22 research outputs found

    Development of flow focusing device for the visualization of leukocyte rolling adhesion

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    La microfluídica es un área de la microtecnología basada en chips de PDMS que está siendo utilizada cada vez más en multitud de aplicaciones. Una de estas aplicaciones es la investigación biomédica. La microfluídica o “Lab on a Chip” se ha convertido en una manera de realizar experimentos biomédicos y diagnósticos de una manera barata, rápida y eficaz. Cuando se realizan estudios sobre la extravasación leucocitaria utilizando chips microfluídicos, podemos observar la inconsistencia en la trayectoria de rodadura de los leucocitos debido a un flujo laminar. En este trabajo de fin de grado presentamos un método para centrar la interfaz de células en el centro de canal microfluídico. Cuando las células circulan por los sistemas microfluídicos, las células tienden a circular de manera aleatoria por los canales. Por tanto, con el sistema propuesto en este trabajo, dichas células serán redirigidas a la porción central del canal con el fin de recrear el fenómeno de rodadura presente en nuestro sistema circulatorio y así obtener información más detallada. Los resultados de este trabajo muestran la utilidad y la versatilidad de este dispositivo para experimentos relacionados

    Perfil antropométrico del estudiante de primer año de la carrera de educación física de la Universidad Andrés Bello generación 2015

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    Tesis (Profesor de Educación Física, Licenciado en Educación)Realizamos este estudio para conocer el perfil antropométrico con el que ingresan los alumnos de primer año a la carrera de Educación Física de la Universidad Andrés Bello, por lo que se evaluó a un total de 109 estudiantes, de los cuales 63 corresponden al género masculino (68,67%) y 46 al género femenino (50,14%) entre 18 y 25 años. El objetivo principal de esta investigación esta centrado en descubrir cual es el perfil con el que ingresan los estudiantes a la carrera de Educación Física, es por esto que se realizó una medición antropométrica exhaustiva a cada alumno, considerando diferentes métodos de medición. Para obtener el somatotipo utilizamos el método antropométrico descrito por Heath & Carter, realizando también la clasificación del IMC según las normas establecidas. Se espera obtener la mayor información física del sujeto y así identificar el estado en que se encuentran los estudiantes al ingresar a la carrera, y de esta manera ver si tienen un perfil antropométrico saludable, toda la información fue tabulada y analizada con diferentes fórmulas, que arrojaron resultados de IMC, porcentaje de grasa, somatotipo de los sujetos entre otros. Luego de un arduo análisis se llegaron a los resultados, esto indica que la relación de IMC, porcentaje de grasa y somatotipo no concuerdan entre sí con el resultado obtenido, y que no necesariamente los sujetos ingresan con un perfil antropométrico saludable apto para la carrera de Educación Física, se le recomienda a la Universidad realizar test físico transversal, un seguimiento de los sujetos para futuras investigaciones, y de esta forma dar pie para mejorar el nivel de ingreso de sujetos y mantener un perfil adecuado para cada estudiante de la carrera de Educación Física de la Universidad Andrés Bello

    The PREDICTS database: a global database of how local terrestrial biodiversity responds to human impacts

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    Biodiversity continues to decline in the face of increasing anthropogenic pressures such as habitat destruction, exploitation, pollution and introduction of alien species. Existing global databases of species’ threat status or population time series are dominated by charismatic species. The collation of datasets with broad taxonomic and biogeographic extents, and that support computation of a range of biodiversity indicators, is necessary to enable better understanding of historical declines and to project – and avert – future declines. We describe and assess a new database of more than 1.6 million samples from 78 countries representing over 28,000 species, collated from existing spatial comparisons of local-scale biodiversity exposed to different intensities and types of anthropogenic pressures, from terrestrial sites around the world. The database contains measurements taken in 208 (of 814) ecoregions, 13 (of 14) biomes, 25 (of 35) biodiversity hotspots and 16 (of 17) megadiverse countries. The database contains more than 1% of the total number of all species described, and more than 1% of the described species within many taxonomic groups – including flowering plants, gymnosperms, birds, mammals, reptiles, amphibians, beetles, lepidopterans and hymenopterans. The dataset, which is still being added to, is therefore already considerably larger and more representative than those used by previous quantitative models of biodiversity trends and responses. The database is being assembled as part of the PREDICTS project (Projecting Responses of Ecological Diversity In Changing Terrestrial Systems – www.predicts.org.uk). We make site-level summary data available alongside this article. The full database will be publicly available in 2015

    Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

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    Abstract Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

    Nurses' perceptions of aids and obstacles to the provision of optimal end of life care in ICU

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    Contains fulltext : 172380.pdf (publisher's version ) (Open Access

    Incidence and case fatality rate of COVID-19 in patients with inflammatory articular diseases.

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    To describe the incidence and fatality of coronavirus disease 2019 (COVID-19) and identify risk factors to fatality in patients with inflammatory articular diseases (IAD). This is a cross-sectional observational study of IAD patients and COVID-19 with controls matched for age, sex, and RT-PCR. A control group was used to compare the cumulative incidence (CI) and case fatality rate (CFR). The main outcomes of the study were CI and CFR. Other variables included comorbidities, treatments, and characteristics of the COVID-19. Multiple logistic regression analysis was performed to investigate risk factors for fatality in patients with IAD. Of the 1537 patients who fulfilled the inclusion criteria, 23/1537 (1.49%) had IAD 13 (0.8%) had rheumatoid arthritis (RA), 5 psoriatic arthritis (PsA) (0.3%) and 5 axial spondyloarthritis (0.3%). There were no significant differences in CI of COVID-19 and CFR in patients with IAD compared with COVID-19 patients without IAD. In RT-PCR positive patients, the CI of COVID-19 in PsA and AS was higher. Of the 23 IAD patients, 2 RA patients (8.6%) died. The patients did no show characteristics of the COVID-19 disease different from the population. In multivariate analysis, the factor associated with fatality in patients with IAD was older age (OR [95% CI], 1.1 [1.0-1.2]). COVID-19 CI, fatality rate and other features do not seem to be increased in IAD patients. Older age was associated with fatality in patients with IAD

    El héroe entre el mito y la historia

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    Quetzalcóatl, Alejandro Magno, Emiliano Zapata, Inkarrí, Beltrán de Born, Nezahualcóyotl, Cong Hoy y Miguel Hidalgo se cuentan entre las complejas figuras heroicas analizadas en este volumen. La idea de reflexionar sobre el tema «El héroe entre el mito y la historia», en un coloquio organizado por Federico Navarrete y Guilhem Olivier del cual proceden los textos reunidos en este volumen, surgió del interés que, desde hace algunos años, vuelven a despertar las figuras heroicas. La participación de 16 especialistas de disciplinas diferentes -historia, historia del arte, antropología, literatura y lingüistica-constituye el mejor testimonio de la necesidad de un estudio multidisciplinario sobre el héroe y de la riqueza de resultados que se pueden obtener con ese trabajo. La diversidad de los textos reunidos deriva de las diferentes fuentes utilizadas, así como de los variados contextos espaciales y temporales en los cuales se desempeñan esos personajes excepcionales. Para organizar esta rica pluralidad se escogieron ejes de reflexión que buscaban precisar los elementos característicos de los héroes: la relación privilegiada de estas figuras con el espacio y con el tiempo, su significado político o religioso, y su status liminal, entre la norma y la transgresión, entre el mito y la historia, entre lo humano y lo divino, etcétera. Más allá de la riqueza y originalidad de su información histórica y cultural particular, los ensayos de este libro marcan un nuevo paso en el estudio de las figuras heroicas que han dejado huella en la historia de sus pueblos como personajes participativos o bien sus cambios

    Emergence of Fosfomycin Resistance by Plasmid-Mediated <i>fos</i> Genes in Uropathogenic ESBL-Producing <i>E. coli</i> Isolates in Mexico

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    Fosfomycin is currently a viable option against urinary tract infections, particularly against extended-spectrum β-lactamases (ESBL)-producing E. coli, due to its unique mechanism of action and its low resistance among bacteria. The objective of this study was to investigate two of the three most common mechanisms of resistance against this antibiotic among 350 ESBL-producing E. coli strains isolated from the urine of Mexican patients. The prevalence of fosfomycin resistance in our study was 10.9% (38/350). Of all resistant isolates analyzed, 23 (60.5%) were identified as fos-producing organisms, with 14 strains carrying fosA3 and 9, fosA1. Additionally, 11 (28.9%) fosfomycin-resistant isolates presented resistance due to impaired antibiotic transport and 8 (21.0%) both mechanisms. No resistance mechanism investigated in the study was found on 12 strains. All 38 confirmed ESBL-producing isolates carried a blaCTX-M subtype, 36 (94.5%) belonged to the O25b-ST131 clone, and all of them were able to transfer the fosfomycin resistance trait to recipient strains horizontally. This is the first study in Mexico demonstrating a plasmid-mediated fosfomycin resistance mechanism among clinical E. coli strains. Since our results suggest a strong association among fos and blaCTX-M genes and ST131 clones in uropathogenic E. coli, plasmid-mediated fosfomycin resistance should be closely monitored
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