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11990—2017年中国伤害负担:2017年全球疾病负担研究结果(摘译)显示文摘伤害是全球性的公共卫生挑战,涉及各年龄组和不同性别的人群。过去三十年来,中国经济快速发展,人口老龄化趋势加重,社会呈现出城镇化、机动化和老龄化等特征。随着人们生活环境和生活方式的改变,伤害已跃居人群致死原因第五位,仅排在恶性肿瘤、心脑血管疾病、呼吸系统疾病和心肌梗死之后。据估计,中国每年在伤害方面消耗的直接医疗费用约为650亿元人民币.林泽婷(译) 吕来文(译) 黄晓晴(译) 李丽萍(审校) Duan Leilei Ye Pengpeng Juanita A Haagsma Jin Ye Wang Yuan Er Yuliang Deng Xiao Gao Xin Ji Cuirong Wang Linhong Marlena S Bannick W Cli Mountjoy-Venning Caitlin N Hawley Zichen Liu Mari Smith Spencer L James Theo Vos Christopher J L Murray 2020伤害医学(电子版)2020,9,2:15
2系统综述与网状Meta分析的PRISMA扩展声明显示文摘PRISMA声明旨在提高系统综述和META分析报告的完整性,该声明已经广泛用于指导系统综述和META分析的报告和发表。原始的PRISMA声明是针对两种干预措施比较的传统的系统综述与META分析而制定的,然而,随着多种干预措施比较的系统综述的发展,实施和报告这一类系统综述面临较大挑战。此时,针对网状META分析的PRISMA扩展声明应运而生,旨在提高网状META分析系统综述的报告质量。PRISMA扩展声明是由专家们通过DELPHI调查、面对面讨论和共识大会而最终确立的。PRISMA扩展声明是在原始PRISMA声明的报告清单的基础上经过修改,最终确定了32个条目,每个条目均与网状META分析报告的内容直接相关。本文对网状META分析的PRISMA扩展声明进行了阐述,对报告清单各条目进行了举例说明,并详细说明了在原始PRISMA声明的基础上新增和修改各条目的理由。此外,PRISMA扩展声明强调了在网状META分析的实际操作中需要重点关注的信息。本文的目标读者包括网状META分析的作者与读者,以及期刊杂志的编辑与同行评审。李志霞 杨俊 叶欣 周凌波 杨智荣 孙凤 詹思延 Brian Hutton Georgia Salanti Deborah M.Caldwell Anna Chaimani Christopher H.Schmid Chris Cameron John P.A.Ioannidis Sharon Straus Kristian Thorlund Jeroen P.Jansen Cynthia Mulrow Ferrán Catalá-López Peter C.Gozsche Kay Dickersin Isabelle Boutron Douglas G.Altman David Moher 2016中国循证心血管医学杂志2016,8,6:11
3Long-term effects of environmentally relevant concentrations of silver nanoparticles on microbial biomass, enzyme activity,and functional genes involved in the nitrogen cycle of loamy soil显示文摘The increasing production and use of engineered silver nanoparticles(AgNP) in industry and private households are leading to increased concentrations of AgNP in the environment. An ecological risk assessment of AgNP is needed, but it requires understanding the long term effects of environmentally relevant concentrations of AgNP on the soil microbiome. Hence, the aim of this study was to reveal the long-term effects of AgNP on soil microorganisms. The study was conducted as a laboratory incubation experiment over a period of one year using a loamy soil and AgNP concentrations ranging from 0.01 to 1 mg AgNP/kg soil. The short term effects of AgNP were, in general, limited.However, after one year of exposure to 0.01 mg AgNP/kg, there were significant negative effects on soil microbial biomass(quantified by extractable DNA; p = 0.000) and bacterial ammonia oxidizers(quantified by amo A gene copy numbers; p = 0.009). Furthermore, the tested AgNP concentrations significantly decreased the soil microbial biomass, the leucine aminopeptidase activity(quantified by substrate turnover; p = 0.014), and the abundance of nitrogen fixing microorganisms(quantified by nif H gene copy numbers; p = 0.001). The results of the positive control with Ag NO3 revealed predominantly stronger effects due to Ag+ion release. Thus, the increasing toxicity of AgNP during the test period may reflect the long-term release of Ag+ions. Nevertheless, even very low concentrations of AgNP caused disadvantages for the microbial soil community, especially for nitrogen cycling, and our results confirmed the risks of releasing AgNP into the environment.Anna-Lena Grün Susanne Straskraba Stefanie Schulz Michael Schloter Christoph Emmerling 2018Journal of Environmental Sciences2018,30,7:7
4Patterns of cancer recurrence in localized resected hepatocellular carcinoma显示文摘BACKGROUND:Tumor resection in non-metastatic hepatocellular carcinoma(HCC)patients with adequate liver reserve offers a potential cure,but has a high 5-year recurrence rate.We analyzed the patterns of cancer relapse after partial hepatectomy to guide post-operative management.METHODS:A total of 144 HCC patients(1996-2011)after partial hepatectomy were reviewed.Statistical correlations were determined using univariate and partition analyses.RESULTS:A median follow-up of 20 months showed recurrence in 71(49%)patients,and the median time to recurrence was 11.9 months.Vascular invasion(P<0.01)and number of lesions(P<0.01)predicted for recurrence.Histologic grade was not correlated with recurrence.Twenty-two(31%)patients developed both surgical margin(SM)and concurrent intrahepatic recurrences,and 28(40%)had non-SM intrahepatic recurrences with no other signs of recurrence.On partition analysis,the risk of marginal recurrence in patients with SM<1 mm and SM≥1 mm was 35%and 13.5%respectively.Approximately 57%of patients with intrahepatic recurrence had recurrence≤2.5 cm from SM.CONCLUSIONS:Intrahepatic recurrence after partial hepatectomy is common and is significantly associated with vascular invasion and tumor stage.About 57%of patients with intrahepatic relapse had a recurrence close(≤2.5 cm)to the SM.Additionally,patients with SM<1 mm have a higher recurrence rate and may benefit from adjuvant local therapy.Aryavarta MS Kumar Elisha T Fredman Christopher Coppa Galal El-Gazzaz Federico N Aucejo May Abdel-Wahab 2015Hepatobiliary & Pancreatic Diseases International2015,14,3:7
5Role of endoscopic vacuum therapy in the management of gastrointestinal transmural defects显示文摘A gastrointestinal(GI) transmural defect is defined as total rupture of the GI wall,and these defects can be divided into three categories: perforations,leaks,and fistulas. Surgical management of these defects is usually challenging and may be associated with high morbidity and mortality rates. Recently,several novel endoscopic techniques have been developed,and endoscopy has become a firstline approach for therapy of these conditions. The use of endoscopic vacuum therapy(EVT) is increasing with favorable results. This technique involves endoscopic placement of a sponge connected to a nasogastric tube into the defect cavity or lumen. This promotes healing via five mechanisms,including macrodeformation,microdeformation,changes in perfusion,exudate control,and bacterial clearance,which is similar to the mechanisms in which skin wounds are treated with commonly employed wound vacuums. EVT can be used in the upper GI tract,small bowel,biliopancreatic regions,and lower GI tract,with variable success rates and a satisfactory safety profile. In this article,we review and discuss the mechanism of action,materials,techniques,efficacy,and safety of EVT in the management of patients with GI transmural defects.Diogo Turiani Hourneaux de Moura Bruna Furia Buzetti Hourneaux de Moura Michael A Manfredi Kelly E Hathorn Ahmad N Bazarbashi Igor Braga Ribeiro Eduardo Guimaraes Hourneaux de Moura Christopher C Thompson 2019World Journal of Gastrointestinal Endoscopy2019,11,5:6
6Liver transplantation in patients with incidental hepatocellular carcinoma/cholangiocarcinoma and intrahepatic cholangiocarcinoma: a single-center experience显示文摘BACKGROUND: Reports of liver transplantation(LT) in patients with mixed hepatocellular carcinoma/cholangiocarcinoma(HCC/CC) and intrahepatic cholangiocarcinoma(ICC) are modest and have been mostly retrospective after pathological categorization in the setting of presumed HCC. Some studies suggest that patients undergoing LT with small and unifocal ICC or mixed HCC/CC can achieve about 40%-60% 5-year post-transplant survival. The study aimed to report our experience in patients undergoing LT with explant pathology revealing HCC/CC and ICC.METHODS: From a prospectively maintained database, we performed cohort analysis. We identified 13 patients who underwent LT with explant pathology revealing HCC/CC or ICC. RESULTS: The observed recurrence rate post-LT was 31%(4/13) and overall survival was 85%, 51%, and 51% at 1, 3 and 5 years, respectively. Disease-free survival was 68%, 51%, and 41% at 1, 3 and 5 years, respectively. In our cohort, four patients would have qualified for exception points based on updated HCC Organ Procurement and Transplantation Network imaging guidelines. CONCLUSIONS: Lesions which lack complete imaging characteristics of HCC may warrant pre-LT biopsy to fully elucidate their pathology. Identified patients with early HCC/CC or ICC may benefit from LT if unresectable. Additionally, incorporating adjunctive perioperative therapies such as in the case of patients undergoing LT with hilar cholangiocarcinoma may improve outcomes but this warrants further investigation.Mohammed Elshamy Naftali Presser Abdulrahman Y Hammad Daniel J Firl Christopher Coppa John Fung Federico N Aucejo 2017Hepatobiliary & Pancreatic Diseases International2017,16,3:6
7Natural orifice translumenal surgery:Flexible platform review显示文摘Natural orifice translumenal surgery(NOTES) has garnished significant attention from surgeons and gastroenterologists,due to the fusion of flexible endoscopy and operative technique.Preliminary efforts suggest that NOTES holds potential for a less invasive approach with certain surgical conditions.Many of the hurdles encountered during the shift from open to laparoscopic surgery are now being revisited in the development of NOTES.Physician directed efforts,coupled with industry support,have brought about several NOTES specific devices and platforms to help address limitations with current instrumentation.This review addresses current flexible platforms and their attributes,advantages,disadvantages and limitations.Sohail N Shaikh Christopher C Thompson 2010World Journal of Gastrointestinal Surgery2010,2,6:5
8Varicella zoster meningitis complicating combined anti-tumor necrosis factor and corticosteroid therapy in Crohn's disease显示文摘Opportunistic viral infections are a well-recognized complication of anti-tumor necrosis factor (TNF) therapy for inflammatory bowel disease (IBD). Cases of severe or atypical varicella zoster virus infection, both primary and latent reactivation, have been described in association with immunosuppression of Crohn's disease (CD) patients. However, central nervous system varicella zoster virus infections have been rarely described, and there are no previous reports of varicella zoster virus meningitis associated with anti-TNF therapy among the CD population. Here, we present the case of a 40-year-old male with severe ileocecal-CD who developed a reactivation of dermatomal herpes zoster after treatment with prednisone and adalimumab. The reactivation presented as debilitating varicella zoster virus meningitis, which was not completely resolved despite aggressive antiviral therapy with prolonged intravenous acyclovir and subsequent oral valacyclovir. This is the first reported case of opportunistic central nervous system varicella zoster infection complicating anti-TNF therapy in the CD population. This paper also reviews the literature on varicella zoster virus infections of immunosuppressed IBD patients and the importance of vaccination prior to initiation of anti-TNF therapy.Christopher Ma Brennan Walters Richard N Fedorak 2013World Journal of Gastroenterology2013,19,21:5
9Living in a High Mountain Border Region:the Case of the'Bhotiyas'of the Indo-Chinese Border Region显示文摘This article introduces one of South Asia's most important border regions into academic discourse, namely, the Central Himalayan mountain rim separating India and the Tibetan Autonomous Region (People's Republic of China). What makes this border region so interesting is a tangled interplay of changing environmental, cultural, and political forms to which the local populations constantly have to adapt in order to make a living there. We focused on the so-called 'Bhotiyas' of Uttarakhand, former trans-Himalayan traders whose ethnicity and livelihood was traditionally associated with the Indo-Chinese border that was sealed as a result of the India-China war in 1962. Drawing on the work of borderland scholarship, we identified the key processes and developments that changed the perspective of this area. Competing political aspirations as well as the 'Bhotiyas' countervailing strategies were considered equally important for understanding local livelihoods and identities within the dynamics of a 'high mountain border region'. Through an exemplary analysis of historical differences of power in one 'Bhotiya' valley, we further explored the ways in which shifting socio-spatial constellations are creatively re-interpreted by the borderlanders.Christoph Bergmann Martin Gerwin Marcus Nüsser William S.Sax 2008Journal of Mountain Science2008,5,3:5
10Update on Cardiovascular Implantable Electronic Device Infections and Their Management: A Scientific Statement From the American Heart Association显示文摘Larry M. Baddour Andrew E. Epstein Christopher C. Erickson Bradley P. Knight Matthew E. Levison Peter B. Lockhart Frederick A. Masoudi Eric J. Okum Walter R. Wilson Lee B. Beerman Ann F. Bolger N A. Mark Estes Michael Gewitz Jane W. Newburger Eleanor B. S 2010Circulation2010,,3:4
11Gemcitabine-based or capecitabine-based chemoradiotherapy for locally advanced pancreatic cancer (SCALOP): a multicentre, randomised, phase 2 trial显示文摘Somnath Mukherjee Christopher N Hurt John Bridgewater Stephen Falk Sebastian Cummins Harpreet Wasan Tom Crosby Catherine Jephcott Rajarshi Roy Ganesh Radhakrishna Alec McDonald Ruby Ray George Joseph John Staffurth Ross A Abrams Gareth Griffiths Tim Maugh 2013Lancet Oncology2013,,4:4
12Fortuitously discovered liver lesions显示文摘The fortuitously discovered liver lesion is a common problem. Consensus might be expected in terms of its work-up, and yet there is none. This stems in part from the fact that there is no preventive campaign involving the early detection of liver tumors other than for patients with known liver cirrhosis and oncological patients. The work-up (detection and differential diagnosis) of liver tumors comprises theoretical considerations, history, physical examination, laboratory tests, standard ultrasound, Doppler ultrasound techniques, contrastenhanced ultrasound (CEUS), computed tomography and magnetic resonance imaging, as well as imageguided biopsy. CEUS techniques have proved to be the most pertinent method; these techniques became part of the clinical routine about 10 years ago in Europe and Asia and are used for a variety of indications in daily clinical practice. CEUS is in many cases the first and also decisive technical intervention for detecting and characterizing liver tumors. This development is reflected in many CEUS guidelines, e.g. , in the European Federation of Societies for Ultrasound in Medicine and Biology (EFSUMB) guidelines 2004, 2008 and 2012 as well as the recently published World Federation for Ultrasound in Medicine and Biology-EFSUMB guidelines 2012. This article sets out considerations for making a structured work-up of incidental liver tumors feasible.Christoph F Dietrich Malay Sharma Robert N Gibson Schreiber-Dietrich Christian Jenssen 2013World Journal of Gastroenterology2013,19,21:3
13成人高血压:NICE指南更新概要显示文摘高血压是全球发病率和死亡率的首位原因。超过25%的英国成年人患有高血压,其中有近30%患者的血压未得到控制。8月,英国国家健康与临床优选研究所(NICE)发表了更新的高血压诊疗指南。指南回顾了自2011年更新指南以来有关启动、监测及降压治疗内容,选择新的随机临床试验证据。更新指南的内容有所增加,纳人了合并2型糖尿病的患者,但对合并慢性肾脏疾病、心血管疾病或妊娠期高血压未给予推荐(译者注:这些部分有专业指南)。Rebecca J Boffa Margaret Constanti Christopher N Floyd Anthony S Wierzbicki 杨靓(译) 刘靖(校) 2020英国医学杂志中文版2020,23,4:3
14Gastro-duodenal disease in Africa: Literature review and clinical data from Accra, Ghana显示文摘Gastroduodenal disease(GDD)was initially thought to be uncommon in Africa.Amongst others,lack of access to optimal health infrastructure and suspicion of conventional medicine resulted in the reported prevalence of GDD being significantly lower than that in other areas of the world.Following the increasing availability of flexible upper gastro-intestinal endoscopy,it has now become apparent that GDD,especially peptic ulcer disease(PUD),is prevalent across the continent of Africa.Recognised risk factors for gastric cancer(GCA)include Helicobater pylori(H.pylori),diet,Epstein-Barr virus infection and industrial chemical exposure,while those for PUD are H.pylori,non-steroidal antiinflammatory drug(NSAID)-use,smoking and alcohol consumption.Of these,H.pylori is generally accepted to be causally related to the development of atrophic gastritis(AG),intestinal metaplasia(IM),PUD and distal GCA.Here,we perform a systematic review of the patterns of GDD across Africa obtained with endoscopy,and complement the analysis with new data obtained on premalignant gastric his-topathological lesions in Accra,Ghana which was compared with previous data from Maputo,Mozambique.As there is a general lack of structured cohort studies in Africa,we also considered endoscopy-based hospital or tertiary centre studies of symptomatic individuals.In Africa,there is considerable heterogeneity in the prevalence of PUD with no clear geographical patterns.Furthermore,there are differences in PUD within-country despite universally endemic H.pylori infection.PUD is not uncommon in Africa.Most of the African tertiary-centre studies had higher prevalence of PUD when compared with similar studies in western countries.An additional intriguing observation is a recent,ongoing decline in PUD in some African countries where H.pylori infection is still high.One possible reason for the high,sustained prevalence of PUD may be the significant use of NSAIDs in local or over-the-counter preparations.The prevalence of AG and IM,were similar or modestly higher over rates in western countries but lower than those seen in Asia..In our new data,sampling of 136 patients in Accra detected evidence of pre-malignant lesions(AG and/or IM)in 20 individuals(14.7%).Likewise,the prevalence of pre-malignant lesions,in a sample of 109 patients from Maputo,were 8.3%AG and 8.3%IM.While H.pylori is endemic in Africa,the observed prevalence for GCA is rather low.However,cancer data is drawn from country cancer registries that are not comprehensive due to considerable variation in the availability of efficient local cancer reporting systems,diagnostic health facilities and expertise.Validation of cases and their source as well as specificity of outcome definitions are not explicit in most studies further contributing to uncertainty about the precise incidence rates of GCA on the continent.We conclude that evidence is still lacking to support(or not)the African enigma theory due to inconsistencies in the data that indicate a particularly low incidence of GDD in African countries.Timothy N Archampong Richard H Asmah Cathy J Richards Vicki J Martin Christopher D Bayliss Edília Botao Leonor David Sandra Beleza Carla Carrilho 2019World Journal of Gastroenterology2019,25,26:3
15Deletion or underexpression of the Y-chromosome genes CDY2 and HSFY is associated with maturation arrest in American men with nonobstructive azoospermia显示文摘成熟拘捕(麻省) 指导致临床的 nonobstructive 精子缺乏的细菌房间开发的失败。尽管人的 Y 染色体的 azoospermic 因素(AZF ) 区域清楚地在一些情况中被含有,因此,远,很,很少对哪个个人, Y 染色体基因为完全的男细菌房间开发是重要的被知道。我们寻求了在可以在在美国人口与麻省联系的 nonobstructive 精子缺乏的致病被含有的 Y 染色体上识别单个基因。有 Y 染色体 microdeletions 的 132 个人的遗传型显型分析被执行。与麻省联系的编码蛋白质的基因被一张遗传型显型地图的视觉分析识别。与麻省联系的基因在 Y 染色体的一个片断以内作为那些基因被选择完全或部分删除了,总是与可恢复的阴囊的精子的麻省和缺席被联系。每个识别基因抄本的表示然后与自发的麻省和妨碍的精子缺乏从病人的分开的队在阴囊的织物与量的 RT-PCR 被测量。为有麻省的协会的十候选人基因在重叠的 Y 染色体的一个 8.4-Mb 片断以内被识别 AZFb 区域。CDY2 和 HSFY 是唯一的识别了在表示的差别在麻省和妨碍的精子缺乏队之间为被观察的基因。有妨碍的精子缺乏的人有 12 褶层 CDY2 抄本的更高相对的表示(1.33 ± 0.40 对 0.11 ± 0.04;P=0.0003 ) 并且 16 褶层 HSFY 抄本的更高的表示(0.78 ± 0.32 对 0.05 ± 0.02;P=0.0005 ) 与有麻省的人相比。CDY2 和 HSFY 也仅仅是在有 Sertoli 房间的病人的 underexpressed 症候群。这些数据显示 CDY2 和 HSFY 位于为精子成熟是重要的,并且是在与麻省从人导出的阴囊的织物的 underexpressed 的 Y 染色体的一个片断以内。这些观察建议在 CDY2 或 HSFY 表示的缺陷能在麻省的致病被含有。Peter J Stahl Anna N Mielnik Christopher E Barbieri Peter N Schlegel Darius A Paduch 2012Asian Journal of Andrology2012,14,5:3
16Prognostic relevance of minimal residual disease in colorectal cancer显示文摘Presence of occult minimal residual disease in patients with colorectal cancer(CRC)has a strong prognostic impact on survival.Minimal residual disease plays a major role in disease relapse and formation of metastases in CRC.Analysis of circulating tumor cells(CTC)in the blood is increasingly used in clinical practice for disease monitoring of CRC patients.In this review article the role of CTC,disseminated tumor cells(DTC)in the bone marrow and micrometastases and isolated tumor cells(ITC)in the lymph nodes will be discussed,including literature published until September 2013.Occult disease is a strong prognostic marker for patient survival in CRC and defined by the presence of CTC in the blood,DTC in the bone marrow and/or micrometastases and ITC in the lymph nodes.Minimal residual disease could be used in the future to identify patient groups at risk,who might benefit from individualized treatment options.Ulrich Bork Robert Grützmann Nuh N Rahbari Sebastian Schlch Marius Distler Christoph Reissfelder Moritz Koch Jürgen Weitz 2014World Journal of Gastroenterology2014,20,30:2
17Randomised controlled trial of combined spinal epidural vs. spinal anaesthesia for elective caesarean section: vasopressor requirements and cardiovascular changes显示文摘Alan JR Macfarlane Artur Pryn Kerry N Litchfield Fiona Bryden Steven Young Christopher Weir Elizabeth M McGrady 2009European Journal of Anaesthesiology2009,,1:2
18Serotonin type 3 receptor subunit gene polymorphisms associated with psychosomatic symptoms in irritable bowel syndrome:A multicenter retrospective study显示文摘BACKGROUND Single-nucleotide polymorphisms(SNPs)of the serotonin type 3 receptor subunit(HTR3)genes have been associated with psychosomatic symptoms,but it is not clear whether these associations exist in irritable bowel syndrome(IBS).AIM To assess the association of HTR3 polymorphisms with depressive,anxiety,and somatization symptoms in individuals with IBS.METHODS In this retrospective study,623 participants with IBS were recruited from five specialty centers in Germany,Sweden,the United States,the United Kingdom,and Ireland.Depressive,anxiety,and somatization symptoms and sociodemographic characteristics were collected.Four functional SNPs—HTR3A c.-42C>T,HTR3B c.386A>C,HTR3C c.489C>A,and HTR3E c.*76G>A—were genotyped and analyzed using the dominant and recessive models.We also performed separate analyses for sex and IBS subtypes.SNP scores were calculated as the number of minor alleles of the SNPs above.The impact of HTR3C c.489C>A was tested by radioligand-binding and calcium influx assays.RESULTS Depressive and anxiety symptoms significantly worsened with increasing numbers of minor HTR3C c.489C>A alleles in the dominant model(F_(depressive)=7.475,P_(depressive)=0.006;F_(anxiety)=6.535,P_(anxiety)=0.011).A higher SNP score(range 0-6)was linked to a worsened depressive symptoms score(F=7.710,P-linear trend=0.006)in IBS.The potential relevance of the HTR3C SNP was corroborated,showing changes in the expression level of 5-HT3AC variant receptors.CONCLUSION We have provided the first evidence that HTR3C c.489C>A is involved in depressive and anxiety symptoms in individuals with IBS.The SNP score indicated that an increasing number of minor alleles is linked to the worsening of depressive symptoms in IBS.Sabrina Berens Yuanjun Dong Nikola Fritz Jutta Walstab Mauro D'Amato Tenghao Zheng Verena Wahl Felix Boekstegers Justo Lorenzo Bermejo Cristina Martinez Stefanie Schmitteckert Egbert Clevers Felicitas Engel Annika Gauss Wolfgang Herzog Robin Spiller Miriam Goebel-Stengel Hubert Mönnikes Viola Andresen Frieling Thomas Jutta Keller Christian Pehl Christoph Stein-Thöringer Gerard Clarke Timothy G Dinan Eamonn M Quigley Gregory Sayuk Magnus Simrén Jonas Tesarz Gudrun Rappold Lukas van Oudenhove Rainer Schaefert Beate Niesler 2022World Journal of Gastroenterology2022,28,21:2
19Refractive surgery in children显示文摘Christopher M Fecarotta Marie Kim Barry N Wasserman 2010Current Opinion in Ophthalmology2010,,:2
20Colometer:A real-time quality feedback system for screening colonoscopy显示文摘AIM:To investigate the performance of a new software-based colonoscopy quality assessment system.METHODS:The software-based system employs a novel image processing algorithm which detects the levels of image clarity,withdrawal velocity,and level of the bowel preparation in a real-time fashion from live video signal.Threshold levels of image blurriness and the withdrawal velocity below which the visualization could be considered adequate have initially been determined arbitrarily by review of sample colonoscopy videos by two experienced endoscopists.Subsequently,an overall colonoscopy quality rating was computed based on the percentage of the withdrawal time with adequate visualization(scored 1-5;1,when the percentage was 1%-20%;2,when the percentage was 21%-40%,etc.).In order to test the proposed velocity and blurriness thresholds,screening colonoscopy withdrawal videos from a specialized ambulatory colon cancer screening center were collected,automatically processed and rated.Quality ratings on the withdrawal were compared to the insertion in the same patients.Then,3 experienced endoscopists reviewed the collected videos in a blinded fashion and rated the overall quality of each withdrawal(scored 1-5;1,poor;3,average;5,excellent) based on 3 major aspects:image quality,colon preparation,and withdrawal velocity.The automated quality ratings were compared to the averaged endoscopist quality ratings using Spearman correlation coefficient.RESULTS:Fourteen screening colonoscopies were assessed.Adenomatous polyps were detected in 4/14(29%) of the collected colonoscopy video samples.As a proof of concept,the Colometer software rated colonoscope withdrawal as having better visualization than the insertion in the 10 videos which did not have any polyps(average percent time with adequate visualization:79% ± 5% for withdrawal and 50% ± 14% for insertion,P < 0.01).Withdrawal times during which no polyps were removed ranged from 4-12 min.The median quality rating from the automated system and the reviewers was 3.45 [interquartile range(IQR),3.1-3.68] and 3.00(IQR,2.33-3.67) respectively for all colonoscopy video samples.The automated rating revealed a strong correlation with the reviewer's rating(ρ coefficient= 0.65,P = 0.01).There was good correlation of the automated overall quality rating and the mean endoscopist withdrawal speed rating(Spearman r coefficient= 0.59,P = 0.03).There was no correlation of automated overall quality rating with mean endoscopists image quality rating(Spearman r coefficient= 0.41,P = 0.15).CONCLUSION:The results from a novel automated real-time colonoscopy quality feedback system strongly agreed with the endoscopists' quality assessments.Further study is required to validate this approach.Dobromir Filip Xuexin Gao Leticia Angulo-Rodriguez Martin P Mintchev Shane M Devlin Alaa Rostom Wayne Rosen Christopher N Andrews 2012World Journal of Gastroenterology2012,18,32:2
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