Knowledge and management of WEEE by independent repairers in the city of Bouake in a context of health and environmental risk, 2022

Studies on waste management in Côte d'Ivoire are mostly focused on household and solid waste. It is appropriate to take a sustained look at the management of electrical and electronic equipment waste to better guide policies in this area. This work is a cross-sectional study covering the period from April 1, 2022 to June 30, 2022. The aim was to determine the knowledge and practices of the independent electrical and electronic repairers of the city of Bouaké in terms of electrical and electronic equipment waste (WEEE) management. A comprehensive sample of 307 people was interviewed by means of a questionnaire. The repairers interviewed had already heard of WEEE in 47.2% of cases. They had a good level of knowledge of WEEE in 85.5% of cases. In the final model in multivariate analysis, only the possession of a radio set at home had a significant influence on knowledge of WEEE. Repairers were unaware of the existence of D3E management legislation in 60.7% of cases; apart from humans (84.8%) who were most exposed to the dangers of inappropriate management of WEEE, other entities (air, soil, water, animals) would be polluted according to 36.6, 35.2, 4.1, and 3.4% of repairers, respectively. The most feared type of harm reported is injury (95.65%). Subjects dumped WEEE in a municipal landfill in 32.4% of cases. Sale, empowerment of pre-collection agents, and handing over to a recycling professional, cumulatively represent the most common practice (66.9%).

Reparo de equipamentos elétricos e eletrônicos: estratégia de minimização de resíduos de informática e telefonia móvel / Repair of electrical and electronic equipment: strategy for minimizing computer and mobile phone waste

A produção de Equipamentos Elétricos e Eletrônicos (EEE) tem crescido anualmente e juntamente com ela a geração de Resíduo de Equipamentos Elétricos e Eletrônicos (REEE). A alta complexidade na fabricação dos EEE juntamente com o uso de diferentes materiais torna particularmente difícil a logística reversa dos resíduos gerados. A Política Nacional de Resíduos Sólidos, marco regulatório da gestão de resíduos sólidos no Brasil, estabelece como hierarquia de resíduos: a não geração, redução, reutilização e reciclagem. Uma das estratégias para a redução dos REEE é o uso dos equipamentos até o final de sua vida útil. A estratégia sugerida neste trabalho é o Reparo dos EEE, podendo assim estender seu uso, prolongando sua vida útil e retardando a necessidade do consumo de novo produto similar, contribuindo assim com a minimização da geração de REEE. Essa pesquisa tem o objetivo de analisar a atividade de Reparo como estratégia para reduzir o descarte de resíduos de equipamentos elétricos e eletrônicos pelo mundo, em contraponto com a realidade brasileira. O trabalho desenvolvido em quatro etapas: i) Revisão bibliográfica sistemática sobre Reparo de EEE/REEE; ii) Identificação do posicionamento do Reparo nos processos de valorização de REEE no mundo, com base em revisão bibliográfica; iii) Entrevista com atores da cadeia e análise temática, com base em análise do discurso; e iv) Elaboração de produto técnico-tecnológico para divulgação e incentivo do Reparo de EEE. Os resultados envolvem: i) o estado da arte da atividade de Reparo do REEE, no Brasil e no mundo; ii) conceituação de termos relacionados ao Reparo; iii) interação, barreiras e facilitadores da cadeira de atores do Reparo de EEE como um dos processos de valorização de REEE no Brasil; iv) manual para implantação de evento para divulgação e discussão da atividade de Reparo de EEE como estratégia de minimização de REEE para a sociedade em geral.

The production of Electrical and Electronic Equipment (EEE) has grown annually and along with it the generation of Waste Electrical and Electronic Equipment (WEEE). The high complexity in the manufacturing of EEE along with the use of different materials makes the reverse logistics of the generated waste particularly difficult. The National Policy for Solid Waste, the regulatory framework for solid waste management in Brazil, establishes as waste hierarchy: non-generation, reduction, reuse and recycling. One of the strategies for the reduction of WEEE is the use of equipment until the end of its useful life. The strategy suggested in this work is the repair of EEE, which can extend its use, prolonging its useful life and delaying the need for consumption of a new similar product, thus contributing to the minimization of WEEE generation. This research aims to analyze the Repair activity as a strategy to reduce the disposal of waste electrical and electronic equipment around the world, in contrast with the Brazilian reality. The work is developed in four stages: i) Systematic bibliographic review on Repair of EEE/ WEEE; ii) Identification of the position of the Repair in the processes of valorization of WEEE in the world, based on bibliographic review; iii) Interview with actors of the chain and thematic analysis, based on discourse analysis; and iv) Preparation of a technical-technological product for dissemination and encouragement of EEE Repair. The results involve: i) the state of the art of the EEE Repair activity in Brazil and in the world; ii) conceptualization of terms related to the Repair; iii) interaction, barriers and facilitators of the EEE Repair chain actors as one of the WEEE valorization processes in Brazil; iv) manual for the implementation of an event for the dissemination and discussion of the EEE Repair activity as a WEEE minimization strategy for society in general.

Projects for predictive maintenance and operation between Copet G&T and Gnarus Institute

Abstract The continuity of an electrical system's services is linked to its equipment's correct operation. The more correctly they worked, the higher the quality of the services provided. Thus, they must have their functioning scanned closely and that minor defects have their evolution monitored. This fact creates the possibility of making predictions about how long equipment can operate without compromising the system's continuity. This follow-up is proper for predictive maintenance. This paper presents three on-going COPEL Generation and Transmission projects in essential elements of its electrical system: circuit breakers, lightning arresters, and SF6 substation. The central idea of all monitoring projects is to check the early problem in this equipment and facilities.

Accuracy of Four Electronic Apex Locators During Root Canal Length Determination / Precisión de Cuatro Localizadores de Ápice en la Determinación de la Longitud de Trabajo

ABSTRACT: The apical limit of tooth roots for instrumentation and obturation is a controversial subject due to the high morphological complexity presented by the apical zone of the root. The development of electronic apex locators (EALs) has made working length (WL) determination more predictable, producing more accurate results; however, the interpretation mechanisms of different devices may affect measurements taken under different clinical conditions. One hundred premolars were used to compare the effectiveness of Propex II, Raypex 6, Propex Pixi and Root ZX II in locating the apical foramen (AF). No statistically significant differences were observed when the accuracy of measurement was compared between the different groups of EALs, however Root ZX II and Raypex 6 presented the best overall performance.

RESUMEN: El límite apical radicular para la instrumentación y obturación es un tema controversial, debido a la alta complejidad morfológica que presenta la zona apical de la raíz. El desarrollo de localizadores de ápice electrónicos (EALs) ha hecho la determinación de la longitud de trabajo (WL) más predecible y con resultados más precisos. Sin embargo, el mecanismo de interpretación de cada dispositivo puede afectar la determinación de las mediciones en diferentes condiciones clínicas. Cien premolares fueron utilizados para comparar la efectividad de Propex II, Raypex 6, Propex Pixi y Root ZX II en localizar el foramen apical (AF). No se observaron diferencias estadísticamente significativas cuando se comparó la precisión de medición entre los diferentes grupos de EALs, sin embargo, Root ZX II y Raypex 6 mostraron un mejor desempeño global.

Impacto de la mecatrónica en la medicina / Impact of mechatronic in medicine

Se efectuó una revisión bibliográfica para determinar el impacto de la mecatrónica en el sector de la salud. Se valoró el desarrollo de esta desde la visión de diferentes investigadores, lo cual ha permitido su inserción en dicho sector. También se comprobó que la robótica y el procesamiento digital de imágenes y señales tienen mayor incidencia en la medicina. Asimismo, se hizo un análisis de la mecatrónica aplicada a esta ciencia, el cual demostró que las áreas quirúrgica y terapéutica son las más favorecidas y se nutren de técnicas innovadoras, que resultan más fiables y menos invasivas para el paciente

A literature review was carried out to determine the impact of mechatronic in the health sector. Its development was evaluated from the point of view of different investigators, which has allowed its insertion in this sector. It was also proven that robotics and digital processing of images and signs have higher incidence in medicine. Also, an analysis of mechatronic applied to this science was carried out, which demonstrated that the surgical and therapeutical areas are the most favored and receive nourishment through innovative techniques that are more reliable and less invasive for the patient

Development of a Low-cost, Comprehensive Recording System for Circadian Rhythm Behavior

Circadian rhythm is defined as a 24-hour biological oscillation, which persists even without any external cues but also can be re-entrained by various environmental cues. One of the widely accepted circadian rhythm behavioral experiment is measuring the wheel-running activity (WRA) of rodents. However, the price for commercially available WRA recording system is not easily affordable for researchers due to high-cost implementation of sensors for wheel rotation. Here, we developed a cost-effective and comprehensive system for circadian rhythm recording by measuring the house-keeping activities (HKA). We have monitored animal's HKA as electrical signal by simply connecting animal housing cage with a standard analog/digital converter: input to the metal lid and ground to the metal grid floor. We show that acquired electrical signals are combined activities of eating, drinking and natural locomotor behaviors which are well-known indicators of circadian rhythm. Post-processing of measured electrical signals enabled us to draw actogram, which verifies HKA to be reliable circadian rhythm indicator. To provide easy access of HKA recording system for researchers, we have developed user-friendly MATLAB-based software, Circa Analysis. This software provides functions for easy extraction of scalable “touch activity” from raw data files by automating seven steps of post-processing and drawing actograms with highly intuitive user-interface and various options. With our cost-effective HKA circadian rhythm recording system, we have estimated the cost of our system to be less than $150 per channel. We anticipate our system will benefit many researchers who would like to study circadian rhythm.

Analysis of the Impacts of the Electrification of the Vehicle Fleet in the Electric Power System in Curitiba

ABSTRACT The Market share of electrical vehicles has been rising in the past few years and tends to rise even more. According to the International Energy Agency, an increase of 50% in the number of electrical vehicles is expected. Whilst that increase is beneficial from a greenhouse gases emissions drop point of view, that rise could, on the other hand, represent a major increase in the electrical power consumption. Besides, other problems such as harmonics and overloads could emerge from the massive connection of electrical vehicles to the electrical grid. Therefore, it is necessary to perform studies and simulations in order to estimate those problems and to mitigate the problems related to the inevitable expansion of the electric vehicle fleet in the near future. The present work intends to run simulations so as to identify the main effects of the electrification of the vehicular fleet in the city of Curitiba, as well as understand how the provision of ancillary services through the electrical vehicles can help in the process.

Logística reversa de resíduos de equipamentos elétricos e eletrônicos: proposta de indicadores de monitoramento para órgãos ambientais / Take-back systems for waste electrical and electronic equipment proposal of monitoring indicators for environmental agencies

A Política Nacional de Resíduos Sólidos, de 2010, representou um novo paradigma para a gestão de resíduos de equipamentos elétricos e eletrônicos, responsabilizando fabricantes, importadores, distribuidores e comerciantes pela coleta e destinação adequada desses resíduos por meio de sistemas de logística reversa. Dentro do cenário nacional, o Estado de São Paulo encontra-se em uma posição pioneira frente à implementação da logística reversa. Em âmbito internacional, destacam-se os casos japonês e europeu como referência na gestão de tais resíduos. Nesse contexto, esta dissertação tem o objetivo principal de desenvolver um conjunto de indicadores para avaliação de sistemas de logística reversa de resíduos de equipamentos elétricos e eletrônicos, com a finalidade de contribuir para o acompanhamento e avaliação de tais sistemas pelos órgãos ambientais. Foram realizadas revisão bibliográfica e pesquisa documental sobre os modelos de gestão de resíduos de equipamentos elétricos e eletrônicos e os sistemas de logística reversa na Europa, no Japão e no Brasil, e sobre indicadores e critérios para avaliação de sistemas de logística reversa desses resíduos. Em seguida, foram aplicados questionários para identificar quais indicadores são utilizados para os sistemas europeus e japoneses, quais são sugeridos por especialistas e pelas entidades gestoras nacionais. Como resultado, foi proposto um conjunto de indicadores para avaliação de sistemas de logística reversa de resíduos de equipamentos elétricos e eletrônicos, o qual foi submetido à validação de especialistas por meio da técnica Delphi. O conjunto proposto após a etapa de validação é composto por cinco parâmetros que exprimem uma caracterização básica do sistema e por 31 indicadores, classificados em seis dimensões: i) abrangência, ii) representatividade, iii) parcerias, iv) coleta, v) destinação e disposição final, e vi) custos e investimentos. Por fim, foi proposto um modelo de relatório para tais sistemas, integrado ao conjunto, para fornecer os dados necessários aos indicadores

The National Solid Waste Policy of 2010 represented a new paradigm for the management of waste electrical and electronic equipment, making manufacturers, importers, distributors and merchants accountable for the collection and proper disposal of these wastes through take-back systems. Within the national scenario, the State of São Paulo is in a pioneering position regarding the implementation of reverse logistics. At the international level, the Japanese and European cases stand out as a reference in the management of such waste. In this context, the research proposed herein has the main objective of developing a set of indicators for the evaluation of waste electrical and electronic equipment take-back systems, with the purpose of contributing to the monitoring and evaluation of such systems by environmental agencies. A bibliographic review and documentary research were carried out on models of waste electrical and electronic equipment management and take-back systems in Europe, Japan and Brazil, and on indicators and criteria for the evaluation of take-back systems of such waste. Questionnaires were then applied to identify which indicators are used for the European and Japanese systems and which are suggested by experts and national producer responsibility organizations. As a result, a set of indicators was proposed for the evaluation of waste electrical and electronic equipment take-back systems, which was submitted to the validation of specialists through the Delphi method. The set proposed after the validation step is composed of five parameters that express a basic characterization of the system and 31 indicators, classified into six dimensions: i) comprehensiveness, ii) representativeness, iii) partnerships, iv) collection, v) recycling and disposal, and vi) costs and investments. Finally, a reporting model for such systems, integrated with the set of indicators, was proposed to provide the necessary data for the indicators

Actively station: Effects on global cognition of mature adults and healthy elderly program using eletronic games / Estação ativamente: efeitos na cognição global de adultos maduros e idosos saudáveis com um programa de estimulação de jogos eletrônicos

ABSTRACT Studies show that aging is accompanied by decline in cognitive functions but also indicate that interventions, such as training on electronic games, can enhance performance and promote maintenance of cognitive abilities in healthy older adults. Objective: To investigate the effects of an electronic game program, called Actively Station, on the performance of global cognition of adults aged over 50 years. Methods: 124 mature and elderly adults enrolled in the "Actively Station" cognitive stimulation program of São Caetano do Sul City, in the State of São Paulo, participated in training for learning of electronic games. Participants were divided into two groups: training group (TG) n=102 and control group (CG) n=22. Protocol: a sociodemographic questionnaire, the Mini-Mental State Examination (MMSE), the Addenbrooke's Cognitive Examination Revised (ACE-R), the Memory Complaint Questionnaire (MAC-Q), the scale of frequency of forgetfulness, the Geriatric Depression Scale (GDS-15), the Geriatric Anxiety Inventory (GAI), the Global Satisfaction with Life Scale, and two scales on learning in the training. Results: The cognitive performance of the TG improved significantly after the program, particularly in the domains of language and memory, and there was a decrease on the anxiety index and frequency of memory complaints, when compared to the CG. Conclusion: These findings suggest that the acquisition of new knowledge and the use of new stimuli, such as electronic games, can promote improvements in cognition and mood and reduce the frequency of memory complaints.

RESUMO Estudos mostram que o envelhecimento é acompanhado por declínio nas funções cognitivas, mas também indicam que as intervenções como o treinamento de jogos eletrônicos podem melhorar o desempenho e promover a manutenção de habilidades cognitivas em idosos saudáveis. Objetivo: Investigar os efeitos de um programa de jogos eletrônicos, denominado Estação Ativamente no desempenho da cognição global de adultos com mais de 50 anos. Métodos: 124 adultos maduros e idosos inscritos no "Programa de estimulação cognitiva: Estação Ativamente" da Prefeitura Municipal de São Caetano do Sul, do estado de São Paulo. Participaram de um treinamento para aprendizagem de jogos eletrônicos. Os participantes foram divididos em dois grupos: grupo treino n=102 e grupo controle (GC) n=22. Protocolo: um questionário sociodemográfico, o Mini Exame do Estado Mental (MEEM), o Exame Cognitivo de Addenbrooke's Revisado (ACE-R), o Memory Complaint Questionnaire (MAC-Q), uma escala de freqüência de esquecimentos, a Escala de Depressão Geriátrica (GDS-15), a Escala de Ansiedade Geriátrica (GAI), a escala de satisfação geral com a vida e duas escalas sobre a aprendizagem do treinamento. Resultados: Observou-se que o desempenho cognitivo do GT melhorou significativamente após participação no programa, especificamente nos domínios de linguagem e memória, houve diminuição no índice de ansiedade e na frequência de queixas de memória, quando comparado ao GC. Conclusão: Estes achados sugerem que a aquisição de novos conhecimentos e o uso de novos estímulos como os jogos eletrônicos, podem trazer ganhos à cognição, ao humor e à diminuição da frequência de queixas de memória.

Evaluación de tecnología sanitaria: eficacia y seguridad del uso del dispositivo estimulador del nervio vago / Evaluation of health technology: efficacy and safety of the use of the vagus nerve stimulator device

INTRODUCCIÓN: Antecedentes: El presente informe está referido a la evaluación de la eficacia y seguridad del dispositivo médico Estimulador del Nervio Vago (ENV) en pacientes con el diagnóstico de Epilepsia Resistente a Fármacos, solicitado por el Hospital Edgardo Rebagliati Martins. Aspectos Generales: La Epilepsia, es un transtorno neurológico de tendencia crónica que afecta a adultos y niños; en el mundo, unos 50 millones de personas padecen de epilepsia y es la causa de defunción más común de caso neurológico a nival mundial. La Epilepsia se caracteriza por convulsiones recurrentes, que pueden ser episodios de movimientos involuntários que afectan una parte del cuerpo (convulciones parciales) o a todo el cuerpo (convulciones generalizadas) que puede acompañarse de pérdida de conciencia y de control de los esfínteres. Tecnología Sanitaria de Interés: El dispositivo Estimulador del Nervio Vago es similar a un marcapaso, el cual se conecta mediante una vía al nervio que cruza por el lado izquierdo dek cuello. Este dispositivo es colocado por debajo de la clavícula, este aparato es programado para generar estímulos eléctros repetidos, a intensidades seleccionadas y regulares, que, al estimular el nervio vago, tiene como objetivo el reducir la frencuencia de crisis epilépticas. METODOLOGÍA: Estrategia de Búsqueda: Se realizó una búsqueda sistemática de la evidencia científica con respecto a la seguridad y eficacia del dispositivo denominado Estimulador del Nervio Vago (ENV) usado en pacientes con epilepsia fármaco resistente que no son tributarios de tratamiento quirúrgico por lesión cerebral focal. Se realizó una búsqueda en las bases de datos: Pubmed, Tripdatabase, Science Direct, Embase, EBSCO; además, de la información proporcionada por grupos internacionales o agencias internacionales de que realizan revisiones sistemáticas, evaluación de tecnologías sanitarias y guías de práctica clínica, tales como The Cochrane Library, el Instituto Nacional de Salud y Excelencia en Cuidado (NICE), The National Guideline Clearinhouse (NGC), The Canadian Agency for Drugs and Technologies in Health (CADTH). Finalmente, se hizouna búsqueda en www.clinicaltrials.gov, para poder identificar ensayos aún en elaboración o que no hayan sido publicados. RESULTADOS: Lugeo de la búsqueda realizada se encontró evidencia científica que evaluaron la eficacia y seguridad del dispositivo ENV para pacientes con epilepsia fármaco resistente que no son tributarios de tratamiento quirúrgico por lesión cerebral focal. Sinopsis de la Evidenvia: Se encontró evidencia acerca de la eficacia del dispositivo Estimulador del Nervio Vago (ENV) usado en pacientes con epilepsia fármaco resistente que no son tributarios de tratamiento quirúrgico por lesión cerebral focal: -Guías de Práctica Clínica (GPC): 02 Guías de Práctica Clínica; -Revisiones Sistemáticas (RS) y Metanálisis (ME): 02 selecionadas; -Evaluaciones de Tecnología Sanitaria (ETS) y Económicas: 02 ETS; -Estudios Experimentales: Incluidos en los estudios de revisiones sistemáticas y metanálisis; -Estudios Observacionales: ninguno seleccionado; -Ensayos clínicos en proceso: ninguno. Conclusiones: Esta evaluación de tecnología santiaria llevada a cabo por el Instituto de Evaluación de Tecnologías en Salud e Investigación (IETSI) ha determinado que el uso del dispositivo Estimulador del nervio vago como tratamiento adyuvante para la Epilepsia Refractaria es eficaz para la reducción de las crisis epilépticas, ya que su efecto alcanzaría en la reducción de las crisis epilépticas, ya que su efecto alcanzaría en la reducción de hasta un 50% de las crisis epilépticas en el 50% de los pacientes tratados con el dispositivo. El dispositivo estimulador del nervio vago se muestra seguro en los pacientes con epilpsia refractaria, ya que los eventos adversos reportados no han impedido su uso en los pacientes con epilepsia refractaria. Se ha determinado que el uso del Dispositivo estimulador del nervio vago no disminuye la cantidad de medicamentos antiepilépticos en los pacientes con epilepsia refractaria. El dispositvo ENV debe utilizarse como terapia adyuante para la reducción de las crisis epilépticas. Hace falta mayores estudios que evidencien el efecto del dispositivo Estimulador del Nervio Vago en la calidad de vida de los pacientes o en la disminución de sus controles médicos o el número de hospitalizaciones. A pesar de que los resultados mostrados en la evidencia científica revisada no son alentadores, los médicos especialistas neurólogos y nerucirujanos, expresaron que el dispositivo estimulador del nervio vago representa la última alternativa que tienen este tipo de pacientes como tratamiento paliativo para disminuir la frecuencia de convulciones hasta en un 50% en un grupo de entre 30% a 50% de ellos, loo que podría traducirse en una mejora al menos modesta de su calidad de vida. El Instituto de Evaluación de Tecnologías en Salud e Investigación aprueba el uso del dispositivo estimulador del nervio vago para pacientes con epilepsia refractaria. La aprobación del uso de este dispositivo tiene una vigencia de 02 años a partir d ela fecha de publicación.

Evaluación del ambiente electromagnético en salas de rehabilitación / Evaluation of the electromagnetic environment in rehabilitation wards

Se realizó un estudio del ambiente electromagnético en 2 departamentos de electroterapia del municipio Palma Soriano de Santiago de Cuba, a fin de obtener el patrón de distribución para diferentes modos de operatividad y explotación del equipamiento médico-terapéutico. Para la caracterización electromagnética de los ambientes evaluados se elaboró un protocolo de medición a partir del análisis de normas internacionales y se empleó un medidor isotrópico que mostró los resultados a través de mapas de contorno. El equipo electromédico Magnetomed, modelo 7200 fue el que más aportó, aunque el valor máximo de la inducción magnética obtenido (19,7 µT) estuvo por debajo del límite de exposición establecido y por encima del límite de exposición sugerido por el Grupo de Trabajo Bioiniciativa. Se recomienda limitar la permanencia de personas en sus proximidades mientras está en funcionamiento.

A study of the electromagnetic environment was carried out in 2 electrotherapy departments of Palma Soriano in Santiago de Cuba, in order to obtain the distribution pattern for different operability ways and exploitation of the medical-therapeutic equipment. For the electromagnetic characterization of the evaluated environments a measurement protocol was elaborated starting from the analysis of international standards and an isotropic measure was used that showed the results through contour maps. The electro-medical device Magnetomed, model 7200 was the one that contributed the most, although the maximum value of the obtained magnetic induction (19.7 µT) was below the established exhibition limit and above the exhibition limit suggested by the Bioiniciativa Work Group. It is recommended to limit the permanency of people around, while it is in operation.

Radioterapia em paciente com neoplasia pulmonar e marcapasso ipsilateral / Radiotherapy in a patient with pulmonary neoplasia and ipsilateral pacemaker

Durante anos, o tratamento com radioterapia de portadores de dispositivos eletrônicos implantáveisfoi considerado perigoso. Se a zona a ser irradiada envolvesse o lado em que o dispositivo estivesse localizado, aestratégia envolvia inclusive mudanças no local do implante. Passaram-se os anos e tanto os dispositivos como aradioterapia evoluíram, e o que antes era regra para a segurança do binômio marcapasso-radioterapia hoje pode serexceção. Relatamos o caso de um paciente portador de neoplasia maligna de lobo superior de pulmão direito, emposição ipsilateral ao marcapasso implantado previamente...

For years treatment with radiotherapy in patients with implantable electronic devices was considered dangerous. If the area to be irradiated involved the side where the device was located, the strategy involved including changes at the implant site. The years have gone by, the devices have evolved, radiotherapy has evolved,and what used to be the safety rule for the pacemaker-radiotherapy binomial may be the exception today. We report the case of a patient with malignant neoplasia of the upper lobe of the right lung, ipsilateral to a previously implanted pacemaker...

Prevalence of musculoskeletal pain in adolescents and association with computer and videogame use / Prevalência de dor musculoesquelética em adolescentes e associação com uso de computador e jogos eletrônicos

Abstract Objective: This study investigated the presence of musculoskeletal symptoms in high school adolescents from public schools and its association with electronic device use. Methods: The sample consisted of 961 boys and girls aged 14–19 years who answered a questionnaire regarding the use of computers and electronic games, and questions about pain symptoms and physical activity. Furthermore, anthropometric assessments of all volunteers were performed. The chi-squared test and a multiple logistic regression model were used for the inferential analysis. Results: The presence of musculoskeletal pain symptoms was reported by 65.1% of the adolescents, being more prevalent in the thoracolumbar spine (46.9%), followed by pain in the upper limbs, representing 20% of complaints. The mean time of use for computers and electronic games was 1.720 and 583 minutes per week, respectively. The excessive use of electronic devices was demonstrated to be a risk factor for cervical and lumbar pain. Female gender was associated with the presence of pain in different body parts. Presence of a paid job was associated with cervical pain. Conclusion: A high prevalence of musculoskeletal pain in adolescents, as well as an increased amount of time using digital devices was observed. However, it was only possible to observe an association between the increased use of these devices and the presence of cervical and low back pain.

Resumo Objetivo: Investigar a presença de sintomas musculoesqueléticos em adolescentes estudantes do ensino médio em escolas públicas e sua associação com o uso de dispositivos eletrônicos. Método: A amostra foi composta por 961 meninos e meninas entre 14 e 19 anos que responderam questionário sobre o uso de computadores, jogos eletrônicos e questões relacionadas a sintomas dolorosos e atividade física. Além disso, todos os voluntários foram submetidos à avaliação antropométrica. Para análise inferencial foram usados os testes de qui-quadrado e modelo múltiplo de regressão logística. Resultados: A presença de sintomas de dor musculoesquelética foi reportada por 65,1% dos adolescentes, mais prevalente na coluna toracolombar (46,9%), seguida por dor nos membros superiores (20%). O tempo médio de uso de computador e jogos eletrônicos foi de 1.720 e 583 minutos por semana, respectivamente. O uso excessivo dos dispositivos eletrônicos mostrou-se como fator de risco para dor cervical e lombar. O sexo feminino apresentou associação com a presença de dor em diferentes partes do corpo. A atividade profissional esteve associada com a dor cervical. Conclusão: Observou-se alta prevalência de dor musculoesquelética nos adolescentes e elevado tempo de uso dos dispositivos eletrônicos. Entretanto, foi possível observar somente a associação do uso excessivo desses dispositivos e a presença de dor cervical e lombar.

El conteo automático de reticulocitos: una herramienta de uso diagnóstico, clínico e investigativo / Automated reticulocyte count: a tool for diagnostic, clinical and research use

Se revisan los antecedentes históricos del conteo de reticulocitos como determinación indispensable en el laboratorio de hematología para la evaluación de la actividad eritropoyética durante la clasificación, diagnóstico y monitoreo de la respuesta terapéutica en distintos trastornos y situaciones clínicas, principalmente en casos de anemias. Se describe el tránsito del tradicional método de conteo de reticulocitos manual al método automatizado y la integración de los parámetros reticulocitarios al hemograma automatizado actual; además, se analizan las desventajas del método de recuento manual y las ventajas del método automatizado, así como los principios de detección en que se basa el conteo electrónico de reticulocitos. Con relación a los parámetros reticulocitarios, se describe su medición, cálculo y unidades de medida; también se resalta la importancia de la fracción de reticulocitos inmaduros y del contenido de hemoglobina reticulocitaria como variables de mayor uso clínico e investigativo en la evaluación de la respuesta medular ante diversos trastornos clínicos y protocolos terapéuticos. Por último, se alude a la necesidad del conocimiento y empleo de las variables reticulocitarias en la práctica clínica de rutina por parte de los clínicos y especialistas en hematología.

The historical background of reticulocyte count is reviewed as an essential determination in the laboratory of hematology for the evaluation of erythropoietic activity during classification, diagnosis and monitoring of therapeutic response of different conditions and clinical situations are also reviewed, especially in anemia The transition from traditional manual reticulocyte counting method to automated method and integration of the reticulocyte parameters to current automated complete blood count are described. The disadvantages of manual method and the advantages of automated methods are cited, as well as detection principles in which electronic reticulocyte count is based. Regarding reticulocyte parameters, measurement, calculation and units are described. The importance of immature reticulocyte fraction and reticulocyte hemoglobin content as variables most clinical and research use in evaluating bone marrow response to various clinical disorders and therapeutic protocols are highlighted. Finally, the need for knowledge and use of reticulocyte variables in routine clinical practice by clinicians and hematologist is referred.

Comparison of two different methods of average working length determination in second molars and premolars / Comparación de dos métodos para determinar la longitud de trabajo promedio en segundos molares y premolares

Within the procedures involved in a successful endodontic treatment is the working length (WL) determination. The root canal end must be detected accurately, and a precise control of the WL must be maintained. There are several methods to determine WL. Researchers have published the average teeth length (ATL) to the human permanent dentition. These measurements are used as an anatomical reference. If the WL is evaluated using a radiographic image, it is accepted as clinical success if the limit of the canal sealing is 1 mm coronal to the root apex. One method to determine WL is based in substract 1 mm to ATL. Another method widely used, assert to achieve a more precise WL determination, through the use of an electronic apex locator (AL). Nevertheless, published measures of ATL are still used as anatomical reference, and are used to determine WL in the absence of an AL. The aim of this study was to determine the average WL of second molars and premolars with endodontic treatment indication using a PropexII® AL, and compare these measurements to WL determination using ATL method. A descriptive cross-sectional study with a non-random sample of consecutive cases was executed. Results showed that there were no statistically significant differences between the WL obtained with AL and ATL method in studied teeth, except mesio-buccal canal of second maxillary molars (19.94 mm average using AL, 1.54 mm greater than ATL method 18.40 mm; p= 0.002). The ATL method to determine WL could be used to determine the WL of second molars and premolars in studied population. Further research should be performed to determine if ATL method is safe and reliable to be used in absence of an AL or in patients where this instrument cannot be used.

Entre los procedimientos involucrados en un tratamiento endodóntico exitoso está la determinación de longitud de trabajo (LT). Esta debe mantenerse durante todo el tratamiento, y el extremo del canal radicular (CR) debe detectarse con precisión. Existen varios métodos para determinar LT; los investigadores han publicado la longitud total promedio (LTP) de la dentición permanente humana. Estas mediciones se utilizan como referencia anatómica. Si LT se evalúa usando una imagen radiográfica, se acepta como éxito clínico cuando el límite de la obturación radicular queda 1 mm coronal al ápice radicular. Un método para determinar LT se basa en restar 1 mm a la LTP. Otro método, que permite una determinación de LT más precisa, se realiza utilizando un localizador apical electrónico (LA). Pese a esto último, las medidas publicadas de LTP todavía se utilizan como referencia anatómica, para determinar LT en ausencia de un LA. El objetivo fue determinar LT promedio de los CR de segundos molares y premolares con indicación de endodoncia utilizando LA PropexII®, y comparar estas mediciones con la LT determinada utilizando el método de LTP. Se realizó un estudio descriptivo de corte transversal con una muestra no probabilística de casos consecutivos. No hubo diferencias estadísticamente significativas entre la LT obtenida con LA y el método LTP en los dientes estudiados, salvo en los canales mesio-bucales de segundos molares superiores (19,94mm promedio usando LA, 1,54 mm mayor que el método LTP: 18,40 mm; p= 0,002). El método para definir LT a través de LTP podría utilizarse para determinar LT de segundos molares y premolares en la población estudiada. Se requieren investigaciones posteriores para determinar si el método que utiliza LTP es confiable para ser utilizado en ausencia de un LA o en pacientes en los que este instrumento no pueda ocuparse.

Influencia del campo magnético sobre el crecimiento de microorganismos patógenos ambientales aislados en el Archivo Nacional de la República de Cuba / Influence of magnetic field on the growth of pathogen microorganisms isolated from the indoor environment at the Archivo Nacional de la República de Cuba

Introducción. En el Archivo Nacional de la República de Cuba, existe contaminación electromagnética y la influencia del campo magnético oscilante de frecuencia extremadamente baja podría cuantificarse con microorganismos patógenos aislados de su ambiente interior. Objetivo. Cuantificar la influencia de este tipo de campo magnético sobre el crecimiento de microorganismos patógenos aislados del ambiente en el Archivo Nacional de la República de Cuba. Materiales y métodos. Se emplearon cinco microorganismos: Streptococcus sp. (1), Listeria sp. (2) y Candida guillermondii (3), aislados en el Archivo, así como Escherichia coli ATCC 25922 (4) y Saccharomyces cerevisiae (5), como referencia. Se les aplicó un campo magnético oscilante de frecuencia extremadamente baja de 60 Hz/220 V de 3 mT durante dos horas, en tres tubos de cultivo con agua destilada y con caldo nutriente. Después se inocularon 0,1 ml en placas de Petri con los medios de cultivo agar CromoCen SC (1 y 2), agar de dextrosa y papa (3), agar CromoCen CC 4227 (4) y agar con extracto de malta (5). Las colonias se contaron (log UFC/ml) mediante el procesamiento digital de las imágenes de las placas de Petri empleando el programa MatLab ® . Resultados. Se observó una estimulación significativa (p=0,05) de la cantidad de colonias tratadas con respecto a los controles, siendo mayor en el caldo nutriente que en el agua destilada y más en las bacterias (caldo nutriente-colonias tratadas: 9,43 a 10,62 UFC/ml) que en las levaduras (caldo nutriente-colonias tratadas: 8,31 a 8,79 UFC/ml). La estimulación se produjo en orden decreciente así: Listeria sp., E. coli ATCC 25922, Streptococcus sp., C. guillermondii y S. cerevisiae . Conclusión. Se concluyó que el campo magnético aplicado tuvo un efecto estimulante sobre los microorganismos estudiados, lo cual potencia el riesgo para la salud del personal y los visitantes del Archivo Nacional de la República de Cuba.

Introduction: Electromagnetic pollution has been detected at the Archivo Nacional de la República de Cuba and the influence of extremely low frequency magnetic fields could be quantified with pathogenic microorganisms isolated from the indoor environment. Objective: To quantify the influence of an extremely low frequency magnetic field on the growth of pathogenic microorganisms isolated from the environment at the Archivo Nacional. Materials and methods: We used five microorganisms isolated at the Archivo Nacional: Streptococcus sp. (1), Listeria sp. (2) and Candida guillermondii (3), and Escherichia coli ATCC 25922 (4) and Saccharomyces cerevisiae (5) as references. We applied this magnetic field of extremely low frequency, 60 Hz/220 V (3 mT), for two hours to these microorganisms on three culture tubes with distilled water and nutrient broth. Then we inoculated 0.1 mL in the following solid culture mediums on Petri dishes: CromoCen SC Agar (1 and 2), Potato Dextrose Agar (3), CromoCen DC 4227 (4) and Malt Extract Agar (5). The colonies were counted (log CFU/mL) by digital processing of the images of Petri dishes using the MatLab ® tool. Results: We observed a statistically significant stimulation (p=0.05) in the quantity of treated colonies as compared to controls, which was higher in nutrient broth than in distilled water, and in bacteria (nutrient broth and treated colonies: 9.43 to 10.62 CFU/mL) as compared with yeasts (nutrient broth-treated colonies: 8.31 to 8.79 CFU/mL). In decreasing order, stimulation was as follows: Listeria sp., E. coli ATCC 25922, Streptococcus sp., C. guillermondii and S. cerevisiae . Conclusion: We concluded that the magnetic field applied had a stimulating effect on the microorganisms under study, which increases the risk to the health of staff and visitors at the Archivo Nacional .

Effectiveness of three electronic apex locators to determine root canal working length / Efectividad de tres localizadores apicales electrónicos para determinar la longitud radicular de trabajo

This study was to evaluate in vivo the accuracy of three electronic apex locators (EALs) in determining working length (WL) using hand files and a wear technique. Thirty two premolars that were completely formed apically and that were scheduled for extraction for orthodontic reasons from patients between ages of 15 and 20 years old were included. Electronic measurement of WL was performed using the EAL according to the manufacturer’s instructions. The following three EAL were used: A. Root ZX II; B. Raypex 5, and C. Propex II. There were significant difference (p=0.0002) when comparing median differences among the three EAL. Statistical analysis revealed significant differences between Root ZX II vs. Raypex 5 and Root ZX II vs. Propex II (p=0.0044; p=0.0002), while between aypex 5 and Propex II, there were no statistically significant differences with respect to the accuracy of the EAL in determining WL (p=0.1087). The present findings suggest that Root ZX II presented the highest agreement rate for determining the final WL...

Estudio fue evaluar in vivo la exactitud de tres localizadores apicales electrónicos(LAEs) para determinar la longitud de trabajo (LT) usando instrumentos manuales y una técnica de desgaste. Treinta y dos premolares con formación apical completa e indicados para extracción por razones ortodóncicas de pacientes de edad entre 15 y 20 años fueron incluidos en el estudio. Seusaron tres LAE; A. Root ZX II; B. Raypex 5, y C. Propex II. Se encontraron diferencias significativas (p=0.0002) cuando se compararon las medianas entre los tres LAE. El análisismostró diferencias entre Root ZX II vs. Raypex 5 y Root ZX II vs. Propex II (p=0.0044; p=0,0002), mientras queentre Raypex 5 y Propex II, no se encontraron diferencias estadísticamente significativas en la determinación de la LT (p=0.1087). Los presentes hallazgos sugieren que Root ZX II mostró la mayor exactitud para determinar la LT final...

Interpretation of YY/T 0841-2011 Medical electrical equipment--recurrent test and test after repair of medical electrical equipment standard / 中国医疗器械杂志

The paper introduces the background of YY/T 0841 standard, and interprets the main content of this standard. It is helpful to understand and applicate the standard.

Reference the YY/T 0841-2011 standard to improve preventive maintenance of medical electrical equipment and experience / 中国医疗器械杂志

In this paper, we interpret the new YY/T 0841-2011 standard and contrast the difference between it and GB9706.1-2007 standard. Then, we improved the current preventive maintenance work. After the improvement, we not only have more effective detection of the electrical safety performance of all kinds of medical electrical equipment, but also reduce the workload of clinical engineers, improve efficiency, and reduce the risk of electrical shock.

Processo de implantação dos sistemas de logística reversa de equipamentos eletroeletrônicos previstos na Política Nacional de Resíduos Sólidos: uma visão dos gestores / Reverse Logistics of Electrical and Electronic Equipment of the National Solid Waste Policy Deployment Process perceptions of managers

A viabilização da coleta e destinação correta dos resíduos pós-consumo é prevista pela Política Nacional de Resíduos Sólidos (PNRS) - Lei n°12.305 de 2010-importante marco regulatório para a gestão ambiental no Brasil. Dentre diversos aspectos enunciados, destacam-se o princípio da responsabilidade compartilhada pelo ciclo de vida dos produtos e o instrumento logística reversa. O art. 33 desta lei considera prioritária a implantação de sistemas de logística reversa (SLR) para seis classes de resíduos, dentre eles os resíduos de equipamentos eletroeletrônicos (REEE). Objetivos: analisar e caracterizar o discurso de gestores do comércio, da indústria, do poder público e das cooperativas, relacionados com o setor de eletroeletrônicos sobre a implantação de SLR. Métodos: Foram realizadas entrevistas semiestruturadas com nove gestores envolvidos no processo de implantação de SLR de eletroeletrônicos. Os dados foram transcritos, categorizados e posteriormente analisados pelo software Classification Hiérarchique Classificatoire et Cohésitive - CHIC®. O modelo dos múltiplos fluxos foi utilizado para auxiliar no entendimento do processo de formação da PNRS. Resultados: foram obtidas sete árvores hierárquicas de similaridade e quatro grupos com diferentes forças de implicação. Conclusão: Os pontos relevantes identificados mostram que: 1) o Acordo Setorial foi o instrumento escolhido para implantação de SLR de REEE, mas existem entraves entre os setores privado e público...

The feasibility of collection and proper disposal of post-consumer waste is provided by the National Solid Waste Policy (PNRS) - Law n° 12.305 2010-important regulatory framework for environmental management in Brazil. Among several aspects listed, highlight the principle of shared responsibility for the lifecycle of products and reverse logistics tool. The art. 33 of this law considers a priority the implementation of reverse logistics systems (SLR) for six classes of waste, including waste electrical and electronic equipment (WEEE). Objectives: To analyze and characterize the speech of managers of trade, industry, public authorities and cooperatives, related to consumer electronics over the implementation of SLR. Methods: Semi-structured interviews were conducted with nine managers involved in the implementation of electronic SLR process. Data were transcribed, categorized and analyzed using the software Classification Hierarchique Classificatoire et Cohésitive - CHIC®. The model of "multiple streams" was used to assist in understanding the process of formation of PNRS. Results: seven hierarchical trees of similarity and four groups with different forces of implication were obtained. Conclusion: The relevant points identified show that: 1) the 'Sectoral Agreement' was the instrument chosen for the implementation of the WEEEs SLR, but there are barriers between the private and public sectors, generating delays in signing the agreement...