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Pancreatic stent improves the success rate of needle-knife papillotomy in patients with difficult biliary cannulation

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World Journal of Gastroenterology 2025年第1期31卷 58-67页

作者： Mu-Hsien Lee cheng-hui Lin Chi-Huan Wu Yung-Kuan Tsou Kai-Feng Sung Sheng-Fu Wang Nai-Jen Liu Department of Gastroenterology and Hepatology Chang Gung Memorial Hospital and Chang Gung University College of MedicineTaoyuan 33305Taiwan School of Medicine Chang Gung UniversityTaoyuan 33305Taiwan

BACKGROUND Needle-knife precut papillotomy(NKP)is typically performed ***,it remains unclear whether pancreatic stent(PS)placement can improve the outcomes of *** To explore whether PS placement improves the success rate of NKP in patients with difficult biliary *** This single-center retrospective study included 190 patients who underwent NKP between January 2017 and December 2021 after failed conventional biliary *** cases with incidental pancreatic duct cannulation during conventional biliary cannulation,the decision for pre-NKP PS placement was made at the endoscopist's *** primary outcome was the difference in the NKP success rate between patients with and without PS placement;the secondary outcome was the adverse event *** Among the 190 participants,82 received pre-NKP PS(PS-NKP group)whereas 108 did not[freehand or freehand NKP(FH-NKP)group].Post-NKP selective biliary cannulation was successful in 167(87.9%)patients,and the PS-NKP had a significantly higher success rate than the FH-NKP group(93.9%vs 83.3%,P=0.027).The overall adverse event rates were 7.3%and 11.1%in the PS-NKP and FH-NKP groups,respectively(P=0.493).A periampullary diverticulum(PAD)and significant intraoperative bleeding during NKP were independently associated with NKP failure;however,a pre-NKP PS was the only predictor of NKP *** the 44 participants with PADs,the PS-NKP group had a non-significantly higher NKP success rate than the FH-NKP group(87.5%and 65%,respectively;P=0.076).CONCLUSION PS significantly improved the success rate of NKP in patients with difficult biliary cannulation.

关键词： Difficult biliary cannulation Endoscopic retrograde cholangiopancreatography Needle-knife papillotomy Pancreatic stent Selective biliary cannulation

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Densification of MXene films by sequential bridging

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National Science Review 2022年第1期9卷 10-11页

作者： hui-Ming cheng Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenzhen Institute of Advanced Technology Chinese Academy of Sciences

Voids are an essential scientific issue when it comes to traditional composite materials, because they greatly degrade the laer’s properties and usually cause catastrophic failure [1].

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A bioinspired strategy for assembling graphene oxide sheets into high-performance graphene films

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Science China Chemistry 2018年第12期61卷 1475-1476页

作者： hui-Ming cheng Tsinghua-Berkeley Shenzhen Institute Tsinghua University Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences

Since 2004,graphene has attracted intense attention from the scientific and industrial communities due to its extraordinary properties,such as ultrahigh strength and remarkable electrical *** production of high-quality gra- phene materials can be achieved by chemical vapor deposition and chemical exfoliation,and their applications have been widely explored [1-3].

关键词： bioinspired strategy assembling graphene oxide sheets graphene films

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The Blowup Mechanism of Small Data Solutions for the Quasilinear Wave Equations in Three Space Dimensions

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Acta Mathematica Sinica,English Series 2001年第1期17卷 35-76页

作者： hui cheng YIN Department of Mathematics. Nanjing University Institute of Mathematical Science Chinese University of HongKong

For a class of three-dimensional quasilinear wave equations with small initial data, we give a complete asymptotic expansion of the lifespan of classical solutions, that is, we solve a conjecture posed by John and H rmander. As an application of our result, we show that the solution of three- dimensional isentropic compressible Euler equations with irrotational initial data which are a small perturbation from a constant state will develop singularity in the first-order derivatives in finite time while the solution itself is continuous. Furthermore, for this special case, we also solve a conjecture of Alinhac.

关键词： Lifespan Blowup system Nash--Moser method Commutator method

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High-quality graphene films produced by freezestretching alignment

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Science China Materials 2021年第5期64卷 1302-1303页

作者： hui-Ming cheng Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Monolayer graphene has the highest tensile strength,Young’s modulus, and electrical conductivity of known materials, and it is expected to be used in aerospace,automobiles, flexible electronics, etc. [1]. However, the extraordinary properties of graphene are on the molecular level and have not been realized when assembled into macroscopic materials.

关键词： stretching modulus conductivity

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Two-dimensional ambipolar van der Waals heterostructures enabling in-sensor computing for high-accuracy image recognition

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Science China Materials 2022年第9期65卷 2611-2612页

作者： hui-Ming cheng Faculty of Materials Science and Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

A traditional image recognition system is separately composed of a photodetector and a processing *** photodetector first detects a target light signal,then converts the detected light signal to an electrical signal,a... 详细信息

关键词： computing image system

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Global Existence of a Shock for the Supersonic Flow Past a Curved Wedge

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Acta Mathematica Sinica,English Series 2006年第5期22卷 1425-1432页

作者： hui cheng YIN Department of Mathematics Nanjing University Nanjing 210093 P. R. China

This note is devoted to the study of the global existence of a shock wave for the supersonic flow past a curved wedge. When the curved wedge is a small perturbation of a straight wedge and the angle of the wedge is le... 详细信息

关键词： potential equation shock wave wedge global existence

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Experimental investigation on pressure-buildup characteristics of a water lump immerged in a molten lead pool

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Nuclear Science and Techniques 2023年第3期34卷 25-39页

作者： Zi-Jian Deng Song-Bai cheng hui cheng Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China

Motivated to understand the pressure-buildup characteristics in a circumstance of a water droplet immerged inside a heavy liquid metal pool,which is a key phenomenon during a Steam Generator Tube Rupture accident of Lead-cooled Fast Reactor,many experiments have been conducted by injecting water lumps into a molten lead pool at Sun Yat-sen *** order to deepen the understanding of the influence of melt material,this lead experiment was compared with a Lead-Bismuth-Eutectic(LBE)experiment in the *** both experiments,a steam explosion occurred in a small part of the experi-mental runs,which generally leads to strengthened pressure *** the non-explosion experimental cases,the impact of all parameters employed in lead experiments(i.e.,water lump volume,water lump shape,molten pool depth,and temperature of water and melt)on the pressure buildup is non-negligible and similar to that in our previous experiments using ***,limited pressure buildup with an increase in water lump volume was also observed.A slightly more violent pressure buildup tends to appear in the lead experiments than in the LBE experiments under the same experimental conditions,which may be due to the higher thermal conductivity of lead than of *** a few experimental runs with a relatively low melt temperature close to the melting point of lead,local solidification of liquid lead was observed,restricting pressure *** the lead and LBE experiments,the calculated melt kinetic energy conversion efficiencyηhas a relatively small value(not exceeding 1.6%),and theηvalues have an overall positive correlation with the impulse on the molten pool.

关键词： Lead-cooled fast reactor Steam generator tube rupture accident Pressure-buildup characteristics Experimental study Melt material

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New paradigms on hematopoietic stem cell differentiation

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Protein & Cell 2020年第1期11卷 34-44页

作者： hui cheng Zhaofeng Zheng Tao cheng State Key Laboratory of Experimental Hematology Chinese Academy of Medical Sciences and Peking Union Medical CollegeTianjin 300020China Institute of Hematology and Blood Disease Hospital Chinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina Center for Stem Cell Medicine Chinese Academy of Medical SciencesTianjinChina Department of Stem Cell and Regenerative Medicine Peking Union Medical CollegeTianjinChina

Ever since hematopoietic stem cells(HSCs)were first identified half a century ago,their differentiation roadmap has been extensively *** classical model of hematopoiesis has long held as a dogma that HSCs reside at the top of a hierarchy in which HSCs possess self-renewal capacity and can progressively give rise to all blood lineage ***,over the past several years,with advances in single cell technologies,this developmental scheme has been *** this review,we discuss the evidence supporting heterogeneity within HSC and progenitor populations as well as the hierarchical models revised by novel approaches mainly in mouse *** evolving views provide further understanding of hematopoiesis and highlight the complexity of hematopoietic differentiation.

关键词： hematopoietic stem cell hierarchy heterogeneity differentiation

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Metre-size single-crystal graphene becomes a reality

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Science Bulletin 2017年第15期62卷 1039-1040页

作者： hui-Ming cheng Tsinghua-Berkeley Shenzhen Institute Tsinghua University Shenzhen 518055 China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Center of Excellence in Environmental Studies (CEES) King Abdulaziz University Jeddah 21589 Saudi Arabia

*** Liu of Peking University,a well-known graphene researcher and also one of the authors for the work[1]highlighted here,has always said,‘‘Fabrication determines the future'.I *** growth of large-area high-quality ... 详细信息

关键词：石墨大规模生产铜基材料单晶化学气相沉积 Ni合金北京大学器件应用

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