Luz UVC como estratégia de desinfecção do ar e superfícies hospitalares / Luz UV-C como estrategia de desinfección del aire y superficies hospitalarias / UVC light as a strategy for disinfection of hospital air and surfaces

Resumo Objetivo Avaliar a eficácia antimicrobiana de um dispositivo fixo emissor de luz UV-C na desinfecção de diferentes superfícies do ambiente hospitalar e sua eficácia antifúngica na qualidade do ar. Métodos Estudo quase-experimental realizado em uma unidade de internação hospitalar, que utilizou o Bioamostrador de ar Andersen® de seis estágios para análise do ar; e na avaliação das superfícies, utilizaram-se três suspensões de microrganismos (Acinetobacter sp. MDR, Escherichia coli e Klebsiella pneumoniae produtora de KPC) para contaminar o ambiente. Para ambos foram feitas coletas pré (controle) e pós-acionamento da luz UV-C (teste). Resultados Na avaliação do ar houve uma redução importante da contagem de colônias após a luz UV-C e não foram encontrados fungos patogênicos ou toxigênicos em nenhum dos dois momentos. Em relação à desinfecção das superfícies, nenhum crescimento bacteriano foi observado após a intervenção da luz, demonstrando 100% de inativação bacteriana nas condições testadas. Conclusão A utilização da tecnologia com emissão de luz UV-C fixa foi eficaz e pode ser considerada uma intervenção promissora para protocolos de desinfecção de superfícies hospitalares.

Resumen Objetivo Evaluar la eficacia antimicrobiana de un dispositivo fijo emisor de luz UV-C para la desinfección de diferentes superficies del ambiente hospitalario y su eficacia antifúngica en la calidad del aire. Métodos Estudio cuasi experimental realizado en una unidad de internación hospitalaria, en que se utilizó el biomuestreador de aire Andersen® de seis etapas para el análisis del aire. En el análisis de las superficies, se utilizaron tres suspensiones de microorganismos (Acinetobacter sp. MDR, Escherichia coli y Klebsiella pneumoniae productora de KPC) para contaminar el ambiente. En ambos se tomó una muestra antes (control) y después de accionar la luz UV-C (prueba). Resultados En el análisis del aire hubo una reducción importante del recuento de colonias después de la luz UV-C y no se encontraron hongos patógenos ni toxigénicos en ninguno de los dos momentos. Con relación a la desinfección de las superficies, no se observó ningún crecimiento bacteriano después de la intervención de la luz, lo que demuestra un 100 % de inactivación bacteriana en las condiciones analizadas. Conclusión El uso de la tecnología con emisión de luz UV-C fija fue eficaz y puede ser considerada una intervención prometedora para protocolos de desinfección de superficies hospitalarias.

Abstract Objective To evaluate a fixed UV-C light emitting device for its antimicrobial effectiveness in the disinfection of distinct surfaces and its antifungal effectiveness on air quality in the hospital environment. Methods This quasi-experimental study was conducted in a hospital inpatient unit, in which a six-stage air Biosampler (Andersen®) was used for air analysis. In the evaluation of surfaces, three suspensions of microorganisms (Acinetobacter sp. multidrug-resistant, Escherichia coli, and KPC-producing Klebsiella pneumoniae) were used to contaminate the environment. In both evaluations, pre- (control) and post-activation of UV-C light (test) collections were made. Results In the air evaluation, an important reduction was observed in the colony count after irradiation with UV-C light, and pathogenic or toxigenic fungi were not found in either of the two moments. Regarding the disinfection of surfaces, no bacterial growth was observed after the application of UV-C light, showing 100% bacterial inactivation under the tested conditions. Conclusion The use of fixed UV-C light emission technology was effective and can be considered a promising intervention for hospital surface disinfection protocols.

Neuroblastoma olfatorio / Olfactory neuroblastoma

El neuroblastoma olfativo, también conocido como estesioneuroblastoma, es un tumor derivado de la capa basal del epitelio olfativo. Se presenta como una masa de tejido blando en la porción superior de la cavidad nasal que involucra las células de aire etmoides anteriores y medias en un lado y se extiende a través de la placa cribiforme en la fosa craneal anterior, es poco frecuente y representa menos del 3 % de las neoplasias intranasales. De acuerdo con la evolución epidemiológica, su distribución por edades es bimodal con un pico en pacientes adultos en la segunda década de la vida y otro en los quinta y sexta, sin existir predilección por género reconocida

Olfactory neuroblastoma, also known as esthesioneuroblastoma, is a tumor derived from the basal layer of the olfactory epithelium. It presents as a soft tissue mass in the upper portion of the nasal cavity that involves the anterior and middle ethmoid air cells on one side and extends through the cribriform plate in the anterior cranial fossa, it is rare and represents less 3% of intranasal neoplasms. According to the epidemiological evolution, its age distribution is bimodal with a peak in adult patients in the second decade of life and another in the fifth and sixth, with no recognized gender predilection

Identificação e perfil de sensibilidade de aspergillus spp. presente no ar atmosférico / Identification and sensitivity profile of aspergillus spp. present in atmospheric air

Aspergillus spp. são fungos saprófitos distribuídos mundialmente, sendo agentes de aspergilose, micose causada por via aérea. Em meio ambiente agrícola, fungos podem estar expostos a compostos azólicos usados como agrotóxicos e sofrerem pressão seletiva para surgimento de cepas resistentes. Se inaladas, principalmente, por indivíduos imunosuprimidos, tais cepas podem desencadear infecção refratária a tratamentos com fármacos da mesma classe química, como itraconazol e voriconazol. A busca da resistência ambiental contribui para o desvendamento da epidemiologia molecular da aspergilose. O objetivo deste estudo foi identificar as espécies de Aspergillus e determinar os respectivos perfis de sensibilidade a azóis, fármacos e fungicidas agrícolas, de amostras de regiões de cinco estados do Brasil. Foram estudados 128 isolados de Aspergillus spp., provenientes de 114 amostras de ar atmosférico. Os isolados foram classificados em seções e sequenciados para identificação da espécie. As seções mais frequentes foram: Nigri (50,8%), Flavi (29,7%), Circumdati (9,3%), além de Fumigati, Clavati, Terrei, Restricti e Nidulantes. Valores altos de concentração inibitória mínima (MIC), situados acima dos pontos de corte epidemiológicos (ECOFF) que caracterizam isolados não-selvagens para itraconazol e posaconazol, foram observados para um isolado da seção Nigri, identificado como Aspergillus welwitschiae. Para seção Restricti (n=2), apesar de não haver ECOFF, os valores de MIC foram mais elevados para posaconazol, voriconazol, itraconazol, anfotericina B e para o fungicida agrícola difenoconazol, quando comparados às demais seções. Para isolados das seções Flavi, Circumdati e Clavati, foram encontrados valores altos de MIC dos agrotóxicos tebuconazol e metconazol. Não foi constatada ocorrência de resistência cruzada a mais de...(AU)

Aspergillus spp. are saprophytic fungi distributed worldwide, being agents of aspergillosis, a mycosis caused by the airborne route. In an agricultural environment, fungi may be exposed to azole compounds used as pesticides and undergo selective pressure for the emergence of resistant strains. If inhaled, mainly by immunosuppressed individuals, these strains can trigger an infection that is refractory to treatments with drugs of the same chemical class, such as itraconazole and voriconazole. The search for environmental resistance contributes to the unveiling of the molecular epidemiology of aspergillosis. The aim of this study was to identify Aspergillus species and determine the respective profiles of sensitivity to azoles, pharmaceuticals and agricultural fungicides, from samples isolated from regions of five states of Brazil A total of 128 Aspergillus spp. isolates from 114 atmospheric air samples were studied. The isolates were classified into sections and sequenced to identify the species. The most frequent sections were Nigri (50.8%), Flavi (29.7%), Circumdati (9.3%), in addition to Fumigati, Clavati, Terrei, Restricti and Nidulantes. High values of minimum inhibitory concentration (MIC) above the epidemiological cut-off points (ECOFF), characterizing non-wild isolates, for itraconazole and posaconazole, were observed for an isolate from the Nigri section, identified as Aspergillus welwitschiae. For the Restricti section (n=2), despite the absence of ECOFF, the MIC were higher for posaconazole, voriconazole, itraconazole, amphotericin B and for agricultural fungicide difenoconazole, when compared to the other sections. For isolates from Flavi, Circumdati, and Clavati sections, high MIC values of the pesticides tebuconazole and metconazole were found. Cross-resistance to more than one azole drug was not found. It is concluded that in the atmospheric air of the cities of Itu, São Paulo, Azenha, and Porto Alegre there are non-wild isolates with the possibility of presenting resistance mechanisms. Complementary studies to this one, using gene sequencing methods, are necessary to elucidate the underlying possible resistance mechanism of mutation. This is the first study in Brazil to demonstrate non-wild isolates from urban atmospheric air, harboring possible mechanisms of environmental resistance. (AU)

Exérese de pterígio em paciente pós-LASIK com técnica de air bubble / Pterygium surgery with air bubble technique in a post-LASIK patient

RESUMO O pterígio é uma das doenças que mais acomete a superfície ocular, principalmente em regiões próximas ao Equador. Ocorre principalmente em adultos jovens, podendo ocasionar sintomas, danos estéticos e ópticos. Relata-se um caso de exérese de pterígio classificado pela extensão corneana em grau II e, pela vascularização, em grau 2 de Tan, com cirurgia prévia de LASIK, a partir de uma nova técnica, a técnica de Moscovici, a qual fundamenta-se na dissecção com bolha de ar, com a finalidade de separar o epitélio conjuntival do estroma profundo e da Tenon, com maior facilidade e rapidez e para obter enxertos finos.

ABSTRACT Pterygium is one of the diseases that most affect the ocular surface, especially in regions close to the equator. It mainly affects young adults and can cause symptoms, as well as aesthetic and optical impairment. We report a case of pterygium excision classified by grade II corneal extension and Tan grade 2 vascularization with previous laser in situ keratomileusis (LASIK) surgery, using a new technique, the Moscovici technique, which is based on dissection with an air bubble to separate easier and faster the conjunctival epithelium from the deep stroma and the Tenon, obtaining thinner grafts.

Determinantes de la salud ambiental en el Perú: curva de Kuznets 1990-2015 / Determinants of environmental health in Peru: Kuznets curve 1990-2015

El ambiente es el lugar donde vive, trabaja y se desarrolla el hombre, compuesto básicamente por dos sistemas interrelacionados e independientes: por una parte, es el hombre conviviendo en una sociedad con características muy diferentes, y por el otro lado, los elementos de la naturaleza siendo transformados por los hombres donde viven inmersos. En ese sentido, la degradación y contaminación ambiental, tienen efectos notables en la vidad de los seres humanos, siendo responsable de la muerte de cientos de millones de personas que sufren de enfermedades respiratorias asociadas con la contaminación externa e interior del aire. En ese sentido, ya a partir de las últimas décadas, las emisiones de dióxido de carbono han alcanzado cifras record superando las 10 gigatoneladas. Este incremento está asociado al sector energético (47%), la industria (30%) y el transporte (11%) principalmente, lo que ha logrado un calentamiento global progresivo de la superficie terrestre con las consecuencias típicas asociadas al derretimiento de los glaciares, cambios en los ciclos hidrológicos, falta de alimentos, aumento de los fenómenos meteorológicos, migraciones descontroladas, enfermedades y pandemias. De este modo, surge la economía ambiental, una disciplina que intenta dar repuestas integrales entre ambos tópicos, medio ambiente y economía, donde diversas teorías tratan de explicar los fenómenos observados. El concepto de las Curvas de Kuznets Ambientales (CKA), señala una relación dinámica entre el PIB y la calidad del medio ambiente. El objetivo del artículo ha sido determinar si en el Perú, durante el periodo 1990-2015, ha habido una relación en forma de U invertida entre la producción interna y la contaminación del aire. La investigación prueba que, en el Perú, durante el periodo 1990-2015, no ha habido una relación en forma de U invertida entre la producción interna y la contaminación del aire, sino que la producción interna ha tenido un impacto positivo y lineal sobre el dióxido de carbono y el óxido de nitrógeno(AU)

The environment is the place where man lives, works and develops, basically composed of two interrelated and independent systems: on the one hand, it is man living together in a society with very different characteristics, and on the other hand, the elements of the nature being transformed by men where they live immersed. In this sense, environmental degradation and pollution have notable effects on the lives of human beings, being responsible for the death of hundreds of millions of people who suffer from respiratory diseases associated with external and internal air pollution. In this sense, already in recent decades, carbon dioxide emissions have reached record figures, exceeding 10 gigatons. This increase is mainly associated with the energy sector (47%), industry (30%) and transport (11%), which has achieved a progressive global warming of the earth's surface with the typical consequences associated with the melting of glaciers, changes in hydrological cycles, lack of food, increased weather events, uncontrolled migrations, diseases and pandemics. In this way, environmental economics arises, a discipline that tries to provide comprehensive answers between both topics, environment and economy, where various theories try to explain the observed phenomena. The concept of the Environmental Kuznets Curves (EKC), indicates a dynamic relationship between GDP and the quality of the environment. The objective of the article has been to determine if in Peru, during the period 1990-2015, there has been an inverted U-shaped relationship between internal production and air pollution. The research proves that, in Peru, during the period 1990-2015, there has not been an inverted U-shaped relationship between domestic production and air pollution, but rather that domestic production has had a positive and linear impact on air pollution. carbon dioxide and nitrogen oxide(AU)

Síntomas respiratorios en agentes civiles de tránsito expuestos a smog en Quito en el año 2021 / Respiratory symptoms in civil traffic police agents exposed to smog in Quito in 2021

INTRODUCCIÓN. Existe relación entre la exposición de contaminantes en el aire y problemas respiratorios que van desde síntomas leves en vías respiratorias altas hasta enfermedades que pueden comprometer la vida de los pacientes como: neumonía, enfermedad pulmonar obstructiva crónica y cáncer pulmonar. OBJETIVO. Registrar los síntomas respiratorios presentados por agentes civiles de tránsito expuestos a smog. MATERIALES Y MÉTODOS. Estudio analítico transversal. Población de 3 458 y muestra de 454 participantes entre agentes civiles de tránsito, fiscalizadores de tránsito y personal administrativo de la Agencia Metropolitana de Tránsito en el año 2021, seleccionados por muestreo aleatorio simple estratificado para los dos grupos de participantes; se aplicó un sondeo digital basado en las encuestas: European Community Respiratory Health Survey y condiciones de trabajo. Para el análisis de datos se utilizó la herramienta EPI INFO, donde se realizó pruebas estadísticas bivariadas de Chi2 y análisis multivariado como regresiones logísticas crudas y ajustadas. RESULTADOS. Se observó que la población de trabajadores operativos en vía tuvo alrededor de dos veces más riesgo de desarrollar sibilancias en comparación a la población administrativa OR=2,1 (IC 95% 1,01­4,39); el personal operativo tuvo más del doble de riesgo de desarrollar bronquitis crónica versus la población administrativa OR=2,5 (IC 95% 1,14­5,73). Los resultados fueron ajustados mediante regresión logística con variables de condiciones de trabajo y salud (p=<0,05). CONCLUSIÓN. Se registró una relación significativa entre la contaminación ambiental por smog y enfermedades respiratorias a largo plazo.

INTRODUCTION. There is a relationship between exposure to air pollutants and respiratory problems ranging from mild upper respiratory symptoms to life-threatening diseases such as pneumonia, chronic obstructive pulmonary disease and lung cancer is evident. OBJECTIVE. To record the respiratory symptoms presented by civilian traffic officers exposed to smog. MATERIALS AND METHODS. Cross-sectional analytical study. Population of 3 458 and sample of 454 participants among civilian traffic agents, traffic inspectors and administrative personnel of the Metropolitan Traffic Agency in the year 2021, selected by simple stratified random sampling for the two groups of participants; a digital survey was applied based on the European Community Respiratory Health Survey and working conditions. For data analysis, the EPI INFO tool was used, where bivariate Chi2 statistical tests and multivariate analysis such as crude and adjusted logistic regressions were performed. RESULTS. It was observed that the population of operational track workers had about twice the risk of developing wheezing compared to the administrative population OR=2,1 (95% CI 1,01-4,39); operational personnel had more than twice the risk of developing chronic bronchitis versus the administrative population OR=2,5 (95% CI 1,14­5,73). Results were adjusted by logist regression with working conditions and health variables (p=<0,05). CONCLUSION. There was a significant relationship between smog pollution and long-term respiratory diseases.

Evaluación del dolor y la distensión abdominal según el agente insuflante (CO 2 frente al aire) en una unidad de endoscopia digestiva avanzada de Manizales, Colombia / Comparison of abdominal pain and distention due to insufflation with CO 2 versus insufflation with air in an advanced digestive endoscopy unit in Manizales, Colombia

Resumen Objetivo: comparar la magnitud del dolor y el perímetro abdominal; la incidencia del dolor y la distensión abdominal, y las complicaciones según el agente insuflante utilizado. Pacientes y método: estudio prospectivo analítico de cohorte. Se recolectaron datos de 43 colangiopancreatografías retrógradas endoscópicas (CPRE) y 20 colonoscopias insufladas con dióxido de carbono (CO2); para cada una se buscó un examen control con aire ambiente. En total, se sumaron 86 CPRE y 40 colonoscopias. Además, se realizó una caracterización clínica, un análisis bivariado y multivariado. Resultados: el procedimiento más doloroso fue la colonoscopia; sin embargo, el 60 % de los pacientes de colonoscopia, y el 70 % de aquellos de CPRE, no presentaron dolor 15 minutos después de haber despertado luego del examen. Asimismo, no se hallaron diferencias estadísticamente significativas según la indicación del examen, la presencia o intensidad de dolor al momento del procedimiento, la edad, el sexo o el diagnóstico. El riesgo relativo (RR) de dolor inmediato fue 4,8 veces superior, cuando la insuflación se realizó con aire en vez de CO2 (RR = 4,8; intervalo de confianza [IC], 95 %: 2,3 a 9,2; p <0,001). Entre tanto, el riesgo de distensión abdominal en el grupo con aire fue 2,6 veces superior, en comparación con el grupo insuflado con CO2 (RR = 2,6; IC, 95 %: 1,8 a 3,9; p <0,001). El CO2 redujo la probabilidad y la magnitud de la distensión abdominal y de los dolores inmediatos, posteriores a la colonoscopia o a la CPRE. No hubo complicaciones en ninguno de los 126 pacientes. Conclusiones: el dolor y la distensión abdominal se presentan con menor frecuencia e intensidad cuando se usa CO2 como agente insuflante. Ninguno de los procedimientos presentó complicaciones mayores.

Abstract Objective: This study compares the incidence of abdominal pain and distension, the magnitude of pain, abdominal perimeter, and related complications related to two different insufflating agents. Patients and Method: Prospective analytical cohort study. Data were collected from 43 performances of endoscopic retrograde cholangiopancreatography (ERCPs) and 20 colonoscopies in which patients were insufflated with CO2. A control examination using ambient air for insufflation was performed for each patient. In total, 86 ERCPs and 40 colonoscopies were performed. The study includes clinical characterizations, bivariate analysis and multivariate analysis. Results: The most painful procedure was colonoscopy, but 60% of colonoscopy patients and 70% of ERCP patients had no pain 15 minutes after waking up following their examinations. No statistically significant differences related to reasons for examination, presence or intensity of pain at the time of the procedure, age, sex or diagnosis were found. The relative risk (RR) of immediate pain is 4.8 times higher when insufflation is done with air instead of CO2 (RR = 4.8; 95% CI: 2.3 to 9.2; p <0.001). The risk of abdominal distension in the air group was 2.6 times higher than that of the group insufflated with CO2 (RR = 2.6; 95% CI: 1.8 to 3.9; p <0.001). CO2 reduces the likelihood and extent of abdominal distension and immediate post colonoscopy or ERCP pain. There were no complications in any of the 126 patients. Conclusions: Abdominal pain and bloating occur less frequently and less intensely when CO2 is used as an insufflating agent. None of the procedures presented major complications.

Effect of drying methods on the powder and compaction properties of microcrystalline cellulose derived from Gossypium herbaceum

The effect of drying method, a process variable, on the powder and compaction properties of microcrystalline cellulose (MCC) obtained from the partial acid hydrolysis of bleached alpha (α) cellulose content of matured linters of Gossypium herbaceum (GH) was investigated. A portion of the wet MCC obtained was fluid bed dried at 60 ± 1 ºC, inlet air of 30 m3 min-1 for 3 h (coded MCC-GossF). The second portion was lyophilized at - 45 ± 2 ºC for 6 h (coded MCC-GossL). The physicochemical, scanning electron micrographs, X ray diffraction patterns and micromeritic properties of the derived MCCs were determined using standard methods. The cohesiveness and compactibility of the powders were investigated using Kawakita model while the deformation and compressibility pattern were determined using Heckel model. Avicel® PH 102 (AV-102) was used as comparing standard. Ash values of < 2%, pH (6.54 ± 0.23 to 6.58 ± 0.08), degree of polymerization, DP (231.50) was obtained. MCC-GossF had higher moisture content, swellability, better flow indices, and lesser porosity than MCC-GossL. Kawakita model demonstrated good consolidation and compactibility for both powders. Compacts of MCC-GossL were significantly (p < 0.05) harder than those of MCC-GossF. Heckel analysis demonstrated good compressibility and deformation pattern that was comparable with AV-102. Compacts of MCC-GossL had better mechanical and tablet compression properties than MCC-GossF

Comparison of bioelectrical impedance analysis and air displacement plethysmography / Comparación de análisis de impedancia bioeléctrica y pletismografía de desplazamiento de aire

The measurement of body composition has become an important component in the diagnosis of health, physical conditioning and nutritional status. The aim of this study was to compare two methods of detecting body composition, bioelectrical impedance and air displacement plethysmography for athletes and non-athletes. Specifically, we compared the parameters as fat mass, fat free mass and the value of basal metabolic rate. A sample size of 52 men (age 26.2 ± 5.4 years) that included a group of mixed martial arts (MMA) fighters (n = 31, age 27.2 ± 5.5 years) and a group of the non-athletes (n =21, age 24.6 ± 5.1 years). Both groups were measured by bioelectrical impedance and air displacement plethysmography. Significant differences in % body fat (p<0.05) and fat-free mass (p<0.05) were noted between bioelectrical impedance and air displacement plethysmography of non-athletes, but there were no significant differences for athletes. Furthermore, there was a significant difference (p<0.001) of basal metabolic rate between bioelectrical impedance and air displacement plethysmography, but the correlation with fat free mass was very strong for both methods. Therefore, the use of bioelectrical impedance and air displacement plethysmography may be useful for detecting changes in body composition, but their accuracy is controversial and for this reason we recommend using only one method and not combining them.

La medición de la composición corporal se ha convertido en un componente importante en el diagnóstico de la salud, el acondicionamiento físico y el estado nutricional. El objetivo de este estudio fue comparar dos métodos para detectar la composición corporal, la impedancia bioeléctrica y la pletismografía de desplazamiento de aire para atletas y no atletas. Específicamente, comparamos los parámetros como masa grasa, masa libre de grasa y el valor de la tasa metabólica basal. Un tamaño de muestra de 52 hombres (edad 26,2 ± 5,4 años) de un grupo de luchadores de artes marciales mixtas (MMA) (n = 31, edad 27,2 ± 5,5 años) y un grupo de no deportistas (n = 21, edad 24,6 ± 5,1 años). Ambos grupos se midieron por impedancia bioeléctrica y pletismografía de desplazamiento de aire. Se observaron diferencias significativas en el porcentaje de grasa corporal (p<0,05) y la masa libre de grasa (p<0,05) entre la impedancia bioeléctrica y la pletismografía de desplazamiento de aire de los no deportistas, sin embargo no hubo diferencias significativas en los atletas. Además, se observó una diferencia significativa (p<0,001) de la tasa metabólica basal entre la impedancia bioeléctrica y la pletismografía de desplazamiento de aire, pero la correlación con la masa libre de grasa fue importante para ambos métodos. Por lo tanto, el uso de la pletismografía de impedancia bioeléctrica y desplazamiento de aire puede ser útil para detectar cambios en la composición corporal, pero su precisión es controvertida por lo que recomendamos usar solo un método y no una combinación de ambos.

Estudo comparativo entre as medidas da pressão ocular dos tonômetros de rebote, pneumático e de Goldmann / Comparative study between ocular pressure measurements made by rebot tonometer, pneumatic tonometer, Goldmann tonometry

RESUMO Objetivo: Comparar o resultado entre dois tipos de tonômetros, tendo como padrão ouro a tonometria de aplanação, relacionando com a espessura corneana e suas validações como instrumentos de rastreio populacional. Métodos: Estudo transversal comparativo, realizado com 400 olhos do ambulatório de oftalmologia da Adachi Oftalmologia, em Macapá (Amapá), entre os valores médios da pressão ocular medidos pelo tonômetro Icare®, o Tonômetro Pneumático e o Tonômetro de Aplanação de Goldmann em função da espessura corneana. Foram divididos conforme a ECC em 3 grupos. Grupo 1: 260 olhos com ECC< 530µ; grupo 2: 217 olhos com ECC entre 530µ e 590µ; e, grupo 3: 157 olhos com ECC>590µ. Resultados: A ECC média obtida na paquimetria foi de 557µ, variando de 651µ a 477µ (desvio padrão de 32.9). A PIO média obtida pela TP foi de 19,4 mmHg (com desvio padrão de 2,32); pelo Icare® foi de 16,7mmHg (desvio padrão de 2,12); e, na TAG foi de 15.5 mmHg (desvio padrão de 2,02). Para paquimetrias inferiores a 530µ e superiores a 590µ a PIOm não diferiu significativamente entre a TAG e Icare® (p = 0,232), sendo estatisticamente significativa diferença obtida para córneas com ECC entre 530 e 590 µ. A PIOm obtida pelo TP foi significativamente maior do que a pressão ocular média dos TAG e Icare® (p < 0,001 para ambos) em todos os grupos. Conclusões: Os três métodos podem ser utilizados em campanhas de rastreamento, porém o Icare® se mostrou mais confiável que a TP, com valores obtidos estatisticamente mais confiáveis quando comparados à TP. Existe suficiente concordância entre o Icare e a TAG para recomendar o seu uso.

ABSTRACT Objective: To compare the result between two types of tonometres, using as gold standard the aplanation tonometry, relating to the corneal thickness and its validations as instruments of population screening. Methods: A comparative cross-sectional study was carried out with 400 eyes from the ophthalmology clinic of Adachi Ophthalmology, in Macapá (Amapá), between the mean values of ocular pressure measured by the Icare® tonometro, the Pneumatic Tonometer and the Goldmann Flattening Tonometro as a function of corneal thickness. They were divided according to ECC in 3 groups. Group 1: 260 eyes with ECC <530µ; group 2: 217 eyes with ECC between 530µ and 590µ; and, group 3: 157 eyes with ECC> 590µ. Results: The mean ECC obtained in pachymetry was 557µ, ranging from 651µ to 477µ (standard deviation of 32.9). The mean IOP obtained by PT was 19.4 mmHg (with a standard deviation of 2.32); by Icare® was 16.7mmHg (standard deviation of 2.12); and in the TAG it was 15.5 mmHg (standard deviation of 2.02). For pachymetry less than 530µ and greater than 590µ, PIOm did not differ significantly between TAG and Icare® (p = 0.232), and a statistically significant difference was obtained for corneas with ECC between 530 and 590 µ. The IOP obtained by the PT was significantly higher than the mean ocular pressure of the TAG and Icare® (p <0.001 for both) in all groups. Conclusions: All three methods can be used in screening campaigns, but Icare® proved to be more reliable than TP, with values obtained statistically more reliable when compared to TP. There is sufficient agreement between Icare and TAG to recommend its use.

Decrease in Serum Amyloid a Protein Levels Following Three-month Stays in Negatively Charged Particle-dominant Indoor Air Conditions / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>The changes in serum adipokines and cytokines related to oxidative stress were examined during 3 months 'Off to On' and 'On to Off' periods using negatively charged particle-dominant indoor air conditions (NCPDIAC).</p><p><b>METHODS</b>Seven volunteers participated in the study, which included 'OFF to 3 months ON' periods (ON trials) for a total of 16 times, and 'ON to 3 months OFF' (OFF trials) periods for a total of 13 times.</p><p><b>RESULTS</b>With the exception of one case, serum amyloid A (SAA) levels decreased significantly during the ON trials.</p><p><b>CONCLUSION</b>Considering that SAA is an acute phase reactive protein such as C reactive protein (CRP), this observed decrease might indicate the prevention of cardiovascular and atherosclerotic changes, since an increase in high-sensitive CRP is associated with the subsequent detection of these events.</p>

Una notable convergencia semántica: infección y miasma / A remarkable semantic convergence: infection and miasma

Resumen Se analiza el desarrollo histórico de los términos "infección" y "miasma". Se entendía por miasma un tipo de aire corrupto o pestilente que emanaba de cuerpos en putrefacción y que propalaba las enfermedades infecciones. Dicho concepto fue el dominante para comprender la causa de las enfermedades infecciosas desde la antigüedad hasta los albores de la teoría microbiana. El concepto de infección tuvo inicialmente un significado similar al de miasma, pero actualmente se define como la invasión de un hospedero por un agente infeccioso. En este trabajo se discutirá que ambos términos derivan del mismo concepto original.

The historical development of the terms "infection" and "miasma" is analyzed. Miasma was understood as a kind of corrupt or pestilent air that emanated from putrefactive bodies and spread infectious diseases. This concept was the dominant one to understand the cause of infectious diseases from antiquity to the dawn of the microbial theory. The concept of infection initially had a similar meaning to miasma, but is currently defined as the invasion of a host by an infectious agent. It will be discussed in this paper that both terms derive from the same original concept.

Isoenzyme genotyping and phylogenetic analysis of oxacillin-resistance Staphylococcus aureus isolates

Aim: The propagation of S. aureus in hospital and dental environments is considered an important public health problem since resistant strains can cause serious infections in humans. The genetic variability of 99 oxacillin-resistant S. aureus isolates (ORSA) from the dental patients (oral cavity) and environments (air) was studied by isoenzyme genotyping. Methods: S. aureus isolates were studied using isoenzyme markers (alcohol dehydrogenase, sorbitol dehydrogenase, mannitol-1-phosphate dehydrogenase, malate dehydrogenase, glucose dehydrogenase, D-galactose dehydrogenase, glucose-6-phosphate dehydrogenase, catalase and α/ß-esterase) and genetic (Nei's statistics) and cluster analysis (UPGMA algorithm). Results: A highly frequent polyclonal pattern was observed in this population of ORSA isolates, suggesting various sources of contamination or microbial dispersion. Genetic relationship analysis showed a high degree of polymorphism between the strains, and it revealed three taxa (A, B and C) distantly genetically related (0.653≤dij≤1.432) and fifteen clusters (I to XV) moderately related (0.282≤dij<0.653). These clusters harbored two or more highly related strains (0≤dij<0.282), and the existence of microevolutionary processes in the population of ORSA. Conclusion: This research reinforces the hypothesis of the existence of several sources of contamination and/or dispersal of ORSA of clinical and epidemiologically importance, which could be associated with carriers (patients) and dental environmental (air) (AU)

Contaminante atmosférico: Material particulado / Air pollutant: Particulate material

La atmósfera contiene varios gases que, en concentraciones mayores que las normales, pueden ser peligrosos para los seres humanos, animales y plantas. Todos estos gases potencialmente tóxicos se denominan "contaminantes del aire". Entre ellos se encuentran: monóxido de carbono (CO), el dióxido de azufre (SO2) y el dióxido de nitrógeno (NO2). Además de los gases, la atmósfera contiene una gran variedad de partículas sólidas y líquidas, de variados tamaños. El material particulado en suspensión (MPS) en el aire incluye partículas totales en suspensión (PTS), material particulado con diámetro aerodinámico mediano inferior a 10 µm (MP 10) y 2,5 µm (MP 2,5) respectivamente, partículas finas y ultrafinas. Se presentan una serie de gráficos que permiten observar los valores de Material Particulado menor a 10 micrones (PM 10), en las estaciones de Monitoreo de Calidad del Aire que posee la Ciudad de Buenos Aires (La Boca,Parque Centenario y Córdoba), las cuales registran las concentraciones de éste contaminante en forma continua (durante 24 horas, los 365 días del año), mediante métodos homologados internacionalmente. (AU)

Colonoscopy: randomized comparative study of insufflation with carbon dioxide versus air / Colonoscopia: estudo comparativo randomizado deinsuflação com co 2 e ar

ABSTRACT Background: In Brazil, an increasing number of people are submitted to colonoscopy, either for screening or for therapeutic purposes. Aim: To evaluate whether there are advantages of using carbon dioxide (CO2) over air for insufflation. Methods: Two hundred and ten of 219 patients were considered eligible for this study and were randomized into two groups according to the gas insufflation used: Air Group (n=104) and CO2 Group (n=97). The study employed a double-blind design. Results: The Air and CO2 Groups were similar in respect to bowel preparation evaluated using the Boston scale, age, gender, previous surgery, maneuvers necessary for the advancement of the device, and presence of polyps, tumors or signs of diverticulitis. However, "waking up with pain" and "pain at discharge" were more prevalent in the Air Group, albeit not statistically significant, with post-exam bloating seen only in the Air Group. The responses to a questionnaire, applied to analyze the late post-exam period, showed more comfort with the use of CO2. Conclusions: The use of CO2 is better than air as it avoids post-examination bloating, thereby providing greater comfort to patients.

RESUMO Racional: No Brasil, estima-se crescente aumento da população submetida à colonoscopia, apesar do desconforto do exame, decorrente sobretudo da insuflação colônica. Objetivo: Verificar se há vantagens do uso de CO2 sobre o ar como elemento de insuflação. Métodos: Um total de 219 participantes foram submetidos à análise de elegibilidade e dele extraíram-se 210 eleitos, que foram randomizados em dois grupos, de acordo com o elemento utilizado: ar, n=104 e CO2, n=97. O ensaio seguiu o modelo duplo-cego. Resultados: Os grupos demonstraram-se similares quando cotejados preparo intestinal avaliado pela Escala de Boston, idade, gênero, operação prévia, manobras necessárias para progressão do aparelho, presença de pólipo, tumor ou sinais de diverticulite, valorizando a comparação entre eles quanto ao elemento de insuflação. Então, observou-se que "acordar com dor" e a presença de dor na ocasião da alta foram bem mais prevalentes no "Grupo Ar", embora sem diferença estatisticamente significante, sendo a distensão pós-exame observada apenas no "Grupo Ar". De acordo com o questionário clínico aplicado para análise do período tardio pós-exame, as respostas apontaram muito mais conforto com o uso do CO2. Os elementos de insuflação não pareceram modificar substancialmente os aspectos técnicos do exame nem provocar índices expressivos de enantema da mucosa. Conclusão: O uso do dióxido de carbono é superior ao ar, pois evita a distensão abdominal pós-exame conferindo maior conforto aos pacientes no período pós-exame.

Characterization of Conventional and High-Translucency Y-TZP Dental Ceramics Submitted to Air Abrasion

Abstract This study evaluated the effect of air-abrasion on t®m phase transformation, roughness, topography and the elemental composition of three Y-TZP (Yttria-stabilized tetragonal zirconia polycrystal) dental ceramics: two conventional (Lava Frame and IPS ZirCad) and one with high-translucency (Lava Plus). Plates obtained from sintered blocks of each ceramic were divided into four groups: AS (as-sintered); 30 (air-abrasion with 30 mm Si-coated Al2O3 particles); 50 (air-abrasion with 50 mm Al2O3 particles) and 150 (air-abrasion with 150 mm Al2O3 particles). After the treatments, the plates were submitted to X-ray diffractometry; 3-D profilometry and SEM/EDS. The AS surfaces were composed of Zr and t phases. All treatments produced t®m phase transformation in the ceramics. The diameter of air-abrasion particles influenced the roughness (150>50>30>AS) and the topography. SEM analysis showed that the three treatments produced groove-shaped microretentions on the ceramic surfaces, which increased with the diameter of air-abrasion particles. EDS showed a decrease in Zr content along with the emergence of O and Al elements after air-abrasion. Presence of Si was also detected on the plates air-abraded with 30 mm Si-coated Al2O3 particles. It was concluded that irrespective of the type and diameter of the particles, air-abrasion produced t®m phase transformation, increased the roughness and changed the elemental composition of the three Y-TZP dental ceramics. Lava Plus also behaved similarly to the conventional Y-TZP ceramics, indicating that this high translucency ceramic could be more suitable to build monolithic ceramic restorations in the aesthetic restorative dentistry field.

Resumo Este estudo avaliou o efeito da abrasão a ar na transformação de fase t®m, na rugosidade, topografia e composição elementar de três cerâmicas Y-TZP (Zircônia tetragonal policristalina estabilizada por ítrio): duas convencionais (Lava Frame e ZirCad) e uma de alta translucidez (Lava Plus). Placas obtidas de blocos sinterizados de cada cerâmica foram divididos em quatro grupos: AS (pré-sinterizado); 30 (jateamento com partículas de Al2O3 de 30 mm cobertas com Si); 50 (jateamento com partículas de Al2O3 de 50 mm) e 150 (jateamento com partículas de Al2O3 de 150 mm). Após os tratamentos, as placas foram submetidas à difratometria de Rx, perfilometria 3-D e microscopia eletrônica de varredura com espectroscopia de energia dispersiva de Rx (SEM/EDS). As superfícies pré-sinterizadas apresentaram predominantemente Zr e fase tetragonal. Todos os tratamentos superficiais produziram transformação t®m nas cerâmicas avaliadas. A topografia e a rugosidade foram influenciadas pelo diâmetro das partículas abrasivas (150>50>30>AS). A análise através de SEM mostrou que os três tratamentos produziram fendas retentivas nas superfícies das cerâmicas, por influência do tamanho das partículas. A análise através de EDS mostrou uma diminuição da concentração de Zr, paralela ao surgimento de O e Al, após o jateamento. No grupo tratado com partículas de Al2O3 de 30 mm cobertas com Si foi também observado um aumento de Si após o jateamento. Concluiu-se que, independente do tipo e do diâmetro das partículas, o jateamento produziu transformação t®m, aumentou a rugosidade e alterou a composição elementar das cerâmicas avaliadas. A Lava Plus apresentou comportamento semelhante às cerâmicas convencionais, indicando que esta cerâmica de alta translucidez pode ser mais adequada à confecção de restaurações monolíticas no campo da odontologia estética restauradora.

Comparison of 20% sulfur hexafluoride with air for intraocular tamponade in Descemet membrane endothelial keratoplasty (DMEK) / Comparação de hexafluoreto de enxofre a 20% com ar para tamponamento intraocular na ceratoplastia endotelial de membrana Descemet (DMEK)

ABSTRACT Purpose: To compare the effect of 20% sulfur hexafluoride (SF6) with that of air on graft detachment rates for intraocular tamponade in Descemet membrane endothelial keratoplasty (DMEK). Methods: Forty-two eyes of patients who underwent DMEK by a single surgeon (A.S.J.) at Wilmer Eye Institute between January 2012 and 2014 were identified; 21 received air for intraocular tamponade and the next consecutive 21 received SF6. The main outcome measure was the graft detachment rate; univariate and multivariate analyses were performed. Results: The graft detachment rate was 67% in the air group and 19% in the SF6 group (p<0.05). No complete graft detachments occurred, and all partial detachments underwent intervention with injection of intraocular air. The percentages of eyes with 20/25 or better vision were not different between the groups (67% vs. 71%). Univariate analysis showed significantly higher detachment rates with air tamponade (OR, 8.50; p<0.005) and larger donor graft size (OR, 14.96; p<0.05). Multivariate analysis with gas but not graft size included showed that gas was an independent statistically significant predictor of outcome (OR, 6.65; p<0.05). When graft size was included as a covariate, gas was no longer a statistically significant predictor of detachment but maintained OR of 7.81 (p=0.063) similar to the results of univariate and multivariate analyses without graft size. Conclusion: In comparison with air, graft detachment rates for intraocular tamponade in DMEK were significantly reduced by 20% SF6.

RESUMO Objetivo: Comparar as taxas de descolamento do botão endotelial com o uso de gás hexafluoreto de enxofre a 20% (SF6) em relação ao ar para o tamponamento intraocular na ceratoplastia endotelial da membrana de Descemet (DMEK). Métodos: Quarenta e dois olhos foram operados com a técnica de DMEK por um único cirurgião (A.S.J.) no Wilmer Eye Institute entre janeiro de 2012 a 2014. Os primeiros 21 olhos receberam ar para o tamponamento intraocular após o enxerto do botão endotelial e os 21 olhos seguintes receberam SF6. O desfecho primário medido foi a taxa de descolamento do botão endotelial por análise univariada e multivariada. Resultados: A taxa de descolamento do botão endotelial foi de 67% no grupo que recebeu ar vs 19% no grupo que recebeu SF6 (p<0,05). Não houve nenhum descolamento total de botão e todos os parciais foram tratados com injeção de ar intraocular. Não houve diferença estatística significativa entre os grupos em relação a AV de 20/25 ou melhor (67% vs 71%). A análise univariada demonstrou maior taxa de descolamento com o tamponamento por ar intraocular (OR 8,50, p<0,005) e com botões doadores maiores (OR 14,96, p<0,05). Na análise multivariada, incluindo gás, mas não o tamanho do botão doador, o tipo de gás usado permaneceu sendo um fator preditivo independente e estatisticamente significativo para o desfecho primário, com OR de 6,65 (p<0,05). Porém, quando o tamanho do botão doador foi incluso como covariável, o gás perdeu a sua significância como preditor de descolamento, mantendo o OR de 7,81 (p=0,063), semelhante as análises univariada e multivariada excluindo o tamanho do botão doador. Conclusão: O uso de gás hexafluoreto de enxofre a 20% (SF6) para o tamponamento intraocular reduz a taxa de descolamento do botão endotelial quando comparado ao uso de ar no DMEK.

Zonas de exposición ambiental a mercurio y relación con marcadores biológicos en población de Bogotá / Environmental Areas Exposed to Mercury and a Relationship Against Biomarkers in Bogotá Population / Zonas de Exposição Ambiental a Mercúrio e Relação com Marcadores Biológicos na População de Bogotá

Introducción: El mercurio es un metal pesado, potencialmente tóxico para los ecosistemas y los seres humanos. En Bogotá no se realizan mediciones directas y no se cuenta con un mapa distrital de concentraciones de dicho contaminante. Objetivo: Establecer si hay una posible relación entre las zonas de exposición ambiental a mercurio y las concentraciones encontradas en marcadores biológicos de población general de Bogotá-Colombia, 2012/2013. Materiales y métodos: Estudio descriptivo como análisis secundario de las concentraciones de los marcadores biológicos de mercurio obtenidas de la investigación "Prevalencia de mercurio y plomo en población general de Bogotá 2012/2013" y la construcción de un mapa de zonas de exposición ambiental por este contaminante, con el fin de determinar posibles relaciones de exposición, por medio de razones de prevalencia y prueba 2. Resultados: Edad promedio de 46,5 años, rango de 3-91; el 74,8 % eran mujeres. Promedio de mercurio de 0,29 µg/L en orina, 3,13 µg/L en sangre y 1 µg/g en cabello. Se encontró que los promedios de las concentraciones de mercurio fueron superiores en la zona de exposición alta; sin embargo, no se presentaron diferencias estadísticamente significativas entre las concentraciones de mercurio por zonas de exposición. Conclusión: La contaminación por Hg es una problemática de toda la ciudad, posiblemente asociada con variables no ambientales que no fueron tenidas en cuenta en el estudio, como el consumo de productos derivados de la pesca. Se requiere realizar mediciones directas de mercurio en aire para generar mapas de exposición al contaminante en la ciudad.

Introduction: Mercury is a potentially toxic heavy metal for ecosystems and humans. In Bogota area, there are not direct measurements and there is not any district map of concentrations of such a pollutant. Objective: Establishing a possible relation between areas of environmental exposed against mercury and the relevant concentrations found in biomarkers of overall population in Bogota, Colombia, 2012/2013. Materials and methods: A descriptive study as a secondary analysis of the mercury biomarker concentrations got from research "Mercury-and-lead prevalence in overall population, Bogota 2012/2013", and mapping environmental exposure areas by this pollutant in order to establish potential exposure ratios through prevalence ratios and chi-square test. Results: 46,5-year mean age; range (3-91); 74,8 % women, average mercury 0,29 µg/L urine, 3,13 µg/L blood, 1 µg/g hair, resulting mercury concentrations averages higher within the high exposure area, however, there were no statistically significant differences between mercury concentrations by exposure areas. Conclusion: Hg contamination is a problematic issue of the whole city, maybe related to non-environmental variables not taken into account in the study, such as the consumption of fishery products. Direct air mercury measurements are required to map pollutant exposure against the city.

Introdução: O mercúrio é um metal pesado potencialmente tóxico para os ecossistemas e os seres humanos. Em Bogotá não se realizam medições diretas e também não se conta com um mapa distrital de concentrações do dito contaminante. Objetivo: Estabelecer si existe uma possível relação entre zonas de exposição ambiental a mercúrio e as concentrações achadas nos marcadores biológicos da população geral de Bogotá-Colômbia, 2012/2013. Materiais e métodos: Estudo descritivo como análise secundário das concentrações dos marcadores biológicos de mercúrio obtidas da pesquisa de "Prevalência de mercúrio e chumbo na população geral de Bogotá 2012/2013" e a elaboração de um mapa de zonas de exposição ambiental por esse contaminante para determinar possíveis relações de exposição através de razões de prevalência e prova 2. Resultados: Idade média 46,5 anos; rango 3-91; 74,8 % mulheres média de mercúrio, 0,29 µg/L urina; 3,13 µg/L sangue; 1 µg/g cabelos. Achou-se que as médias das concentrações de mercúrio foram superiores na zona de alta exposição, no entanto, não se apresentaram diferencias estatisticamente significativas entre as concentrações de mercúrio por zonas de exposição. Conclusão: A contaminação por Hg é uma problemática da cidade toda, possivelmente associada com variáveis não ambientais que não foram levadas em conta no estudo, como o consumo de produtos derivados da pesca. Precisam-se realizar medições diretas de mercúrio no ar a fim de gerar mapas de exposição ao contaminante na cidade.

Liquid chromatography for determination of disulfiramin workplace atmosphere / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To establish a method for determination of disulfiram in the workplace atmosphere by liquid chromatography.</p><p><b>METHODS</b>Sampling with glass fiber filter, eluting with methanol, separating with C18 column, and determination with liquid chromatography.</p><p><b>RESULTS</b>The bearing capacity of glass fiber filter exceeded 3.45 mg per piece. The elution efficiency was 97.8%∼101.0% The relative standard deviation varied from 1.09% to 1.44%. The limit of detection was 0.1 µg/ml. The minimum detectable concentration was 0.011 mg/m³ (with sampled air volume of 45 L).</p><p><b>CONCLUSION</b>The method has high selectivity, accuracy, and precision and strong applicability.</p>

Solvent desorption gas chromatography for determination of allyl chloride in workplace atmosphere / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To establish a method for determination of allyl chloride in the workplace atmosphere by solvent desorption-capillary column gas chromatography.</p><p><b>METHODS</b>Allyl chloride in the atmosphere was adsorbed by activated charcoal tubes and desorbed using dichloromethane, and was then separated by capillary column gas chromatography and determined by flame ionization detector.</p><p><b>RESULTS</b>The concentration of allyl chloride showed a good linear relationship within the range of 0∼200 µg/ml. The linear regression equation was y = 1.27x-0.22 with the correlation coefficient r being 0.999 8. The limit of detection was 0.20 µg /mL. If 7.5 L of air was sampled, the minimum detectable concentration was 0.03 mg/m³. The intra-day and inter-day relative standard deviations (RSD) of repetitive measurement at the high, middle, and low concentration levels were 2.7%∼4.8%. The average sampling efficiency was 100%. The overall desorption efficiency was 94.4%. The breakthrough volume was over 0.59 mg (100 mg activated charcoal).</p><p><b>CONCLUSION</b>The method applies to the determination of allyl chloride in the workplace atmosphere.</p>