuO exhibited high response to hydrogen sulfide （4173 to 10 ppm H2S, where ppm represent 10-6）, and low response to ethanol and formaldehyde. The good selectivity exhibited that the SnO2-0.5CuO nanocomposite can be a promising candidate for highly sensitive and selective gas-sensing material to H2S.展开更多
文摘AIM: To compare the short-term clinical outcomes of robot-assisted gastrectomy(RAG) with laparoscopyassisted gastrectomy(LAG) in gastric cancer patients.METHODS: Articles were identified through a literature search of Pubmed, EMBASE, Scopus, Web of Science, Chinese National Knowledge Infrastructure and the Cochrane Library. Weighted mean differences(WMDs) and odds ratios(ORs) were selected as effect sizes for quantitative variables and qualitative variables, respectively. And 95%CIs were also calculated.RESULTS: A total of 13 studies with 3518 patients were included. RAG was associated with longer operative time(WMD = 46.26 min, 95%CI: 31.89-60.63, P < 0.00001), less blood loss [WMD =-37.19 m L, 95%CI:-60.16-(-14.23), P = 0.002] and shorter postoperative hospital stay [WMD =-0.65 d, 95%CI:-1.24-(-0.05), P = 0.03] than LAG. No significant difference in the numbers of retrieved lymph nodes was found between the two groups(WMD = 1.46, 95%CI:-0.19-3.10, P = 0.08). There was no significant difference in mortality(OR = 1.55, 95%CI: 0.49-4.94, P = 0.45), overall complications(OR = 1.00, 95%CI: 0.80-1.26, P = 0.98), anastomosis leakage(OR = 1.02, 95%CI: 0.62-1.65, P = 0.95) and anastomosis stenosis rates(OR = 0.54, 95%CI: 0.18-1.57, P = 0.25). CONCLUSION: RAG is effective and safe in the treatment of gastric cancer. RAG is a promising alternative to laparoscopic surgery. Long-term randomized controlled studies with large scale and improved designs are needed to further evaluate the long-term outcomes.
基金financially supported by the National Natural Science Foundation of China (No. 51072141)the scientific research projects of Education Department of Hubei province (D20141503)the President Foundation of Wuhan Institute of Technology (No. 2014029)
文摘Nanocomposites composed of SnO2 and CuO were prepared by hydrothermal method. The microstructures of obtained SnO2-CuO powders were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption test. The results show that the nanocomposites exhibited coral-like nanostructure, and the average crystalline size of SnO2 was 12 nm. The specific surface area of the four samples, SnO2- 0.2CuO, SnO2-0.5CuO, SnO2-1.0CuO and SnO2-2.0CuO are 72.97, 58.77, 49.72 and 54.95 m2/g, respectively. The gas sensing performance of the four samples to ethanol, formaldehyde and H2S was studied. The sensor of SnOa-0.5CuO exhibited high response to hydrogen sulfide （4173 to 10 ppm H2S, where ppm represent 10-6）, and low response to ethanol and formaldehyde. The good selectivity exhibited that the SnO2-0.5CuO nanocomposite can be a promising candidate for highly sensitive and selective gas-sensing material to H2S.
