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Evidence-based approach to providing informed consent for hip fracture surgery during the COVID-19 era

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World Journal of Orthopedics 2021年第6期12卷 386-394页

作者： Rory Cuthbert David Ferguson Babar Kayani Saeef Haque Aoun Ali Asif Parkar Peter Bates krishna vemulapalli Department of Trauma&Orthopaedic Surgery Queen's Hospital-RomfordLondon RM70AGUnited Kingdom Department of Trauma&Orthopaedic Surgery Royal London HospitalLondon E11FRUnited Kingdom

BACKGROUND Hip fractures are the most common reason for inpatient orthopaedic trauma *** surgical intervention for hip fractures has remained a clinical priority throughout the coronavirus disease 2019(COVID-19)*** this,there is a paucity of clinical guidance addressing the informed consent process for hip fracture surgery in COVID-19 positive *** is of paramount medicolegal importance in a high-risk patient *** To quantify the additional perioperative risks for COVID-19 positive patients undergoing hip fracture surgery and provide clinicians with an evidence-based framework to establish an informed consent *** Two hundred and fifty nine consecutive patients undergoing surgical intervention for hip fractures in four hospitals in the United Kingdom were recruited.51 patients were confirmed positive for *** outcomes were analyzed over a 30-d postoperative ***-19 positive and COVID-19 negative patients were compared after adjustment for confounding *** COVID-19 positive patients had more intensive care admissions(27%vs 5%,P<0.001),longer inpatient stays(median 23 d vs 9 d,P<0.001)and a higher 30-d mortality(29%vs 10%,P=0.001)than COVID-19 negative *** complications were evident in 74.5%of COVID-19 positive patients.35.3%of COVID-19 positive patients suffered postoperative lower respiratory tract infections with 13.7%developing acute respiratory distress syndrome(ARDS)and 9.8%experiencing symptomatic thromboembolic *** The COVID-19 pandemic has created uncertainty in the medical community worldwide and poses unique challenges in providing informed consent for ***-19 positive patients undergoing hip fracture surgery should be consented for the additional risk of postoperative complications(including lower respiratory tract infection,ARDS,deep vein thrombosis and pulmonary embolism),increased requirement for intensive care admission,lo

关键词： COVID-19 Hip fractures Mortality Morbidity Outcome assessment Informed consent

Invitation to physical chemistry

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Effective spin dynamics of spin-orbit coupled matter-wave solitons in optical lattices

2010年

作者： Gopala krishna vemulapalli.

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Communications in Theoretical Physics 2025年第1期77卷 172-178页

作者： Kajal krishna Dey Golam Ali Sekh Department of Physics Banwarilal Bhalotia CollegeAsansol-713303West BengalIndia Department of Physics Kazi Nazrul UniversityAsansol-713340West BengalIndia

We consider matter-wave solitons in spin-orbit coupled Bose-Einstein condensates embedded in an optical lattice and study the dynamics of the soliton within the framework of Gross-Pitaevskii *** express spin components of the soliton pair in terms of nonlinear Bloch equations and investigate the effective spin *** is seen that the effective magnetic field that appears in the Bloch equation is affected by optical lattices,and thus the optical lattice influences the precessional frequency of the spin *** make use of numerical approaches to investigate the dynamical behavior of density profiles and center-of-mass of the soliton pair in the presence of the optical *** is shown that the spin density is periodically varying due to flipping of spinors between the two *** amplitude of spin-flipping oscillation increases with lattice *** find that the system can also exhibit interesting nonlinear behavior for chosen values of *** present a fixed point analysis to study the effects of optical lattices on the nonlinear dynamics of the spin *** is seen that the optical lattice can act as a control parameter to change the dynamical behavior of the spin components from periodic to chaotic.

关键词： spin-orbit coupled Bose-Einstein condensates effective spin dynamics regular and chaotic dynamics

Relevance of epidemiology data in trauma management

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World Journal of Clinical Cases 2025年第9期13卷 65-67页

作者： krishna Kumar Govindarajan Department of Pediatric Surgery Jawaharlal Institute of Postgraduate Medical Education and ResearchPuducherry 605006India

Trauma is a major cause of morbidity and mortality across the globe accounting for significant health *** of trauma care revolves round prevention,planning and execution of safety *** of the actual data regarding the type of trauma,affected age group,timings of trauma occurrence,involved part of the body constitute the initial steps in the building of the composite overview of the epidemiology of *** succession,would be the measures directed towards avoidance of trauma and capacity building of trauma center.

关键词： Trauma Epidemiology Injury Prevention Triage Registry Artificial Intelligence

Experimental study on microstructural and corrosion behaviors of friction stir processed steel with CoCrFeCuTi HEA reinforcement and effect of annealing

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Science China(Technological Sciences) 2025年第1期68卷 229-246页

作者： S.Aravind krishna N.RADHIKA Alokesh PRAMANIK N.JEYAPRAKASH Department of Mechanical Engineering Amrita School of EngineeringAmrita Vishwa VidyapeethamCoimbatore 641112India School of Civil and Mechanical Engineering Curtin UniversityBentley WA 6102Australia School of Mechanical and Electrical Engineering China University of Mining and TechnologyXuzhou 221116China

The ability to perform against extreme corrosion environments in stainless steel depreciates under challenging conditions in industrial *** can be resolved by employing surface modification techniques to modify the surface with the required *** present study investigates the outcomes of friction stir processing of SS304 with CoCrFeCuTi high entropy alloy(HEA)as reinforcement and the property enhancements *** synthesized CoCrFeCuTi HEA exhibited irregular fragments with 17μm mean particle size and body centred cubic(BCC)*** microstructure of the processed surface revealed ultra-refined grains with a uniform distribution of HEA *** microstructures of the samples annealed at 400℃,550℃,700℃and 850℃for 2 h also showed significant grain growth and grain *** processed sample with HEA reinforcement annealed at 700℃exhibited enhanced microhardness and tensile strength by 63%and 0.88 times than that of the processed sample with HEA *** subsequent electrochemical corrosion test displayed better corrosion resistance for the HEA-processed and annealed *** corrosion tests at 900℃showcased excellent resistance for the HEA processed and annealed samples by 14.92%,12.75%,and 14.83%against the samples pre-annealed under three different salt mixtures,and the corroded surface was analyzed.

关键词： high entropy alloys friction stir processing annealing grain refinement corrosion resistance

SEM Investigation of the Microstructure of Oxygen-Deficient Ca2FeGaO6-δ

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Journal of Materials Science and Chemical Engineering 2025年第1期13卷 1-6页

作者： Ariella Fogel Mandy Guinn Ram krishna Hona Environmental Science Department United Tribes Technical College Bismarck USA

This study presents a detailed investigation of the microstructure of the oxygen-deficient perovskite material Ca2FeGaO6-δ using Scanning Electron Microscopy (SEM). The material exhibits significant porosity and irregular grain morphology, with variations in grain size and growth. Unlike conventional perovskite structures, Ca2FeGaO6-δ shows non-uniform grain development, which can be attributed to the presence of oxygen vacancies (δ). SEM analysis reveals that the irregularities in grain size and shape, coupled with the porous nature of the material, are likely to influence its functional properties. These findings provide valuable insights into the structural features of Ca2FeGaO6-δ, offering a foundation for understanding its potential applications in catalysis, sensors, and other technologies. The study highlights the critical role of microstructural characteristics in determining the material’s performance.

关键词： XRD Solid-State Reaction Perovskite Oxides Oxygen Deficiency SEM

Collaborative actuation of liquid crystal elastomer unit cells as a function design platform

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Science China Materials 2025年第1期68卷 236-243页

作者： Jinyu Wang Hari krishna Bisoyi Yinliang Huang Yiyi Xu Xinfang Zhang Ben Fan Tao Yang Zhiyang Liu Shuai Huang Quan Li Institute of Advanced Materials and School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China Materials Science Graduate Program Kent State UniversityKentOH 44242US

As future soft robotic devices necessitate a level of complexity surpassing current standards,a new design approach is needed that integrates multiple systems necessary to synchronize the motions of soft actuators and the response of signals,thereby enhancing the intelligence of flexible ***,we propose a liquid crystal elastomer unit cell-based platform that organizes the cells in a group to create expandable *** unit cell behaves like a flexible module that can expand biaxially into a specific,stable,and controllable *** the unit cells in different manners results in an adaptable soft grasper,a half-adder for information processing,and a tunable phononic *** implies a high level of reconfigurability and scalability in both structures and functions by elegantly reassembling the unit *** design strategy has the potential to integrate multiple functions that traditional soft actuators cannot accommodate,providing a platform for developing intelligent soft robotics.

关键词： liquid crystal elastomer light-responsive material smart material soft actuator

Comparative efficacy of hyperbaric bupivacaine vs hyperbaric ropivacaine in spinal anesthesia for cesarean section:A metaanalysis

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World Journal of Methodology 2025年第2期15卷 154-165页

作者： Rishi Anand Deb Sanjay Nag Roushan Patel Prashant Sharma Vamsi krishna Uppalapati Umesh Kumar Singh Department of Anaesthesiology Tata Main HospitalJamshedpur 831001JhārkhandIndia

BACKGROUND Intrathecal bupivacaine is the traditional anesthetic drug used in spinal anesthesia for caesarean sections(CSs),but ropivacaine has emerged as a potential *** meta-analysis compares the efficacy and safety of intrathecal hyper-baric bupivacaine vs hyperbaric ropivacaine for cesarean *** To systematically evaluate and compare the efficacy and safety of intrathecal hyperbaric bupivacaine and hyperbaric ropivacaine for spinal anesthesia in *** A thorough search of electronic databases was carried out to find pertinent randomized controlled trials(RCTs)comparing intrathecal hyperbaric ropi-vacaine and hyperbaric bupivacaine during ***,Cochrane database,Google Scholar,and Scopus were searched,and papers from January 2000 to January 2024 were deemed eligible and filtered using predetermined inclusion and exclusion *** were assessed for methodological quality,and data were extracted for time to adequate anesthesia(sensory and motor blockade),duration of sensory and motor block,hemodynamic changes and side effect *** standardized mean difference with 95%CI was used for continuous *** variables were assessed using the Mantel-Haenszel test and the random effect model to compute the odds *** Total 8 RCTs were selected from a pool of 119 search results for *** meta-analysis evaluated pooled effect sizes and assessed heterogeneity among the *** primary objective was to compare key outcomes to identify any significant variances in efficacy and safety profiles between two local *** analysis revealed that the difference in the onset of sensory blockade between the two local anesthetics was statistically insignificant(P=0.1586).However,the onset of motor blockade appeared to be faster with bupivacaine(P=0.03589).Additionally,the regression of sensory and motor blockade occurred earlier in the ropivacaine ***,the duration of the first analgesic

关键词： Ropivacaine Bupivacaine Anesthesia Spinal Cesarean section Meta-analysis

Probing multi-mobility edges in quasiperiodic mosaic lattices

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Science Bulletin 2025年第1期70卷 58-63页

作者： Jun Gao Ivan M.Khaymovich Xiao-Wei Wang Ze-Sheng Xu Adrian Iovan Govind krishna Jiayidaer Jieensi Andrea Cataldo Alexander V.Balatsky Val Zwiller Ali W.Elshaari Department of Applied Physics KTH Royal Institute of TechnologyAlbanova University CentreStockholm SE-10691Sweden Nordita Stockholm University and KTH Royal Institute of TechnologyStockholm SE-10691Sweden Institute for Physics of Microstructures Russian Academy of SciencesNizhny Novgorod 603950Russia Center for Integrated Quantum Information Technologies(IQIT) School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and NetworksShanghai Jiao Tong UniversityShanghai 200240China Department of Physics University of ConnecticutStorrsConnecticut 06269USA

The mobility edge(ME)is a crucial concept in understanding localization physics,marking the critical transition between extended and localized states in the energy *** localization scaling theory predicts the absence of ME in lower dimensional ***,the search for exact MEs,particularly for single particles in lower dimensions,has recently garnered significant interest in both theoretical and experimental studies,resulting in notable ***,several open questions remain,including the possibility of a single system exhibiting multiple MEs and the continual existence of extended states,even within the strong disorder ***,we provide experimental evidence to address these questions by utilizing a quasiperiodic mosaic lattice with meticulously designed nanophotonic *** observations demonstrate the coexistence of both extended and localized states in lattices with broken duality symmetry and varying modulation *** single-site injection and scanning the disorder level,we could approximately probe the ME of the modulated *** results corroborate recent theoretical predictions,introduce a new avenue for investigating ME physics,and offer inspiration for further exploration of ME physics in the quantum regime using hybrid integrated photonic devices.

关键词： Mobility edge Localization physics Mosaic lattice Nanophotonics