检索结果-南通市图书馆

Successful outcomes of unilateral vs bilateral pedicle screw fixation for lumbar interbody fusion:A meta-analysis with evidence grading

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第36期10卷 13337-13348页

作者： Lei Sun Ai-Xian Tian Jian-Xiong ma xin-long ma Orthopedic Research Institute Tianjin HospitalTianjin UniversityTianjin 300050China

BACKGROUND Whether it’s better to adopt unilateral pedicle screw(UPS)fixation or to use bilateral pedicle screw(BPS)one for lumbar degenerative diseases is still controversially *** To make a comparison between UPS and BPS fixation as to how they work efficaciously and safely in patients suffering from lumbar degenerative *** We have searched a lot in the databases through 2020 with index terms such as“unilateral pedicle screw fixation”and“bilateral pedicle screw fixation.”Only randomized controlled trials and some prospective cohort studies could be found,yielding 15 *** intervention was unilateral pedicle screw fixation;Primarily We’ve got outcomes of complications and fusion ***,we’ve achieved outcomes regarding total blood loss,operative time,as well as length of *** were installed and utilized for subgroup analysis,analyzing forest plots,sensitivity,heterogeneity,forest plots,publication bias,and risk of *** Fifteen previous cases of study including 992 participants have been involved in our *** had slightly lower effects on fusion rate[relative risk(RR)=0.949,95%CI:0.910 to 0.990,P=0.015],which contributed mostly to this metaanalysis,and similar complication rates(RR=1.140,95%CI:0.792 to 1.640,P=0.481),Δvisual analog scale[standard mean difference(SMD)=0.178,95%CI:-0.021 to 0.378,P=0.080],andΔOswestry disability index(SMD=-0.254,95%CI:-0.820 to 0.329,P=0.402).In contrast,an obvious difference has been observed inΔJapanese Orthopedic Association(JOA)score(SMD=0.305,95%CI:0.046 to 0.563,P=0.021),total blood loss(SMD=-1.586,95%CI:-2.182 to-0.990,P=0.000),operation time(SMD=-2.831,95%CI:-3.753 to-1.909,P=0.000),and length of hospital stay(SMD=-0.614,95%CI:-1.050 to-0.179,P=0.006).CONCLUSION Bilateral fixation is more effective than unilateral fixation regarding fusion rate after lumbar interbody ***,JOA,operation time,total blood loss,as well as length of stay were improve

关键词： Unilateral pedicle screw fixation Bilateral pedicle screw fixation Meta-analysis Spinal fusion surgery Discectomy Lumbar interbody fusion

Robust and High-Wettability Pristine Poly(ether ether ketone) Nanofiber Separator for Heat-Resistant and Safe Lithium-Ion Battery

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2023年第12期41卷 1937-1946,I0009页

作者： xin-Ke Dai Feng-Shan Yu Jia-Wei Wen Chun-Xia Wang xin-long ma Wang Yang Guo-Yong Huang Hai-Mu Ye College of New Energy and materials China University of PetroleumBeijing 102249China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China

Separator is a pivotal component of lithium-ion batteries(LIBs)and determines the electrochemical performance and ***,with the increase in energy density and application scenarios,commercial polyolefin separators are increasingly unable to undertake heavy responsibility of battery safety ***,a new kind of nanofiber separator based on poly(ether ether ketone)(PEEK)with excellent thermal stability,self-extinguishing,and superior electrochemical properties is *** inheritance of intrinsic properties from raw PEEK materials and optimized hot-pressing operation endows the separator with high robustness and wettability,showing tensile strength of 15.8 MPa and a contact angle of 17.2°.The high thermal stability of PEEK can ensure the separator to preserve the structural integrity and microstructure at temperatures beyond 300℃,and the excellent self-extinguishing peculiarity of PEEK capacitates the high safety of ***,benefitting from high porosity and polar surface,the PEEK separator shows high electrolyte uptake of 245.5%and exhibits a wider electrochemical window and faster lithium-ion transport number than commercial polyolefin ***,cells assembled with PEEK separator display better performance than the ones with PE separator,and the PEEK LIB has been successfully used to light up a lamp at a high temperature of 150℃.

关键词： Separator Lithium-ion battery Heat-resistance PEEK

Mechanical analysis of the femoral neck dynamic intersection system with different nail angles and clinical applications

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第20期11卷 4814-4823页

作者： Ying Wang Jian-Xiong ma Hao-Hao Bai Bin Lu Lei Sun Hong-Zhen Jin xin-long ma Orthopaedics Institute Tianjin HospitalTianjin UniversityTianjin 300050China

BACKGROUND The femoral neck dynamic intersection system(FNS)is mechanically more stable than other internal fixation *** studies have confirmed that the structural design of FNS has good biomechanical properties in European and American ***,whether the suitability of the FNS's 130°main nail angle design for Asian populations has been thoroughly investigated remains *** To compare the biomechanical stability differences among different main nail angles of the FNS in the treatment of femoral neck fractures in Asian *** Computed tomography data of the femur of healthy adult male volunteers were imported into Mimics software to create a three-dimensional model of the *** model was adapted to the curve using Geomagic software and imported into Solidworks software to construct the Pauwels I femoral neck fracture model and design the FNS internal fixation model using different main nail ***,the models were assembled with the FNS fracture model and meshed using the preprocessing Hypermesh ***,they were imported into Abaqus software to analyze and evaluate the biomechanical effects of different angles of the FNS main nail on the treatment of femoral neck *** The peak displacement of the proximal femur under different angles of FNS fixation under stress was 7.446 millimeters in the 120°group and 7.416 millimeters in the 125°group;in the 130°,135°,and 140°FNS fixation groups,the peak displacement was 7.324 millimeters,8.138 millimeters,and 8.246 millimeters,*** the 120°and 125°FNS fixation groups,the maximum stresses were concentrated at the main nail and the anti-rotation screw,which intersected the fracture line of the femur neck,resulting in peak stresses of 200.7 MPa and 138.8 MPa,*** stresses of 208.8 MPa,219.8 MPa,and 239.3 MPa were observed on the angular locking plate distal to the locking screw in the 130°,135°,and 140°fixation ***

关键词： Femoral neck dynamic intersection system Biomechanics Three-dimensional reconstruction Nail angle Finite element analysis Stress

Ultrastructural study on route of gut bacterial translocation in a rat after spinal cord injury

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国应用生理学杂志 2015年第6期31卷 561-566页

作者： Chun-hong BAI xin-long ma Tianjin Hospital the Clinical orthopedics of Tianjin Medical University

Objective: To observe the ultrastructural change of the route of gut bacterial translocation in a rat with spinal cord injury(SCI).Methods: Forty Wistar rats were divided into the following groups: control group and 3 SCI groups(10 in each group). The rats in the SCI groups were established SCI model at 24 h, 48 h, and 72 h after SCI. Small intestine mucous membrane tissue was identified and assayed by transmission electron microscope, scanning electron microscope and immunofluorescence microscopy. Results: Small intestine mucous membrane tissue in control group was not damaged significantly, but those in SCI groups were damaged significantly. Proliferation bacteria in gut lumen attached on microvilli. The extracellular bacteria torn the intestinal barrier and perforated into the small intestinal mucosal epithelial cell. The bacteria and a lot of particles of the seriously damaged region penetrated into the lymphatic system and the blood system directly. Some bacteria were internalized into the goblet cell through the apical granule. Some bacteria and particles perforated into the submucosa of the M cell running the long axis of M cells through the tight junctions. In the microcirculation of mucosa, the bacteria that had already broken through the microvilli into blood circulation swim accompanying with erythrocytes. Conclusion: The routes of bacterial translocation interact and format a vicious circle. At early step, the transcellular pathway of bacterial translocation is major. Following with the destroyed small intestine mucous, the routes of bacterial translocation through the lymphatic system and the blood system become direct pathways. The goblet cell-dendritic cell and M cell pathway also play an important role in the bacterial translocation.

关键词： Wistar大鼠肠道细菌脊髓损伤超微结构易位小肠黏膜细胞增殖细菌移位

Bibliometric analysis of literature review of osteoarthritis in the Cochrane database

在线全文

学校读者我要写书评

暂无评论

Medical Data Mining 2022年第4期5卷 16-23页

作者： Jun-Qing Zhong Hui-Lin Zhang xin-long ma Department of Rehabilitation Tianjin HospitalTianjinChina Department of Orthopedics Tianjin HospitalTianjinChina

A bibliometric analysis was conducted on reviews on osteoarthritis available in the Cochrane *** the Bibliometrix software,93 literature reviews with“osteoarthritis”as a keyword were *** reviews’authors,keywords,and citations were visually analyzed to explore the design process and research hotspots of clinical research on *** our knowledge,this is the first bibliometric analysis of Cochrane review literature on *** findings of this analysis may help researchers understand the developmental trends in the discipline and guide them in clinical research in the future.

关键词： bibliometric review cochrane osteoarthritis

A methodological systematic review of early versus late stabilization of thoracolumbar spine fractures

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A methodological systematic review of early versus late stab...

Evidence-based independent risk factors for surgical site infections after spinal surgery:a systematic review

第二十届全国中西医结合骨伤科学术研讨会、第二届中国医师协会中西医结合医师分会骨伤科学术年会、第十九届浙江省中西医结合骨伤科专业委员会学术年会

作者： xin-long ma Dan xing Jian-Xiong ma Jie Wang Yang Chen Yang Yang Department of Orthopaedics Tianjin Medical University General Hospital Department of Orthopaedics Institute Tianjin Hospital Department of Orthopaedics Tianjin Gongan Hospital

Objective The optimal timing of stabilization in patients with traumatic thoracolumbar fractures remains *** is currently a lack of consensus on the timing of surgical stabilization, which is limited by the reality that a randomized controlled trial to evaluate early versus late stabilization is difficult to ***,the objective of this study was to determine the benefits,safety and costs of early stabilization compared with late stabilization using data available in the current literature. Methods An electronic literature search was performed in Medline,Embase,Cochrane Database of Systematic Reviews,and Cochrane Central Register of Controlled Trials for relevant studies evaluating the timing of surgery in patients with thoracolumbar *** reviewers independently analyzed and selected each study on the basis of the eligibility *** quality of the included studies was assessed using the Grading of Recommendations Assessment,Development,and Evaluation system(GRADE).Any disagreements were resolved by consensus. Results Ten studies involving 2512 subjects were *** studies demonstrated that early stabilization shortened the hospital length of stay,intensive care unit length of stay,ventilator days and reduced morbidity and hospital expenses for patients with thoracic ***,reduced morbidity and hospital expenses were not observed with stabilization of lumbar *** to the very low level of evidence,no conclusion could be made regarding the effect of early stabilization on mortality. Conclusions We adhere to the recommendation that patients with traumatic thoracolumbar fractures should undergo early stabilization,which may reduce the hospital length of stay,intensive care unit length of stay, ventilator days,morbidity and hospital expenses,particularly when the thoracic spine is *** prospective studies are required to confirm whether there are benefits to early stabilization compared

关键词： A methodological systematic review of early versus late stabilization of thoracolumbar spine fractures

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Evidence-based independent risk factors for surgical site in...

Research status and prospects of the fractal analysis of metal material surfaces and interfaces

作者： Dan xing xin-long ma Jian-Xiong ma Jie Wang Yang Chen Wei-Guo Xu Department of Orthopaedics Tianjin Medical University General Hospital Department of Orthopaedics Tianjin Gongan Hospital Department of Orthopaedics Institute Tianjin Hospital

Objective To identify the independent risk factors for the patients with surgical site infections (SSI) after spinal surgery based on available evidence in the literature. *** site infections(SSI) lead to higher morbidity,mortality and increased healthcare *** risk factors influence the postoperative *** which factors lead to an increased risk of SSI is of importance for the development of prophylactic protocols to counter this ***,these factors have neither been well synthesized or summarised according to methodological quality of studies evaluating risk factors for SSI. Methods Non-interventional studies evaluating the independent risk factors for the patients with SSI following spinal surgery were searched in Medline,Embase,Sciencedirect and *** of included studies were assessed by a modified quality assessment tool,which was previously designed for observational *** effects of studies were combined with the study quality score using a model of best-evidence synthesis. Results 35 observational studies involving 24,774 subjects were *** studies covered a wide range of indications and surgical *** articles published between 1998 to *** to the quality assessment criteria for included studies,14 studies were deemed as high quality studies,5 as moderate quality studies,and 16 as low quality studies.A total of 46 different type of independent factors were evaluated for the risk of *** were strong evidence for 6 factors,including obesity/BMI,longer operation time,diabetes,smoking,history of previous SSI and type of surgery *** also identified 8 moderate evidence,31 limited evidence and one conflicting evidence factors. Conclusion Whilst there is no conclusive evidence for the postoperative SSI,these data provide evidence to guide the clinician to admit patients who will have spinal operation and to choice a optimal prophylactic *** rese

关键词： surgical site infection spinal surgery postoperative infection risk factors systematic review

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and materials 2025年第1期32卷 20-38页

作者： Qinjin Dai Xuefeng Liu xin ma Shaojie Tian Qinghe Cui Beijing Advanced Innovation Center for materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China Laboratory for Advanced materials Processing of Ministry of Education University of Science and Technology BeijingBeijing 100083China School of Mechanical and Electrical Engineering Xinjiang Institute of EngineeringUrumqi 830023China

As a mathematical analysis method,fractal analysis can be used to quantitatively describe irregular shapes with self-similar or self-affine *** analysis has been used to characterize the shapes of metal materials at various scales and *** methods make it difficult to quantitatively describe the relationship between the regular characteristics and properties of metal material surfaces and ***,fractal analysis can be used to quantitatively describe the shape characteristics of metal materials and to establish the quantitative relationships between the shape characteristics and various properties of metal *** the perspective of two-dimensional planes and three-dimensional curved surfaces,this paper reviews the current research status of the fractal analysis of metal precipitate interfaces,metal grain boundary interfaces,metal-deposited film surfaces,metal fracture surfaces,metal machined surfaces,and metal wear *** relationship between the fractal dimensions and properties of metal material surfaces and interfaces is *** from three perspectives of fractal analysis,namely,research scope,image acquisition methods,and calculation methods,this paper identifies the direction of research on fractal analysis of metal material surfaces and interfaces that need to be *** is believed that revealing the deep influence mechanism between the fractal dimensions and properties of metal material surfaces and interfaces will be the key research direction of the fractal analysis of metal materials in the future.

关键词： metal material surfaces and interfaces fractal analysis fractal dimension homogeneity

Multi-receptive field interaction network for shape from polarization

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2025年第1期 394-395页

作者： Yini PENG Rui LIU Zhiyuan ZHANG Zhongyuan WANG Jiayi ma xin TIAN Electronic Information School Wuhan University Computer Science School Wuhan University Wuhan Institute of Quantum Technology

Shape from polarization (SfP) method can use the polarization information in reflected light to estimate the surface normal of the target,which can further reconstruct the shape of the *** a simple image capture process,it can use low-cost equipment to meet a high precision imaging requirement,which can be used in remote scenes and other applications.

关键词：