AIM:To observe the frequent complications of stent placement for stricture of the gastrointestinal tract and to find proper treatment.METHODS:A total number of 140 stents were inserted in 138 patients with benign stri...AIM:To observe the frequent complications of stent placement for stricture of the gastrointestinal tract and to find proper treatment.METHODS:A total number of 140 stents were inserted in 138 patients with benign stricture of the gastrointestinal tract.The procedure was cornpleted under fluoroscopy in all of the patients.RESULTS:Stents were successfully placed in all the 138 patients.Pains occurred in 23 patients (16.7%),slight or dull pains were found in 21 patients and severe chest pain in 2 respectively.For the former type of pain,the patients receivedonly analgesia or even no treatment,while peridural anesthesics was conducted for the latter condition. Reflux occurred in 16 of these patients (11.6%) after stent placement.It was managed by common antireflux procedures. Gastrointestinal bleeding occurred in 13 patients (9.4%),and was treated by hemostat.Restenosis of the gastrointestinal tract occurred in 8 patients (5.8%),and was apparently associated with hyperplasia of granulation tissue.In 2 patients,the second stent was placed under X-ray guidance.The granulation tissue was removed by cauterization through hot-node therapy under gastroscope guidance in 3 patients,and surgical reconstruction was performed in another 3 patients. Stent migration occurred in 5 patients (3.6%),and were extracted with the aid of a gastroscope.Food-bolus obstruction was encountered in 2 patients (1.4%) and was treated by endoscope removal.No perforation occurred in all patients.CONCLUSION:Frequent complications after stent placement for benign stricture of the gastrointestinal tract include pain,reflux,bleeding,restenosis,stent migration and food-bolus obstruction.They can be treated by drugs,the second stent placement or gastroscopic procedures according to the specific conditions.展开更多
Hierarchical Ag/Bi2WO6 nanomaterials were prepared by a facile one-step hydrothermal method in mixed acetic acid and ethylene glycol (EG) medium. EG is employed as mild reducing agent for the formation of metallic Ag ...Hierarchical Ag/Bi2WO6 nanomaterials were prepared by a facile one-step hydrothermal method in mixed acetic acid and ethylene glycol (EG) medium. EG is employed as mild reducing agent for the formation of metallic Ag from Ag+ precursors. In situ energy dispersive X-ray diffraction (EDXRD) monitoring showed that the hydrothermal formation kinetics of Bi2WO6 in the presence of EG was significantly slowed down due to its very high viscosity. The photocatalytic activities of Ag/Bi2WO6 composites were evaluated by the photodegradation of methylene blue (MB) under visible light irradiation. The photocatalytic activity of Bi2WO6 is strongly influenced by the Ag loading. The enhanced catalytic activity of the composites is based on the cooperative effects of plasmon absorption band and separation of photogenerated electron-hole pairs.展开更多
基金Supported by the National Key Medical Research and DevelopmentProgram of China during the 9~(th) Five-year Plan Period,No.96-907-03-04Shanghai Nature Science Funds,No.02Zl314073Shanghai Medical Development Funds,No.00419
文摘AIM:To observe the frequent complications of stent placement for stricture of the gastrointestinal tract and to find proper treatment.METHODS:A total number of 140 stents were inserted in 138 patients with benign stricture of the gastrointestinal tract.The procedure was cornpleted under fluoroscopy in all of the patients.RESULTS:Stents were successfully placed in all the 138 patients.Pains occurred in 23 patients (16.7%),slight or dull pains were found in 21 patients and severe chest pain in 2 respectively.For the former type of pain,the patients receivedonly analgesia or even no treatment,while peridural anesthesics was conducted for the latter condition. Reflux occurred in 16 of these patients (11.6%) after stent placement.It was managed by common antireflux procedures. Gastrointestinal bleeding occurred in 13 patients (9.4%),and was treated by hemostat.Restenosis of the gastrointestinal tract occurred in 8 patients (5.8%),and was apparently associated with hyperplasia of granulation tissue.In 2 patients,the second stent was placed under X-ray guidance.The granulation tissue was removed by cauterization through hot-node therapy under gastroscope guidance in 3 patients,and surgical reconstruction was performed in another 3 patients. Stent migration occurred in 5 patients (3.6%),and were extracted with the aid of a gastroscope.Food-bolus obstruction was encountered in 2 patients (1.4%) and was treated by endoscope removal.No perforation occurred in all patients.CONCLUSION:Frequent complications after stent placement for benign stricture of the gastrointestinal tract include pain,reflux,bleeding,restenosis,stent migration and food-bolus obstruction.They can be treated by drugs,the second stent placement or gastroscopic procedures according to the specific conditions.
基金supported by the National Natural Science Foundation of China (51102245 and U1232119)the Innovative Research Team of Southwest Petroleum University (2012XJZT002)the Swiss National Science Foundation (SNSF Professorship PP0P2-133483/1)
文摘Hierarchical Ag/Bi2WO6 nanomaterials were prepared by a facile one-step hydrothermal method in mixed acetic acid and ethylene glycol (EG) medium. EG is employed as mild reducing agent for the formation of metallic Ag from Ag+ precursors. In situ energy dispersive X-ray diffraction (EDXRD) monitoring showed that the hydrothermal formation kinetics of Bi2WO6 in the presence of EG was significantly slowed down due to its very high viscosity. The photocatalytic activities of Ag/Bi2WO6 composites were evaluated by the photodegradation of methylene blue (MB) under visible light irradiation. The photocatalytic activity of Bi2WO6 is strongly influenced by the Ag loading. The enhanced catalytic activity of the composites is based on the cooperative effects of plasmon absorption band and separation of photogenerated electron-hole pairs.
