Made available in DSpace on 2014-10-09T12:48:28Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:57:28Z (GMT). No. of bitstreams: 1 09066.pdf: 3054181 bytes, checksum: 62e4252d9f76ef15308c15317e1fca18 (MD5) / Dissertacao (Mestrado profissionalizante em lasers em Odontologia) / IPEN/D-MPLO / Intituto de Pesquisas Energeticas e Nucleares, IPEN/CNEN-SP; Faculdade de Odontologia, Universidade de Sao Paulo

Made available in DSpace on 2014-10-09T12:52:11Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:58:13Z (GMT). No. of bitstreams: 0 / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

Made available in DSpace on 2014-10-09T12:48:28Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:57:28Z (GMT). No. of bitstreams: 1 09066.pdf: 3054181 bytes, checksum: 62e4252d9f76ef15308c15317e1fca18 (MD5) / Dissertacao (Mestrado profissionalizante em lasers em Odontologia) / IPEN/D-MPLO / Intituto de Pesquisas Energeticas e Nucleares, IPEN/CNEN-SP; Faculdade de Odontologia, Universidade de Sao Paulo

Made available in DSpace on 2014-10-09T12:52:11Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:58:13Z (GMT). No. of bitstreams: 0 / Neste trabalho foram avaliados aventais de proteção e blindagens de ovário de cinco fabricantes segundo as normas NBR / IEC 61331-1 e NBR / IEC 61331-3 de 2004. Para a determinação da espessura equivalente de atenuação foram aplicadas três metodologias diferentes (interpolação linear, modelo de Archer e somatório de exponenciais), uma vez que a norma não indica como este valor deve ser obtido. Além disso, foram estimadas as incertezas associadas a cada método e a influência do número de medições na incerteza combinada. As características de confecção avaliadas foram: documento acompanhante, projeto, materiais, dimensões e marcação da etiqueta. Para esta avaliação foi elaborado um formulário que contemplava todas as exigências da NBR / IEC 61331-3. Os resultados mostraram uma grande diferença entre os valores de espessura equivalente de atenuação declarados e medidos. A comparação dos resultados das três metodologias aplicadas mostrou que há pouca variação entre os valores obtidos e entre as incertezas associadas nas diferentes metodologias. Foi possível observar também que o número de medições não contribui significativamente para o aumento da incerteza nas três metodologias. A metodologia que melhor se adequou à rotina do laboratório foi a metodologia da interpolação linear com cinco medições da taxa de kerma no ar. A discrepância entre os resultados apresentados neste trabalho e as exigências das normas estudadas mostra a necessidade de tornar compulsória a certificação dos dispositivos de proteção, contribuindo assim para o aumento da proteção radiológica do usuário. / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2016-01-08T11:03:23Z No. of bitstreams: 2 Tese - Heliny Carneiro Cunha Neves - 2015.pdf: 1152827 bytes, checksum: 4bccda1807b733bcca194a438795410f (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-01-08T11:05:52Z (GMT) No. of bitstreams: 2 Tese - Heliny Carneiro Cunha Neves - 2015.pdf: 1152827 bytes, checksum: 4bccda1807b733bcca194a438795410f (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Made available in DSpace on 2016-01-08T11:05:52Z (GMT). No. of bitstreams: 2 Tese - Heliny Carneiro Cunha Neves - 2015.pdf: 1152827 bytes, checksum: 4bccda1807b733bcca194a438795410f (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2015-09-15 / Inappropriate behaviors of healthcare workers about the use and the handling lab coat represent a risk to the patient and the professional, family and community. The recommendations in this area are guided on limited evidences and the specific norms for the standardization of practices for use and handling is fragile. OBJECTIVE: To analyze the use and handling of lab coats by healthcare workers. METHODS: Cross-sectional, observational and analytical study conducted with 103 healthcare workers in a public teaching hospital, located in the Center-West of Brazil. The characteristics of the lab coats, the data regarding the transport and the handwashing practice before wearing and after removing the lab coat were observed at the arrival timing and exit of the unit and registered in check list. The use of clothes and larger contact areas with surfaces and patients were observed at the time of procedures execution. Sociodemographic and occupational data and the worker's conduct about lab coat handling were collected through interview after the observation period of each professional. To estimate the factors associated with misconduct of healthcare workers as hand hygiene, transportation and exchange frequency of lab coat the univariate analysis was performed. Then variables with p <0.10 were included in the Poisson regression model. The chi-square test was used to verify the differences between the ratios and p values <0.05 were considered statistically significant. RESULTS: The workers used the lab coat and the gown to the different clinical situations observed, without clarity when to use each clothes. Fists and abdominal region of lab coats and gown were areas that had higher patient contact and higher environmental surfaces contact. Workers had inappropriate handling about the lab coats transport, exchange frequency, washing process and hand hygiene. Were predictors for misconduct about the exchange frequency of lab coat, to be physicians and other healthcare workers male, with shorter professional practice and reporting inadequate practice to transport lab coats. Were associated with inadequate practices of lab coats transport, have misconduct about the exchange frequency and the physicians workers. CONCLUSIONS: The conduct of workers using their own lab coat like a protective equipment and transports to process at home are inadequate and can endanger the health and safety of workers, their families and patients. These findings show that the lab coat worker must not be used as personal protective equipment in clinical practice. / Comportamentos inadequados dos trabalhadores da saúde em relação ao uso e manuseio do jaleco representam um risco tanto para o paciente como para o próprio profissional, familiares e comunidade. As recomendações nessa área são pautadas em evidências limitadas e a normatização específica para a padronização das práticas para o seu uso e manuseio é frágil. OBJETIVO: Analisar o uso e manuseio do jaleco pelos trabalhadores da área da saúde. MÉTODOS: Estudo transversal, observacional, analítico, realizado com 103 trabalhadores da saúde de um hospital público, de ensino, situado na região Centro-Oeste do Brasil. As características dos jalecos, os dados em relação ao transporte e a prática de higienização das mãos antes de vestir e após retirar o jaleco foram observados no momento da entrada e da saída da unidade e registrados em check list. O uso das vestimentas e os locais de maior contato com superfícies e com os pacientes foram observados no momento da execução dos procedimentos. Os dados sociodemográficos, ocupacionais e as condutas do trabalhador sobre o manuseio do jaleco foram coletados por meio de entrevista após o período de observação de cada profissional. Para estimar os fatores associados às condutas inadequadas dos trabalhadores quanto à higienização das mãos, transporte e frequência de troca do jaleco foi realizada análise univariada. Em seguida, variáveis com p < 0,10 foram incluídas no modelo de Regressão de Poisson. O teste de qui-quadrado foi utilizado para verificar as diferenças entre as proporções e valores de p < 0,05 foram considerados estatisticamente significantes. RESULTADOS: Os trabalhadores utilizaram tanto o jaleco quanto o avental para as diferentes situações clínicas observadas, sem muita clareza de quando usar cada vestimenta. Os punhos e a região abdominal dos jalecos e dos aventais foram as áreas que apresentaram maior contato com o paciente e com as superfícies ambientais. Os trabalhadores apresentaram manuseio inadequado quanto ao transporte do jaleco, frequência de troca, processo de lavagem e higienização das mãos. Foram preditores para a conduta inadequada em relação à frequência de troca do jaleco ser trabalhador da categoria médica e outros trabalhadores da saúde, do sexo masculino, com menor tempo de atuação profissional e que relataram prática inadequada em relação ao transporte do jaleco. Foram associadas às práticas inadequadas do transporte do jaleco, ter conduta inadequada em relação à frequência de troca e os trabalhadores da categoria médica. CONCLUSÕES: As condutas dos trabalhadores que utilizam o próprio jaleco como equipamento de proteção e o transporta para processar no domicílio são inadequadas e podem colocar em risco a saúde e segurança do trabalhador, seus familiares e dos pacientes. Esses achados evidenciam que o jaleco próprio do trabalhador não deve ser utilizado como equipamento de proteção individual na prática clínica.

Thesis (D. Tech. (Environmental Health)) -- Central University of technology, Free State, 2013 / Some epidemiological studies suggest that exposure to high levels of electromagnetic fields (EMFs) may be linked with the development of adverse health effects. However there is still controversy on this matter. Due to rapid technological growth in the modern society, employees in the welding and electrical industries are highly exposed to electromagnetic fields and may be at a high risk for developing occupational diseases. The health effects which may result from exposure to electromagnetic fields are related to the strength and frequency of the fields. This study was conducted to (i) assess the exposure levels to EMFs in the welding industry, (ii) determine the possible health risks associated with exposure levels, and (iii) develop a health and safety model to guide the industry on how to reduce exposure to EMFs. The study was conducted in one mega welding company in the Mangaung Metropolitan Municipality. Welders, fitters and office workers (88 in total) gave consent to participate in the study and completed questionnaires (ethical clearance attached). Measurements of extremely low frequency EMFs were taken in workshop A, workshop B and working offices. Measurements for magnetic fields were taken at distances of 1, 2 and 3 meters (m) from the EMFs sources. The exposure levels of magnetic fields were very high in the workshops, with welders and fitters exposed to about 7.6 microtesla (μT). Electric fields were relatively low in all workstations. Participants in the study were experiencing symptoms of ill health such as headaches, sleep disorders, fatigue and distress. The symptoms reported by the workers were similar in the both groups (exposed and control). There is no clear relationship between recorded exposure levels and the development of the reported symptoms. The health and safety model was developed to guide the industry to reduce exposure to electromagnetic fields. The model describes the implementation of engineering and administrative control measures in an effort to reduce exposure to EMFs. The model also highlights the importance of wearing personal protective equipment to shield against EMFs amongst others. This study suggests that occupational exposure to high levels of extremely low frequency EMFs may increase the risk for development of chronic diseases such as leukaemia, brain and breast cancer and other diseases among highly exposed employees. Implementation of safety measures is necessary to reduce exposure to EMFs.

Neste trabalho foram avaliados aventais de proteção e blindagens de ovário de cinco fabricantes segundo as normas NBR / IEC 61331-1 e NBR / IEC 61331-3 de 2004. Para a determinação da espessura equivalente de atenuação foram aplicadas três metodologias diferentes (interpolação linear, modelo de Archer e somatório de exponenciais), uma vez que a norma não indica como este valor deve ser obtido. Além disso, foram estimadas as incertezas associadas a cada método e a influência do número de medições na incerteza combinada. As características de confecção avaliadas foram: documento acompanhante, projeto, materiais, dimensões e marcação da etiqueta. Para esta avaliação foi elaborado um formulário que contemplava todas as exigências da NBR / IEC 61331-3. Os resultados mostraram uma grande diferença entre os valores de espessura equivalente de atenuação declarados e medidos. A comparação dos resultados das três metodologias aplicadas mostrou que há pouca variação entre os valores obtidos e entre as incertezas associadas nas diferentes metodologias. Foi possível observar também que o número de medições não contribui significativamente para o aumento da incerteza nas três metodologias. A metodologia que melhor se adequou à rotina do laboratório foi a metodologia da interpolação linear com cinco medições da taxa de kerma no ar. A discrepância entre os resultados apresentados neste trabalho e as exigências das normas estudadas mostra a necessidade de tornar compulsória a certificação dos dispositivos de proteção, contribuindo assim para o aumento da proteção radiológica do usuário. / In this work protective devices of five manufacturers were evaluated according to the NBR/IEC 61331-1 and NBR/IEC 61331-3 standards. Three different methodologies (linear interpolation, Archer model and sum of exponentials) were applied for the determination of the attenuation equivalent, since the standard does not indicate how it must be determined. Moreover, the uncertainties associated to each method, and the influence of the number of measurements in the combined uncertainty were estimated. The evaluated manufacture characteristics were: accompanying document, design, materials, dimensions and label marking. For this evaluation a check list about the requirements of the NBR/IEC 61331-3 standard was elaborated. The results showed a great difference between nominal and measured attenuation equivalent values. The comparison of the results using the three methodologies showed small variations among the obtained values and among the associated uncertainties in the different methodologies. It was possible to observe that the number of measurements does not contribute significantly for the increase of the uncertainty in all three methodologies. The best methodology for the laboratory routine is the linear interpolation methodology, with five measurements for each air kerma rate value. The discrepancy between the results obtained in this work and the requirements of the applied standards show the need to adopt a compulsory certification process for protective devices, thus contributing for the increase of the radiation protection of the users.

Neste trabalho foram avaliados aventais de proteção e blindagens de ovário de cinco fabricantes segundo as normas NBR / IEC 61331-1 e NBR / IEC 61331-3 de 2004. Para a determinação da espessura equivalente de atenuação foram aplicadas três metodologias diferentes (interpolação linear, modelo de Archer e somatório de exponenciais), uma vez que a norma não indica como este valor deve ser obtido. Além disso, foram estimadas as incertezas associadas a cada método e a influência do número de medições na incerteza combinada. As características de confecção avaliadas foram: documento acompanhante, projeto, materiais, dimensões e marcação da etiqueta. Para esta avaliação foi elaborado um formulário que contemplava todas as exigências da NBR / IEC 61331-3. Os resultados mostraram uma grande diferença entre os valores de espessura equivalente de atenuação declarados e medidos. A comparação dos resultados das três metodologias aplicadas mostrou que há pouca variação entre os valores obtidos e entre as incertezas associadas nas diferentes metodologias. Foi possível observar também que o número de medições não contribui significativamente para o aumento da incerteza nas três metodologias. A metodologia que melhor se adequou à rotina do laboratório foi a metodologia da interpolação linear com cinco medições da taxa de kerma no ar. A discrepância entre os resultados apresentados neste trabalho e as exigências das normas estudadas mostra a necessidade de tornar compulsória a certificação dos dispositivos de proteção, contribuindo assim para o aumento da proteção radiológica do usuário. / In this work protective devices of five manufacturers were evaluated according to the NBR/IEC 61331-1 and NBR/IEC 61331-3 standards. Three different methodologies (linear interpolation, Archer model and sum of exponentials) were applied for the determination of the attenuation equivalent, since the standard does not indicate how it must be determined. Moreover, the uncertainties associated to each method, and the influence of the number of measurements in the combined uncertainty were estimated. The evaluated manufacture characteristics were: accompanying document, design, materials, dimensions and label marking. For this evaluation a check list about the requirements of the NBR/IEC 61331-3 standard was elaborated. The results showed a great difference between nominal and measured attenuation equivalent values. The comparison of the results using the three methodologies showed small variations among the obtained values and among the associated uncertainties in the different methodologies. It was possible to observe that the number of measurements does not contribute significantly for the increase of the uncertainty in all three methodologies. The best methodology for the laboratory routine is the linear interpolation methodology, with five measurements for each air kerma rate value. The discrepancy between the results obtained in this work and the requirements of the applied standards show the need to adopt a compulsory certification process for protective devices, thus contributing for the increase of the radiation protection of the users.

A dynamic mannequin testing facility has been constructed to test the thermal protective properties of Navy uniforms and protective clothing. The existing facility consists of a traversing mannequin mechanism that passes through a fire that has been spatially characterized by temperature and heat flux measurements. The fire is provided by 8 propane sand burners in a modified ISO 9705 room. The current project is a continuation of work done by WPI Students over the last 5 years. A copper disk surface heat flux transducer has been designed and calibrated in the WPI Cone Calorimeter. The mannequin has been instrumented with 40 of these transducers for the acquisition of heat flux data during fire exposures. Heat Flux data was collected with the bare mannequin and through protective clothing for a range of exposure times. A finite difference method approach is used to model the skins temperature response at the epidermis-dermis interface. This temperature is used to predict 1st and 2nd degree skin burns using Henrique's burn damage integral. The percent total body area (%TBA) affected by burns can be calculated by this method. The facility is now capable of providing comparative data on the relative thermal protection provided by different clothing.

Despite advancements in the development of synthetic fibers and materials that provide better insulation, fire ground burn injuries remain a significant issue. The current test methods for fire fighting clothing were investigated to determine their adequacy in evaluating the actual performance of clothing materials. This investigation uncovered several potential problems with the current test methods. A series of new, small scale, tests were used to evaluate the shortcomings of the current test methods and develop possible improvements. A small test apparatus, designed and donated by Ktech Corporation, was used to measure the thermal properties (thermal conductivity and volumetric heat capacity) of a series of fire fighting clothing materials. The thermal properties were estimated for single fabric layers, as well as ensembles, with various levels of moisture added to simulate actual end use conditions. In addition, a skin simulant sensor was used to assess the time to 2nd degree burn for exposures similar to those required in current standards for fire fighting clothing. A one dimensional heat conduction model was developed to predict the time to 2nd degree burn for the skin simulant sensor protected with outer shell materials that may be used as wildland fire fighting clothing, using the thermal property data obtained from earlier tests. An alternative method was developed to calculate the time to 2nd degree burn for ensembles evaluated with the new skin simulant sensor. The predictions for the time to 2nd degree burn obtained from the new skin simulant sensor were compared against results obtained using the sensor specified in the current test methods. The predictions for the skin simulant sensor were consistently shorter than those from the current test sensor. The current test sensor predictions for the time to 2nd degree burn were nominally 40% to 50% higher than the predictions from the skin simulant sensor during the evaluations of outer shell materials.