Introducción: muchas personas tienen en el trasplante de órganos su única alternativa para lograr sobrevivir con una buena calidad de vida. Sin embargo, existe una gran escasez de órganos para trasplantes, y México posee una de las tasas más bajas de donación. El personal de medicina y de enfermería está en contacto con los familiares de los posibles donadores y son personas clave para facilitar el proceso de donación de órganos post mortem. El objetivo de este estudio fue explorar el conocimiento y las actitudes hacia la donación de órganos en estudiantes mexicanos de medicina y enfermería. Materiales y métodos: trescientos ochenta y cuatro estudiantes contestaron dos cuestionarios: uno sobre conocimientos y otro sobre actitudes hacia la donación de órganos. Resultados: los participantes mostraron un nivel de conocimiento inadecuado, especialmente los estudiantes de enfermería. Muchos de ellos creían que es posible recuperarse de la muerte cerebral. La mayoría de los estudiantes creen erroneamente que hay un límite de edad para donar y que las religiones que prevalecen en México se oponen a la donación de órganos. Hubo una correlación negativa entre conocimientos y actitudes desfavorables hacia la donación de órganos. Conclusiones: es necesario revisar los programas de estudio, a fin de asegurar que los futu- ros profesionales de la salud estén adecuadamente preparados para promover la donación y reducir la escasez de órganos.

Introducción: este artículo analiza la llegada de la pandemia de influenza asiática a Brasil a partir de la noticia publicada entre junio y septiembre de 1957 en la prensa de la ciudad de Río de Janeiro, entonces capital federal. Las fuentes utilizadas son tres de los diarios más importantes y dos revistas semanales disponibles en línea. Desarrollo: el artículo acompaña tres meses de información, informes y opiniones sobre el surgimiento y crecimiento de la pandemia en Asia, Estados Unidos, Europa y Suramérica; la amenaza de su ingreso al país y las acciones del gobierno federal, y los primeros casos registrados en Río de Janeiro a principios de septiembre. Analiza la pandemia en Brasil a través de la lente del periodismo, abordando las percepciones e incertidumbres sobre la enfermedad y los preparativos de los gobiernos, así como de las instituciones científicas y médicas. El artículo aborda las evaluaciones y críticas a la actuación del Gobierno, las repercusiones de los primeros casos sospechosos y confirmados en América del Sur y las dudas sobre la capacidad del Ministerio de Salud para responder a la epidemia. Conclusiones: el artículo destaca el papel central de la prensa y los medios de comunicación en la configuración de la epidemia como un evento social y político antes de que ocurriera como un evento biomédico.

Introducción: este artículo pretende estudiar las medidas tomadas en las epidemias de viruela de Santiago (1787), Concepción (1789) y Santafé (1782/1802), para compararlas y entender cómo el estudio de estas epidemias nos puede dar luces para el abordaje del reto de salud pública actual: la pandemia de covid-19. Desarrollo: el artículo está dividido en tres partes: en la primera se exponen las medidas de higiene que se tomaron para subsanar y prevenir estas epidemias, previas a la llegada de la vacunación, comparando el rol desempeñado por los actores locales en cada región; en la segunda se relata y se compara el proceso de llegada y búsqueda de la vacuna contra la viruela en cada territorio, y en la tercera se reflexiona brevemente sobre la pandemia actual. Conclusiones: en el análisis comparativo, se destaca la manera en la que la agenda transcolonial incluye una serie de similitudes para su aplicación en cada territorio, pero también las diferencias que los procesos locales y transcoloniales plantean para su domesticación en cada uno de ellos. Además, se resaltan las particularidades que ha tenido la pandemia de covid-19 y las lecciones que este estudio de caso deja para pensar en la necesidad de enfrentarla desde una perspectiva global.

Objetivo: analizar la disputa intelectual entre el médico Cosme Mariano Argerich y el profesor de Filosofía Juan Crisóstomo Lafinur. El debate, situado en el espacio porteño y registrado en el diario El Americano, se originó por la introducción de nuevas enseñanzas ligadas al sensualismo y a la Fisiología francesa en el Colegio de la Unión del Sud en 1819. Desarrollo: se desea demostrar la existencia de un proceso de apropiación de saberes de estos actores locales según sus intereses y posicionamientos. Conclusiones: el propósito de Argerich y Lafinur era construir argumentaciones con el fin de convencer a una incipiente opinión pública de las propuestas del sensualismo y de la Fisiología de Magendie, respectivamente. En su afán por vencer en la discusión, ambos personajes perfeccionaron tanto sus demostraciones, que se puede observar un registro discursivo distinto respecto a las nociones originales de los autores europeos.

Publicado por vez primera en 1979, «Terminología médica» ha proporcionado tanto al estudiante de medicina como al médico propiamente forma¬do, un amplio panorama acerca de síntomas, signos, tratamientos, nómina anatómica y demás aspectos cuya definición e identificación se han modificado con el paso de los años.

To improve cardiovascular implant success, metal-based stents are designated to modulate endothelial cells adhesion and migration in order to prevent restenosis and late thrombosis diseases. Biomimetic coatings with extra-cellular matrix adhesive biomolecules onto stents surfaces are a strategy to recover a healthy endothelium. However, the appropriate bioactive sequences to selective promote growth of endothelium and the biomolecules surface immobilization strategy remains to be elucidated. In this study, biofunctionalization of cobalt chromium, CoCr, alloy surfaces with elastin-like recombinamers, ELR, genetically modified with an REDV sequence, was performed to enhance metal surfaces endothelialization. Moreover, physical adsorption and covalent bonding were used as biomolecules binding strategies onto CoCr alloy. Surfaces were activated with plasma and etched with sodium hydroxide previous to silanization with 3-chloropropyltriethoxysilane and functionalized with the ELR. CoCr alloy surfaces were successfully biofunctionalized and the use of an ELR with an REDV sequence, allows conferring bioactivity to the biomaterials surface, demonstrating a higher cell adhesion and spreading of HUVEC cells on the different CoCr surfaces. This effect is emphasized as increases the amount of immobilized biomolecules and directly related to the immobilization technique, covalent bonding, and the increase of surface charge electronegativity. Our strategy of REDV elastin-like recombinamers immobilization onto CoCr alloy surfaces via covalent bonding through organosilanes provides a bioactive surface that promotes endothelial cell adhesion and spreading.

Hydrogenosomes and mitosomes represent remarkable mitochondrial adaptations in the anaerobic parasitic protists such as Trichomonas vaginalis and Giardia intestinalis, respectively. In order to provide a tool to study these organelles in the live cells, the HaloTag was fused to G. intestinalis IscU and T. vaginalis frataxin and expressed in the mitosomes and hydrogenosomes, respectively. The incubation of the parasites with the fluorescent Halo-ligand resulted in highly specific organellar labeling, allowing live imaging of the organelles. With the array of available ligands the HaloTag technology offers a new tool to study the dynamics of mitochondria-related compartments as well as other cellular components in these intriguing unicellular eukaryotes.

Background: Physicians face intrinsic tensions when practicing medicine; therefore, extrinsic factors that could affect distress, such as payment methods, need to be assessed. The study objectives were to: compare levels of distress by payment method, identify factors predicting distress in a two-level regression model, and explore interactions between predictors of distress and payment method. Methods: A cross-sectional study was conducted among physicians in the Saskatoon Health Region, Saskatchewan. Physicians completed a pre-tested questionnaire about their distress. Analysis of variance was used to compare distress levels of physicians paid by fee-for-service (FFS), alternative payment plans (APPs), and blended methods. A mixed linear regression model was built to predict distress with geographical area of practice as the random component. Demographics, workload, complexity of patients, payment method, career satisfaction, and practice profile were the independent variables. The interactions between payment method and predictors of daily distress were evaluated. Results: A total of 382 physicians participated. Response bias was tested and found to be negligible. In the multivariable analysis, payment method was a predictor of distress which interacted with the proportion of complex cases. Lower levels of distress were found among physicians who had more than 75% of patients with complex conditions and were paid by APPs, compared to those paid by FFS and blended methods. Career satisfaction was found to be an important predictor. Nine percent of the outcome variation was explained by geographic area of practice. Conclusions: Payment method is a predictor of distress when adjusting by confounders, interacting with proportion of complex cases. APPs may promote provision of care for patients with complex conditions. Career satisfaction can be considered a protective indicator of distress. Practice environment influences distress experienced by physicians.

Background Retinopathy of prematurity is the major cause of blindness in children in Colombia. This cause of childhood blindness is irreversible when stablished, but 100% preventable with the adequate strategies put in place. This raises important questions concerning strategies to reduce the incidence of blindness as a result of ROP, which should ensure that all infants who are at risk of blinding ROP are examined in screening programmes. Aim The aim was to collect data in the neonatal intensive care units. This was used to evaluate the existing human and material resources for preventing, screening and treating ROP and rehabilitation of children suffering from ROP. The data helped to do an analysis of gaps in the service and allowed to present a proposal for a programme to prevent blindness due to ROP in the cities of Manizales, Pereira and Armenia, Colombia. Methods 7 NICUs were visited in the three cities. The study collected quantitative data on neonatal intensive care units, admission and survival of premature babies during 2010, human resources and infrastructure and data on knowledge of the Colombian guidelines on ROP. Results The survival rates vary according to the provider. They are higher in the private sector, and lower in the public sector. Overall, the available data allowed us to estimate that there are approximately 45,000 births per year (2010) in the region (95% occur in hospital) and 1.8% of all the births are less than 2,000g. Therefore, in the region, 810 babies per year weighing less than 2,000g are at risk of developing any type of ROP. The number of places, ventilators and monitors is sufficient. Staffing is adequate in the private NICUs, with a shortage of neonatologists in the public NICUs. The number of nurses monitoring babies is universally adequate, but the lack of knowledge in controlling risk factors of developing ROP such as monitoring oxygen in a constraint. An ROP screening programme is not available in public NICUs and in some of the mixed providers. The Kangaroo Mother programme lack of screening for ROP. Conclusions The unstable health system has allowed (i) unsustainable NICUs and programmes for ROP (ii) If available, programmes running without being monitored or evaluated, and, (iii) no screening in public and some mixed NICUs in Manizales, Pereira and Armenia. (iv) no screening for ROP in the Kangaroo Mother Programe As access and survival rates improve in the NICUS of these cities, ROP is likely to continue to be a significant cause of blindness in the region, despite the progress that has been achieved with the 2010 Colombian guidelines for screening and treating ROP. Recommendations The results suggest that the prevention of blinding ROP is a complex task in Colombia that requires concomitant strategies to be put in place: Firstly, national policies in screening for ROP and oxygen delivery for the babies in the NICUs are needed. Secondly, as a primary preventive strategy, training nurses in the NICUs to control and monitor the delivery of oxygen; as a secondary preventive strategy, ROP programmes offered to the public, mixed, private NICUs and to the Kangaro Mother Programme; as a tertiary strategy, rehabilitation providing a low vision centre for these children Thirdly, running ROP programmes need to be monitored and evaluated.

Background: Health care–associated infections (HAIs) are a public health problem that increase health care costs. This article aimed to systematically review the literature and meta-analyze studies investigating risk factors (RFs) independently associated with HAIs in hospitalized adults. Methods: Electronic databases (MEDLINE, Embase, and LILACS) were searched to identify studies from 2009-2016. Pooled risk ratios (RRs) or odds ratios (ORs) or mean differences (MDs) and 95% confidence intervals (CIs) were calculated and compared across the groups. This review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement. Results: Of 867 studies, 65 met the criteria for review, and the data of 18 were summarized in the meta-analysis. The major RFs independently associated with HAIs were diabetes mellitus (RR, 1.76; 95% CI, 1.27-2.44), immunosuppression (RR, 1.24; 95% CI, 1.04-1.47), body temperature (MD, 0.62; 95% CI, 0.41-0.83), surgery time in minutes (MD, 34.53; 95% CI, 22.17-46.89), reoperation (RR, 7.94; 95% CI, 5.49-11.48), cephalosporin exposure (RR, 1.77; 95% CI, 1.30-2.42), days of exposure to central venous catheter (MD, 5.20; 95% CI, 4.91-5.48), intensive care unit (ICU) admission (RR, 3.76; 95% CI, 1.79-7.92), ICU stay in days (MD, 21.30; 95% CI, 19.81-22.79), and mechanical ventilation (OR, 12.95; 95% CI, 6.28-26.73). Conclusions: Identifying RFs that contribute to develop HAIs may support the implementation of strategies for their prevention, therefore maximizing patient safety.