检索结果-南通市图书馆

部分涂层金属支架治疗继发于慢性胰腺炎的症状性胆总管狭窄:一项初步研究

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（胃肠病学分册） 2005年第11期1卷 27-28页

作者： Cantù P. Hookey L.C. Morales A. j. deviè re 尹勇 Department of Gastroenterology Erasme University Hospital Rue de Lennik 808 1070 Brussels BelgiumDr.

Background and study aims: Although surgery remains the gold standard for the treatment of symptomatic common bile duct stenosis associated with chronic pancreatitis, plastic and self-expandable open-mesh stents have been proposed as alternative treatments. These may dysfunction, however, mainly due to stent occlusion by clogging or by hyperplasia of inflammatory tissue. The aim of this study was to evaluate the safety and long-term results of using partially covered metal stents in this setting. Patients and methods: A total of 14 patients (12 men, 2 women; mean age 50 ± 3 years) underwent partially covered metal stent insertion for common bile duct stenosis secondary to chronic pancreatitis (12 alcohol-related, two idiopathic). They had all been treated previously with plastic prostheses. results: Either a 40-mm (n = 13) or a 60-mm (n = 1) partially covered metal stent was placed, depending on the length of the common bile duct stenosis and the level of the cystic duct bifurcation. Stent placement was successful, with resolution of cholangitis and improvement in cholestasis, in all patients. During the median follow-up period of 22 months (range 12- 33 months)- seven patients developed dysfunction of the stent and required re-treatment. At 12, 24, and 30 months, the stent patency rates were 100% , 40% , and 37.5% respectively. Conclusions: While partially covered metal stenting is safe and effective for the initial treatment of chronic pancreatitis-associated common bile duct stenosis and shows promising short-term results, long-term data show that dysfunction occurs in 50% of cases. In light of the continued interest in nonsurgical treatment of this condition, further research is warranted to investigate new stent designs with improved long-term patency.

关键词：慢性胰腺炎胆总管狭窄金属支架胆管支架远期通畅率外科手术功能障碍炎性组织短期疗效胆汁淤积

在线全文

学校读者我要写书评

暂无评论

重型慢性胰腺炎支架植入后长期结果

世界核心医学期刊文摘（胃肠病学分册） 2005年第8期1卷 16-17页

作者： Eleftheriadis N Dinu F Delhaye M. j.devière 王志宇 Department of Gast roenterology UniversitéLibre De Bruxelles Hpital Erasme Route de Lennik 80 8 1070 Brussels Belgium.Dr

Background and Study Aims: Although it has been proved that pancreatic stentin g is effective in the symptomatic management of severe chronic pancreatitis, lon g-term outcomes after stent removal have not been fully evaluated. Patients and Methods: A total of 100 patients (75 men, 25 women; median age 49) with severe chronic pancreatitis and pancreatic duct strictures were successfully treated fo r pancreatic pain using polyethylene pancreatic stents and were followed up for at least 1 year after stent removal. The stents were exchanged “on demand" (in cases of recurrence of pain) and a definitive stent removal was attempted on the basis of clinical and endoscopic findings. Clinical variables were retrospectiv ely assessed as potential predictors of re-stenting. results: The etiology of t he chronic pancreatitis was alcoholic (77%), idiopathic (18%), or hereditary ( 5%). Patients were followed up for a median period of 69 months (range 14-163 months) after study entry, including a median period of 27 months (range 12 -12 6 months) after stent removal. The median duration of pancreatic stenting before stent removal was 23 months (range 2 -134 months). After attempted definitive stent removal, 30 patients (30%) required re-stenting within the first year of follow-up, at a median time of 5.5 months after stent removal (range 1-12 mon ths), while in 70 patients (70%) pain control remained adequate during that period. By the end of the follow-up period a total of 38 patients had require d re-stenting and four ultimately underwent pancreaticojejunostomy. Pancreas di visum was the only factor significantly associated with a higher risk of re-ste nting (P = 0.002). Conclusions: The majority (70%) of patients with severe chro nic pancreatitis who respond to pancreatic stenting maintain this response after definitive stent removal. However,a significantly higher re-stenting rate was observed in patients with chronic pancreatitis and pancreas divisum.

关键词：慢性胰腺炎支架植入胰空肠吻合术良好反应疼痛控制内镜检查回顾性评价

内镜专题会议期间内镜下逆行胆胰管造影现场演示的并发症

在线全文

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（胃肠病学分册） 2005年第11期1卷 22-22页

作者： Schmit A. Lazaraki G. Hittelet A. j. devière 尹勇 Dept. of Gastroenterology Erasmus Hospital Route de Lennik 808 1070 Brussels BelgiumDr.

Background and study aims: Endoscopy workshops are thought to be associated with larger numbers of complications than routine clinical treatment. In this study, patients who underwent endoscopic retrograde cholangiopancreatography (ERCP) during live demonstrations were compared with matched patients treated in an ERCP unit. Patients and methods: Patients who underwent ERCP during workshops over a 12-year period were reviewed. The control for each patient was the next patient admitted to the same ERCP unit with similar indications. Possible delays before treatment, ERCP indications, the use of general anesthesia, standard endoscopic and special treatments, success and complication rates for ERCP, prolonged hospitalization periods, and financial benefits for patients were assessed. results: A total of 168 workshop patients and 168 control patients were compared. ERCP was delayed in 18 patients to allow treatment during the workshops. General anesthesia was used in 87.5% of the workshop patients, in comparison with 44% of the control patients (P re did not differ, and the endoscopic treatments carried out also did not differ significantly, with the exception of cholangiopancreatoscopy (7% in the workshop group versus 0% ; P re similar in the workshop and control patients, as was the duration of hospitalization. Among the patients treated during workshops, 45% benefited financially, as they were not charged for stents or other devices. Conclusions: These results suggest that, in this setting, ERCP performed during live demonstrations is safe and raises no major ethical problems.

关键词：胆胰管常规临床治疗专题会议伦理学问题暴露时间

胰腺括约肌切开术后胰腺炎的患病风险:一项572例患者回顾

在线全文

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（胃肠病学分册） 2006年第12期2卷 22-22页

作者： Hookey L.C. RioTinto R. Delhaye M. j.devière 刘丽娜 Dept.of Gastroenterology Eramus University HospitalRoute de lennik 8081070 BrusselsBelgium Dr.

Background and study aims:Endoscopic pancreatic sphinc-terotomy is indispensable for many therapeutic endoscopic maneuvers,but is also associated with a higher risk of pancreatitis after endoscopic retrograde cholangiopancreatography(ERCP) .In this study,this subgroup of patients was investigated in order to identify risk factors and protective *** and methods:A retrospective chart review identified 572 endoscopic pancreatic sphincterotomies that met the inclusion *** were examined for indications,endoscopic technique,and outcomes,including ***:A total of 477 patients underwent 572 endoscopic pancreatic sphincterotomies during a 5-year *** for sphincterotomy included chronic pancreatitis(n = 398) ,access for tissue sampling(n = 52) ,acute recurrent pancreatitis(n = 45) ,transpapillary drainage of a pancreatic pseudocyst(n = 32) ,precut access to the common bile duct(n = 29) ,and others(n = 16) .Pancreatic duct drainage was performed in 69.1% of the procedures(nasopancreatic catheter,n = 290,or pancreatic stent placement,n = 105) .Post-ERCP pancreatitis occurred in 69 cases(12.1%) and was severe in *** multivariate analysis identified female sex as being associated with a higher risk of pancreatitis,while an elevated C-reactive protein level,pancreatic ductal stones,sphincterotomy at only the major papilla,and pancreatic duct drainage with a nasopancreatic catheter or stent were associated with a lower ***:This large series of patients undergoing endoscopic pancreatic sphincterotomy provides further evidence that both patient characteristics and technical factors modify the risk profile for post-ERCP *** addition to providing further definition of which patients are at risk,it also suggests that pancreatic duct drainage is an independently significant protective maneuver.

关键词：括约肌切开术后胰腺炎患病风险内镜操作总胆管手术适应证胰胆管引流术技术性因素经鼻

A simulation study on the thermal and wetting behavior of alkane thiol SAM on gold(111) surface

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2014年第4期24卷 405-411页

作者： j.Meena devi Centre for Nanotechnology & Advanced Biomaterials (CeNTAB) and School of Electrical & Electronics Engineering (SEEE) SASTRA University

Molecular dynamics simulations have been performed to investigate the structural,thermal and wetting properties of self-assembled monolayer(SAM) of alkane thiol on gold *** specific heat capacity of the gold SAM surface was found to linearly increase with the temperature in the range 100–300 *** was found to drop down at 400 K and this decrease might be attributed to the disorder of the SAM *** of gold SAM surface for two different terminal groups,namely methyl(hydrophobic),and hydroxy(hydrophilic) was studied at room *** difference in their wetting behavior and the structure of their interfacial water were examined from the estimation of the z density profile,radial distribution function,hydrogen bonds and orientation of water dipoles in the interfacial *** present simulation results suggest that the wetting behavior of the gold SAM surface can be modified by altering the terminal functional group of the SAM chains.

关键词： Gold surface Self-assembled monolayer(SAM) Specific heat capacity Hydration and Molecular dynamics simulation

胰周积液内镜下引流:一项116例患者的病因学、引流技术和效果比较

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（胃肠病学分册） 2006年第9期2卷 35-35页

作者： Hookey L C. Debroux S. Delhaye M. j devière 程妍(译) 王晓君(校) 不详 Department of Gastroenterology Erasme University Hospital Route de Lennik 808 1070 BrusselsBelgium

Background:Pancreatic-fluid collections are frequent sequelae of acute and chronic pancreatitis,and endoscopic drainage of these collections has gained acceptance as an alternative to surgical ***:Patient data,collection characteristics,drainage technique,and outcomes were obtained through chart review and prospective follow-up for 116 patients with attempted endoscopic drainage of symptomatic pancreatic-fluid ***:A total of 116 patients presented with fluid collections classified as acute fluid collection(n = 5),necrosis(n = 8),acute pseudocyst(n = 30),chronic pseudocyst(n = 64),and pancreatic abscess(n = 9).The median diameter of the collection drained was 60 mm(15-275 mm).Median follow-up after drainage was 21 *** drainage technique was transpapillary in 15 patients,transmural in 60,and both in *** resolution of symptoms and collection occurred in 87.9%of *** difference in success rates was observed between patients with acute pancreatitis and those with chronic ***,drainage of organized necrosis was associated with a significantly higher failure rate than other *** significant differences were observed regarding success when disease,drainage technique,or site of drainage was *** occurred in 13 patients(11%),and there were 6 deaths in the 30 days after drainage,including one that was procedure ***:Endoscopic drainage of pancreatic-fluid collections is successful in the majority of patients and is accompanied by an acceptable complication rate.

关键词：胰周积液引流技术内镜下效果比较病因学急性胰腺炎慢性胰腺炎引流术式

Deep insights into the advancements and applications of perovskite based photovoltaic cells

在线全文

学校读者我要写书评

暂无评论

journal of Energy Chemistry 2018年第3期27卷 753-763页

作者： Chandni devi Rajesh Mehra Electronics and Communication Department NITTTR

The organometal halide perovskite materials have a blend of surprising optoelectronic properties, for example high value of absorption coefficient and abrupt optical retention edge, lifetime, long charge carrier diffusion length and many more. Brought in conjunction with the capacity for manufacturing at low temperature, likewise from the solution, devices based on perovskite, particularly solar cells have been contemplated seriously with striking advancements in performance, in the course of recent years. The amalgamation of minimal effort, high efficiency and extra applications gives incredible potential to commercialization of these cells. The applications and performance of perovskite cells frequently relate with the structures of the device. Numerous creative structures of the devices were produced, targeting for vast scale manufacture, diminishing creation cost, upgrading the PCE and subsequently expanding the prospective for future applications. This paper outlines the various advanced structures of PSC, challenges confronted by these PSCs and their future perspectives. The commercial applications of PSC are additionally talked about in this paper.

关键词： Solar cells Flexibility ETM Perovskite HTM Structures

Plant diversity, population structure, and regeneration status in disturbed tropical forests in Assam, northeast India

在线全文

学校读者我要写书评

暂无评论

journal of Forestry research 2013年第4期24卷 715-720页

作者： Gitamani Dutta Ashalata devi Department of Environmental Science Tezpur University

We investigated the plant population structure and the phy- tosociological and regeneration status in two disturbed tropical forests in Assam Province, the Hojai reserve Forest and Kumorakata reserve Forest. A total of 166 species （80 trees, 20 shrubs and 66 herbs） of 136 genera and 63 families were recorded in both study sites. The disturbance index at the two sites, Kumorakata reserve Forest and Hojai reserve Forest, were recorded at 11.4% and 3.70% respectively. reverse j-shaped population curve and exploitation of tree species in higher girth classes were recorded at both study sites. In the girth classes （10-30 cm, 30-60 cm, 60-90 cm and 90-120 cm in size） the percentage of cut stump density was higher than the percentage of individual living trees. The 18% （Kumorakata reserve Forest） and 7% （Hojai reserve Forest） spe- cies were recorded as not regenerating. Illegal felling and over-exploitation of forest resources may lead to species-specific changes in the population structure and can alter the future structure and composi- tion of the forests.

关键词： plant diversity regeneration disturbance population struc-ture Assam India

One step synthesis and characterization of copper doped sulfated titania and its enhanced photocatalytic activity in visible light by degradation of methyl orange

在线全文

学校读者我要写书评

暂无评论

Chinese journal of Chemical Engineering 2016年第4期24卷 475-483页

作者： Radha devi Chekuri Siva Rao Tirukkovalluri Department of Inorganic and Analytical Chemistry School of Chemistry Andhra University Visakhapatnam India

This paper reports on the synthesis of copper doped sulfated titania nano-crystalline powders with varying （2.0%-10.0%, by mass） by single step sol gel method. The synthesized photo catalyst has been characterized by employing various techniques like X-ray Diffraction （XRD）, Ultraviolet-Visible Diffuse reflection Spectroscopy （UV-Vis DRS）, X-ray Photoelectron Spectroscopy （XPS）, Scanning Electron Microscopy （SEM）, Energy Dispersive Spectrometry （EDS）, Fourier Transform Infrared Spectroscopic Studies （FT-IR）, and Transmission Electron Microscopy （TEM）. From the XRD and TEM results, all the samples were reported in anatase phase with reduction in particle size in the range of 7 to 12 nm. SEM indicated the change in morphology of the particles. The presence of copper in titania lattice was evidenced by XPS. From UV-Vis DRS and FT-IR studies indicated that prominent absorption shift is observed towards visible region （red shift）, the entry ofCu2 ＋ into Ti02 lattice as a substitution- al dopant and S042- ions were covalently bonded with Ti4＋ on the surface of the copper doped titania respectively. The photocatalytic activity studies were investigated by considering methyl orange （MO） as dye pollutant in the presence of the visible light. The effect of various parameters like effect of dosage of the catalyst, dopant concentration, pH of the solution, and concentration of the dye was studied in detail.

关键词： Copper doped sulfated TiO2 Sol-gel methodPhotocatalysisMethyl orange