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Ventriculo-atrial shunt with occlusion of the internal jugular vein: operative experience and surgical technique

中华神经外科杂志(英文) 2024年第2期10卷 1-8页

作者： Quintero Silvia Tatiana Ramirez-Velandia Felipe Moreno Andres Felipe Hortua Vera Lina Rugeles Paula gonzalez rafael Augusto Azuero Pontificia Universidad Javeriana Clinica Medilaser S.A.S. Clinica Chicamocha Bucaramanga Santander Colombia Neurology and Neurosurgery Research Group Pontificia Universidad Javeriana Bogotá D.C. Colombia Universidad Industrial de Santander Clinica Chicamocha Bucaramanga Colombia Universidad Autónoma de Bucaramanga Clinica Chicamocha Bucaramanga Colombia Clinica Chicamocha Bucaramanga Santander Colombia

Background Ventricular shunts are one of the most frequent techniques used for the management of hydrocephalus. The ventriculoperitoneal shunt (VPS) is the most commonly performed procedure, and the ventriculoatrial shunt (VAS) is the second option in most medical centers. The main objective of this study is to introduce and describe a surgical approach for VAS outlining our experience and comparing it with traditional shunting *** In this retrospective cohort comparison study, we included patients with hydrocephalus treated with a surgical procedure between January 2010 and February 2021 at a single academic institution. We categorized the procedures into two groups: patients with VPS and conventional VAS grouped together into the conventional technique (CT) group, and the second group was patients with whom we performed VAS with complete internal jugular vein occlusion (IJVOT). We compared the surgical time, postoperative complications, and occurrence of shunt failure among the groups by performing univariate analysis using the Fisher exact *** Out of the 106 patients included in the analysis, IJVOT was performed in 66 patients, and CT in 40 patients. The median surgical time was 60 min (IQR 60-90) for IJVOT versus 100 min (IQR 60-120) for CT (p < 0.01). In the follow-up a month after the procedure, 83.3% of patients with IJVOT and 62.5% of patients with CT did not require shunt removal or shunt revision (p < 0.01). Shunt revision rates were 12.5% and 1.5% for CT while 1.5% and 2.5% for IJVOT at 1 and 6 months after the *** Our findings demonstrate that VAS with IJVOT is a safe method that exhibited shorter surgical times and outcomes comparable to CT. However, since the present study represents the first cohort evaluating IJVOT, it is imperative to conduct larger prospective studies, along with clinical trials, to fully explore and establish efficacy, long-term outcomes, and an in-depth comparison among shunting techniques

关键词： Hydrocephalus Ventriculoatrial shunting Internal jugular vein Operative time Complications Shunt removal

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Immersed Boundary Approach to Biofilm Spread on Surfaces

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Communications in Computational Physics 2022年第1期31卷 257-292页

作者： Ana Carpio rafael gonzalez-Albaladejo Departamento de Matematica Aplicada Universidad Complutense28040 MadridSpain

We propose a computational model to study the growth and spread of bacterial biofilms on interfaces,as well as the action of antibiotics on *** membranes are represented by boundaries immersed in a fluid matrix and subject to interaction ***,division and death of bacterial cells follow dynamic energy budget rules,in response to variations in environmental concentrations of nutrients,toxicants and substances released by the *** this way,we create,destroy and enlarge boundaries,either spherical or *** forces represent details of the interaction between cells,and the interaction with the *** can investigate geometrical arrangements and the formation of porous *** simulations illustrate the evolution of top views and diametral slices of small biofilm seeds,as well as the action of *** show that cocktails of antibiotics targeting active and dormant cells can entirely eradicate a biofilm.

关键词： Hybrid multiscale models immersed boundary methods dynamic energy budget models bacterial biofilm antibiotic resistance

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A novel and stretchable carbon-nanotube/Ni@TiO_(2):W photocatalytic composite for the complete removal of diclofenac drug from the drinking water

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Journal of Environmental Sciences 2023年第4期126卷 575-589页

作者： Ernesto Valadez-Renteria rafael Perez-gonzalez Christian Gomez-Solis Luis Armando Diaz-Torres Armando Encinas Jorge Oliva Vicente Rodriguez-gonzalez Consejo Nacional de Ciencia y Tecnología-División de Materiales Avanzados Instituto Potosino de Investigación Científica y TecnológicaSan Luis Potosí78216México División de Ciencias e Ingenierías Universidad de GuanajuatoLeón 37150México Grupo de Espectroscopia de Materiales Avanzados y Nanoestructurados(GEMANA) Centro de Investigaciones enópticaA.C.Lomas Del CampestreLeón 37150México

We present the structural,morphological and photocatalytic properties of stretchable composites made with carbon nanotubes (CNTs),silicon rubber and Ni@TiO_(2):W nanoparticles(TiWNi NPs) with average size of 37±2 *** images showed that the TiWNi NPs decorated the surface of the CNT fibers,which are oriented in a preferential *** NPs presented a mixture of anatase/rutile phases with cubic *** performance of the TiWNi powders and stretchable composites was evaluated for the photocatalytic degradation of diclofenac (DCF) anti-inflammatory drug under ultraviolet-visible *** results revealed that the maximum DCF degradation percentages were 34.6%,91.9%,97.1%,98.5%and 100%for the CNT composite (stretched at 0%),TiWNi powders,CNT+TiWNi(stretched at 0%),CNT+TiWNi (stretched at 50%) and CNT+TiWNi (stretched at 100%),***,stretching the CNT+TiWNi composites was a good strategy to enhance the DCF degradation percentage from 97.1%to 100%,since stretching created additional defects (oxygen vacancies) that acted as electron sink,delaying the electron-hole recombination,and favors the DCF ***/absorbance measurements confirmed the presence of such ***,the reactive oxygen species (ROS) were determined by the scavenger’s experiments and found that the main ROS were the·OH and O_(2)-radicals,which attacked the DCF molecules,causing their *** results of this investigation confirmed that the stretchable CNT/TiWNi-based composites are a viable alternative to remove pharmaceutical contaminants from water and can be manually separated from the decontaminated water,which is unviable using photocatalytic powders.

关键词： Diclofenac Pharmaceutical contaminant TiO_(2) Carbon nanotubes Stretchable composite Photocatalysis

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Contributions to data transmission at critical moments on unmanned aerial vehicles

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Chinese Journal of Aeronautics 2023年第8期36卷 247-257页

作者： Jose Enrique RODRIGUEZ David SEGURADO Manuel SANCHEZ Jose Javier MARTINEZ rafael gonzalez National Institute of Aerospace Technology Madrid 28850Spain Department of Computer Science University of AlcalaAlcala de HenaresMadrid 28054Spain

As for unmanned aircraft, the knowledge of the aircraft performance is directly related with the navigation, guidance, and control system programming. Therefore, the measured data in each phase of the flight must be sufficiently precise to obtain a good characterization of *** article proposes new methods of sending information to ground, which make it possible to know the aircraft behavior accurately, and for this purpose, four contributions have been made for ALO(Avión Ligero de Observación, Spanish acronym for Light Observation Aircraft). Currently, the characterization is based on data obtained at ten samples per second, insufficient to acquire detailed knowledge of what happened during the whole flight of an aircraft. As a result of these contributions, many more samples per second of accelerations and angular velocities are obtained at the most critical moments of the flight, such as takeoff or landing. Among the improvements included are data compression techniques, providing references to locate the measured data in time and identifying labels of each parameter.

关键词： Critical moments Data transmission Datacompression tech-niques Radio-modem Recommended Standard 232(RS-232) Unmannedaerial vehicle

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Carbon stock estimation in halophytic wooded savannas of Uruguay:An ecosystem approach

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Forest Ecosystems 2024年第4期11卷 580-589页

作者： Andres Baietto Andres Hirigoyen Carolina Toranza Franco Schinato Maximiliano gonzalez rafael Navarro Cerrillo Forest Department Faculty of AgronomyUniversity of the RepublicMontevideoPO 12900Uruguay National Research Program of Forest Production National Agriculture Research InstituteTacuaremboPO 97000Uruguay Soil and Water Department Faculty of AgronomyUniversity of the RepublicMontevideoPO 12900Uruguay Department of Forestry Engineering University of CordobaCordobaPO 14014Spain

Savannas constitute a mixture of trees and shrub patches with a more continuous herbaceous *** contribution of this biome to the soil organic carbon(SOC)and above-ground biomass(AGB)carbon(C)stock globally is ***,they are frequently subjected to land use changes,promoting increases in CO_(2) *** Uruguay,subtropical wooded savannas cover around 100,000 ha,of which approximately 28%is circumscribed to sodic soils(i.e.,subtropical halophytic wooded savannas).Nevertheless,there is little background about the contribution of each ecosystem component to the C stock as well as site-specific allometric *** study was conducted in 5 ha of subtropical halophytic wooded savannas of the national protected area Esteros y Algarrobales del Rio *** work aimed to estimate the contribution of the main ecosystem components(e.g.,soil,trees,shrubs,and herbaceous plants)to the C ***-specific allometric equations for the most frequent tree species and shrub genus were fitted based on basal diameter(BD)and total height(H).The fitted equations accounted for between 77%and 98%of the aerial biomass variance of Netuma affinis and Vachellia *** shrubs(Baccharis sp.),the adjusted equation accounted for 86%of total aerial biomass.C stock for the entire system was 116.71±11.07 Mg·ha^(-1),of which 90.7%was allocated in the soil,8.3%in the trees,0.8%in the herbaceous plants,and 0.2%in the *** results highlight the importance of subtropical halophytic wooded savannas as C sinks and their relevance in the mitigation of global warming under a climate change scenario.

关键词： Carbon stock Climate change Biomass modeling Sodic soils

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HLA B27 as Predisposition Factor to Suffer Age Related Macular Degeneration

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Cellular & Molecular Immunology 2009年第4期6卷 303-307页

作者： Enrique Villegas Becerril rafael gonzalez Fernandez Luis Perula Torres Manuel Santos Lacomba Jose Maria Gallardo Galera Hospital Universitario Reina Sofia Cordoba Spain Faculty of Medicine University of Cordoba Spain Hospital Universitario Reina Sofia C/Conchita Cintron n 4 Atico 2 CP 14011

To research whether specific alleles HLA class Ⅰ （HLA-A and HLA-B） and class Ⅱ （HLA-DR） are risk factors for the development of exudative type of Age Related Macular Degeneration（ARMD）, HLA antigens are expressed both in normal and affected eyes with ARMD. We designed a prospective case-controlled study. We recruited 75 patients with choroidal neovascuiarization predominantly classic or occult, secondary to ARMD, and treated with photodynamic therapy. Two hundred and fifty patients over 55 years old, without ophthalmologic pathology who went to hospital for an analytical routine check were used as control. The analysis of the data shows a significant difference between two groups. Allele HLA-B27 correlated positively with ARMD （p 〈 0.0113）. However, we didn＇t find alleles negatively associated. Thus HLA-B27 is an allele predisposed to suffer ARMD.

关键词： HLA alleles ARMD HLA B27 patient with ARMD

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Allograft Survival without Immunosuppression in Landrace Pigs after 90 Days

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Open Journal of Organ Transplant Surgery 2013年第4期3卷 63-64页

作者： rafael Valdés-gonzalez Arturo Mundo Acevedo Ana L. Rodriguez-Ventura Pedro Valencia Mayoral Departamento de Cirugía Universidad Nacional Autónoma de México Ciudad de México México Departamento de Patología Hospital Infantil de México Mexico D.F. México Hospital Infantil de México Endocrinología Mexico D.F. México

Allotransplantation is helpful in order to maintain the life in some cases, but immunosuppression causes collateral effects. In this study, we were reporting the results of allografts in Landrace pigs, which were implanted on collagen-generator devices. After 2 weeks of implantation, the devices were carried out to assess allograft viability at 30, 60 and 90 days post implant. The implanted cells were islets of Langerhans and the aim was to prove their presence by immunohistochemistry for insulin and glucagon. The results were positive at 30, 60 and 90 days post implant. It demonstrated that the collagen-generator device permits the cell viability without using anti-rejected drugs or immunomodulating cells.

关键词： Allografts Collagen-Generator Device

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黎明之塔,吉隆坡,马来西亚

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城市建筑 2010年第10期 106-110页

作者： Alejandro Diaz rafael gonzalez Monica Noguero Oihane Santiuste Maren Klasing Martin Krcha Daniel Domingo Zaha Hadid with Patrik Schumacher

由扎哈·哈迪德建筑师事务所设计的黎明之塔与城市环境实现了多元化的功能对接。通过对不同层面潜在协同作用的不断探索,建筑设计立足现有城市环境,创造了一个与周边环境及建筑接轨的服务平台。设计方案将全部功能融于一座建筑之中,通... 详细信息

由扎哈·哈迪德建筑师事务所设计的黎明之塔与城市环境实现了多元化的功能对接。通过对不同层面潜在协同作用的不断探索,建筑设计立足现有城市环境,创造了一个与周边环境及建筑接轨的服务平台。设计方案将全部功能融于一座建筑之中,通过运用细致的景观策略,实现了建筑与地面的过渡,连接了基址的各个部分,完成了新人行道路与内部街路体系的整合,从而构建了全新的建筑结构。

关键词：建筑结构区块功能扎哈·哈迪德空间网吉隆坡黎明马来西亚

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Aedes-borne viral infections and risk of emergence/resurgence in Sub-Saharan African urban areas

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Journal of Biosafety and Biosecurity 2020年第2期2卷 58-63页

作者： Alexandre Zerbo rafael Castro Delgado Pedro Arcos gonzalez Unit for Research in Emergency and Disaster Faculty of Medicine and Health SciencesUniversity of Oviedo33006 OviedoSpain

The sub-Saharan African region is increasingly becoming urbanized with the creation of an urban ecology that is conducive to the emergence of vector-borne diseases,such as Aedes-borne viral *** viral infections pose a threat to urban health in sub-Saharan *** major menacing arbovirus diseases in sub-Saharan Africa include dengue,yellow fever,chikungunya,and Zika,since they have shown(re)emergence in the last *** this review,we analyzed the risk factors for the resurgence of these arboviral diseases as well as their epidemiology and burden by studying the *** results suggested that the risk of emergence of Aedes-borne viral infections was related to the urbanicity and competence of Aedes,the genetics of these viruses,environmental factors,and the socio-economic conditions of the sub-Saharan population in urban *** public health awareness and appropriate epidemiological and vector surveillance are essential.

关键词： Dengue Yellow fever Chikungunya Zika Risk factors Urban areas Sub-Saharan Africa

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A review of the risk of cholera outbreaks and urbanization in sub-Saharan Africa

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Journal of Biosafety and Biosecurity 2020年第2期2卷 71-76页

作者： Alexandre Zerbo rafael Castro Delgado Pedro Arcos gonzalez Unit for Research in Emergency and Disaster Faculty of Medicine and Health SciencesUniversity of Oviedo33006 OviedoSpain

The sub-Saharan region of Africa is rapidly urbanizing,that has consequently spurred the development of specific challenges in terms of access to basic services and ***,exposure to waterborne diseases,including cholera,has been a recurrent problem for the people residing in these urban *** is important to understand the different risks faced by people in urban areas as it might aid in preventing and controlling the spread of the disease.A review of literature was conducted,using specific selection criteria to obtain relevant publications that described the risk factors for cholera outbreak in urban areas of sub-Saharan Africa.A perusal of available literature indicated that despite the heterogeneity in the urban areas of Africa,there are similarities with respect to the risk factors associated with the incidence of cholera *** risk factors include geographical location,hydroclimatic parameters,urban environment,genomics of the Vibrio cholerae virulence,sanitation,and human behavior.A succinct comprehension of the possible relationship between the different risk factors might prove to be helpful in managing the cholera epidemic.

关键词： Cholera Urban environment Sub-Saharan Africa

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