检索结果-南通市图书馆

standardizing MI-TLIF, a proposal for a Reproducible Technique

Open Journal of Modern Neurosurgery 2024年第2期14卷 91-103页

作者： Iván Ulises sámano López jesús alberto pérez contreras Emmanuel Cantú Chávez Diana Chávez Lizárraga Ana sofía peña Blesa Thania Karina Gutiérrez Anchondo Á ngeles Pedregal Ciudad de México México

Background: Minimally invasive transforaminal lumbar interbody fusion (MI TLIF) is a widely known and performed technique, however its versatility among different physicians continues to hinder its replication and results. Therefore, this study aimed to provide a step-by-step surgical guide to perform a safe MI-TLIF, based on the results obtained in patients operated on by a single surgeon over a period of 12 years. patients and methods: A retrospective, single center, longitudinal, and observational cohort study was conducted with 931 patients who underwent MI TLIF by a single surgeon between 2010 and 2022 using the technique described on this paper, each with a minimum follow-up of 12 months. Criteria included schizas classification, listhesis according to Meyerding classification, number of levels treated, cage size, and complications (screw repositioning or cerebrospinal fluid leak). patient clinical outcomes were assessed using the Oswestry Disability Index (ODI), Visual Analog scale (VAs) for pre- and postoperative radicular pain. Thin slice CT scans were used to assess the progression of the fusion using the Bridwell classification. In the statistical analysis, percentages, median, and interquartile range (IQR) were calculated. Results: Nine hundred and thirty one patients underwent MI TLIF using the technique described, eight hundred and eighty (94.5%) had a single level treated and fifty one (5.5%) had a 2 level procedure (982 levels), an 8mm cage was placed on five hundred and seventeenlevels (52.7%), six hundred and sixty three levels(67.6%) achieved grade I fusion, two hundred and sixty six levels (27.1%) achieved grade II fusion, 52 levels (5.3) achieved grade III fusion and one level (0.1) achieved a grade IV fusion or non-union. Revision surgery was performed on 3 patients (0.3%) for screw repositioning, cerebrospinal fluid leak was present on 2 patients during surgery and treated before closure. VAs scores and ODI were improved at 12 months postop (V

关键词： MITLIF Lumbar Interbody Fusion Technique pain Relief and Disability

来源：

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

Academic stress Assessment Using Virtual Reality as an Educational Tool in spine surgery

引用

Open Journal of Modern Neurosurgery 2024年第2期14卷 114-123页

作者： Diana Chávez Lizárraga jesús alberto pérez contreras Fernando Alvarado Gómez Evelyn Quintero Medina Emmanuel Cantú Chávez Iván Ulises sámano López Ana sofía peña Blesa Department of Neurosurgery ángeles Pedregal Ciudad de México México Department of Traumatology and Orthopedics Hospital Santa Fe Bogotá Colombia

Introduction: The evaluation of academic stress in medical students and residents is a topic of significant interest, given the considerable challenges they face during their learning process with traditional teaching methods. The use of technologies like virtual reality presents an opportunity to enhance their skills through simulations and training. The main objective of this study is to qualitatively assess the stress levels experienced by medical students and residents by integrating virtual reality into their current learning methods, aiming to improve their ability to manage stressors in their practice. Material and Methods: A questionnaire was conducted with 12 medical students and 12 Traumatology and orthopedics residents. The purpose of the questionnaire was to evaluate the levels of academic stress using the sIsCO inventory. The stress levels were calculated by transforming average values into percentages, and the following criteria were assigned: 0 to 33% for Mild stress, 34 to 66% for Moderate stress, and 67 to 100% for Deep stress. Then, a virtual reality class focused on spine surgery was provided. Both medical students and residents were trained using the Non Nocere sharpsurgeon software platform and Oculus Quest 2 virtual reality glasses. At the end of the session, a second questionnaire related to the practice with virtual reality was conducted with the same evaluation criteria and a comparative analysis was carried out. Results: 12 undergraduate students from Hospital Angeles Mexico, CDMX and 12 traumatology and orthopedics residents at Hospital santa Fe, Bogota were evaluated. The students in CDMX reported an average qualitative stress of 28.50% during habitual practices, which decreased to an average of 14.67% after virtual reality practice. Residents in Bogotá experienced an average qualitative stress of 30.50% with their current learning methods but this reduced to an average of 13.92% after using virtual reality. These findings indicate that t

关键词： Virtual Reality Academic stress Learning strategies spine surgery Training

来源：

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

Endotoxin-induced alterations of adipose tissue function:a pathway to bovine metabolic stress

引用

Journal of Animal science and Biotechnology 2024年第4期15卷 1391-1407页

作者： Miguel Chirivi G.Andres contreras Department of Large Animal Clinical sciences Michigan State UniversityEast LansingMIUSA

During the periparturient period, dairy cows exhibit negative energy balance due to limited appetite and increased energy requirements for lactogenesis. The delicate equilibrium between energy availability and expenditure puts cows in a state of metabolic stress characterized by excessive lipolysis in white adipose tissues(AT), increased production of reactive oxygen species, and immune cell dysfunction. Metabolic stress, especially in AT, increases the risk for metabolic and inflammatory diseases. Around parturition, cows are also susceptible to endotoxemia. Bacterial-derived toxins cause endotoxemia by promoting inflammatory processes and immune cell infiltration in different organs and systems while impacting metabolic function by altering lipolysis, mitochondrial activity, and insulin sensitivity. In dairy cows, endotoxins enter the bloodstream after overcoming the defense mechanisms of the epithelial barriers, particularly during common periparturient conditions such as mastitis, metritis, and pneumonia, or after abrupt changes in the gut microbiome. In the bovine AT, endotoxins induce a pro-inflammatory response and stimulate lipolysis in AT, leading to the release of free fatty acids into the bloodstream. When excessive and protracted, endotoxin-induced lipolysis can impair adipocyte's insulin signaling pathways and lipid synthesis. Endotoxin exposure can also induce oxidative stress in AT through the production of reactive oxygen species by inflammatory cells and other cellular components. This review provides insights into endotoxins' impact on AT function, highlighting the gaps in our knowledge of the mechanisms underlying AT dysfunction, its connection with periparturient cows' disease risk, and the need to develop effective interventions to prevent and treat endotoxemia-related inflammatory conditions in dairy cattle.

关键词： Adipose tissue dysfunction Endotoxin Inflammation Insulin resistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Inversion of walkaway Vsp data in the presence of lateral velocity heterogeneity

引用

Energy Geoscience 2024年第2期5卷 304-313页

作者： Vladimir Grechka Ilya Tsvankin pedro contreras CWp Department of GeophysicsColorado School of MinesGoldenCO80401USA pDVsA-INTEVEp Apartado 76343Caracas1070AVenezuela Borehole seismic LLC USA Department of physics ULAVenezuela

Multi-azimuth walkaway vertical seismic profiling is an established technique for the estimation of in situ slowness surfaces and inferring anisotropy ***,this technique requires the assumption of lateral homogeneity,which makes the horizontal slowness components at depths of downhole receivers equal to those measured at the *** violations of this assumption,such as lateral heterogeneity or nonzero dip of intermediate interfaces,lead to distortions in reconstructed slowness surfaces and,consequently,to errors in estimated anisotropic *** this work,we relax the assumption of lateral homogeneity and discuss how to correct vertical seismic profile data for weak lateral *** describe a procedure of downward continuation of recorded traveltimes that accounts for the presence of both vertical inhomogeneity and weak lateral heterogeneity,which produces correct slowness surfaces at depths of downhole receivers,noticing that sufficiently dense receiver coverage along a borehole is required to separate influences of vertical and lateral heterogeneity on measured traveltimes and obtain accurate estimates of the slowness *** the slowness surfaces are found and a desired type of anisotropic model to be inverted is selected,the corresponding anisotropic parameters,providing the best fit to the estimated slownesses,can be *** invert the slowness surfaces of p-waves for parameters of the simplest anisotropic model describing dipping fractures(transversely isotropic medium with a tilted symmetry axis).Five parameters of this model,namely,the p-wave velocity V0 in the direction of the symmetry axis,Thomsen's anisotropic coefficients e and d,the tilt n,and the azimuth b of the symmetry axis,can be estimated in a stable manner when maximum source offset is greater than half of receiver depth.

关键词： Walkaway vertical seismic profile Lateral velocity heterogeneity Anisotropic parameter estimation Vertical inhomogeneity

来源：

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

Corrosion testing of X52 and X80 steels immersed in stimulated emulsions using a real petroleum sample

引用

petroleum Research 2024年第2期9卷 304-316页

作者： L.M.Quej-Ake J.L.Alamilla A.contreras Instituto Mexicano del petróleo Eje Central Lázaro CárdenasNorte 152San Bartolo AtepehuacanGustavo A.MaderoCiudad de MéxicoC.P.07730México

The aim of this study is to evaluate the internal corrosion process on X52 and X80 steels/real petroleum interfaces containing condensed hydrocarbon plus oilfield-produced water,which were subjected to stimulated emulsions using 50/50 vol ratio mixtures at 45℃,different hydrodynamic conditions,1 h,and 24 h.A washing process by using deionized water was proposed to simulate and identify the corrosiveness of the hydrocarbon phase after 24 h of exposure *** characterization by electrochemical impedance spectroscopy and the monitoring of the polarization curves indicated that X80 steel/oilfield-produced water interfaces were more susceptible to corrosion than X52 steel exposed to oilfield-produced *** combined speed rotation of 600 rpm using a magnetic stirrer+600 rpm using a rotating disk electrode decreased the corrosion rate on X52 *** stimulated emulsions made of hydrocarbon+oilfield-produced water and hydrocarbon+deionized water at 24 h increased the corrosion rate on X80 steel(0.34 mm/year and 0.43 mm/year,respectively),promoting the formation of erosion and pitting *** types of corrosion depended mainly on the physicochemical properties of the hydrocarbon,oilfield-produced water,exposure times,and hydrodynamic systems in which the hydrocarbon was studied.

关键词： Corrosion Emulsions X52 steel X80 steel

来源：

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

Remediation of amide pesticide-polluted soils by combined solarization and ozonation treatment

引用

pedosphere 2024年第3期34卷 641-651页

作者： Isabel GARRIDO Carmen MMARTINEZ pilar FLOREs pilar HELLIN Fulgencio contreras Jose FENOLL Department of sustainability and Quality Group of Fruit and Vegetable products Instituto Murciano de Investigacion y Desarrollo Agrario y MedioambientalLa Alberca 30150(Spain)

Agriculture has a close relationship with nature,but it can also be the source of negative and permanent environmental *** use of pesticides in modern agriculture is a common practice,but their side effects on the environment cannot be *** this study,we evaluated a combination of solarization and ozonation techniques for the elimination of six amide pesticides(boscalid,chlorantraniliprole,cyflufenamid,fluopyram,napropamide,and propyzamide)in *** experiments were performed with four different soils to assess the efficiency of this methodology at different soil temperatures and ozone dosages under laboratory conditions,and then a greenhouse pot experiment was conducted under controlled conditions during *** days after the onset of the experiments,higher degradation percentages of amide pesticides were observed in ozonized soils than in other treated soils,particularly when ozone was applied at 10 cm soil *** results show that the utilization of ozonation,along with solarization,represents a valid method for degrading residues of the studied pesticides and suggest that this combined technology may be a promising tool for remediating pesticide-polluted soils.

关键词： intermediate ozone pesticide degradation pesticide residue polyethylene film remediation technique

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

sex differences in Alzheimer's disease:an urgent research venue to follow

引用

Neural Regeneration Research 2024年第12期19卷 2569-2570页

作者： Raquel Jiménez-Herrera Ana contreras Juan D.Navarro-López Lydia Jiménez-Díaz Neurophysiology&Behavior Lab University of Castilla-La ManchaSchool of Medicine of Ciudad RealCiudad RealSpain

Due to increasing life expectancy,the amount of people with dementia worldwide is expected to experience a substantial rise,with estimates indicating a growth from 55 million in 2019 to a staggering 139 million by the... 详细信息

关键词： Alzheimer predominant estimates

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

加夫列尔·加西亚·马尔克斯图书馆,巴塞罗那,西班牙

引用

世界建筑 2024年第5期 76-81页

作者：无 Elena Orte Guillermo sevillano Marta Romero jesús Lopez Luis sierra Ana patricia Minguito pablo Corroto María Abellán sara contreras RitaÁlvarez Tabio MiguelÁngel Maure jesús Granada(摄影) sUMA建筑设计事务所不详

加布里埃尔·加西亚·马尔克斯图书馆是巴塞罗那的第40座图书馆,也是巴塞罗那30年计划的结晶。该计划旨在建立一个由优秀社区与区域设施组成的密集网络。这座图书馆位于圣马蒂德普罗旺斯区,为53,000人提供服务。关联式建筑图书馆被设计... 详细信息

加布里埃尔·加西亚·马尔克斯图书馆是巴塞罗那的第40座图书馆,也是巴塞罗那30年计划的结晶。该计划旨在建立一个由优秀社区与区域设施组成的密集网络。这座图书馆位于圣马蒂德普罗旺斯区,为53,000人提供服务。关联式建筑图书馆被设计成一座雕塑式实体建筑,让人联想到堆叠的书籍及其折叠的书页。该馆坐落在一处高架广场上,方便周围行人来往。同时,它又在空地上悬挑而出,门廊由现有的树木环绕,形成了一座城市大厅。不同大小及结构的开口定义了其不同立面与周围环境的关系。

关键词：巴塞罗那普罗旺斯周围环境加布里埃尔加西亚·马尔克斯图书馆关联式西班牙

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Evaluation of trace element mobilization and control under different fluidized bed combustion scenarios

引用

Clean Energy 2018年第2期2卷 167-174页

作者： María Luisa contreras alberto Bahillo CIEMAT Department of EnergyAvdaComplutense 4028040 MadridSpain

As consequence of its relatively abundant reserves compared to other energy sources,coal will continue to be widely employed in power *** reduce coal’s negative impact on the environment,new approaches have been evaluated and adopted by various countries in recent years to minimize CO_(2) *** developments focused on the selection of new fuels(such as biomass fuels)to combine with coal to reduce emissions from coal combustion,whereas subsequent approaches aimed at implementing new processes for CO_(2) capture and storage,such as oxy-fuel *** addition,coal combustion is one of the main anthropogenic sources of trace elements(TE)emitted to the *** increasing knowledge acquired as to the impact of these pollutants in the environment has led to more restricted emission standards for some of these elements and to increased research on the technologies and pathways to control these *** article reviews the main factors involved in TE capture by comparing results obtained for Hg and other TEs under different control *** the effect of novel combustion processes and the potential of different pollution control techniques toward these pollutants are discussed.

关键词： trace elements mercury oxy-fuel combustion cofiring biomass

来源：

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

Factors that influence outcome in non-invasive and invasive treatment in polycystic liver disease patients

引用

World Journal of Gastroenterology 2008年第20期14卷 3195-3200页

作者： Josué Barahona-Garrido jesús Camacho-Escobedo Eduardo Cerda-contreras Jorge Hernández-Calleros jesús K Yamamoto-Furusho Aldo Torre Misael Uribe Department of Gastroenterology National Institute of Health Sciences and Nutrition "Salvador Zubirán" Mexico City 14000 Mexico

AIM: To evaluate the factors that influence outcome of both non-invasive and invasive treatment of polycystic liver disease. METHODs: Analysis of clinical files of patients with complete follow-up from July 1986 to June 2006. REsULTs: Forty-one patients (male, 7; female, 34), 47.8 ± 11.9 years age, and 5.7 ± 6.7 years follow-up, were studied. Alkaline phosphatase (Ap) elevation (15% of patients) was associated with the requirement of invasive treatment (IT, p = 0.005). IT rate was higher in symptomatic than non-symptomatic patients (65.4% vs 14.3%, p = 0.002), and in women taking hormonal replacement therapy (HRT) (p = 0.001). Cysts complications (CC) were more frequent (22%) in the symptomatic patients group (p = 0.023). patients with body mass index (BMI) > 25 (59%) had a trend to complications after IT (p = 0.075). Abdominal pain was the most common symptom (56%) and indication for IT (78%). Nineteen patients (46%) required a first IT: 12 open fenestration (OF), 4 laparoscopic fenestration (LF) and 3 fenestration with hepatic resection (FHR). Three required a second IT, and one required a third procedure. Complications due to first IT were found in 32% (OF 16.7%, LF 25%, FHR 66.7%), and in thesecond IT in 66.7% (OF 100%). Follow-up mortality rate was 0. CONCLUsION: presence of symptoms, elevated Ap, and CC are associated with IT requirement. HRT is associated with presence of symptoms and IT requirement. patients with BMI > 25 have a trend be susceptible to IT complications. The proportions of complications are higher in FHR and second IT groups. Rs is more frequent after OF.

关键词： Hepatic cysts Open fenestration Laparoscopic fenestration Hepatic resection Recurrenceof symptoms Hormonal replacement therapy

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：