SARS-CoV-2 Spillback to Wild Coatis in Sylvatic-Urban Hotspot, Brazil.

We tested coatis (Nasua nasua) living in an urban park near a densely populated area of Brazil and found natural SARS-CoV-2 Zeta variant infections by using quantitative reverse transcription PCR, genomic sequencing, and serologic surveillance. We recommend a One Health strategy to improve surveillance of and response to COVID-19.

Ações de educação interprofissional desenvolvidas no contexto dos cursos de graduação em saúde no Brasil: uma revisão integrativa / Acciones de educación interdisciplinar desarrolladas en el contexto de los cursos de pregrado en salud en Brasil: una revisión integrativa / Interprofessional Education Actions Developed in the Context of Undergraduate Health Courses in Brazil: An Integrative Review

Introdução: um grande esforço no âmbito das graduações na área da saúde tem sido feito para reorientar a formação profissional de modo a atender às reais necessidades de saúde da população com vistas a alcançar uma formação mais humanizada e desenvolvida com a inclusão de diferentes métodos de ensino-aprendizagem. Objetivo: identificar na literatura científica as ações de educação interprofissional no contexto dos cursos de graduação em saúde desenvolvidas no Brasil. Método: trata-se de uma revisão integrativa de literatura constituída a partir de uma busca realizada em sete recursos informacionais e que resultou numa amostra total de 20 artigos analisados de forma descritiva e a partir da Análise de Conteúdo. Resultados: as informações extraídas dos artigos analisados puderam ser organizados em três temas: 1) os benefícios da integração das disciplinas e diferentes profissões; 2) a operacionalização de estratégias pedagógicas voltadas a consecução da interprofissionalidade; 3) e desafios para a integração dos cursos e profissões. Considerações finais: identificou-se que a educação interprofissional tem sido incorporada nos cursos de graduação em saúde no Brasil permitindo a transformação do ensino na área da saúde, gerando rompimento dos paradigmas tradicionais que permeiam os campos da saúde e da educação, oportunizando a integração entre os saberes e os campos de formação.

Introducción: se ha hecho un gran esfuerzo en el ámbito de pregrado en el área de la salud para reorientar la formación profesional de modo tal que atienda las necesidades reales de salud de la población con miras a alcanzar una formación más humanizada y desarrollada con inclusión de diferentes métodos de enseñanza-aprendizaje. Objetivo: identificar en la literatura científica las acciones de educación interdisciplinar en el contexto de los cursos de pregrado en salud desarrollados en Brasil. Método: se trata de una revisión integrativa de literatura constituida a partir de una búsqueda realizada en siete recursos informacionales y que arrojó una muestra total de 20 artículos analizados de forma descriptiva y a partir del Análisis de Contenido. Resultados: la información extraída de los artículos analizados pudo ser organizada alrededor de tres temas: 1) los beneficios de la integración de las disciplinas y diferentes profesiones; 2) la operacionalización de estrategias pedagógicas volcadas a la consecución de la interdisciplinariedad; 3) y desafíos para la integración de los cursos y profesiones. Consideraciones finales: se identificó que la educación interdisciplinar ha sido incorporada en los cursos de pregrado en salud en Brasil permitiendo la transformación de la enseñanza en el área de la salud, generando ruptura con los paradigmas tradicionales que permean los campos de la salud y de la educación, posibilitando la integración entre los saberes y los campos de formación.

Introduction: a great effort has been made in the field of Health graduation courses to reorient professional education to meet the real health needs of the population, aiming at a more humanized and developed education, with the inclusion of different teaching-learning methods. Objective: to identify in the scientific literature the actions of interprofessional education in the context of Health graduation courses developed in Brazil. Method: integrative review of the literature constituted from a search in seven databases, which resulted in a total sample of twenty articles analyzed descriptively and from content analysis. Results: the information extracted from the analyzed articles could be organized into three themes: 1) the benefits of integrating disciplines and different professions; 2) the operationalization of pedagogical strategies aimed at achieving interprofessionalism; 3) challenges for the integration of courses and professions. Final considerations: it was identified that interprofessional education has been incorporated into undergraduate courses in Health in Brazil, which allows the transformation of teaching in the area of Health, thus generating a break in the traditional paradigms that permeate the fields of health and education, thus providing opportunities for integration between the fields of knowledge and training.

COVID-19 distress affects healthcare and administrative workers equally at a tertiary hospital center in Brazil.

Introduction: The COVID-19 outbreak exposes healthcare workers to an increased risk of distress and psychiatric symptoms. Objectives: To evaluate psychological suffering and mental disorders among healthcare workers at a tertiary hospital, a referral center for COVID-19 treatment. Methods: An observational, cross-sectional, quantitative study with descriptive methodology. Fifty-eight healthcare workers who attended consultations at the hospital's Mental Health Outpatient Clinic were included. The study was carried out after approval by the research ethics committee at the Faculdade de Medicina de São José do Rio Preto (32665020.3.0000.5415). Results: 81% were women, mean age was 38.98±10.6 years, 20 (34.5%) were administrative staff, 24 (41.4%) were attending a first consultation, and 28 had had previous psychiatric attention at other services. Sixteen (28%) reported new symptoms during the pandemic, with anxious (10), irritable (3), and depressive (2) symptoms being the most frequent. Anxiety (26) and depressive disorders (19) were the most prevalent. As for exposure to news, the most common feelings were fear (19) and anguish or concern (9). The most common feelings associated with the pandemic were fear and recurrent thoughts of social and economic impact (27). The main reflections were about the meaning of life (17), human vulnerability (11), and the importance of the family (7). Regarding prospects for the future, 70.7% (41) reported hope for improvement. Conclusions: Initial data suggest a high prevalence of anxiety and depressive symptoms, as well as sleep disturbances, regardless of work team. Fear of death and uncertainty about the future are also prevalent. These data reinforce the importance of developing strategies to reduce the risks to this population's mental health.

Supply of Antioxidants vs. Recruit Firefighters' Cellular Immune Status: A Randomized Double-Blinded Placebo-Controlled Parallel-Group Trial.

Background: Physical exercise can affect the immune system. We studied the effect of antioxidants on hematological and immune biomarkers after heavy training. Methods: 24 well-trained and well-fed male firefighters were randomly divided into supplemented and placebo groups, and tested for immunology-related variables using venous blood samples in the fasting state, pre- (M1) and post- (M2) five weeks of daily micronutrient supplementation (15 mg of beta-carotene, 200 mg of vitamin C, 136 mg of vitamin E, 200 µg of selenium, 15 mg of zinc, 100 mg of magnesium). Total leukocytes and a differential count for five populations were determined using standard procedures (MAXM­Beckman Coulter Diagnostics; Brea, CA, USA). Lymphocyte subsets were determined through immunophenotyping. Results: Although all values were within the normal range for healthy adults and athletes in the supplemented group (SG), mean CD3+CD8+, CD8+ and CD16+CD56+ decreased (p < 0.05; small to moderate effects), while mean CD4+, CD19+ and CD4+/CD8+ increased (p < 0.05; small effects) after five-weeks. Regarding the placebo group (PG), higher total leukocyte count (p < 0.05; trivial effect) and natural killer cells percentage (CD16+CD56+; p < 0.05; moderate effect) were observed when comparing M1 and M2. Conclusions: Antioxidants supplementation did not alter well-fed male firefighters recruit firefighters' immune cell response during the five-week physical training program.

A multi-analytical characterization of fourteenth to eighteenth century pottery from the Kongo kingdom, Central Africa.

Pottery traditions reflect the socioeconomic framework of past cultures, while the spatial distribution of pottery indicates exchange patterns and interaction processes. Material and earth sciences are employed here to determine raw material sourcing, selection and processing. The Kongo kingdom, internationally renowned since the late fifteenth century, is one of the most famous precolonial states in Central Africa. Despite the large number of historical studies relying on African and European oral and written chronicles, there are still considerable gaps in our current understanding of this political unit. Here, we provide new insights into pottery production and circulation within the Kongo kingdom. Implementing a multi-analytical approach, namely XRD, TGA, petrographic analysis, XRF, VP-SEM-EDS and ICP-MS, on selected samples, we determined their petrographic, mineralogical and geochemical signatures. Our results allowed us to correlate the archaeological objects to naturally occurring materials and to establish ceramic traditions. We identified production templates, exchange patterns, distribution of high-quality goods and interaction processes through technological knowledge transmission. Our results demonstrate that political centralisation in the Lower Congo region of Central Africa had a direct impact on pottery production and circulation. We expect our study to provide a sound basis for further comparative research to contextualise the region.

Assessing species reintroduction sites based on future climate suitability for food resources.

The reintroduction of a species that is extinct in the wild demands caution because reintroduction locations may be associated with threats, such as hunting, poor-quality habitat, and climate change. This is the case for Cyanopsitta spixii (Spix's Macaw), which has been extinct in the wild since 2000. The few living individuals were created in captivity and will be used in a reintroduction project within the species' original distribution area, the Caatinga domain (Brazil). Because the occurrence records for this bird are old and inaccurate, we investigated the current and future environmental suitability of the 14 plant species used by C. spixii as resource. These plants are key elements for the long-term reestablishment of the species in the wild, so the use of models helps in the assessment of the effects of climate change on the availability of these resources for the species and informs selection of the best places for reintroduction. We based our models of environmental suitability on 19 bioclimatic variables and nine physical soil and topography variables. Climate projections were created for the present and for the year 2070 with an optimistic (SSP2-4.5) and a pessimistic (SSP5-8.5) climate scenario. Both future climate scenarios lead to a reduction in area of environmental suitability that overlapped for all the plant species: 33% reduction for SSP2-4.5 and 63% reduction for SSP5-8.5. If our projections materialize, climate change could thus affect the distribution of key resources, and the maintenance of C. spixii would depend on restoration of degraded areas, especially riparian forests, and the preservation of already existing natural areas. The Caatinga domain is very threatened by habitat loss and, for the success of this reintroduction project, the parties involved must act to protect the species and the resources it uses.

Evaluación de los Sitios de Reintroducción de Especies con base en la Futura Idoneidad Climática para los Recursos Alimenticios Resumen La reintroducción de una especie que se encuentra extinta en vida libre exige precaución pues las localidades de reintroducción pueden estar asociadas con amenazas como la cacería, hábitats de mala calidad y el cambio climático. Éste es el caso para Cyanopsitta spixii (Guacamaya de Spix), que ha estado extinta en vida libre desde el 2000. Los pocos individuos vivos nacieron en cautiverio y se usarán para un proyecto de reintroducción dentro del área original de distribución de la especie: el dominio Caatinga (Brasil). Ya que los registros de la presencia de esta ave son viejos e imprecisos, investigamos la idoneidad ambiental actual y a futuro de 14 especies de plantas que C. spixii usa como recurso. Estas plantas son elementos importantes para el restablecimiento a largo plazo de las especies en vida silvestre, así que el uso de modelos asiste en la evaluación de los efectos del cambio climático sobre la disponibilidad de recursos para la especie e informa la selección de los mejores lugares para la reintroducción. Basamos nuestros modelos de la idoneidad ambiental en 19 variables bioclimáticas y 9 variables físicas del suelo y la topografía. Las proyecciones climáticas fueron creadas para el presente y para el año 2070 con un escenario climático optimista (SSP2-4.5) y uno pesimista (SSP5-8.5) Ambos escenarios climáticos futuros llevan a una reducción en el área de idoneidad ambiental sobrepuesta para todas las especies de plantas: 33% de reducción para SSP2-4.5 y 63% de reducción para SSP5-8.5. Si nuestras proyecciones se materializan, el cambio climático podría entonces afectar la distribución de los recursos importantes, por lo que la conservación de C. spixii dependería de la restauración de las áreas degradadas, especialmente los bosques riparios y la preservación de las áreas naturales existentes. El dominio Caatinga se encuentra muy amenazado por la pérdida del hábitat y, para el éxito de este proyecto de reintroducción, las partes involucradas deben actuar para proteger a la especie y los recursos que utiliza.

Twenty Years after Bovine Vaccinia in Brazil: Where We Are and Where Are We Going?

Orthopoxvirus (OPV) infections have been present in human life for hundreds of years. It is known that Variola virus (VARV) killed over 300 million people in the past; however, it had an end thanks to the physician Edward Jenner (who developed the first vaccine in history) and also thanks to a massive vaccination program in the 20th century all over the world. Although the first vaccine was created using the Cowpox virus (CPXV), it turned out later that the Vaccinia virus was the one used during the vaccination program. VACV is the etiological agent of bovine vaccinia (BV), a zoonotic disease that has emerged in Brazil and South America in the last 20 years. BV has a great impact on local dairy economies and is also a burden to public health. In this review, we described the main events related to VACV and BV emergence in Brazil and South America, the increase of related scientific studies, and the issues that science, human and animal medicine are going to face if we do not be on guard to this virus and its disease.

In vivo anti-inflammatory activity of Fabaceae species extracts screened by a new ex vivo assay using human whole blood.

INTRODUCTION: Plants have been considered a promising source for discovering new compounds with pharmacological activities. The Fabaceae family comprises a large variety of species that produce substances with diverse therapeutic potential, including anti-inflammatory activity. The limitations of current anti-inflammatories generate the need to research new anti-inflammatory structures with higher efficacy as well as develop methods for screening multiple samples, reliably and ethically, to assess such therapeutic properties. OBJECTIVE: Validate and apply a quantification method for prostaglandin E2 (PGE2 ) production from an ex vivo assay in human blood in order to screen anti-inflammatory activity present in many Fabaceae species extracts. METHODS: Human blood was incubated with extracts from 47 Fabaceae species. After lipopolysaccharide (LPS)-induced inflammation, PGE2 was quantified in the plasma by liquid chromatography with tandem mass spectrometry (LC-MS/MS). The extracts that presented PGE2 production inhibition were further assessed through in vivo assay and then chemically characterised through an analysis of ultra-performance liquid chromatography electrospray ionisation quadrupole time-of-flight tandem mass spectrometry (UPLC-ESI-QTOF-MS2 ) data. RESULTS: The new ex vivo anti-inflammatory assay showed that five out of the 47 Fabaceae species inhibited PGE2 production. Results from an in vivo assay and the metabolic profile of the active extracts supported the anti-inflammatory potential of four species. CONCLUSION: The quantification method for PGE2 demonstrated fast, sensitive, precise, and accurate results. The new ex vivo anti-inflammatory assay comprised a great, reliable, and ethical approach for the screening of a large number of samples before an in vivo bioassay. Additionally, the four active extracts in both ex vivo and in vivo assays may be useful for the development of more efficient anti-inflammatory drugs.

Detection of SARS-CoV-2 RNA on public surfaces in a densely populated urban area of Brazil

ImportanceThe COVID-19 pandemic has resulted in more than 3.5 million cases and 245 thousand deaths worldwide as of May 6, 2020. Determining the extent of the presence of the virus on public surfaces is critical for understanding the potential risk of infection in these areas. ObjectiveTo evaluate the presence of SARS-CoV-2 RNA on public surfaces in a densely populated urban area in Brazil. Design and SettingA total of 101 samples were collected from different surfaces in public places in the region of Belo Horizonte with the highest number of COVID-19 cases. Samples were collected near the hospital and public transportation areas using sterile swabs, and then submitted to nucleic acid extraction and genomic detection and quantification by one-step qPCR. ResultsSeventeen of the 101 samples tested positive (16.8%) for SARS-CoV-2 RNA, including samples from bus stations/terminals, public squares, and sidewalks, including those near hospitals. Conclusions and RelevanceOur data indicated the contamination of public surfaces by SARS-CoV-2, especially near hospital areas, highlighting the risk of infection for the population. Constant monitoring of the virus in urban areas is required as a strategy to fight the pandemic and prevent further infections. Key points Question Can SARS-CoV-2 be detected on surfaces in public areas used by a large proportion of the population? FindingsSARS-CoV-2 RNA was detected in different locations, including bus stations/terminals, squares, and sidewalks, especially those near hospitals, in a densely populated area of Belo Horizonte, Brazil. MeaningThis study highlights the need for constant monitoring for the presence of SARS-CoV-2 RNA in urban areas to support better strategies to fight the COVID-19 pandemic and prevent further infections.

Perfil de funcionamento do SAD, Serviço de Apoio Domiciliário-caso de Braga, Portugal / Operating profile of SAD, Home Support Service, in the case of Braga, Portugal / Perfil operativo de SAD, Servicio de asistencia domiciliaria, en el caso de Braga, Portugal

O SAD português carateriza-se por um perfil tradicional. Reúne como principais caraterísticas funcionar de segunda a sexta-feira, com uma intensidade considerada baixa, com a prestação de cuidados voltadapara as AVD ́S, Atividades de vida diária dos idosos.Objetivos desteestudo: (i)identificar a oferta da estrutura de cuidados existentes,prestada pelo SAD, nas InstituiçõesParticulares de Solidariedade Social (IPSS)especificamentedo distrito de Braga (Portugal);e (ii) analisar seu perfil de funcionamento,com base nos comportamentos de gestãoe na existência ou não dos planos de cuidados no SAD.A metodologia utilizada foi a quantitativa, recorrendo-seà aplicação de inquéritos por questionário, por meiodo instrumento de avaliação,Protocolo de Serviço de Apoio Domiciliário, versão 2. A amostra foipor conveniência,composta pelos20 diretores técnicos das IPSS deBraga,Portugal.Como conclusões, oestudo aponta para um SAD tradicional, rural, com função assistencial, visando asatisfazer as AVD ́S, com declínio funcional, muito idosos,ou com idade inferior aos 65 anos,havendoa necessidade de completar a avaliação multidimensional realizada,e distribuir as tarefas executadas ainda centralizadas na figura do diretor técnico. São apontadas três prioridades:pensar numa boa gestão e rentabilização de recursos humanos; trabalhar os planos de cuidados com a área da saúde e a retaguarda familiar como principal enfoque;e uniformizar os critérios de exclusão e inclusão de acesso ao SAD,ostão importantes critérios de elegibilidade, dando lugar à implementação de um modelo de SAD que se baseienos cuidados pessoais individualizadoscom base na classificação do Rai Home Care.

The Portuguese SAD is characterized by a traditional profile. Its maincharacteristics are to operate from Monday to Friday, with a low intensity, with theprovision of care for ADLs, activities of daily living of the elderly. Objectives of this study:(i) to identify the provision of the existing care structure provided by SAD in the PrivateSocialSolidarity Institutions (IPSS) specifically in thedistrict of Braga (Portugal); and (ii) analyze itsoperating profile, based on managementbehaviors and the existence or otherwise ofcare plans in the DSS. The methodology usedwas quantitative, using surveys by means ofthe assessment instrument, Protocol of HomeSupport Service, version 2. The sample wasfor convenience, composed by the 20technical directors of Braga IPSS, Portugal. As conclusions, the study points to atraditional, rural DSS, with care function,aiming to satisfy the ADLs, with functionaldecline, very elderly, or under 65 years old,with the need to complete themultidimensional assessment performed, anddistribute the tasks performed still centered onthe technical director. Three priorities arepointed out: think about good managementand profitability of human resources; work withhealth care and family care plans as the mainfocus; and standardize the exclusion andinclusion criteria for access to SAD, the all-important eligibility criteria, leading to theimplementation of a model of SAD that isbased on individualized personal care basedon the Rai Home Care classification.

El SAD portugués se caracteriza por un perfil tradicional. Suscaracterísticas principales son operar de lunes a viernes, de baja intensidad, con laprestación de atención para las AVD, actividades de la vida cotidiana de los ancianos. Objetivos de este estudio: (i) identificar la provisión de la estructura de atención existenteproporcionada por SAD en las Instituciones Privadas de Solidaridad Social (IPSS)específicamente en el distrito de Braga (Portugal); y (ii) analizar su perfil operativo, enfunción de los comportamientos de gestión y la existencia o no de planes de atención en el DSS. La metodología utilizada fue cuantitativa, utilizando encuestas por medio delinstrumento de evaluación, Protocolo de Servicio de Apoyo a Domicilio, versión 2. La muestra fue por conveniencia, compuesta por los 20 directores técnicos de Braga IPSS,Portugal Como conclusiones, el estudio apunta a un DSS rural tradicional, con función asistencial, con el objetivo de satisfacer las AVD, con deterioro funcional, muy ancianoso menores de 65 años, con la necesidad de completar la evaluación multidimensionalrealizada, y distribuir las tareas aún en marcha centralizados en la figura del director técnico. Se identifican tres prioridades: pensar en una buena gestión y uso de los recursoshumanos; planes de trabajo de cuidar la salud y antecedentes familiares como el foco principal; y estandarizar los criterios de exclusión e inclusión para el acceso a SAD, loscriterios de elegibilidad más importantes, que conducen a la implementación de un modelo de SAD que se basa en el cuidado personal individualizado basado en laclasificación Rai Home Care.

Male with myelofibrosis and ulceronecrotic lesions.

OBJECTIVE: Granulocytic sarcoma also called myeloid sarcoma is an extramedullary tumour of immature granulocytic cells. It is a rare entity, and mostly accompanied by acute myeloid leukaemia. It is observed during the course of myeloproliferative disorders especially in chronic myeloid leukaemia and myelodysplastic syndromes. CONCLUSIONS: Here, we report a case of a 60-year-old male with past history of myelofibrosis admitted to the emergency room due ulceronecrotic lesions, fever and dysphagia. We emphasize the importance of recognizing this entity and its severity.

Male with myelofibrosis and ulceronecrotic lesions

SUMMARY Granulocytic sarcoma also called myeloid sarcoma is an extramedullary tumour of immature granulocytic cells. It is a rare entity, and mostly accompanied by acute myeloid leukaemia. It is observed during the course of myeloproliferative disorders especially in chronic myeloid leukaemia and myelodysplastic syndromes. Here, we report a case of a 60-year-old male with past history of myelofibrosis admitted to the emergency room due ulceronecrotic lesions, fever and dysphagia. We emphasize the importance of recognizing this entity and its severity.

RESUMO O sarcoma granulocítico, também chamado de sarcoma mieloide, é um tumor extramedular de células granulocíticas ¡maturas. É uma entidade rara, e principalmente acompanhada de leucemia mieloide aguda. É observado durante o transtorno mieloproliferativo, especialmente na leucemia mieloide crónica e síndromes mielodisplásicas. Aqui, relatamos um caso de um homem de 60 anos com antecedente de mielofibrose admitida na sala de emergência devido a lesões ulceronecróticas, febre e disfagia. Enfatizamos a importância de reconhecer essa entidade e sua gravidade.

Acute paracoccidioidomycosis with duodenal and cutaneous involvement and obstructive jaundice.

Paracoccidioidomycosis (PCM) is the most widespread endemic mycosis in LatinAmerica. If PCM is not diagnosed and treated early and adequately, the endemic fungal infection could result in serious sequelae. We report a case of PCM with duodenal and cutaneous involvement simulating cholangitis that was initially misdiagnosed as a lymphoproliferative disease. Clinicians should consider acute paracoccidioidomycosis in the differential diagnosis of jaundice and/or signs/symptoms of cholangitis developing in young patients from paracoccidioidomycosis endemic regions.

Sawdust Derivative for Environmental Application: Chemistry, Functionalization and Removal of textile dye from aqueous solution.

The adsorption of Violet Remazol 5R (VR 5) on wood sawdust modified with succinic anhydride (SSA) as a function of contact time, pH, and initial dye concentrations was investigated using a batch technique under ambient conditions. The SSA obtained was confirmed by IR spectroscopy, thermogravimetry and 13C NMR, and degrees of substitution (DS) were calculated. A study on the effect of the pH on the adsorption of VR 5 showed that the optimum pH was 2.0. The interactions were assayed with respect to the pseudo-first-order and pseudo-second-order kinetic models, and were found to follow closely the pseudo-second-order. The isotherm was adjusted to the Langmuir, the Freundlich and the Temkin sorption models. SSA is a promising material for the removal of dye textile from aqueous solutions, and under conditions studied the removal percentage achieved was 51.7%.

Effects of electrocautery to provoke endovascular thermal injury / Efeitos do eletrocautério para provocar lesão térmica endovascular

PURPOSE: To investigate the effects of a new electrocautery device to provoke endovascular venous thermal injury. METHODS: An experimental endovascular electrocautery was placed inside eight ex-vivo bovine saphenous veins models. Each one was divided in eight segments and progressive intensities of electric energy liberated. The macroscopic and microscopic effects were analyzed. RESULTS: Forty bovine saphenous veins segments were studied. The higher the electric energy applied the greater the nuclear picnosis and more intense the cytoplasmatic shrinkage and electrocoagulation effects. CONCLUSION: The experimental endovascular electrocautery device demonstrated to be both capable of inducing the destruction of the intimal layers of the studied vein model and provoke endovascular thermal injury.

OBJETIVO: Investigar os efeitos de um modelo experimental de eletrocautério em provocar lesão venosa térmica endovascular. MÉTODOS: O eletrocautério endovascular foi colocado dentro de oito modelos experimentais de veia safena bovina. Cada uma foi dividida em oito segmentos e intensidades progressivas de energia elétrica liberada. Os efeitos macroscópicos e microscópicos foram analisados. RESULTADOS: Foram estudados quarenta segmentos de veia safena bovina. Quanto maior a energia elétrica aplicada pelo eletrocauterizador endovascular maiores foram as alteraçoes de picnose nuclear e mais intensa a retração citoplasmática observada. CONCLUSÃO: O eletrocautério endovascular experimental demonstrou ser capaz de induzir a destruição da camada íntima e provocar lesão térmica endovascular.

Effects of electrocautery to provoke endovascular thermal injury.

PURPOSE: To investigate the effects of a new electrocautery device to provoke endovascular venous thermal injury. METHODS: An experimental endovascular electrocautery was placed inside eight ex-vivo bovine saphenous veins models. Each one was divided in eight segments and progressive intensities of electric energy liberated. The macroscopic and microscopic effects were analyzed. RESULTS: Forty bovine saphenous veins segments were studied. The higher the electric energy applied the greater the nuclear picnosis and more intense the cytoplasmatic shrinkage and electrocoagulation effects. CONCLUSION: The experimental endovascular electrocautery device demonstrated to be both capable of inducing the destruction of the intimal layers of the studied vein model and provoke endovascular thermal injury.