检索结果-南通市图书馆

biliary strictures complicating living donor liver transplantation:Problems,novel insights and solutions

World Journal of Gastroenterology 2018年第19期24卷 2061-2072页

作者： harshavardhan b rao Arjun Prakash Surendran Sudhindran Rama P Venu Department of Gastroenterology Amrita Institute of Medical SciencesAmrita UniversityKochi 682041India Department of Transplant and Vascular Surgery Amrita Institute of Medical SciencesAmrita UniversityKochi 682041India

biliary stricture complicating living donor liver transplantation(LDLT) is a relatively common complication, occurring in most transplant centres across the world. Cases of biliary strictures are more common in LDLT than in deceased donor liver transplantation. Endoscopic management is the mainstay for biliary strictures complicating LDLT and includes endoscopic retrograde cholangiography, sphincterotomy and stent placement(with or without balloon dilatation). The efficacy and safety profiles as well as outcomes of endoscopic management of biliary strictures complicating LDLT is an area that needs to be viewed in isolation, owing to its unique set of problems and attending complications; as such, it merits a tailored approach, which is yet to be well established. The diagnostic criteria applied to these strictures are not uniform and are over-reliant on imaging studies showing an anastomotic narrowing. It has to be kept in mind that in the setting of LDLT, a subjective anastomotic narrowing is present in most cases due to a mismatch in ductal diameters. However, whether this narrowing results in a functionally significant narrowing is a question that needs further study. In addition, wide variation in the endotherapy protocols practised in most centres makes it difficult to interpret the results and hampers our understanding of this topic. The outcome definition for endotherapy is also heterogenous and needs to be standardised to allow for comparison of data in this regard and establish a clinical practice guideline. There have been multiple studies in this area in the last 2 years, with novel findings that have provided solutions to some of these issues. This review endeavours to incorporate these new findings into the wider understanding of endotherapy for biliary strictures complicating LDLT, with specific emphasis on diagnosis of strictures in the LDLT setting, endotherapy protocols and outcome definitions. An attempt is made to present the best management optio

关键词： biliary strictures Endoscopic management Stenting Self-expanding metal stents Living donor liver transplantation

来源：

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

Endoscopic therapy for biliary strictures complicating living donor liver transplantation: Factors predicting better outcome

引用

World Journal of Gastrointestinal Pathophysiology 2017年第2期8卷 77-86页

作者： harshavardhan b rao Hasim Ahamed Suprabha Panicker Surendran Sudhindran Rama P Venu Department of Gastroenterology Amrita Institute of Medical Sciences Department of Gastrointestinal Surgery Amrita Institute of Medical Sciences

AIM To identify factors predicting outcome of endoscopic therapy in bile duct strictures(bDS) post living donor liver transplantation(LDLT).METHODS Patients referred with bDS post LDLT, were retrospectively studied. Patient demographics, symptoms(Pruritus, Jaundice, cholangitis), intra-op variables(cold ischemia time, blood transfusions, number of ducts used, etc.), peri-op complications [hepatic artery thrombosis(HAT), bile leak, infections], stricture morphology(length, donor and recipient duct diameters) and relevant laboratory data both pre-and post-endotherapy were studied. Favourable response to endotherapy was defined as symptomatic relief with > 80% reduction in total bilirubin/serum gamma glutamyl transferase. Statistical analysis was performed using SPSS *** Forty-one patients were included(age: 8-63 years). All had right lobe LDLT with duct-to-duct anastomosis. Twenty patients(48.7%) had favourable response to endotherapy. Patients with single duct anastomosis, aggressive stent therapy(multiple endoscopic retrogradecholagiography, upsizing of stents, dilatation and longer duration of stents) and an initial favourable response to endotherapy were independent predictors of good outcome(P bile leak(> 4 wk post LT) were found to be significant predictors of poor response on multivariate analysis(P better outcome. Multiple ductal anastomosis, older donor age, shorter duration of stent therapy, early bile leak and HAT were predictors of poor outcome with endotherapy in these patients.

关键词： biliary strictures Living donor liver transplantation Endotherapy bile leaks

来源：

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

Artificial intelligence in endoscopy: More than what meets the eye in screening colonoscopy and endosonographic evaluation of pancreatic lesions

引用

Artificial Intelligence in Gastrointestinal Endoscopy 2022年第3期3卷 16-30页

作者： harshavardhan rao b Judy A Trieu Priya Nair Gilad Gressel Mukund Venu Rama P Venu Department of Gastroenterology Amrita Institute of Medical SciencesKochi 682041KeralaIndia Internal Medicine-Gastroenterology Loyola University Medical CenterMaywoodIL 60153United States Center for Cyber Security Systems and Networks Amrita VishwavidyapeethamKollam 690546KeralaIndia

Artificial intelligence(AI)-based tools have ushered in a new era of innovation in the field of gastrointestinal(GI)*** vast improvements in endoscopic techniques and equipment,diagnostic endoscopy remains heavily operator-dependent,in particular,colonoscopy and endoscopic ultrasound(EUS).Recent reports have shown that as much as 25%of colonic adenomas may be missed at *** can result in an increased incidence of interval colon ***,EUS has been shown to have high inter-observer variability,overlap in diagnoses with a relatively low specificity for pancreatic *** understanding of Machine-learning(ML)techniques in AI have evolved over the last decade and its application in AI–based tools for endoscopic detection and diagnosis is being actively investigated at several *** is an aspect of AI that is based on neural networks,and is widely used for image classification,object detection,and semantic segmentation which are key functional aspects of AI-related computer aided diagnostic *** this review,current status and limitations of ML,specifically for adenoma detection and endosonographic diagnosis of pancreatic lesions,will be summarized from existing *** will help to better understand its role as viewed through the prism of real world application in the field of GI endoscopy.

关键词： Artificial intelligence Artificial Machine Colonoscopy Polyp Endosonography Pancreas

来源：

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

Role of endoscopic ultrasound guided fine needle aspiration/biopsy in the evaluation of intra-abdominal lymphadenopathy due to tuberculosis

引用

World Journal of Gastrointestinal Endoscopy 2021年第12期13卷 649-658页

作者： harshavardhan rao b Priya Nair S Krishna Priya Archana George Vallonthaiel Dipu T Sathyapalan Anoop K Koshy Rama P Venu Department of Gastroenterology Amrita Institute of Medical SciencesKochi 682041KeralaIndia Department of Pathology Amrita Institute of Medical SciencesKochi 682041KeralaIndia Department of Internal Medicine Amrita Institute of Medical Sciences and Research CentreKochi 682041KeralaIndia

bACKGROUND Intra-abdominal lymphadenopathy due to tuberculosis(Tb)poses a diagnostic challenge due to difficulty in tissue *** endoscopic ultrasound guided fine needle aspiration/biopsy(EUS-FNA/b)has shown promise in the evaluation of mediastinal lymph nodes,its role in the evaluation of intra-abdominal lymphadenopathy is not *** To assess the role of EUS-FNA/b in the evaluation of intra-abdominal lymphadenopathy due to *** This was a retrospective study where patients with intra-abdominal lymphadenopathy who underwent evaluation with EUS-FNA/b were *** was diagnosed if the patient had any one of the following:(1)Positive acid fast bacilli(AFb)stain/Tb GeneXpert/Tb-polymerase chain reaction/AFb culture of tissue sample;and(2)Positive Mantoux test and response to anti-tubercular ***-FNA reports,clinical reports and imaging characteristics of patients were recorded for a detailed analysis of patients with *** A total of 149 patients underwent an EUS-FNA/b from lymph nodes(mean age 51±17 years,M:F=1.2).benign inflammatory reactive changes were seen in 45 patients(30.2%),while 54 patients(36.2%)showed granulomatous inflammation with/without *** these,51 patients(94.4%)were confirmed to have Tb as per pre-defined *** with Tb were more likely to have hypoechoic and matted nodes[40 patients(67.7%)].EUS-FNA/b was found to have a sensitivity and specificity of 86%and 93%respectively,with a diagnostic accuracy of 88%in the evaluation of intra-abdominal lymphadenopathy due to *** EUS-FNA/b has a high diagnostic yield with a good sensitivity and specificity in the evaluation of intra-abdominal lymphadenopathy due to ***,the validity of these findings in populations with low prevalence of Tb needs further evaluation.

关键词： Endoscopic ultrasound Lymph nodes Tuberculosis Mesenteric Intraabdominal

来源：

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

Representation of classifier distributions in terms of hypergeometric functions

引用

China Particuology 2007年第4期5卷 274-283页

作者： b.Venkoba rao Engineering and Industrial Services Tata Consultancy Services Ltd.1 Mangaldas RoadPune 411001India

This paper derives alternative analytical expressions for classifier product distributions in terms of Gauss hypergeometric function, 2F1, by considering feed distribution defined in terms of Gates-Gaudin-Schumann function and efficiency curve defined in terms of a logistic function. It is shown that classifier distributions under dispersed conditions of classification pivot at a common size and the distributions are difference similar. The paper also addresses an inverse problem of classifier distributions wherein the feed distribution and efficiency curve are identified from the measured product distributions without needing to know the solid flow split of particles to any of the product streams.

关键词： Classifier Efficiency curve Inverse problem

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An ecofriendly approach for corrosion control of 6061 Al-15%(v)SiC(P)composite and its base alloy

引用

Chinese Journal of Chemical Engineering 2017年第3期25卷 363-372页

作者： Charitha b.P. Padmalatha rao Department of chemistry Manipal Institute of TechnologyManipalUdupiKamatakaIndia

Corrosion inhibition characteristics of bio polymer dextran was studied for the corrosion control of 6061 Al-15%_((v)) SiC_((P)) composite and its base alloy in 1 mol·L^(-1) HCl. Standard electrochemical techniques such as potentiodynamic polarization(PDP) measurements and electrochemical impedance spectroscopy(EIS) method were adopted for corrosion rate measurement. Surface morphology was studied by scanning electron microscopy(SEM) and elemental mapping was done by energy dispersive X-ray(EDX) analysis. Suitable mechanism was proposed for corrosion and inhibition process. Results indicated that dextran acts as an excellent anticorrosive agent for the corrosion control of 6061 Al-15%_((v)) SiC_((P)) composite, with maximum inhibition efficiency of 91% for the concentration of 0.4 g·L^(-1) at 303 K. Dextran acted as a mixed type of inhibitor, and got physically adsorbed both on composite and base alloy by obeying Langmuir adsorption isotherm. Dextran is proved to be a green inhibitor with environmental and economic benefits.

关键词： 6061 Al-15%(v) SiC(p) composite Green inhibitor biopolymer Electrochemical studies SEM–EDX

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hepatoprotective and antioxidant capacity of Melochia corchorifolia extracts

引用

Asian Pacific Journal of Tropical Medicine 2013年第7期6卷 537-543页

作者： b Ganga rao Y Venkateswara rao T Mallikarjuna rao A.U College of Pharmaceutical Sciences Andhra UniversityVisakhapatnamAndhra PradeshIndia-530003 Department of botany College of Science and TechnologyAndhra University.VisakhapatnamAndhra PradeshIndia-530003

Objective:To evaluate bepato protective and antioxidant capacity of Melochia corchorifolia （***）aerial part ***:Antioxidant activitywas evaluated by using three free radicals（Superoxide,Hydroxyl and DPPH） and hepatoprotective activity was assessed against CCl4 induced liver intoxication in ***:The extracts produced concentration dependent percentage protection in decrease of serum enzymes and percentage inhibition on free *** all extracts methanol extract showed better activity with percentage protection of SGOT（78.98%）,SGPT（79.65%）,ALP（82.48%） and total bilirubin（80.0%）levels against CCl4 liver intoxication and also methanolic extract showed better activity with IC50 values on superoxide. hydroxyl and DPPH radicals were 127μg.240μg and 179μ***:From the results obtained during the study it could be concluded that *** aerial part extracts have antioxidant and hepaloprotective *** study is necessary for isolation and characterization of bioactive molecules which are responsible for hepatoprotective and antioxidant activity.

关键词： Melochia corchorifolia Aerial parts Free radicals Antioxidant Activity CCl_4 Hepatoprotective activity

来源：

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

Lactobionic Acid as a New Synergist in Combination with Phosphonate-Zn(Ⅱ)System for Corrosion Inhibition of Carbon Steel

引用

Journal of Materials Science & Technology 2014年第1期30卷 77-89页

作者： S.Srinivasa rao b.V.Appa rao S.Roopas Kiran b.Sreedhar Department of Chemistry V.R.Siddhartha Engineering College(Autonomous) Department of Chemistry National Institute of Technology Warangal(NITW) INFN Sezione di Padova Inorganic & Physical Chemistry Division Indian Institute of Chemical Technology(IICT)

Studies on lactobionic acid introduced as a synergist in the presence of phosphonobutane-1,2,4-tricarboxylic acid （PbTC） and zinc ions for corrosion control of carbon steel in aqueous environment are presented. The investigations revealed that lactobionic acid （LbA） acts as an excellent synergist in corrosion inhibition. Optimum concentrations of all the three components of the ternary formulation are established by gravimetric studies. Potentiodynamic polarization studies indicate that the new ternary system is a mixed inhibitor. Impedance studies show that a protective film is formed on the metal surface in the presence of the inhibitor formulation. The film is found to exhibit its protective nature even at higher temperatures up to 60 ~C. Analysis of the protective film by X-ray photoelectron spectroscopy （XPS） and reflection absorption Fourier transform infrared （FTIR） spectroscopy infers the presence of Zn（OH）2, oxides and hydroxides of iron and the inhibitor molecules in the surface film probably in the form of a complex, [Zn（II）-PbTC-LbA]. The morphological studies by scanning electron microscopy （SEM） and the topographical studies by atomic force microscopy （AFM） also indicate the presence of protective film on the metal surface. A plausible mechanism of corrosion inhibition is proposed.

关键词： Corrosion inhibitor Carbon steel Synergism X-ray photoelectron spectroscopy Electrochemical impedance spectroscopy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Experimental study on the partition behaviour of Ta, Nb and W between different phases in the processes of crystallization differentiation of albite granitic magma

引用

Chinese Science bulletin 1997年第16期42卷 1372-1377页

作者： Zhao, JS Zhao, b rao, b Chinese Acad Sci Guangzhou Inst Geochem Guangzhou 510640 Peoples R China Nanjing Univ Dept Earth Sci Nanjing 210008 Peoples R China

To counter the lack of consensus of opinion on mineralizations of Ta, Nb and W which have genetic relationship to fluorine-rich albite granite and the want of experimental evidence at present, some experiments reported in this study were carried out. The purpose of this study is to explain the genetic connection of Ta, Nb and W ore deposits and possible mechanism of their mineralization with the aid of the experimental results.

关键词： partition behaviour of Ta Nb and W process of crystallization differentiation of magma.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chloride binding and time-dependent surface chloride content models for fly ash concrete

引用

Frontiers of Structural and Civil Engineering 2016年第1期10卷 112-120页

作者： S. MUTHULINGAM b. N. rao Department of Civil Engineering SSN College of Engineering Kalavakkam 603 110 India Structural Engineering Division Department of Civil Engineering Indian Institute of Technology Madras Chennai 600 036 India

Corrosion of embedded rebars is a classical deterioration mechanism of reinforced concrete structures exposed to chloride environments. Such environments can be attributed to the presence of seawater, deicing or sea-salts, which have high concentrations of chloride ion. Chloride ingress into concrete, essential for inducing rebar corrosion, is a complex interaction between many physical and chemical processes. The current study proposes two chloride ingress parameter models for fly ash concrete, namely： 1） surface chloride content under tidal exposure condition; and 2） chloride binding. First, inconsistencies in surface chloride content and chloride binding models reported in literature, due to them not being in line with past research studies, are pointed out. Secondly, to avoid such inconsistencies, surface chloride content and chloride binding models for fly ash concrete are proposed based upon the experimental work done by other researchers. It is observed that, proposed models are simple, consistent and in line with past research studies reported in literature.

关键词： binding isotherms chloride ingress concrete fly ash surface chloride content

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：