335 results on '"Belon P"'
Search Results
2. Assessing support for substance use policies among the general public and policy influencers in two Canadian provinces
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Kimberley D. Curtin, Mathew Thomson, Elaine Hyshka, Ian Colman, T. Cameron Wild, Ana Paula Belon, and Candace I.J. Nykiforuk
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Health policy ,Substance use ,Substance disorder ,Harm reduction ,Public opinion ,Knowledge, attitudes, and beliefs ,Public aspects of medicine ,RA1-1270 ,Social pathology. Social and public welfare. Criminology ,HV1-9960 - Abstract
Abstract Background Examining support for substance use policies, including those for harm reduction, among the general public and policy influencers is a fundamental step to map the current policy landscape and leverage policy opportunities. Yet, this is a knowledge gap in Canada. Our paper identifies the level of support for substance use policies in two provinces in Canada and describes how the level of support is associated with intrusiveness and sociodemographic variables. Methods Data came from the 2019 Chronic Disease Prevention Survey. The representative sample included members of the general public (Alberta n = 1648, Manitoba n = 1770) as well as policy influencers (Alberta n = 204, Manitoba n = 98). We measured the level of support for 22 public policies concerning substance use through a 4-point Likert-scale. The Nuffield Council on Bioethics Intervention Ladder framework was applied to assess intrusiveness. We used cumulative link models to run ordinal regressions for identification of explanatory sociodemographic variables. Results Overall, there was generally strong support for the policies assessed. The general public in Manitoba was significantly more supportive of policies than its Alberta counterpart. Some differences were found between provinces and samples. For certain substance use policies, there was stronger support among women than men and among those with higher education than those with less education. Conclusions The results highlight areas where efforts are needed to increase support from both policy influencers and general public for adoption, implementation, and scaling of substance use policies. Socio-demographic variables related to support for substance use policies may be useful in informing strategies such as knowledge mobilization to advance the policy landscape in Western Canada.
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- 2024
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3. Assessing support for substance use policies among the general public and policy influencers in two Canadian provinces
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Curtin, Kimberley D., Thomson, Mathew, Hyshka, Elaine, Colman, Ian, Wild, T. Cameron, Belon, Ana Paula, and Nykiforuk, Candace I.J.
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- 2024
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4. Effective strategies for Fecal Immunochemical Tests (FIT) programs to improve colorectal cancer screening uptake among populations with limited access to the healthcare system: a rapid review
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Belon, Ana Paula, McKenzie, Emily, Teare, Gary, Nykiforuk, Candace I. J., Nieuwendyk, Laura, Kim, Minji (Olivia), Lee, Bernice, and Adhikari, Kamala
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- 2024
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5. Fatores fisiológicos e patológicos com impacto na qualidade do sono no idoso: uma revisão de literatura
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Larissa Belon Albuquerque and Alfredo Cataldo Neto
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qualidade do sono ,saúde do idoso ,transtornos do sono do ritmo circadiano ,geriatria ,gerontologia ,insônia ,Psychiatry ,RC435-571 - Abstract
Introdução: A qualidade do sono em idosos emerge como um tema de suma relevância, respaldado por dados estatísticos alarmantes. Cerca de 50% da população idosa relata distúrbios do sono, evidenciando a prevalência significativa desses problemas nessa faixa etária. À medida que a idade avança, observa-se um aumento progressivo na incidência de distúrbios do sono, sinalizando a urgência de abordar os fatores subjacentes que contribuem para essa deterioração. Objetivo: Investigar a qualidade do sono em idosos, analisando os fatores fisiológicos e patológicos que influenciam esse fenômeno. Metodologia: Trata-se de uma revisão de literatura com base na análise de artigos científicos publicados no PubMed, Scopus, Scielo, Google Acadêmico e BVS no período de 2019 a 2023. Resultados: Após a conclusão da fase de coleta de dados, foram identificados 6 artigos relevantes para compor a análise do tema proposto. Discussão: Observou-se uma prevalência significativa de distúrbios do sono, aproximadamente 50% na população idosa. As mudanças fisiológicas, como no ritmo circadiano e na produção de melatonina, e as condições patológicas, como apneia obstrutiva do sono e insônia, influenciam adversamente. Intervenções personalizadas e políticas de saúde pública são necessárias para melhorar a qualidade do sono dos idosos, visando impactar positivamente a sua saúde geral. Conclusão: Destaca-se a necessidade urgente de abordagens específicas para melhorar a qualidade do sono nos idosos, visando promover um envelhecimento saudável e abordar a prevalência significativa de distúrbios do sono nesta população.
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- 2024
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6. Australian and Canadian financial wellbeing policy landscape during COVID-19: An equity-informed policy scan
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Ana Paula Belon, Aryati Yashadhana, Krystyna Kongats, Kayla Atkey, Nicole M. Glenn, Karla Jaques, Laura Nieuwendyk, Patrick Harris, Evelyne de Leeuw, and Candace I.J. Nykiforuk
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Poverty ,Financial stress ,COVID-19 ,Policy ,Government programs ,Equity ,Public aspects of medicine ,RA1-1270 - Abstract
Background: This targeted and comprehensive policy scan examined how different levels of governments in Australia and Canada responded to the financial crisis brought on by the COVID-19 pandemic. We mapped the types of early policy responses addressing financial strain and promoting financial wellbeing. We also examined their equity considerations. Methods: Through a systematic search, snowballing, and manual search, we identified Canadian and Australian policies at all government levels related to financial strain or financial wellbeing enacted or amended in 2019–2020. Using a deductive-inductive approach, policies were categorized by jurisdiction level, focal areas, and target population groups. Results: In total, 213 and 97 policies in Canada and Australia, respectively, were included. Comparisons between Canadian and Australian policies indicated a more diversified and equity-targeted policy landscape in Canada. In both countries, most policies focused on individual and family finances, followed by housing and employment areas. Conclusions: The policy scan identified gaps and missed opportunities in the early policies related to financial strain and financial wellbeing. While fast, temporary actions addressed individuals’ immediate needs, we recommend governments develop a longer-term action plan to tackle the root causes of financial strain and poor financial wellbeing for better health and non-health crisis preparedness. Statement on Ethics and Informed Consent: This research reported in this paper did not require ethical clearance or patient informed consent as the data sources were published policy documents. This study did not involve data collection with humans (or animals), nor any secondary datasets involving data provided by humans (or from animal studies).
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- 2024
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7. INFLUÊNCIA DA TEMPERATURA E DA PRECIPITAÇÃO NA VARIAÇÃO ANUAL DE ÍNDICES DE VEGETAÇÃO EM ÁREA DE FLORESTA ESTACIONAL SEMIDECIDUAL, NO SUDOESTE DO PARANÁ, BRASIL
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Fabiano André Marion, Juliano Andres, Elvis Rabuske Hendges, and Karine Belon
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NDVI - normalized difference vegetation index ,RENDVI - red edge normalized difference vegetation index ,EVI - enhanced vegetation index ,Sensoriamento remoto ,Satélite RapidEye ,Geography. Anthropology. Recreation ,Geography (General) ,G1-922 - Abstract
Os índices de vegetação (IVs) possuem como função realçar o sinal da vegetação e minimizar as variações na irradiância solar e os efeitos do substrato do dossel vegetal. As séries temporais de imagens de cobertura vegetal apresentam diferentes componentes de frequência, como variações sazonais e flutuações de longo e curto prazo, influenciados principalmente pelos fatores climáticos da temperatura e da precipitação. Assim, o trabalho visa avaliar a influência da temperatura e da precipitação na variação anual do NDVI (normalized difference vegetation index), do RENDVI (red edge normalized difference vegetation index) e do EVI (enhanced vegetation index), em área de floresta estacional semidecidual, a qual abrange parte dos municípios de Marmeleiro e de Renascença, no sudoeste do Estado do Paraná. Foram utilizadas sete imagens do satélite RapidEye (nível 3A) disponíveis para o ano de 2018 sem cobertura de nuvens. A variação sazonal demonstrou que os maiores valores de IVs da vegetação foram encontrados no verão, uma vez que a temperatura e a precipitação contribuem para elevá-los na área de estudo, sendo a resposta à temperatura mais rápida que à precipitação. O EVI apresentou melhor correlação com a temperatura média mínima e com a temperatura média, pelo fato de ser mais influenciado pelo índice de área foliar (IAF), que é controlado pelas estações do ano. Por outro lado, o NDVI e o RENDVI são mais influenciados pela precipitação e apresentaram maior correlação com a precipitação acumulada entre 30 e 60 dias anteriores ao imageamento.
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- 2024
8. Effective strategies for Fecal Immunochemical Tests (FIT) programs to improve colorectal cancer screening uptake among populations with limited access to the healthcare system: a rapid review
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Ana Paula Belon, Emily McKenzie, Gary Teare, Candace I. J. Nykiforuk, Laura Nieuwendyk, Minji (Olivia) Kim, Bernice Lee, and Kamala Adhikari
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Fecal immunochemical test (FIT) ,Colorectal cancer ,Cancer screening ,Cancer prevention ,Public health ,Health equity ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Colorectal cancer (CRC) is one of the leading causes of cancer death globally. CRC screening can reduce the incidence and mortality of CRC. However, socially disadvantaged groups may disproportionately benefit less from screening programs due to their limited access to healthcare. This poor access to healthcare services is further aggravated by intersecting, cumulative social factors associated with their sociocultural background and living conditions. This rapid review systematically reviewed and synthesized evidence on the effectiveness of Fecal Immunochemical Test (FIT) programs in increasing CRC screening in populations who do not have a regular healthcare provider or who have limited healthcare system access. Methods We used three databases: Ovid MEDLINE, Embase, and EBSCOhost CINAHL. We searched for systematic reviews, meta-analysis, and quantitative and mixed-methods studies focusing on effectiveness of FIT programs (request or receipt of FIT kit, completion rates of FIT screening, and participation rates in follow-up colonoscopy after FIT positive results). For evidence synthesis, deductive and inductive thematic analysis was conducted. The findings were also classified using the Cochrane Methods Equity PROGRESS-PLUS framework. The quality of the included studies was assessed. Results Findings from the 25 included primary studies were organized into three intervention design-focused themes. Delivery of culturally-tailored programs (e.g., use of language and interpretive services) were effective in increasing CRC screening. Regarding the method of delivery for FIT, specific strategies combined with mail-out programs (e.g., motivational screening letter) or in-person delivery (e.g., demonstration of FIT specimen collection procedure) enhanced the success of FIT programs. The follow-up reminder theme (e.g., spaced out and live reminders) were generally effective. Additionally, we found evidence of the social determinants of health affecting FIT uptake (e.g., place of residence, race/ethnicity/culture/language, gender and/or sex). Conclusions Findings from this rapid review suggest multicomponent interventions combined with tailored strategies addressing the diverse, unique needs and priorities of the population with no regular healthcare provider or limited access to the healthcare system may be more effective in increasing FIT screening. Decision-makers and practitioners should consider equity and social factors when developing resources and coordinating efforts in the delivery and implementation of FIT screening strategies.
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- 2024
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9. The Generative Mechanisms of Financial Strain and Financial Well-Being: A Critical Realist Analysis of Ideology and Difference
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Nicole M. Glenn, Aryati Yashadhana, Karla Jaques, Ana Belon, Evelyne de Leeuw, Candace I. J. Nykiforuk, and Patrick Harris
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critical realism ,financial well-being ,financial strain ,covid-19 ,inequities ,public health ,Public aspects of medicine ,RA1-1270 - Abstract
Background Rapid, strategic action is required to mitigate the negative and unequal impact of the coronavirus disease 2019 (COVID-19) pandemic on the financial well-being (FWB) of global populations. Personal financial strain (FS) worsened most significantly among systematically excluded groups. Targeted government- and community-led initiatives are needed to address these inequities. The purpose of this applied research was to identify what works for whom, under what conditions, and why in relation to community and government initiatives that promote personal and household FWB and/or address FS in high income economies. Methods We employed a critical realist analysis to literature that reported on FWB/FS initiatives in high income countries. This included initiatives introduced in response to the pandemic as well as those that began prior to the pandemic. We included sources based on a rapid review. We coded academic, published literature (n = 39) and practicebased (n = 36) reports abductively to uncover generative mechanisms – ie, underlying, foundational factors related to community or government initiatives that either constrained and/or enabled FWB and FS. Results We identified two generative mechanisms: (1) neoliberal ideology; and (2) social equity ideology. A third mechanism, social location (eg, characteristics of identity, location of residence), cut across the two ideologies and demonstrated for whom the initiatives worked (or did not) in what circumstances. Neoliberal ideology (ie, individual responsibility) dominated initiative designs, which limited the positive impact on FS. This was particularly true for people who occupied systematically excluded social locations (eg, low-income young mothers). Social equity-based initiatives were less common within the literature, yet mostly had a positive impact on FWB and produced equitable outcomes. Conclusion Equity-centric initiatives are required to improve FWB and reduce FS among systemically excluded and marginalized groups. These findings are of relevance now as nations strive for financial recovery in the face of the ongoing global pandemic.
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- 2023
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10. An action-oriented public health framework to reduce financial strain and promote financial wellbeing in high-income countries
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Nykiforuk, Candace I. J., Belon, Ana Paula, de Leeuw, Evelyne, Harris, Patrick, Allen-Scott, Lisa, Atkey, Kayla, Glenn, Nicole M., Hyshka, Elaine, Jaques, Karla, Kongats, Krystyna, Montesanti, Stephanie, Nieuwendyk, Laura M., Pabayo, Roman, Springett, Jane, and Yashadhana, Aryati
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- 2023
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11. Post-COVID-19 condition: systemic inflammation and low functional exercise capacity
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Gabriela Salim de Castro, Leonardo R. Gama, Alexandre Ferreira Ramos, Guilherme Gatti da Silva, Alexandre Abilio de Souza Teixeira, Edecio Cunha-Neto, Heraldo Possolo de Souza, Suely K. Marie, Leda L. Talib, Verônica Coelho, Jorge Kalil, Adriana Ladeira de Araujo, Ana Paula Ritto, Alessandro Rodrigo Belon, Amanda Soares Santos, Ana Paula Noronha Barrére, Márcio V. Y. Sawamura, Celina Almeida Lamas, Bruno Guedes Baldi, Carlos R. R. Carvalho, Leslie Domenici Kulikowski, Rodolfo Furlan Damiano, Marta Imamura, José Cesar Rosa Neto, Fabio S. Lira, José Pinhata Otoch, Euripedes Constantino Miguel, Linamara Battistella, Orestes V. Forlenza, Geraldo Busatto, and Marilia Seelaender
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COVID-19 ,post-COVID-19 condition ,post-acute sequelae of SARS-CoV-2 infection ,PASC ,long COVID ,inflammation ,Nutrition. Foods and food supply ,TX341-641 - Abstract
IntroductionPost-COVID-19 condition (PCC) is characterised by a plethora of symptoms, with fatigue appearing as the most frequently reported. The alterations that drive both the persistent and post-acute disease newly acquired symptoms are not yet fully described. Given the lack of robust knowledge regarding the mechanisms of PCC we have examined the impact of inflammation in PCC, by evaluating serum cytokine profile and its potential involvement in inducing the different symptoms reported.MethodsIn this cross-sectional study, we recruited 227 participants who were hospitalised with acute COVID-19 in 2020 and came back for a follow-up assessment 6–12 months after hospital discharge. The participants were enrolled in two symptomatic groups: Self-Reported Symptoms group (SR, n = 96), who did not present major organ lesions, yet reported several debilitating symptoms such as fatigue, muscle weakness, and persistent loss of sense of smell and taste; and the Self-Reported Symptoms and decreased Pulmonary Function group (SRPF, n = 54), composed by individuals with the same symptoms described by SR, plus diagnosed pulmonary lesions. A Control group (n = 77), with participants with minor complaints following acute COVID-19, was also included in the study. Serum cytokine levels, symptom questionnaires, physical performance tests and general clinical data were obtained in the follow-up assessment.ResultsSRPF presented lower IL-4 concentration compared with Control (q = 0.0018) and with SR (q = 0.030), and lower IFN-α2 serum content compared with Control (q = 0.007). In addition, SRPF presented higher MIP-1β serum concentration compared with SR (q = 0.029). SR presented lower CCL11 (q = 0.012 and q = 0.001, respectively) and MCP-1 levels (q = 0.052 for both) compared with Control and SRPF. SRPF presented lower G-CSF compared to Control (q = 0.014). Female participants in SR showed lower handgrip strength in relation to SRPF (q = 0.0082). Male participants in SR and SRPF needed more time to complete the timed up-and-go test, as compared with men in the Control group (q = 0.0302 and q = 0.0078, respectively). Our results indicate that different PCC symptom profiles are accompanied by distinct inflammatory markers in the circulation. Of particular concern are the lower muscle function findings, with likely long-lasting consequences for health and quality of life, found for both PCC phenotypes.
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- 2024
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12. Influence of the shape of RDX grains on the creation of hot spots by mesoscale modeling
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Belon, Steve, Erzar, Benjamin, Kaeshammer, Élodie, and Borne, Lionel
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Physics - Classical Physics - Abstract
CEA-Gramat studies the sensitivity of energetic materials to enhance their security and reliability. The conditions leading to the initiation of an explosive must be understood to control its sensitivity. According to the hot spots theory, the shock initiation of heterogeneous explosives is related to their microstructure: the shock interacts with the heterogeneities of the microstructure (pores and inclusions, morphology of grains and fragments, debonding, etc.) and creates local deposits of energy. To describe these hot spots, energetic materials have to be modeled at a scale allowing the discretization of their microstructure: the mesoscale. Micro-computed tomographies of energetic materials are done at CEA-Gramat and analyzed to build geometric models used in finite element simulations. Two kinds of models are studied:-Real models are directly built on the real microstructures extracted from micro-computed tomographies.-Virtual models are based on the same microstructures but simplified to study independently the effects of microstructural parameters (granulometry, porosity, filler content{\ldots}) on the creation of hot spots. Compositions based on different kind of RDX particles in an inert binder are studied through numerical simulation. The influence of particle shape on the inert shock response is investigated at the mesoscale. Local heterogeneities of pressure and temperature fields appear intimately related to the morphological properties of the microstructures. Particles with sharp edges create more hot spots than spherical particles.
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- 2020
13. Identifying Meaningful Indirect Indicators of Migration for Different Conflicts
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Singh, Lisa, Donato, Katharine, Arab, Ali, Belon, Tomas Alvarez, Fraifeld, Abraham, Fulmer, Sean, Post, Douglas, and Wang, Yanchen
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Computer Science - Computers and Society - Abstract
This extended abstract describes an ongoing project that attempts to blend publicly available organic, real time behavioral data, event data, and traditional migration data to determine when and where people will move during times of instability. We present a methodology that was successful for a case study predicting mass movement in Iraq from 2015 - 2017, and discuss how we are extending it to capture indirect indicators of movement in Venezuela., Comment: 3 pages ACM Humanitarian Workshop - KDD 2020
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- 2020
14. An action-oriented public health framework to reduce financial strain and promote financial wellbeing in high-income countries
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Candace I. J. Nykiforuk, Ana Paula Belon, Evelyne de Leeuw, Patrick Harris, Lisa Allen-Scott, Kayla Atkey, Nicole M. Glenn, Elaine Hyshka, Karla Jaques, Krystyna Kongats, Stephanie Montesanti, Laura M. Nieuwendyk, Roman Pabayo, Jane Springett, and Aryati Yashadhana
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Financial wellbeing ,Financial strain ,Social determinants of health ,Health equity ,Framework ,Intervention ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Perceived financial security impacts physical, mental, and social health and overall wellbeing at community and population levels. Public health action on this dynamic is even more critical now that the COVID-19 pandemic has exacerbated financial strain and reduced financial wellbeing. Yet, public health literature on this topic is limited. Initiatives targeting financial strain and financial wellbeing and their deterministic effects on equity in health and living conditions are missing. Our research-practice collaborative project addresses this gap in knowledge and intervention through an action-oriented public health framework for initiatives targeting financial strain and wellbeing. Methods The Framework was developed using a multi-step methodology that involved review of theoretical and empirical evidence alongside input from a panel of experts from Australia and Canada. In an integrated knowledge translation approach, academics (n = 14) and a diverse group of experts from government and non-profit sectors (n = 22) were engaged throughout the project via workshops, one-on-one dialogues, and questionnaires. Results The validated Framework provides organizations and governments with guidance for the design, implementation, and assessment of diverse financial wellbeing- and financial strain-related initiatives. It presents 17 priority actionable areas (i.e., entry points for action) likely to have long-lasting, positive effects on people’s financial circumstances, contributing to improved financial wellbeing and health. The 17 entry points relate to five domains: Government (All Levels), Organizational & Political Culture, Socioeconomic & Political Context, Social & Cultural Circumstances, and Life Circumstances. Conclusions The Framework reveals the intersectionality of root causes and consequences of financial strain and poor financial wellbeing, while also reinforcing the need for tailored actions to promote socioeconomic and health equity for all people. The dynamic, systemic interplay of the entry points illustrated in the Framework suggest opportunities for multi-sectoral, collaborative action across government and organizations towards systems change and the prevention of unintended negative impacts of initiatives.
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- 2023
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15. A rapid review of initiatives to address financial strain and wellbeing in high-income contexts
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Aryati Yashadhana, Nicole M Glenn, Karla Jaques, Ana Paula Belon, Patrick Harris, Evelyne de Leeuw, and Candace IJ Nykiforuk
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equity ,financial strain ,financial stress ,Public aspects of medicine ,RA1-1270 - Abstract
Introduction: The coronavirus disease 2019 (COVID-19) pandemic has exacerbated financial strain among populations worldwide. This is concerning, given the link between financial strain and health. There is little evidence to guide action in this area, particularly from a public health perspective. To address this gap, we examined initiatives to address financial wellbeing and financial strain in high-income contexts. Methods: We used rapid review methodology and applied an equity-focused lens in our analysis. We searched six databases (MEDLINE, PsycINFO, Web of Science, ProQuest, Informit, and Google Advanced) for peer-reviewed, academic and practice-based literature evaluating initiatives to address financial strain and wellbeing in high-income contexts published between 2015–2020. We conducted a relevancy and quality appraisal of included academic sources. We used EPPI-reviewer software to extract equity-related, descriptive data, and author-reported outcomes. Results: We conducted primary screening on a total of 4779 titles/abstracts (academic n = 4385, practice-based n = 394); of these, we reviewed 182 full text articles (academic n = 87, practice-based n = 95) to assess their relevancy and fit with our research question. A total of 107 sources were excluded based on our selection criteria and relevance to the research question (Figure 1), leaving 75 sources that were extracted for this review (academic n = 39, practice-based n = 36). These sources focused on initiatives predominantly based in Australia, the US, and Canada, with a smaller number from the UK and Europe. Most sources primarily targeted financial literacy and personal/family finances, followed by employment, housing, and education. Conclusions: We found that holistic initiatives (i.e., complex, wrap-around) that ensured people’s basic needs were met (for example, before building financial skills) were aligned with positive and equitable financial wellbeing and financial strain outcomes, as reported in the reviewed studies. We noted significant gaps in the literature related to equity, such as the impact of initiatives on socially excluded populations (e.g., Indigenous peoples, racialised peoples, and rural dwellers). More research using a public health lens is required to guide equitable and sustainable action in this area.
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- 2023
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16. Does Arterialization of Portal Vein Have Any Effects in Large-for-Size Liver Transplantation? Hemodynamic, Histological, and Biomolecular Experimental Studies
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Rafael Rodrigues Torres, Ana Cristina Aoun Tannuri, Suellen Serafini, Alessandro Belon, Josiane Oliveira Gonçalves, Celso di Loreto, and Uenis Tannuri
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large-for-size liver transplantation ,complications of liver transplantation ,liver transplantation ,pediatric liver transplantation ,animal model ,Surgery ,RD1-811 - Abstract
Background: In pediatric liver transplantation, the optimal size of the transplanted liver ranges between 0.8% and 4.0% of the recipient’s weight. Sometimes, the graft weight exceeds this upper limit, characterizing the large-for-size condition potentially associated with reduced blood flow and worsening of ischemia-reperfusion injury. Therefore, it would be beneficial to increase the portal flow through arterialization of the portal vein. Materials and methods: Fifteen pigs underwent large-for-size liver transplants. They were divided into two groups: control (CTRL 6 animals – conventional technique) and arterialization – a shunt was established between the portal vein and the splenic artery (ART 9 animals). Hemodynamic, biochemical, histological, and molecular variables were compared. Results: Arterialization resulted in a significant increase in portal vein pressure but no changes in other hemodynamic variables, as shown in the analysis of variance. It was observed lower ALT values (p = 0.007), with no differences regarding the values of blood pH and lactate (p = 0.54 and p = 0.699 respectively) or histological variables (edema, steatosis, inflammation, necrosis, and IRI – p = 1.0, p = 0.943, p = 0.174, p = 0.832, p = 0.662, respectively). The molecular studies showed significantly increased expression of IL6 after 3 hours of reperfusion (p = 0.048) and decreased expression of ICAM immediately after reperfusion (p = 0.03). The regression analysis suggested a positive influence of portal flow and pressure on biochemical parameters. Conclusion: Arterialization of the portal vein showed no histological, biochemical, or molecular benefits in large-for-size transplantation.
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- 2022
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17. Impact of Three Methods of Ischemic Preconditioning on Ischemia-Reperfusion Injury in a Pig Model of Liver Transplantation
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Alessandro Rodrigo Belon, Ana Cristina Aoun Tannuri, Daniel de Albuquerque Rangel Moreira, Jose Luiz Figueiredo, Alessandra Matheus da Silva, Suellen Serafini, Raimundo Renato Guimarães, Caroline Silverio Faria, Alcione Sanches de Alexandre, Josiane Oliveira Gonçalves, Vitor Ribeiro Paes, and Uenis Tannuri
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experimental surgery ,hepatobiliary surgery ,ischemia-reperfusion ,preconditioning ,surgical technique ,pediatric surgery ,Surgery ,RD1-811 - Abstract
Background Ischemic preconditioning (IPC), either direct (DIPC) or remote (RIPC), is a procedure aimed at reducing the harmful effects of ischemia-reperfusion (I/R) injury. Objectives To assess the local and systemic effects of DIPC, RIPC, and both combined, in the pig liver transplant model. Materials and methods Twenty-four pigs underwent orthotopic liver transplantation and were divided into 4 groups: control, direct donor preconditioning, indirect preconditioning at the recipient, and direct donor with indirect recipient preconditioning. The recorded parameters were: donor and recipient weight, graft-to-recipient weight ratio (GRWR), surgery time, warm and cold ischemia time, and intraoperative hemodynamic values. Blood samples were collected before native liver removal (BL) and at 0 h, 1 h, 3 h, 6 h, 12 h, 18 h, and 24 h post-reperfusion for the biochemical tests: aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), gamma-glutamyl transferase (GGT), creatinine, BUN (blood urea nitrogen), lactate, total and direct bilirubin. Histopathological examination of liver, gut, kidney, and lung fragments were performed, as well as molecular analyses for expression of the apoptosis-related BAX (pro-apoptotic) and Bcl-XL (anti-apoptotic) genes, eNOS (endothelial nitric oxide synthase) gene, and IL-6 gene related to inflammatory ischemia-reperfusion injury, using real-time polymerase chain reaction (RT-PCR). Results There were no differences between the groups regarding biochemical and histopathological parameters. We found a reduced ratio between the expression of the BAX gene and Bcl-XL in the livers of animals with IPC versus the control group. Conclusions DIPC, RIPC or a combination of both, produce beneficial effects at the molecular level without biochemical or histological changes.
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- 2022
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18. Covid long, des symptômes aux hypothèses moléculaires.
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Michiels, Yves and Belon, Jean-Paul
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Copyright of Actualités Pharmaceutiques is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2024
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19. Inflammatory markers assessment in an animal model of intracranial hypertension: a randomized trial
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Marcelo Prudente do Espírito Santo, Caroline Silvério Faria, Davi Jorge Fontoura Solla, Leonardo Zumerkorn Pipek, Alessandro Rodrigo Belon, Brasil Ping Jeng, Almir Ferreira de Andrade, Manoel Jacobsen Teixeira, and Wellingson Silva Paiva
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Inflammatory markers ,Intracranial hypertension ,Animal model ,Cytokines ,Inflammation ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Abstract Background Intracranial hypertension (ICH) is a common final pathway of most neurosurgical pathologies and leads to poor prognosis if not detected and treated properly. Inflammatory markers have been assessed in clinical scenarios of neurological injuries, in which systemic and brain tissue aggressions may introduce bias. There is a lack of studies under controlled settings to isolate the ICH effect on inflammation. This study aims to evaluate the effects of ICH on the serum concentration of cytokines as biomarkers of neuroinflammation in an experimental model which isolates ICH from potential confounding variables. Methods An established model of ICH using an intracerebral pediatric bladder catheter and a multisensor intraparenchymal catheter was used in adult pigs (Sus domesticus). The animals were randomly allocated to 2 groups based on the catheter balloon volume used to simulate the ICP increase (4 ml or 7 ml). Cytokines were measured in 4 timepoints during the experiment: (1) 15 min before balloon insufflation; (2) 5 min after insufflation; (3) 125 min after insufflation; (4) 60 min after deflation. The following cytokines were measured IL-1α; IL-1β; IL–1ra; IL-2; IL-4; IL-6; IL-8; IL-10; IL-12; IL-18; TNFα. Generalized estimating equations were modeled to compare the ICP and cytokines values between the groups along the experiment. The study sample size was powered to detect interactions between the groups and the study moments with an effect size (f) of at least 0.3. The ARRIVE checklist was followed. Results A total of 20 animals were studied (10 in each group, 4 ml or 7 ml balloon volume insufflation). The animal model was successful in increasing the ICP along the moments of the experiment (p
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- 2021
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20. ReNovRisk: a multidisciplinary programme to study the cyclonic risks in the South-West Indian Ocean
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Tulet, Pierre, Aunay, Bertrand, Barruol, Guilhem, Barthe, Christelle, Belon, Remi, Bielli, Soline, Bonnardot, François, Bousquet, Olivier, Cammas, Jean-Pierre, Cattiaux, Julien, Chauvin, Fabrice, Fontaine, Idriss, Fontaine, Fabrice R., Gabarrot, Franck, Garabedian, Sabine, Gonzalez, Alicia, Join, Jean-Lambert, Jouvenot, Florian, Nortes-Martinez, David, Mékiès, Dominique, Mouquet, Pascal, Payen, Guillaume, Pennober, Gwenaelle, Pianezze, Joris, Rault, Claire, Revillion, Christophe, Rindraharisaona, Elisa J., Samyn, Kevin, Thompson, Callum, and Vérèmes, Hélène
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- 2021
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21. Evaluation of cerebral hemodynamics by transcranial Doppler ultrasonography and its correlation with intracranial pressure in an animal model of intracranial hypertension
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Matheus Schmidt SOARES, Almir Ferreira de ANDRADE, Sérgio BRASIL, Marcelo DE-LIMA-OLIVEIRA, Alessandro Rodrigo BELON, Edson BOR-SENG-SHU, Ricardo de Carvalho NOGUEIRA, Daniel Agustin GODOY, and Wellingson Silva PAIVA
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Intracranial Pressure ,Intracranial Hypertension ,Ultrasonography, Doppler, Transcranial ,Models, Animal ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
ABSTRACT Background: Transcranial Doppler has been tested in the evaluation of cerebral hemodynamics as a non-invasive assessment of intracranial pressure (ICP), but there is controversy in the literature about its actual benefit and usefulness in this situation. Objective: To investigate cerebral blood flow assessed by Doppler technique and correlate with the variations of the ICP in the acute phase of intracranial hypertension in an animal model. Methods: An experimental animal model of intracranial hypertension was used. The experiment consisted of two groups of animals in which intracranial balloons were implanted and inflated with 4 mL (A) and 7 mL (B) for controlled simulation of different volumes of hematoma. The values of ICP and Doppler parameters (systolic [FVs], diastolic [FVd], and mean [FVm] cerebral blood flow velocities and pulsatility index [PI]) were collected during the entire procedure (before and during hematoma simulations and venous hypertonic saline infusion intervention). Comparisons between Doppler parameters and ICP monitoring were performed. Results: Twenty pigs were studied, 10 in group A and 10 in group B. A significant correlation between PI and ICP was obtained, especially shortly after abrupt elevation of ICP. There was no correlation between ICP and FVs, FVd or FVm separately. There was also no significant change in ICP after intravenous infusion of hypertonic saline solution. Conclusions: These results demonstrate the potential of PI as a parameter for the evaluation of patients with suspected ICP elevation.
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- 2022
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22. Inflammatory markers assessment in an animal model of intracranial hypertension: a randomized trial
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do Espírito Santo, Marcelo Prudente, Faria, Caroline Silvério, Solla, Davi Jorge Fontoura, Pipek, Leonardo Zumerkorn, Belon, Alessandro Rodrigo, Jeng, Brasil Ping, de Andrade, Almir Ferreira, Teixeira, Manoel Jacobsen, and Paiva, Wellingson Silva
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- 2021
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23. Behavioral mapping of children’s physical activities and social behaviors in an indoor preschool facility: methodological challenges in revealing the influence of space in play
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Ajoke R. Onojeghuo, Candace I. J. Nykiforuk, Ana Paula Belon, and Jane Hewes
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Free play ,GIS ,Social behaviors ,Gridding ,Indoor environments ,Physical activity ,Computer applications to medicine. Medical informatics ,R858-859.7 - Abstract
Abstract Background GIS (Geographic Information Systems) based behavior maps are useful for visualizing and analyzing how children utilize their play spaces. However, a GIS needs accurate locational information to ensure that observations are correctly represented on the layout maps of play spaces. The most commonly used tools for observing and coding free play among children in indoor play spaces require that locational data be collected alongside other play variables. There is a need for a practical, cost-effective approach for extending most tools for analyzing free play by adding geospatial locational information to children’s behavior data collected in indoor play environments. Results We provide a non-intrusive approach to adding locational information to behavior data acquired from video recordings of preschool children in their indoor play spaces. The gridding technique showed to be a cost-effective method of gathering locational information about children from video recordings of their indoor physical activities and social behaviors. Visualizing the proportions of categories and observed intervals was done using bubble pie charts which allowed for the merging of multiple categorical information on one map. The addition of locational information to other play activity and social behavior data presented the opportunity to assess what types of equipment or play areas may encourage different physical activities and social behaviors among preschool children. Conclusions Gridding is an effective method for providing locational data when analyzing physical activities and social behaviors of preschool children in indoor spaces. It is also reproducible for most GIS behavior mapping focusing on indoor environments. This bypasses the need to have positioning devices attached to children during observations, which can raise ethical considerations regarding children’s privacy and methodological implications with children playing less naturally. It also supports visualizations on behavior maps making them easier to interpret.
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- 2019
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24. Case Study: Creation of a Degree Program in Computer Security. White Paper.
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Belon, Barbara and Wright, Marie
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This paper reports on research into the field of computer security, and undergraduate degrees offered in that field. Research described in the paper reveals only one computer security program at the associate's degree level in the entire country. That program, at Texas State Technical College in Waco, is a 71-credit-hour program leading to an Associate of Applied Science in Network Technology degree and focuses heavily on computer networks and operating systems, containing courses that prepare individuals for careers on corporate security teams. The majority of computer security and information security training is offered in master's and doctoral-level programs. The paper proposes Norwalk Community College (NCC) in Norwalk, Connecticut, develop a new degree program at NCC. It also details the process of developing the degree program, starting with advisory committee members' development of a knowledge and skills list for entry-level computer security professionals, identification of the components that could be taught in a formal program of study, and the packaging of knowledge and skills components into logical course delivery units. The paper argues for development of similar programs at other community colleges. (NB)
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- 2002
25. The health equity measurement framework: a comprehensive model to measure social inequities in health
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Douglas C. Dover and Ana Paula Belon
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Health equity ,Inequities ,Healthcare ,Social determinants of health ,Public health surveillance ,Framework ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Despite the wealth of frameworks on social determinants of health (SDOH), two current limitations include the relative superficial description of factors affecting health and a lack of focus on measuring health equity. The Health Equity Measurement Framework (HEMF) addresses these gaps by providing a more encompassing view of the multitude of SDOH and drivers of health service utilisation and by guiding quantitative analysis for public health surveillance and policy development. The objective of this paper is to present the HEMF, which was specifically designed to measure the direct and indirect effects of SDOH to support improved statistical modelling and measurement of health equity. Methods Based on a framework synthesis, the HEMF development involved initially integrating theoretical components from existing SDOH and health system utilisation frameworks. To further develop the framework, relevant publications on SDOH and health equity were identified through a literature review in major electronic databases. White and grey literatures were critically reviewed to identify strengths and gaps in the existing frameworks in order to inform the development of a unique health equity measurement framework. Finally, over a two-year period of consultation, scholars, health practitioners, and local policy influencers from municipal and provincial governments provided critical feedback on the framework regarding its components and causal relationships. Results This unified framework includes the socioeconomic, cultural, and political context, health policy context, social stratification, social location, material and social circumstances, environment, biological factors, health-related behaviours and beliefs, stress, quality of care, and healthcare utilisation. Alongside the HEMF’s self-exploratory diagram showing the causal pathways in-depth, a number of examples are provided to illustrate the framework’s usefulness in measuring and monitoring health equity as well as informing policy-making. Conclusions The HEMF highlights intervention areas to be influenced by strategic public policy for any organisation whose purview has an effect on health, including helping non-health sectors (such as education and labour) to better understand how their policies influence population health and perceive their role in health equity promotion. The HEMF recognises the complexity surrounding the SDOH and provides a clear, overarching direction for empirical work on health equity.
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- 2019
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26. Mucociliary Clearance of Different Respiratory Conditions: A Clinical Study
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Juliana Souza Uzeloto, Dionei Ramos, Bruna Spolador de Alencar Silva, Mariana Belon Previatto de Lima, Rebeca Nunes Silva, Carlos Augusto Camillo, and Ercy Mara Cipulo Ramos
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mucociliary clearance ,saccharin ,chronic obstructive pulmonary disease ,smoking ,passive smoking ,Medicine ,Otorhinolaryngology ,RF1-547 - Abstract
Introduction Mucociliary clearance (MCC) is the first line of defense of the pulmonary system. Mucociliary clearance impairment may lead to increased risk of respiratory infections, lung injury, pulmonary repair problems, chronic dysfunctions and progression of respiratory diseases. Objective To characterize the MCC of active and passive smokers and individuals with chronic obstructive pulmonary disease (COPD) and compare the MCC behaviors between men and women of different age groups. Methods Patients with COPD (current smokers and ex-smokers) and apparently healthy individuals (current smokers, passive smokers and nonsmokers) were evaluated. All of the subjects underwent lung function and MCC evaluation (saccharin transport test [STT]). Smokers (with or without COPD) were questioned about the smoking history. Results A total of 418 individuals aged 16 to 82 years old, of both genders, were evaluated. The STT values of active and passive smokers were statistically higher than those of the control group (p
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- 2021
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27. Characterization of incineration residues from wastewater treatment plant in Polish city: a future waste based source of valuable elements?
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Kasina, Monika, Wendorff-Belon, Małgorzata, Kowalski, Piotr Rafał, and Michalik, Marek
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- 2019
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28. Daily use of extracorporeal CO2 removal in a critical care unit: indications and results
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Hadrien Winiszewski, François Aptel, François Belon, Nicolas Belin, Claire Chaignat, Cyrille Patry, Cecilia Clermont, Elise David, Jean-Christophe Navellou, Guylaine Labro, Gaël Piton, and Gilles Capellier
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Extracorporeal CO2 removal ,Acute respiratory distress syndrome ,Chronic obstructive pulmonary disease exacerbation ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Abstract Background While outcome improvement with extracorporeal CO2 removal (ECCO2R) is not demonstrated, a strong pathophysiological rational supports its use in the setting of acute respiratory distress syndrome (ARDS) and COPD exacerbation. We aimed to describe our single-center experience of ECCO2R indications and outcome. Methods Patients treated with ECCO2R in our medial ICU, from March 2014 to November 2017, were retrospectively enrolled. Primary end point was evolution of ventilator settings during the two first days following ECCO2R start. Results Thirty-three patients received ECCO2R. Seventeen were managed with Hemolung®, 10 with Prismalung®, 4 with ILA®, and 2 with Cardiohelp®. Indications for ECCO2R were mild or moderate ARDS (n = 16), COPD exacerbation (n = 11), or uncontrolled hypercapnia due to other causes (n = 6). Four patients were not intubated at the time of ECCO2R start. Median duration of ECCO2R treatment was 7 days [5–10]. In ARDS patients, between baseline and day 2, median tidal volume and driving pressure decreased from 5.3 [4.4–5.9] mL/kg and 10 [8–15] to 3.8 [3.3–4.1] mL/kg and 9 [8–11], respectively. Prone positioning was performed in 10 of the 16 patients, without serious adverse event. In COPD patients, between baseline and day 2, median ventilation minute and PaCO2 decreased significantly from respectively 7.6 [6.6–8.7] L/min and 9.4 [8.4–10.1] kPa to 5.8 [4.9–6.2] L/min and 6 [5.3–6.8] kPa. Four out of 11 COPD patients were extubated while on ECCO2R. Device thrombosis occurred in 5 patients (15%). Hemolysis was documented in 16 patients (48%). One patient died of intracranial hemorrhage, while on ECCO2R. Twenty-four patients were discharged from ICU alive. Twenty-eight day mortality was 31% in ARDS, 9% in COPD patients, and 50% in other causes of refractory hypercapnic respiratory failure. Conclusion ECCO2R was useful to apply ultra-protective ventilation among ARDS patients and improved PaCO2, pH, and minute ventilation in COPD patients.
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- 2018
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29. The importance of hospital dentistry: oral health status in hospitalized patients
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Cristhiane Olívia Ferreira do AMARAL, Letícia Marçal Ruthes BELON, Elza Aparecida da SILVA, Andressa de NADAI, Marcelo Sávio Paiva do AMARAL FILHO, and Fabiana Gouveia STRAIOTO
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Hospital dental team ,Dental care ,Oral Health. ,Dentistry ,RK1-715 - Abstract
Objective: This research study aimed to evaluate the oral health status and the need for dental treatment in hospitalized patients, analyzing the importance of dentistry in hospitals. Therefore, the goal of this research study was to evaluate the oral health status, the need for dental intervention and the patient’s opinion about the importance of having dental surgeons in hospital settings. Methods: 103 hospitalized patients were evaluated considering the DMFT index, gingival condition, visible biofilm index, and the need for invasive dental treatment. Volunteers were also asked about their opinion considering the importance of dentistry in hospital settings. Results: 68.9% of volunteers were male subjects and 31.1% female subjects. The mean DMFT was 17.9 and 96.1% of subjects had their oral hygiene kit with when came to hospital, 97.1% of subjects stated that the presence of dental surgeons is necessary in the hospital setting and 63.1% of subjects presented poor biofilm removal. The need for invasive dental treatment was as follows: restorations (68.9%), extractions (40.8%), endodontics (23.3%), dental pain (26.2%) and presence of abscess (7,8%). Conclusion: Oral health and hygiene status of patients were classified as poor and most of patients showed the need for invasive dental treatment. The majority of patients reported that dental care is very important in hospitals settings.
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- 2018
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30. Behavioral mapping of children’s physical activities and social behaviors in an indoor preschool facility: methodological challenges in revealing the influence of space in play
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Onojeghuo, Ajoke R., Nykiforuk, Candace I. J., Belon, Ana Paula, and Hewes, Jane
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- 2019
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31. Qualidade de vida de tabagistas e sua correlação com a carga tabagística
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Mariana Belon Previatto de Lima, Dionei Ramos, Ana Paula Coelho Figueira Freire, Juliana Souza Uzeloto, Berta Lúcia de Mendonça Silva, and Ercy Mara Cipulo Ramos
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Tabagismo ,Qualidade de Vida ,Transtornos Relacionados ao Uso de Substâncias ,Therapeutics. Pharmacology ,RM1-950 - Abstract
RESUMO O tabagismo é considerado uma doença crônica e uma das principais causas de mortes evitáveis no mundo. A qualidade de vida é uma importante medida de impacto na saúde e em sua relação com os níveis de dependência de nicotina e de carga tabagística, os quais ainda não estão totalmente esclarecidos. Avaliou-se a qualidade de vida de tabagistas e sua correlação com a carga tabagística e com o nível de dependência nicotínica. Foram inclusos, neste estudo, tabagistas de ambos os sexos e sem doenças clínicas diagnosticadas. Posteriormente, foi realizada avaliação da qualidade de vida e nível de dependência nicotínica por meio de questionários. A amostra foi constituída por 48 indivíduos. Houve correlação negativa entre a vitalidade e a quantidade de anos em que estes indivíduos fumaram (p=0,009; r=-0,27), assim como o estado geral de saúde e anos/maço (p=0,02; r=-0,23) e quantidade de cigarros consumidos por dia atualmente (p=0,006; r=-0,29). É possível observar correlação negativa entre capacidade funcional e a pontuação do questionário de Fagerström (p=0,004; r=-0,3). Concluiu-se que a carga tabagística e o grau de dependência de nicotina apresentaram relação com piores índices de qualidade de vida da população tabagista.
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- 2017
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32. Correction to: The health equity measurement framework: a comprehensive model to measure social inequities in health
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Dover, Douglas C. and Belon, Ana Paula
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- 2019
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33. The health equity measurement framework: a comprehensive model to measure social inequities in health
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Dover, Douglas C. and Belon, Ana Paula
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- 2019
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34. How perceptions of community environment influence health behaviours: using the Analysis Grid for Environments Linked to Obesity Framework as a mechanism for exploration
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L. M. Nieuwendyk, A. P. Belon, H. Vallianatos, K. D. Raine, D. Schopflocher, J. C. Spence, R. C. Plotnikoff, and C. I. Nykiforuk
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environment, photovoice, ANGELO Framework, physical activity, eating behaviour ,Medicine (General) ,R5-920 - Abstract
Introduction: Overweight and obesity are influenced by a complex interplay of individual and environmental factors that affect physical activity and healthy eating. Nevertheless, little has been reported on people's perceptions of those factors. Addressing this critical gap and community partner needs, this study explored how people perceived the influence of micro- and macroenvironmental factors on physical activity and healthy eating. Methods: Community partners wanted the study results in a format that would be readily and easily used by local decision makers. We used photovoice to engage 35 community members across four municipalities in Alberta, Canada, and to share their narratives about their physical activity and healthy eating. A combination of inductive and deductive analysis categorized data by environmental level (micro vs. macro) and type (physical, political, economic, and sociocultural), guided by the Analysis Grid for Environments Linked to Obesity Framework. Results: Participants conceptualized health-influencing factors more broadly than physical activity and healthy eating to include "community social health." Participants spoke most often about the influence of the microenvironment (n = 792 ANGELO Framework coding tallies) on their physical activity, healthy eating and community social health in comparison to the macroenvironment (n = 93). Photovoice results provided a visual narrative to community partners and decision makers about how people's ability to make healthy choices can be limited by macroenvironmental forces beyond their control. Conclusion: Focussing future research on macro- and microenvironmental influences and localized community social health can inform practice by providing strategies on how to implement healthy changes within communities, while ensuring that research and interventions echo diverse people's perceptions.
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- 2016
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35. Perceptions à l’égard de l’environnement et comportements en matière de santé : étude fondée sur le cadre ANGELO (grille d’analyse des environnements liés à l’obésité)
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L. M. Nieuwendyk, A. P. Belon, H. Vallianatos, K. D. Raine, D. Schopflocher, J. C. Spence, R. C. Plotnikoff, and C. I. Nykiforuk
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environnement, photovoix, cadre ANGELO, activité physique, habitudes alimentaires ,Medicine (General) ,R5-920 - Abstract
Introduction : Le surpoids et l’obésité dépendent de l’interaction complexe entre facteurs liés à l’indivu et facteurs liés à l’environnement ayant une influence sur l’activité physique et une alimentation saine. Il existe pourtant peu d’information sur les perceptions des individus à l’égard de ces facteurs. Afin de combler cette lacune importante et de répondre aux besoins de nos partenaires des collectivités, nous examinons comment les individus perçoivent l’influence des facteurs micro- et macroenvironnementaux sur leur activité physique et leur alimentation. Méthodologie : Nos partenaires des collectivités souhaitaient que les résultats de l’étude soient diffusés dans un format facile à utiliser par les décideurs locaux. Avec la méthode photovoix, nous avons motivé 35 membres issus de quatre collectivités de l’Alberta (Canada) à fournir leurs témoignages à propos de leur activité physique et d’une alimentation saine. Nous avons employé une combinaison d’analyses inductives et déductives pour classer les données par niveau (micro et macro) d’environnement et par type (environnement physique, politique, économique et socioculturel), à l’aide de la Grille d’analyse des environnements liés à l’obésité (ANGELO). Résultats : Pour les participants, les facteurs liés à la santé étaient plus larges que l’activité physique et une alimentation saine, incluant la « santé sociocommunautaire ». Les participants ont parlé plus souvent de l’influence du microenvironnement (score de 792 après codage au moyen du cadre ANGELO) sur l’activité physique, une alimentation saine ou la santé sociocommunautaire que sur l’influence du macroenvironnement (score de 93). Les résultats obtenus avec la méthode photovoix ont fourni aux partenaires des collectivités et aux décideurs un témoignage visuel de la manière dont la capacité des individus à faire des choix sains peut être restreinte par des forces macroenvironnementales qui échappent à leur contrôle. Conclusion : Axer les recherches ultérieures sur les influences macroenvironnementales et microenvironnementales ainsi que sur la santé sociocommunautaire locale sera utile, car cela alimentera les stratégies de changement en vue d’améliorer la santé des collectivités tout en garantissant que la recherche et les interventions font écho aux perceptions diverses de la population.
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- 2016
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36. Practical Geometric Modeling Using Geometric Algebra Motors
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Belon, Mauricio Cele Lopez and Hildenbrand, Dietmar
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- 2017
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37. Proceedings of Réanimation 2017, the French Intensive Care Society International Congress
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Bougouin, Wulfran, Marijon, Eloi, Planquette, Benjamin, Karam, Nicole, Dumas, Florence, Celermajer, David, Jost, Daniel, Lamhaut, Lionel, Beganton, Frankie, Cariou, Alain, Meyer, Guy, Jouven, Xavier, Bureau, Côme, Charpentier, Julien, Salem, Omar Ben Hadj, Guillemet, Lucie, Arnaout, Michel, Ferre, Alexis, Geri, Guillaume, Mongardon, Nicolas, Pène, Frédéric, Chiche, Jean-Daniel, Mira, Jean-Paul, Labro, Guylaine, Belon, François, Luu, Vinh-Phuc, Chenet, Julien, Besch, Guillaume, Puyraveau, Marc, Piton, Gaël, Capellier, Gilles, Martin, Maëlle, Lascarrou, Jean-Baptiste, Le Thuaut, Aurélie, Lacherade, Jean-Claude, Martin-Lefèvre, Laurent, Fiancette, Maud, Vinatier, Isabelle, Lebert, Christine, Bachoumas, Konstantinos, Yehia, Aihem, Henry-Laguarrigue, Matthieu, Colin, Gwenhaël, Reignier, Jean, Privat, Elodie, Escutnaire, Joséphine, Dumont, Cyrielle, Baert, Valentine, Vilhelm, Christian, Hubert, Hervé, Robert-Edan, Vincent, Lakhal, Karim, Quartin, Andrew, Hobbs, Brian, Cely, Cynthia, Bell, Cynthia, Pham, Tai, Schein, Roland, Geng, Yimin, Ng, Chaan, Ehrmann, Stephan, Gandonnière, Charlotte Salmon, Boisramé-Helms, Julie, Le Tilly, Olivier, De Bretagne, Isabelle Benz, Mercier, Emmanuelle, Mankikian, Julie, Bretagnol, Anne, Meziani, Ferhat, Halimi, Jean Michel, Le Guellec, Chantal Barin, Gaudry, Stéphane, Hajage, David, Tubach, Florence, Pons, Bertrand, Boulet, Eric, Boyer, Alexandre, Chevrel, Guillaume, Lerolle, Nicolas, Carpentier, Dorothée, de Prost, Nicolas, Lautrette, Alexandre, Mayaux, Julien, Nseir, Saad, Ricard, Jean-Damien, Dreyfuss, Didier, Robert, René, Garzotto, Franscesco, Kipnis, Eric, Tetta, Ciro, Ronco, Claudio, Schnell, David, Aurelie, Bourmaud, Reynaud, Marie, Clec’h, Christophe, Benyamina, Mourad, Vincent, François, Mariat, Christophe, Bornstain, Caroline, Rouleau, Stephane, Leroy, Christophe, Cohen, Yves, Morel, Jerome, Legrand, Matthieu, Terreaux, Jeremy, Darmon, Michaël, Cantier, Marie, Morisot, Adeline, Guérot, Emmanuel, Canet, Emmanuel, De Montmollin, Etienne, Voiriot, Guillaume, Neuville, Mathilde, Timsit, Jean-François, Sonneville, Romain, Fayssoil, Abdallah, Stojkovic, Tania, Behin, Anthony, Ogna, Adam, Lofaso, Frédéric, Laforet, Pascal, Wahbi, Karim, Prigent, Helene, Duboc, Denis, Orlikowski, David, Eymard, Bruno, Annane, Djillali, Le Guennec, Loic, Cholet, Clémentine, Bréchot, Nicolas, Hekimian, Guillaume, Besset, Sébastien, Lebreton, Guillaume, Nieszkowska, Ania, Trouillet, Jean Louis, Leprince, Pascal, Combes, Alain, Luyt, Charles-Edouard, Griton, Marion, Sesay, Musa, De Panthou, Nadia Sibaï, Bienvenu, Thomas, Biais, Matthieu, Nouette-Gaulain, Karine, Fossat, Guillaume, Baudin, Florian, Coulanges, Cécile, Bobet, Sabrine, Dupont, Arnaud, Courtes, Léa, Benzekri, Dalila, Kamel, Toufik, Muller, Grégoire, Bercault, Nicolas, Barbier, François, Runge, Isabelle, Skarzynski, Marie, Mathonnet, Armelle, Boulain, Thierry, Jouan, Youenn, Teixera, Noémie, Hassen-Khodja, Claire, Guillon, Antoine, Gaborit, Christophe, Grammatico-Guillon, Leslie, Rebière, Cécile, Azoulay, Elie, Misset, Benoit, Ruckly, Stephane, Garrouste-Orgeas, Maïté, Kentish-Barnes, Nancy, Duranteau, Jacques, Thuong, Marie, Joseph, Liliane, Renault, Anne, Lesieur, Olivier, Larbi, Anne-Gaelle Si, Viquesnel, Gérald, Zuber, Benjamin, Marque, Sophie, Kandelman, Stanislas, Pichon, Nicolas, Floccard, Bernard, Galon, Marion, Chevret, Sylvie, Kentish-Barnes, Nancy, Seegers, Valérie, Legriel, Stéphane, Jaber, Samir, Lefrant, Jean Yves, Reuter, Danielle, Guisset, Olivier, Cracco, Christophe, Seguin, Amélie, Durand-Gasselin, Jacques, Thirion, Marine, Cohen-Solal, Zoé, Foulgoc, Hélène, Rogier, Julien, Delobbe, Elsa, Schortgen, Frédérique, Asfar, Pierre, Julie, Boisramé-Helms, Grimaldi, David, Fabien, Grelon, Anguel, Nadia, Sigismond, Lasocki, Matthieu, Henry-Lagarrigue, Gonzalez, Frédéric, François, Legay, Guitton, Christophe, Schenck, Maleka, Jean-Marc, Doise, Radermacher, Peter, Kentish-Barnes, Nancy, Makunza, Joseph Nsiala, Nathalie, Mejeni Kamdem, Pierre, 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K., Chlilek, A., Hajji, Ahmed, Louati, Assaad, Khaldi, Ammar, Borgi, Aida, Ghali, Nargess, Bouziri, Asma, Menif, Khaled, Ben, Jaballah Najla, Armel, Anwar, Brochon, Jeanne, Dumitrescu, Mihaela, Thévenot, Sarah, Saulnier, Jean-Pascal, Husseini, Khaled, Laland, Catherine, Cremniter, Julie, Bousseau, Anne, Castel, Olivier, Brémaud-Csizmadia, Cassandra, Diss, Margot, Portefaix, Aurélie, Berthiller, Julien, Gillet, Yves, Aoul, Nabil Tabet, Douah, Ali, Addou, Zakaria, Youbi, Houari, Moussati, Mohamed, Belhabiche, Kamel, Mir, Souad, Abada, Sanaa, Amel, Zerhouni, Aouffen, Nabil, Bouzit, Zina, Grati, Ahmed H., Dhonneur, Gilles F., Boussarsar, Mohamed, Lau, Nicolas, Mezhari, Ilham, Roucaud, Nicolas, Le Meur, Matthieu, Paulet, Rémi, Coudray, Jean-Michel, Ghomari, Wahiba Imène, Boumlik, Reda, Peigne, Vincent, Daban, Jean-Louis, Boutonnet, Mathieu, Lenoir, Bernard, Yassine, Hafiani, Mohamed, Cheikh Chaigar, Khalid, Allali, Ihssan, Moussaid, Said, Elyoussoufi, Said, Salmi, Jazia, Amira Ben, Fatima, 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Andrejak, Claire, Ricome, Sylvie, Dupont, Hervé, Baudin, François, Dureau, Pauline, Tanguy, Audrey, Arbelot, Charlotte, Ben, Hassen Kais, Charfeddine, Ahmed, Granger, Benjamin, Laporte, Lucile, Hermetet, Coralie, Regaieg, Kais, Khemakhem, Rim, Chelly, Hedi, Cheikh, Chaigar Mohammed, Mountij, Hamid, Rghioui, Kawtar, Haddad, Wafae, Cherkab, Rachid, Barrou, Houcine, Naima, Aitmouden, bennani, Othmani M., Regaieg, Kais, Douib, Ahmed, Samet, Amal, Cungi, Pierre-Julien, Nguyen, Cédric, Cotte, Jean, D’aranda, Erwan, Meaudre, Eric, Avaro, Jean-Phillipe, Slaoui, Mohamed Taoufik, Mokline, Amel, Rahmani, Imene, Laajili, Achraf, Amri, Helmi, Gharsallah, Lazheri, Gasri, Bahija, Tlaili, Sofiene, Hammouda, Rym, Messadi, Amen Allah, Sudden Death Expertise Center, AKIKI Study Group, DO-RE-MI-FA Group, ENCEPHALITICA Study Group, for the HYPER2S Investigators and REVA Research Network, for the Purpura Fulminans Study Group, GFRUP RMEF, REVA ECMOnet, REA-RAISIN Study Group, for the EurêClark Study Group, and Groupe Communication et Simulation en Pédiatrie
- Published
- 2017
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38. Manufacturing of Large Size and Highly Transparent Nd:YAG Ceramics by Pressure Slip-Casting and Post-Sintering by HIP: An Experimental and Simulation Study
- Author
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Rémy Boulesteix, Cyril Chevarin, Rémy Belon, Alexandre Maître, Léo Cochain, and Christian Sallé
- Subjects
Nd:YAG ,pressure slip-casting ,simulation ,laser ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
This study reports the fabrication of Nd:YAG (i.e., Neodymium-doped Yttrium Aluminum Garnet: Y3-xNdxAl5O12) transparent ceramics of a large size by the pressure slip-casting forming technique. Colloidal suspensions of primary oxides (i.e., Y2O3, Al2O3, Nd2O3, and SiO2 used as sintering aid) were cast under pressure through a porous membrane. Cakes with a good microstructural homogeneity and mean pore diameter of 90 nm were obtained. Modeling of the pressure slip-casting process at the millimetric to centimetric scale based on a computational fluid dynamics simulation showed good agreement with experimental results in terms of the casting kinetics (i.e., cake thickness and fluid flow as a function of time) and cake permeability. As a result, it was possible to better manage pressure casting parameters in order to obtain large size and homogeneous green parts. Finally, transparent Nd:YAG ceramics sintered by vacuum sintering, followed by post-sintering treatment by Hot Isostatic Pressing (HIP), demonstrated laser slope efficiency (51.7%) and optical-to-optical efficiency (44%) with 130 mJ of output laser energy at 1064 nm equivalent to commercial single crystals.
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- 2020
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39. Predictive factors of bleeding events in adults undergoing extracorporeal membrane oxygenation
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Aubron, Cécile, DePuydt, Joris, Belon, François, Bailey, Michael, Schmidt, Matthieu, Sheldrake, Jayne, Murphy, Deirdre, Scheinkestel, Carlos, Cooper, D Jamie, Capellier, Gilles, Pellegrino, Vincent, Pilcher, David, and McQuilten, Zoe
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- 2016
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40. The Effects of Induction and Treatment of Intracranial Hypertension on Cerebral Autoregulation: An Experimental Study
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Marcelo de Lima Oliveira, Angela Macedo Salinet, Ricardo de Carvalho Nogueira, Alessandro Rodrigo Belon, Wellingson Silva Paiva, Brasil Chian Ping Jeng, Manoel Jacobsen Teixeira, and Edson Bor-Seng-Shu
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Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Background. This study aimed to analyse cerebral autoregulation (CA) during induction and treatment of intracranial hypertension (ICH) in an experimental model. Materials and Methods. Landrace and Duroc piglets were divided into mild and severe ICH groups. Four or seven millilitres of saline solution was infused into paediatric bladder catheter inserted in the parietal lobe (balloon inflation). After 1.5 h, a 3% saline solution was infused via venous catheter, and 30 min later, the bladder catheter balloon was deflated (surgery). The cerebral static autoregulation (sCA) index was evaluated using cerebral blood flow velocities (CBFV) obtained with Doppler ultrasound. Results. Balloon inflation increased ICP in both groups. The severe ICH group showed significantly lower sCA index values (p=0.001, ANOVA) after balloon inflation (ICH induction) and a higher sCA index after saline injection (p=0.02) and after surgery (p=0.04). ICP and the sCA index were inversely correlated (r=−0.68 and p
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- 2018
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41. Correction to: The health equity measurement framework: a comprehensive model to measure social inequities in health
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Douglas C. Dover and Ana Paula Belon
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Public aspects of medicine ,RA1-1270 - Published
- 2019
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42. Effects of ischemic preconditioning in a pig model of large-for-size liver transplantation
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Antonio José Gonçalves Leal, Ana Cristina Aoun Tannuri, Alessandro Rodrigo Belon, Raimundo Renato Nunes Guimarães, Maria Cecília Mendonça Coelho, Josiane de Oliveira Gonçalves, Suellen Serafini, Evandro Sobroza de Melo, and Uenis Tannuri
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Liver Transplantation ,Models ,Animal ,Reperfusion ,Apoptosis ,Ischemic Preconditioning ,Medicine (General) ,R5-920 - Abstract
OBJECTIVE: In most cases of pediatric liver transplantation, the clinical scenario of large-for-size transplants can lead to hepatic dysfunction and a decreased blood supply to the liver graft. The objective of the present experimental investigation was to evaluate the effects of ischemic preconditioning on this clinical entity. METHODS: Eighteen pigs were divided into three groups and underwent liver transplantation: a control group, in which the weights of the donors were similar to those of the recipients, a large-for-size group, and a large-for-size + ischemic preconditioning group. Blood samples were collected from the recipients to evaluate the pH and the sodium, potassium, aspartate aminotransferase and alanine aminotransferase levels. In addition, hepatic tissue was sampled from the recipients for histological evaluation, immunohistochemical analyses to detect hepatocyte apoptosis and proliferation and molecular analyses to evaluate the gene expression of Bax (pro-apoptotic), Bcl-XL (anti-apoptotic), c-Fos and c-Jun (immediate-early genes), ischemia-reperfusion-related inflammatory cytokines (IL-1, TNF-alpha and IL-6, which is also a stimulator of hepatocyte regeneration), intracellular adhesion molecule, endothelial nitric oxide synthase (a mediator of the protective effect of ischemic preconditioning) and TGF-beta (a pro-fibrogenic cytokine). RESULTS: All animals developed acidosis. At 1 hour and 3 hours after reperfusion, the animals in the large-for-size and large-for-size + ischemic preconditioning groups had decreased serum levels of Na and increased serum levels of K and aspartate aminotransferase compared with the control group. The molecular analysis revealed higher expression of the Bax, TNF-alpha, I-CAM and TGF-beta genes in the large-for-size group compared with the control and large-for-size + ischemic preconditioning groups. Ischemic preconditioning was responsible for an increase in c-Fos, IL-1, IL-6 and e-NOS gene expression. CONCLUSION: Ischemia-reperfusion injury in this model of large-for-size liver transplantation could be partially attenuated by ischemic preconditioning.
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- 2015
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43. Considerações sobre o modelo experimental de hipertensão intracraniana e avaliação do sistema de microchip para monitoração de pressão epidural
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Wellingson Silva Paiva, Almir Ferreira de Andrade, Alessandro Rodrigo Belon, Edson Bor-Seng-Shu, Marcelo de Lima Oliveira, Robson Luis Amorim, Matheus Schmidt Soares, Jose Pinhata Otoch, and Manoel Jacobsen Teixeira
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hipertensão intracraniana ,pressão intracraniana ,espaço epidural ,modelos animais ,hemorragia cerebral ,Medicine ,Surgery ,RD1-811 - Abstract
Objetivo: Neste trabalho temos o objetivo de avaliar a acurácia do sistema de aferição da pressão intracraniana (PIC) epidural com microchip. Métodos: Foram estudados 27 suínos sob anestesia geraI, devidamente assistidos com monitoração ventilatória e hemodinâmica. Durante o experimento foi reproduzido um processo expansivo intracerebral programado no lobo frontal direito. O experimento constou de três grupos (A, B e C) com hipertensão intracraniana gerada com balão reproduzindo um hematoma intracerebral. Em todos os grupos foram calibrados os parâmetros normais: os dois sistemas de PIC foram comparados e estudados quanto à correlação dos valores aferidos. Resultados: O comportamento médio da PIC ao longo dos momentos de avaliação foi estatisticamente diferente entre os grupos (p < 0,001). A reprodução de ressangramento resultou em elevação significativa da PIC (p < 0,001). Avaliando-se a acurácia comparativa geral, verificou-se um coeficiente de correlação intraclasse de 0,8. Conclusão: O modelo de hipertensão intracraniana por balão em suínos é factível e confiável na geração de hipertensão intracraniana. O sistema de aferição de pressão intracraniana epidural apresenta elevado coeficiente de correlação com o sistema de aferição parenquimatoso na avaliação global.
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- 2014
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44. Pentoxifylline associated to hypertonic saline solution attenuates inflammatory process and apoptosis after intestinal ischemia/reperfusion in rats
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Geraldo Magela Nogueira Marques, Roberto Rasslan, Alessandro Rodrigo Belon, Juliana Gonçalves Carvalho, Raphael Felice Neto, Samir Rasslan, Edivaldo Massazo Utiyama, and Edna Frasson de Souza Montero
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Reperfusion ,Ischemia ,Saline Solution, Hypertonic ,Pentoxifylline ,Apoptosis ,Inflammation ,Rats ,Surgery ,RD1-811 - Abstract
PURPOSE: To evaluate intestinal inflammatory and apoptotic processes after intestinal ischemia/reperfusion injury, modulated by pentoxifylline and hypertonic saline.METHODS:It was allocated into four groups (n=6), 24 male Wistar rats (200 to 250g) and submitted to intestinal ischemia for 40 min and reperfusion for 80 min: IR (did not receive any treatment); HS group (Hypertonic Saline, 4ml/kg-IV); PTX group (Pentoxifylline, 30mg/kg-IV); HS+PTX group (Hypertonic Saline and Pentoxifylline). All animals were heparinized (100U/kg). At the end of reperfusion, ileal fragments were removed and stained on hematoxylin-eosin and histochemical studies for COX-2, Bcl-2 and cleaved caspase-3.RESULTS:The values of sO2were higher on treated groups at 40 minutes of reperfusion (p=0.0081) and 80 minutes of reperfusion (p=0.0072). Serum lactate values were lower on treated groups after 40 minutes of reperfusion (p=0.0003) and 80 minutes of reperfusion (p=0.0098). Morphologic tissue injuries showed higher grades on IR group versus other groups: HS (p=0.0006), PTX (p=0.0433) and HS+PTX (p=0.0040). The histochemical study showed lesser expression of COX-2 (p=0.0015) and Bcl-2 (p=0.0012) on HS+PTX group. A lower expression of cleaved caspase-3 was demonstrated in PTX (p=0.0090; PTXvsIR).CONCLUSION:The combined use of pentoxifylline and hypertonic saline offers best results on inflammatory and apoptotic inhibitory aspects after intestinal ischemia/reperfusion.
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- 2014
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45. Daily use of extracorporeal CO2 removal in a critical care unit: indications and results
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Winiszewski, Hadrien, Aptel, François, Belon, François, Belin, Nicolas, Chaignat, Claire, Patry, Cyrille, Clermont, Cecilia, David, Elise, Navellou, Jean-Christophe, Labro, Guylaine, Piton, Gaël, and Capellier, Gilles
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- 2018
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46. Intracellular phase for an extracellular bacterial pathogen: MgtC shows the way
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Audrey Bernut, Claudine Belon, Chantal Soscia, Sophie Bleves, and Anne-Béatrice Blanc-Potard
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Pseudomonas aeruginosa ,MgtC ,macrophage ,magnesium ,biofilm ,zebrafish ,Biology (General) ,QH301-705.5 - Abstract
Pseudomonas aeruginosa is an extracellular pathogen known to impair host phagocytic functions. However, our recent results identify MgtC as a novel actor in P. aeruginosa virulence, which plays a role in an intramacrophage phase of this pathogen. In agreement with its intracellular function, P. aeruginosa mgtC gene expression is strongly induced when the bacteria reside within macrophages. MgtC was previously known as a horizontally-acquired virulence factor important for multiplication inside macrophages in several intracellular bacterial pathogens. MgtC thus provides a singular example of a virulence determinant that subverts macrophages both in intracellular and extracellular pathogens. Moreover, we demonstrate that P. aeru-ginosa MgtC is required for optimal growth in Mg2+ deprived medium, a property shared by MgtC factors from intracellular pathogens and, under Mg2+ limitation, P. aeruginosaMgtC prevents biofilm formation. We propose that MgtC has a similar function in intracellular and extracellular pathogens, which contributes to macrophage resistance and fine-tune adaptation to the host in relation to the different bacterial lifestyles. MgtC thus appears as an attractive target for antivirulence strategies and our work provides a natural peptide as MgtC antagonist, which paves the way for the development of MgtC inhibitors.
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- 2015
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47. Experimental model of intracranial hypertension with continuous multiparametric monitoring in swine
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Almir Ferreira de Andrade, Matheus Schmidt Soares, Gustavo Cartaxo Patriota, Alessandro Rodrigo Belon, Wellingson Silva Paiva, Edson Bor-Seng-Shu, Marcelo de Lima Oliveira, Clarissa Nobrega Nascimento, Gustavo Sousa Noleto, Aderaldo Costa Alves Junior, Eberval Gadelha Figueiredo, Jose Pinhata Otoch, and Manoel Jacobsen Teixeira
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pressao intracraniana ,ultrassonografia ,doppler transcraniana ,modelos experimentais ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Objective Intracranial hypertension (IH) develops in approximately 50% of all patients with severe traumatic brain injury (TBI). Therefore, it is very important to identify a suitable animal model to study and understand the pathophysiology of refractory IH to develop effective treatments. Methods We describe a new experimental porcine model designed to simulate expansive brain hematoma causing IH. Under anesthesia, IH was simulated with a balloon insufflation. The IH variables were measured with intracranial pressure (ICP) parenchymal monitoring, epidural, cerebral oximetry, and transcranial Doppler (TCD). Results None of the animals died during the experiment. The ICP epidural showed a slower rise compared with parenchymal ICP. We found a correlation between ICP and cerebral oximetry. Conclusion The model described here seems useful to understand some of the pathophysiological characteristics of acute IH.
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- 2013
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48. Possibilities and challenges for physical and social environment research in Brazil: a systematic literature review on health behaviors
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Ana Paula Belon and Candace Nykiforuk
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Medio Ambiente y Salud Pública ,Conductas Saludables ,Obesidad ,Revisión ,Medicine ,Public aspects of medicine ,RA1-1270 - Abstract
This systematic review analyzed articles focused on the relationship between environment (physical, built, perceived, and social) and smoking, alcohol drinking, physical activity, diet, and obesity in Brazil. Studies published between 19952011 were retrieved from seven databases and hand searches. Based on the 42 articles reviewed, gaps were identified and recommendations were made for future research. Despite a growing number of studies, the Brazilian literature is still limited. The increase of articles in 2010-2011 coincided with the diversification of lifestyles studied, although physical activity domain remains predominant. Most studies analyzed neighborhood settings and used subjective measures for lifestyle and for environment. The presence of recreational facilities was the main physical environment aspect studied, while safety from crime was the prominent social environment factor. More research is needed to yield a rich body of evidence that leads to theoretical and methodological advances, and that supports interventions aimed at creating healthy environments.
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- 2013
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49. A simplified experimental model of large-for-size liver transplantation in pigs
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Antonio Jose Goncalves Leal, Ana Cristina Aoun Tannuri, Alessandro Rodrigo Belon, Raimundo Renato Nunes Guimaraes, Maria Cecilia Mendonca Coelho, Josiane de Oliveira Goncalves, Suellen Serafini Sokol, Evandro Sobroza De Melo, Jose Pinhata Otoch, and Uenis Tannuri
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Experimental Orthotopic Liver Transplantation ,Large-For-Size Liver Transplantation ,Supraceliac Aortic Liver Transplantation ,Anhepatic Phase ,Medicine (General) ,R5-920 - Abstract
OBJECTIVE: The ideal ratio between liver graft mass and recipient body weight for liver transplantation in small infants is unknown; however, if this ratio is over 4%, a condition called large-for-size may occur. Experimental models of large-for-size liver transplants have not been described in the literature. In addition, orthotopic liver transplantation is marked by high morbidity and mortality rates in animals due to the clamping of the venous splanchnic system. Therefore, the objective of this study was to create a porcine model of large-for-size liver transplantation with clamping of the supraceliac aorta during the anhepatic phase as an alternative to venovenous bypass. METHOD: Fourteen pigs underwent liver transplantation with whole-liver grafts without venovenous bypass and were divided into two experimental groups: the control group, in which the weights of the donors were similar to the weights of the recipients; and the large-for-size group, in which the weights of the donors were nearly 2 times the weights of the recipients. Hemodynamic data, the results of serum biochemical analyses and histological examination of the transplanted livers were collected. RESULTS: The mortality rate in both groups was 16.5% (1/7). The animals in the large-for-size group had increased serum levels of potassium, sodium, aspartate aminotransferase and alanine aminotransferase after graft reperfusion. The histological analyses revealed that there were no significant differences between the groups. CONCLUSION: This transplant method is a feasible experimental model of large-for-size liver transplantation.
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- 2013
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50. Interest of submucosal dissection knife for endoscopic treatment of Zenker’s diverticulum
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Laquière, A., Grandval, P., Arpurt, J. P., Boulant, J., Belon, S., Aboukheir, S., Laugier, R., Penaranda, G., Curel, L., and Boustière, C.
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- 2015
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