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A novel predictor of unsustained return of spontaneous circulation in cardiac arrest patients through a combination of capnography and pulse oximetry: a multicenter observational study

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World Journal of Emergency Medicine 2024年第1期15卷 16-22页

作者： Jing Yang Hanqi Tang Shihuan Shao Feng Xu Yangyang Fu Shengyong Xu Chen Li Yan Li Yang Liu Joseph Harold Walline Huadong Zhu Yuguo Chen Xuezhong Yu Jun Xu Emergency Department State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Science and Peking Union Medical CollegeBeijing 100730China Emergency Department Peking University People’s HospitalBeijing 100044China Department of Emergency and Chest Pain Center Shandong Provincial Clinical Research Center for Emergency and Critical Care MedicineKey Laboratory of Emergency and Critical Care Medicine of Shandong ProvinceQilu Hospital of Shandong UniversityJinan 250012China Emergency Department Beijing Jishuitan HospitalBeijing 100035China Emergency Department Tianjin Medical University General HospitalTianjin 300052China Department of Emergency Medicine Penn State Health Milton S.Hershey Medical Center and Penn State College of MedicineHershey 17033USA

BACKGROUND:Unsustained return of spontaneous circulation(ROSC)is a critical barrier to survival in cardiac arrest *** study examined whether end-tidal carbon dioxide(ETCO_(2))and pulse oximetry photoplethysmogram(POP)parameters can be used to identify unsustained ***:We conducted a multicenter observational prospective cohort study of consecutive patients with cardiac arrest from 2013 to ***’general information,ETCO_(2),and POP parameters were collected and statistically ***:The included 105 ROSC episodes(from 80 cardiac arrest patients)comprised 51 sustained ROSC episodes and 54 unsustained ROSC *** 24-hour survival rate was significantly higher in the sustained ROSC group than in the unsustained ROSC group(29.2%vs.9.4%,P<0.05).The logistic regression analysis showed that the difference between after and before ROSC in ETCO_(2)(ΔETCO_(2))and the difference between after and before ROCS in area under the curve of POP(ΔAUCp)were independently associated with sustained ROSC(odds ratio[OR]=0.931,95%confi dence interval[95%CI]0.881-0.984,P=0.011 and OR=0.998,95%CI 0.997-0.999,P<0.001).The area under the receiver operating characteristic curve ofΔETCO_(2),ΔAUCp,and the combination of both to predict unsustained ROSC were 0.752(95%CI 0.660-0.844),0.883(95%CI 0.818-0.948),and 0.902(95%CI 0.842-0.962),***:Patients with unsustained ROSC have a poor *** combination ofΔETCO_(2) andΔAUCp showed signifi cant predictive value for unsustained ROSC.

关键词： Return of spontaneous circulation Pulse oximetry photoplethysmogram End-tidal carbon dioxide Cardiac arrest Cardiopulmonary resuscitation

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Regularity of Solutions of the Cahn-Hilliard Equation with Non-constant Mobility

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Acta Mathematica Sinica,English Series 2006年第4期22卷 1139-1150页

作者： Chang Chun LIU Yuan Wei QI Jing Xue YIN Department of mathematics Jilin University Changchun 130012 P. R. China Department of mathematics University of California Santa Barbara CA 93106 USA

In this paper, we study the regularity of solutions for two-dimensional Cahn-Hilliard equation with non-constant mobility. Basing on the L^p type estimates and Schauder type estimates, we prove the global existence of... 详细信息

关键词： Cahn-Hilliard equation regularity Schauder estimates

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AN ESTIMATE ON THE DISTRIBUTION AND MOMENTS OF THE LAST EXIT TIME OF AN ELLIPTIC DIFFUSION PROCESS

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Acta Mathematica Scientia 2006年第4期26卷 639-645页

作者：李波刘禄勤 School of mathematics and Statistics Huazhong Normal University Wuhan 430079China School of Mathematics and StatisticsWuhan UniversityWuhan 430072China School of mathematics and Statistics Wuhan University Wuhan 430072China

Let Ls be the last exit time from a compact set B of an elliptic diffusion process X. A moderate estimate for the distribution of Ls is obtained, and the sufficient and necessary condition for E^x（L^κB）〈∞ is pr... 详细信息

关键词： Last exit time moment transience distribution diffusion process

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ON HASEMAN BOUNDARY VALUE PROBLEM FOR A CLASS OF META-ANALYTIC FUNCTIONS

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Acta Mathematica Scientia 2011年第1期31卷 39-48页

作者：汪玉峰杜金元 School of mathematics and Statistics Wuhan University

In this article, Haseman boundary value problem for a class of meta-analytic functions is studied. The expression of solution and the condition of solvability for Haseman boundary value problem are obtained by changing the problem discussed into the equivalent Haseman boundary value problem of bi-analytic function. And the expression of solution and the condition of solvability depend on the canonical matrix.

关键词： Meta-analytic function bi-analytic function Haseman boundary value prob- lem canonical matrix

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Spacelike Hypersurfaces of Prescribed Gauss-Kronecker Curvature in Exterior Domains

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Acta Mathematica Sinica,English Series 2009年第3期25卷 491-502页

作者： Yong HUANGWuhan Huai Yu JIAN Ning SU Institute of Physics and mathematics Chinese Academy of Sciences Wuhan 430071 P. R. China Department of Mathematical Sciences Tsinghua University Beijing 100084 P. R. China nsu@math tsinghua edu. cn

In this paper, we prove an existence theorem for spacelike convex hypersurfaces of prescribed Gauss curvature in Minkowski space.

关键词： Gauss-Kronecker curvature Minkowski space Monge-Ampere type equation

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Optimized Local Trigonometric Bases with Nonuniform Partitions

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Acta Mathematica Sinica,English Series 2006年第4期22卷 1069-1084页

作者： Qiao Fang LIAN Yong Ge WANG Dun Yan YAN Department of mathematics Beijing Jiaotong University Beijing 100044 P. R. China Department of Applied mathematics Beijing University of Aeronautics and AstronauticsBeijing 100083 P. R. China Institute of mathematics Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100080 P. R. China School of Information Science and Engineering the Graduate School of the Chinese Academy of Sciences Beijing 100039 P. R. China

The authors provide optimized local trigonometric bases with nonuniform partitions which efficiently compress trigonometric functions. Numerical examples demonstrate that in many cases the proposed bases provide bette... 详细信息

关键词： Optimized local trigonometric bases Bell functions Nonuniform partitions

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An efficient block variant of robust structured multifrontal factorization method

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Chinese Physics B 2013年第8期22卷 225-232页

作者：左宪禹莫则尧谷同祥 School of Computer and Information Engineering Henan University Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics

Based on the two-dimensional three-temperature （2D3T） radiation diffusion equations and its discrete system, using the block diagonal structure of the three-temperature matrix, the reordering and symbolic decomposition parts of the RSMF method are replaced with corresponding block operation in order to improve the solution efficiency. We call this block form method block RSMF （in brief, BRSMF） method. The new BRSMF method not only makes the reordering and symbolic decomposition become more effective, but also keeps the cost of numerical factorization from increasing and ensures the precision of solution very well. The theoretical analysis of the computation complexity about the new BRSMF method shows that the solution efficiency about the BRSMF method is higher than the original RSMF method. The numerical experiments also show that the new BRSMF method is more effective than the original RSMF method.

关键词： HSS structure low-rank property multifrontal method two-dimensional three-temperature radia-tive diffusion equations

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Optimal error bound of restricted Monte Carlo integration on anisotropic Sobolev classes

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Progress in Natural Science:Materials International 2006年第6期16卷 588-593页

作者： GAO Wenhua, YE Peixin and WANG Hui (College of mathematics and System Sciences, Xinjiang University, Urumqi 830046, China School of Mathematical Sciences and LPMC, Nankai University, Tianjin 300071, China Department of mathematics, Ily Teachers' College, Yining 835000, China College of Science, Hehai University, Nanjing 210098, China) College of mathematics and System Sciences Xinjiang University Urumqi 830046 China School of Mathematical Sciences and LPMC Nankai University Tianjin 300071 China Department of mathematics Ily Teachers' College Yining 835000 China College of Science Hehai University Nanjing 210098 China

We study the restricted Monte Carlo integration error for anisotropic Sobolev classes. Results prove that with O(log2 n) random bits we have the optimal order for the n-th minimal Monte Carlo integration error with ar... 详细信息

关键词： Monte Carlo integration random bits anisotropic Sobolev classes.

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Integral Formula of Minkowski Type and New Characterization of the Wulff Shape

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Acta Mathematica Sinica,English Series 2008年第4期24卷 697-704页

作者： Yi Jun HE Hai Zhong LI Department of Mathematical Sciences Tsinghua University Beijing 100084 P. R. China School of Mathematical Sciences Shanxi University Taiyuan 030006 P. R. China

Given a positive function F on S^n which satisfies a convexity condition, we introduce the r-th anisotropic mean curvature Mr for hypersurfaces in R^n＋1 which is a generalization of the usual r-th mean curvature Hr. We get integral formulas of Minkowski type for compact hypersurfaces in R^n＋1. We give some new characterizations of the Wulff shape by the use of our integral formulas of Minkowski type, in case F=1 which reduces to some well-known results.

关键词： Wulff shape F-Weingarten operator mean curvature integral formula of Minkowski type anisotropic principal curvature r-th anisotropic

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Oscillation for a Class of Diffusive Hematopoiesis Model with Several Arguments

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Acta Mathematica Sinica,English Series 2012年第11期28卷 2345-2354页

作者： Xiao WANG Hao ZHANG Zhi Xiang LI Department of mathematics and System Science College of ScienceNational University of Defense Technology

By considering solution curve＇s or surface＇s composition of the functions of several variables and constructing the suitable lower-upper solution pair for the following special diffusive Hematopoiesis modelunder Neumann boundary condition, sufficient conditions are provided for the oscillation of the positive equilibrium for （0.1）. Moreover, these results extend or complement existing results.

关键词： Partial functional differential equations lower-upper solution pair oscillation

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