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Acetylsalicylic acid for metal stent in malignant distal common bile duct obstruction:A randomized controlled trial

Hepatobiliary & Pancreatic Diseases International 2022年第5期21卷 493-499页

作者： jin Ho Choi Kyong Joo Lee woo Hyun Paik Namyoung Park Jung Won Chun Sang Hyub Lee ji Kon Ryu yong-Tae Kim Department of Internal Medicine Liver Research InstituteSeoul National University College of MedicineSeoulKorea Department of Internal Medicine Yonsei University Wonju College of MedicineWonjuKorea

Background:Endoscopic biliary drainage is the treatment of choice for patients with malignant distal common bile duct ***-expandable metal stents have clinical advantages including an increased duration of patency that may be prolonged by acetylsalicylic acid(ASA)*** aim of this study was to investigate whether ASA had a positive effect on the patency of self-expandable metal stents compared with ***:This prospective,multicenter,double-blinded,and randomized placebo-controlled trial was conducted from October 2017 to May 2020 in *** who underwent palliative endoscopic biliary drainage with self-expandable metal stents for malignant distal bile duct obstruction were enrolled,and allocated to ASA treatment or *** study outcomes were the rate of stent dysfunction at 6 months,duration of stent patency,risk factors for stent dysfunction,and any adverse ***:Interim analysis included 24 and 28 patients in the ASA and placebo groups,*** was no significant difference between the ASA and placebo groups in stent dysfunction(25.0%vs.20.7%,P=0.761)or the duration of stent patency(150.97±10.55 vs.158.07±8.70 days,P=0.497).Six patients experienced suspected ASA-related adverse events,and there was one lethal ***:ASA did not prolong stent *** study was terminated early because of the possibility of serious adverse events related to ASA treatment of these patients receiving palliative care.

关键词： Endoscopic retrograde cholangiopancreatography Self expandable metallic stents Randomized controlled trial Acetylsalicylic acid

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Control Model of Bloom Dynamic Soft Reduction

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Journal of Iron and Steel Research International 2010年第9期17卷 31-35页

作者： CHEN yong ji Cheng ZHU Miao-yong WU Guo-rong Department of Material Research Panzhihua Iron and Steel Research Institute Panzhihua 617000 Sichuan China School of Materials and Metallurgy Northeastern University Shenyang 110004 Liaoning China

There are significant effects of process parameters on internal qualities of bloom, and these process parameters are as follows. position and reduction amount, reduction distribution, reduction rate, and so on. Developing a control model is the key to apply soft reduction technology successfully. As the research object, 360 mm ×450 mm bloom caster in PISCO （Panzhihua Iron and Steel Co. ） has been studied, and the research method for control model of dynamic soft reduction has been proposed. On the basis of solidification and heat transfer model, the position of soft reduction and reduction distribution of each frame are determined according to the bloom temperature distribution and solid fraction in bloom center calculated. Production practice shows that the ratio of center porosity which is less than or equal to 1.0, increased to 97.27%, ratio of central segregation which is less than or equal to 0.5, increased to 80.91%, and ratio of central carbon segregation index which is more than or equal to 1.10, decreased to 4% with the applying model of dynamic soft reduction.

关键词： bloom continuous casting dynamic soft reduction control model center porosity central segregation

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Revision of bilateral self-expandable metallic stents placed using the stent-in-stent technique for malignant hilar biliary obstruction

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Hepatobiliary & Pancreatic Diseases International 2018年第5期17卷 437-442页

作者： Jun Hyuk Son Hee Seung Lee Sang Hyub Lee Seungmin Bang jinwoo Kang woo Hyun Paik ji Kon Ryu yong-Tae Kim Department of Internal Medicine and Liver Research Institute Seoul National University HospitalSeoul National University College of MedicineSeoulKorea Department of Internal Medicine Inje University Ilsan Paik HospitalGoyangKorea Department of Internal Medicine Institute of GastroenterologyYonsei University College of MedicineSeoulKorea Department of Gastroenterology and Hepatology SMG-SNU Boramae Medical CenterSeoulKorea

Background: Endoscopic biliary decompression using bilateral self-expandable metallic stent(SEMS) placed using the stent-in-stent(SIS) technique is considered favorable for unresectable malignant hilar biliary obstruction(MHBO). However, occlusion of the bilateral SIS placement is frequent and revision can be challenging. This study was performed to investigate the efficacy, the long-term patency and the appropriate approach for revision of occluded bilateral SIS placement in unresectable MHBO. Methods: From January 2011 to July 2016, thirty-eight patients with unresectable MHBO underwent revision of occluded bilateral SIS placement. Clinical data including success rates and patency of revision, were retrospectively analyzed. Results: The technical success rate of revision was 76.3%. The clinical success rate of revision was 51.7% and mean patency of revision was 49.1 days. No significant predictive factor for clinical failure of revision was observed. The cell size of SEMS was not found to have significant effects on clinical success rates or revision patency. Conclusions: Revision of occluded bilateral SIS placement for MHBO showed fair patency and clinical success rate. Revision method and cell size of SEMS were not found to influence clinical outcomes.

关键词： Malignant hilar biliary obstruction Self-expandable metallic stent Stent-in-stent Revision

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Interventional urethral balloon dilatation before endoscopic visual internal urethrotomy for post-traumatic bulbous urethral stricture:A case report

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World Journal of Clinical Cases 2022年第34期10卷 12787-12792页

作者： ji yong Ha Mu Sook Lee Department of Urology Keimyung University Dongsan HospitalKeimyung University School of MedicineDaegu 42601South Korea Department of Radiology Keimyung University Dongsan HospitalKeimyung University School of MedicineDaegu 42601South Korea

BACKGROUND While several treatment options are available for pediatric urethral strictures,the appropriate treatment must be based on several *** endoscopic visual internal urethrotomy(EVIU)could be a first-line treatment option for short pediatric urethral strictures,it is not feasible if the urethroscope cannot pass through the stricture ***,we present a pediatric case of severe posttraumatic bulbous urethral stricture that was successfully treated by EVIU after securing the urethral route via interventional balloon *** SUMMARY A 12-year-old boy presented at our outpatient clinic with the inability to *** had sustained a straddle injury three months *** post-void residual urine volume was 644 mL,and retrograde urethrography confirmed severe stricture of the bulbous *** was planned;however,the first attempt to treat the stricture failed because the urethroscope could not pass through the stricture *** urethral route was subsequently secured via balloon dilatation of the stricture,which was performed in collaboration with specialists from the department of interventional *** urethroscope was then able to pass,and the repeat EVIU was *** Interventional urethral balloon dilatation before EVIU may help secure the urethral route in the treatment of pediatric urethral strictures.

关键词： Urethral stricture Endoscopic visual internal urethrotomy Urethroplasty Urethral balloon dilatation Interventional radiology Case report

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Applications of transition-metal sulfides in the cathodes of lithium-sulfur batteries

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Tungsten 2020年第2期2卷 134-146页

作者： jing‑Han Zuo yong‑ji Gong School of Materials Science and Engineering Beihang UniversityBeijing 100191China

Lithium-sulfur(Li-S)batteries are considered as one of the most promising candidates for next-generation energy storage systems with high energy density and reliable ***,the commercial applications of lithium-sulfur batteries is hindered by several shortcomings like the poor conductivity of sulfur and its reaction products,and the loss of active materials owing to the diffusion of lithium polysulfides(LiPSs)into the ***,the effective restraining of the LiPSs and the promotion of the sluggish conversion are highly demanded to fulfill the potential of lithium-sulfur ***,we summarize the applications of transition-metal sulfides(TMSs)in the cathodes over recent years and demonstrate the unique advantages they possess to realize reliable long-life lithium-sulfur batteries.

关键词： Lithium–sulfur battery Transition metal sulfides Polysulfide adsorption Electrode conductivity Electrocatalysis

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Laparoscopic gastric bypass vs sleeve gastrectomy in obese Korean patients

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World Journal of Gastroenterology 2015年第44期21卷 12612-12619页

作者： ji Yeon Park yong jin Kim Department of Surgery Soonchunhyang University Seoul Hospital Department of Surgery National Cancer Center Goyang-si

AIM: To compare the mid-term outcomes of lapa-roscopic sleeve gastrectomy(LSG) and laparoscopic Roux-en-Y gastric bypass(LRYGB) in obese Korean patients. METHODS: All consecutive patients who underwent either LSG or LRYGB with primary to treat morbid obesity between January 2011 and December 2012 were retrospectively reviewed. Patients with a body mass index(BMI) ≥ 30 kg/m2 with inadequately controlled obesity-related comorbidities(e.g., diabetes, obstructive sleep apnea, hypertension, or obesityrelated arthropathy) or BMI ≥ 35 kg/m2 were considered for bariatric surgery according to the International Federation for the Surgery of Obesity-Asia Pacific Chapter Consensus statements in 2011. The decision regarding the procedure type was made on an individual basis following extensive discussion with the patient about the specific risks associated with each procedure. All operative procedures were performed laparoscopically by a single surgeon experienced in upper gastrointestinal surgeries. Baseline demographics, perioperative surgical outcomes, and postoperative anthropometric data from a prospectively established database were thoroughly reviewed and compared between the two surgical ***: One hundred four patients underwent LSG, and 236 underwent LRYGB. Preoperative BMI in the LSG group was significantly higher than that of the LRYGB group(38.6 kg/m2 vs 37.2 kg/m2, P = 0.024). Patients with diabetes were more prevalent in the LRYGB group(18.3% vs 35.6%, P = 0.001). Operating time and hospital stay were significantly shorter in the LSG group compared with the LRYGB group(100 min vs 130 min, P < 0.001; 1 d vs 2 d, P = 0.003), but the incidence of perioperative complications was similar between the groups(P = 0.351). The mean percentage of excess weight loss(%EWL) was 71.2% for LRYGB, while it was 63.5% for LSG, at mean follow-up periods of 18.0 and 21.0 mo, respectively(P = 0.073). The %EWL at 1, 3, 6, 12, 18, 24, and 36 mo was equivalentbetween the grou

关键词： Morbid obesity Bariatric surgery Rouxen-Y gastric

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Simple transscleral fixation of IOL technique without tying up haptics

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International Journal of Ophthalmology(English edition) 2020年第7期13卷 1152-1155页

作者： Junsung Lee Jae-yong Jang yong-Sok ji Department of Ophthalmology Chonnam National University Medical School and HospitalGwangju 61469Republic of Korea Parangsae Eye Clinic Gwangju 61489Republic of Korea Bora Eye Hospital Gwangju 61964Republic of Korea

AIM: To introduce a novel technique for transscleral fixation of the posterior chamber intraocular lens(PC-IOL) that requires no sutures on the IOL ***: Instead of suturing polypropylene onto the IOL haptics, the method simply winds the thread on the haptics. Fifteen eyes of 15 patients underwent this technique and were followed up for more than 18 mo. Surgical outcomes and post-operative complications were evaluated and compared with those of the conventional transscleral fixation ***: Postoperative cylinder was significantly lower in the thread winding group than in the conventional transscleral fixation method group(-1.02±0.46 diopters vs-1.57±0.77 diopters;P=0.01). Further, no postoperative complications, such as optic capture, IOL dislocation, and hyphema, were detected in the thread winding ***: We believe that our thread winding technique is better than previously reported methods because it is simple, mechanically stable, and free from suture-related complications.

关键词： aphakia transscleral fixation pars plana vitrectomy intraocular lens implantation

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Inorganic shell nanostructures to enhance performance and stability of metal nanoparticles in catalytic applications

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Rare Metals 2020年第7期39卷 767-783页

作者： Inhee Choi Hyeon Kyeong Lee Gyoung woo Lee jiyull Kim ji Bong Joo Department of Life Science University of SeoulSeoul 02504Republic of Korea Division of Chemical Engineering Konkuk UniversitySeoul 05029Republic of Korea

In this article,we review the recent progress and our research activity on the synthesis of inorganic shell nanostructures to enhance the catalytic performance and stability of metal nanoparticles in catalytic ***,we introduce general synthetic strategies for the fabrication of inorganic nanoscale shell layers,including template-assisted sol-gel coating,hydrothermal(or solvothermal)synthesis and the self-templating *** also discuss recent examples of metal nanoparticles(NPs)with nanoscale shell layers,namely core-shell,yolk-shell and multiple NPs-embedded nanoscale *** then discuss the performance and stability of metal particles in practical catalytic ***,we conclude with a summary and perspective on the further progress of inorganic nanostructure with nanoscale shell layers for catalytic applications.

关键词： Nanostructures Inorganic shell Metal nanoparticle Stabilization Performance enhancement Catalyst

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Mechanical characteristics of soil-rock mixtures containing macropore structure based on 3D modeling technology

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Journal of Mountain Science 2020年第9期17卷 2224-2240页

作者： LIU yong SUN Shao-rui WEI ji-hong SONG jing-lei YU yong-xiang HE Wei ZHANG ji-xing School of Earth Science and Engineering Hohai UniversityNanjing 211100China jiangsu Province Geological Survey Institute Nanjing 210018China

Soil-rock mixtures containing macropore(SRMCM)is a kind of geological material with special mechanical *** in the project area of Lenggu hydropower station on the Yalong River,Sichuan Province,China,there is an extremely unstable Mahe talus slide with a total volume of nearly160 million cubic meters,which is mainly composed of *** study on the mechanical properties of SRMCM is of great significance for the engineering construction and safe *** this paper,laboratory tests and discrete element numerical tests based on three-dimensional scanning technology were conducted to study the influence of stone content,stone size,and the angle of the macropore structure on shear characteristics of *** failure mechanism of SRMCM was discussed from a microscopic *** work explains the internal mechanism of the influence of stone content,stone size,and the angle of the macropore structure on the strength of SRMCM through the microscopic level of stone rotation,force chain distribution,and crack *** the macropore structure that intersects with the preset shear plane at a large angle could act as a skeleton-like support to resist the shear force,the fracture of the weak cemented surface of soil and stone in the macropore structure is an important cause of SRMCM destruction.

关键词： Soil rock mixtures Macropore structure Mechanical characteristics Discrete element method Shear band

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Multi-sensing paradigm based urban air quality monitoring and hazardous gas source analyzing:a review

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Journal of Safety Science and Resilience 2021年第3期2卷 131-145页

作者： Zhengqiu Zhu Bin Chen yong Zhao Yatai ji College of Systems Engineering National University of Defense Technology(NUDT)410073109 Deya RoadKaifu DistrictChangsha CityHunan provinceChina Research Group of Multi-scale Networked Systems Informatics InstituteUniversity of Amsterdam(UvA)Science Park 904P.O.Box 943231096 XH AmsterdamNetherlands

Effectively monitoring urban air quality,and analyzing the source terms of the main atmospheric pollutants is important for public authorities to take air quality management *** works,such as long-term obser-vations by monitoring stations,cannot provide customized data services and in-time emergency response under urgent situations(gas leakage incidents).Therefore,we first review the up-to-date approaches(often machine learning and optimization methods)with respect to urban air quality monitoring and hazardous gas source *** bridge the gap between present solutions and practical requirements,we design a conceptual framework,namely MAsmed(Multi-Agents for sensing,monitoring,estimating and determining),to provide fine-grained concentration maps,customized data services,and on-demand emergency *** this framework,we leverage the hybrid design of wireless sensor networks(WSNs)and mobile crowdsensing(MCS)to sense urban air quality and relevant data(*** data,meteorological data,etc.);Using the sensed data,we can create a fine-grained air quality map for the authorities and relevant stakeholders,and provide on-demand source term estimation and source searching methods to estimate,seek,and determine the sources,thereby aiding decision-makers in emergency response(*** evacuation).In this paper,we also identify several potential opportunities for future research.

关键词： Urban air quality monitoring and source analyzing system MAsmed framework Wireless sensor networks Mobile crowdsensing Air quality management

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