Clinical and microbiological assessment in a subpopulation of young Argentine patients with severe periodontitis.

Aggressive periodontitis (AP) is the most serious entity of periodontal disease (stage III/IV, grade C periodontitis according to the latest classification, 2017). Aim: to enhance knowledge of periodontal microbiota in AP in native Argentine patients and describe the effect of a combined pharmacologicalmechanical periodontal treatment on clinical and microbiological parameters. Materials and Method: The study analyzed 42 periodontal sites in 11 patients diagnosed with AP. Clinical periodontal parameters were recorded at baseline, 45, 90 and 180 days. Microbiological samples were taken before treatment and at 180 days. PCR was used to determine presence of the periodontopathic bacteria Aggregatibacter actinomycetemcomitans (Aa), Porphyromonas gingivalis (Pg), Tannerella forsythia (Tf), Treponema denticola (Td), Prevotella intermedia (Pi) and Fusobacterium nucleatum (Fn). Patients underwent periodontal therapy including antibiotics (Amoxicillin 500mg + Metronidazole 250mg; 8hs/7 days), and were reevaluated at 45, 90 and 180 days. Results: Mean age was 28.4 ± 7.9 years. The initial PCR detected the following frequencies: Aa 14.3%, Pi 61.9%, Pg 71.4%, Tf 81.0%, Fn 95.2% and Td 97.6%. Baseline microbiological samples revealed significantly higher prevalence of Pg over Aa (p=0.012). Clinical parameters improved significantly after treatment (73.8% PS<5 mm; PS, NIC, SS p<0.001). At 180 days, a significant decrease in microbiological detection rates was observed (Fn, Td, Tf, Pi, Aa p<0.05). Aa was no longer detectable while Pg did not decrease significantly (p=0.052). Fn was the only study species detected in 100% (n=11:42) of residual pockets (PS≥5 mm) (p=0.053). Conclusion: In the initial samples, there was significant prevalence of Pg over Aa. Significant clinical improvement was achieved after the mechanical-pharmacological treatment, with undetectable levels of Aa, while Fn persisted in residual pockets, and Pg was present at most of the treated sites.

La periodontitis agresiva (PA) es la entidad más grave de la enfermedad periodontal (clasificación 2017: periodontitis estadio III/IV, grado C). Objetivo: mejorar el conocimiento sobre la microbiota periodontal de la PA en sujetos nativos argentinos y describir el efecto de un tratamiento mecánicofarmacológico periodontal sobre los parámetros clínicos y microbiológicos. Materiales y Método: se estudiaron 42 sitios periodontales correspondientes a 11 pacientes con PA. Los parámetros clínicos se registraron a 0, 45, 90 y 180 días. Las tomas microbiológicas se realizaron antes de iniciar el tratamiento y a los 180 días. La determinación de especies periodontopáticas (Aggregatibacter actinomycetemcomitans (Aa), Porphyromonas gingivalis (Pg), Tannerella forsythia (Tf), Treponema denticola (Td), Prevotella intermedia (Pi) y Fusobacterium nucleatum (Fn)) se realizó por PCR. Los pacientes iniciaron terapia básica periodontal junto con antibioticoterapia (Amoxicilina 500 mg + Metronidazol 250 mg; 8 hs/7 días) y fueron evaluados a los 45, 90 y 180 días. Resultados: la edad media fue 28,4 ± 7,9 años. Las detecciones iniciales fueron: Aa 14,3%, Pi 61,9%, Pg 71,4%, Tf 81,0%, Fn 95,2% y Td 97,6%. En las muestras iniciales la prevalencia de Pg sobre Aa fue significativamente superior (p=0,012). Los pacientes tuvieron una respuesta clínica favorable al tratamiento (73,8% PS<5 mm; PS, NIC, SS p<0,001). A 180 días, se observó una disminución estadísticamente significativa en la detección microbiana (Fn, Td, Tf, Pi, Aa p<0,05). En igual plazo, Aa no fue detectado, mientras que Pg mostró una disminución no significativa (p=0,052). Fn fue el único detectado en el 100% (n=11:42) de las bolsas periodontales residuales (PS≥5 mm) (p=0,053). Conclusión: Las muestras iniciales evidenciaron prevalencia significativa de Pg sobre Aa. El tratamiento logró una significativa mejora clínica con niveles indetectables de Aa. La persistencia de Fn en las bolsas residuales y de Pg en la mayoría de los sitios tratados, caracterizaron la muestra poblacional estudiada

Clinical and microbiological assessment in a subpopulation of young Argentine patients with severe periodontitis / Periodontitis severa en jóvenes argentinos. Evaluación clínica y microbiológica en jóvenes argentinos con periodontitis severa

ABSTRACT Aggressive periodontitis (AP) is the most serious entity of periodontal disease (stage III/IV, grade C periodontitis according to the latest classification, 2017). Aim: to enhance knowledge of periodontal microbiota in AP in native Argentine patients and describe the effect of a combined pharmacological-mechanicalperiodontal treatment on clinical and microbiological parameters. Materials andMethod: The study analyzed 42 periodontal sites in 11 patients diagnosed with AP. Clinical periodontal parameters were recorded at baseline, 45, 90 and 180 days. Microbiological samples were taken before treatment and at 180 days. PCR was used to determine presence of the periodontopathic bacteria Aggregatibacter actinomycetemcomitans (Aa), Porphyromonas gingivalis (Pg), Tannerella forsythia (Tf), Treponema denticola (Td), Prevotella intermedia (Pi) and Fusobacterium nucleatum (Fn). Patients underwent periodontal therapy including antibiotics (Amoxicillin 500mg + Metronidazole 250mg; 8hs/7 days), and were reevaluated at 45, 90 and 180 days. Results: Mean age was 28.4 ± 7.9 years. The initial PCR detected the following frequencies: Aa 14.3%, Pi 61.9%, Pg 71.4%, Tf 81.0%, Fn 95.2% and Td 97.6%. Baseline microbiological samples revealed significantly higher prevalence of Pg over Aa (p=0.012). Clinical parameters improved significantly after treatment (73.8% PS<5 mm; PS, NIC, SS p<0.001). At 180 days, a significant decrease in microbiological detection rates was observed (Fn, Td, Tf, Pi, Aa p<0.05). Aa was no longer detectable while Pg did not decrease significantly (p=0.052). Fn was the only study species detected in 100% (n=11:42) of residual pockets (PS>5 mm) (p=0.053). Conclusion: In the initial samples, there was significant prevalence of Pg over Aa. Significant clinical improvement was achieved after the mechanical-pharmacological treatment, with undetectable levels ofAa, while Fn persisted in residual pockets, and Pg was present at most of the treated sites.

RESUMEN La periodontitis agresiva (PA) es la entidad más grave de la enfermedad periodontal (clasificación 2017: periodontitis estadio III/IV, grado C). Objetivo: mejorar el conocimiento sobre la microbiota periodontal de la PA en sujetos nativos argentinos y describir el efecto de un tratamiento mecánico-farmacológico periodontal sobre los parámetros clínicos y microbiológicos. Materiales y Método: se estudiaron 42 sitios periodontales correspondientes a 11 pacientes con PA. Los parámetros clínicos se registraron a 0, 45, 90 y 180 días. Las tomas microbiológicas se realizaron antes de iniciar el tratamiento y a los 180 días. La determinación de especies periodontopáticas (Aggregatibacter actinomycetemcomitans (Aa), Porphyromonas gingivalis (Pg), Tannerella forsythia (Tf, Treponema denticola (Td), Prevotella intermedia (Pi) y Fusobacterium nucleatum (Fn)) se realizó por PCR. Los pacientes iniciaron terapia básica periodontal junto con antibioticoterapia (Amoxicilina 500 mg + Metronidazol 250 mg; 8 hs/7 días) y fueron evaluados a los 45, 90 y 180 días. Resultados: la edad media fue 28,4 ± 7,9 años. Las detecciones iniciales fueron: Aa 14,3%, Pi 61,9%, Pg 71,4%, Tf 81,0%, Fn 95,2% y Td 97,6%. En las muestras iniciales la prevalencia de Pg sobre Aa fue significativamente superior (p=0,012). Los pacientes tuvieron una respuesta clínica favorable al tratamiento (73,8% PS<5 mm; PS, NIC, SS p<0,001). A 180 días, se observó una disminución estadísticamente significativa en la detección microbiana (Fn, Td, Tf, Pi, Aa p<0,05). En igual plazo, Aa no fue detectado, mientras que Pg mostró una disminución no significativa (p=0,052). Fn fue el único detectado en el 100% (n=11:42) de las bolsas periodontales residuales (PS>5 mm) (p=0,053). Conclusión: Las muestras iniciales evidenciaron prevalencia significativa de Pg sobre Aa. El tratamiento logró una significativa mejora clínica con niveles indetectables de Aa. La persistencia de Fn en las bolsas residuales y de Pg en la mayoría de los sitios tratados, caracterizaron la muestra poblacional estudiada.

Strabismus Surgery Decreases the Risk of Injuries in Pediatric Patients in the OptumLabs Data Warehouse.

PURPOSE: Previous studies have shown an association between injury risk and strabismus in aged Medicare beneficiaries and children. The injury prevalence in strabismic children was 30% in a study of >10 million patients in the OptumLabs Data Warehouse. The purpose of this study was to determine whether strabismus surgery decreases the risk of injury. DESIGN: Retrospective cohort study. METHODS: The OptumLabs Data Warehouse is a deidentified, longitudinal health database that was queried for strabismic patients aged <19 years. The patients who underwent strabismus surgery were compared with those strabismic patients who did not undergo surgery for injury. Injury risk (fractures, musculoskeletal injuries, and head injuries) during their insurance enrollment was calculated in the nonsurgical patients after their first strabismus claim and compared with the risk in surgical patients postoperatively. RESULTS: There were 344,794 patients with strabismus. Surgery was performed in 26,459 (7.7%). Esotropia was the most common diagnosis (n = 181,195, 52.6%) followed by exotropia (n = 161,712, 46.9%) and hypertropia (n = 43,831, 12.7%). Within these groups, patients with hypertropia were significantly more likely to undergo surgery (24.2%) compared with patients with esotropia and exotropia (10.2% and 9.6%, respectively). Injuries were diagnosed after the first strabismus claim in 94,960 (29.8%) nonsurgical patients vs 5790 (21.9%) postsurgical patients (P < .001) with a mean follow-up of 4.3 ± 3.1 vs 3.8 ± 3.1 years, respectively. The adjusted hazard ratio for injuries was 0.85 (95% confidence interval [CI]: 0.83-0.87) for the risk of any injury after strabismus surgery. The hazard ratio was significantly decreased after surgery for each type of strabismus: esotropia (0.91, 95% CI: 0.88-0.94), exotropia (0.82, 95% CI: 0.80-0.85), and hypertropia (0.89, 95% CI: 0.85-0.93). DISCUSSION: Strabismus surgery was associated with a 15% decrease in the risk of physical injury over approximately 4 years of follow-up. Surgery may be a factor in decreasing injury risk in strabismic patients, particularly in exotropia. Given the large number of children with strabismus in the United States, further assessment of strategies such as strabismus surgery to reduce injuries in children with strabismus is needed.

Field technical applicability and cost analysis for microwave based regenerating permeable reactive barriers (MW-PRBs) operating in Cs-contaminated groundwater treatment.

The present study tests the potentiality of a novel microwave based regenerating permeable reactive barrier (MW-PRB) system as combined treatment for Cs-contaminated groundwater. Granular activated carbon (GAC) was selected as adsorptive materials in batch and column MW-regeneration experiments. Experimental and modeling data were elaborated for technical and economic considerations in order to assess the MW-PRB feasibility jointly with essential information regarding its real field applicability. Batch experiments investigated the effects of 10 adsorption-MW regeneration cycles under different MW irradiation conditions (applied electric field = 200-460 V m-1; irradiation times = 1-15 min) by assessing GAC variation properties in term of regeneration yield (δ), specific area and weight loss (WL) variation. Column tests were carried using a dedicated setup essentially including a column filled with GAC implanted in a MW oven cavity (MW electric field of 385 V m-1, irradiation times 5-15 min). Lab-scale results shown the ability of MW in Cs removal from GAC as demonstrated by regeneration yield (δ = 79-110%) and WL (6.78% for 10 cycles) values. This was confirmed in dynamic conditions by data from MW-column tests highlighting the highest Cs removal of ~80% when the maximum regeneration time was applied. Residual Cs concentration in breakthrough curves fitted well with the proposed Yoon and Nelson model (R2 = ~0.97). Results from techno-economic analysis revealed the MW-PRB viability and its advantages also in comparison with conventional PRB systems, demonstrating the concept of combined MW-PRB treatment. Saved cost obtained demonstrated in fact the potential cost effectiveness of MW-PRB system and, consequently, the implementation of novel approach is encouraged. Calculated PRB longevity vs groundwater velocity curves are useful in order to predict long-term PRB performance and the response of the remediation activities, as well as for guiding the design and the scaling-up of MW-PRB treatment.

[Infoxication in health. Health information overload on the Internet and the risk of important information becoming invisible]. / Infoxicación en salud. La sobrecarga de información sobre salud en la web y el riesgo de que lo importante se haga invisible.

OBJECTIVE: The objectives of this study were to: 1) raise awareness of the volume of quality health information on the Internet; 2) explore perceptions of information professionals with regard to the use of qualified sources for health decision-making; and 3) make recommendations that facilitate strengthening health worker capacities and institutional competencies related to digital literacy. METHODS: A non-experimental, descriptive cross-sectional study was conducted with a non-probability sample of 32 information professionals from nine countries. Internet information was compiled on the volume of content in Internet tools, social networks, and health information sources. Searches in English and Spanish were carried out using the keywords Ebola, Zika, dengue, chikungunya, safe food, health equity, safe sex, and obesity. Finally, information was obtained on opportunities for formal education on the subjects of digital literacy, information management, and other related topics. RESULTS: Selecting only four diseases with a high impact on public health in May 2016 and averaging minimum review time for each information product, it would take more than 50 years without sleeping to consult everything that is published online about dengue, Zika, Ebola, and chikungunya. CONCLUSION: We conclude that public health would benefit from: health institutions implementing formal knowledge management strategies; academic health sciences institutions incorporating formal digital literacy programs; and having health workers who are professionally responsible and functional in the information society.

Environmental Life Cycle Assessment of marine sediment decontamination by citric acid enhanced-microwave heating.

The potential ability of microwave heating (MWH) for the remediation of marine sediments affected by severe hydrocarbon (HC) contamination was investigated. Decontamination effectiveness and environmental sustainability through a comparative Life Cycle Assessment (LCA) were addressed. Main results revealed that the application of a 650-W MWH treatment resulted in a rapid (15min) HC removal. A citric acid (CA) dose of 0.1M led to enhanced-HC removals of 76.9, 96.5 and 99.7% after 5, 10 and 15min of MW irradiation, respectively. The increase in CA dose to 0.2M resulted in a shorter successful remediation time of 10min. The exponential kinetic model adopted showed a good correlation with the experimental data with R2 values in the 0.913-0.987 range. The nature of the MW treatment was shown to differently influence the HC fraction concentration after the irradiation process. Achieved HC removals in such a short remediation time are hardly possible by other clean-up techniques, making the studied treatment a potential excellent choice. Removal mechanisms, which allowed the enhanced-MWH to operate as a highly effective multi-step technique (pure thermal desorption+chemical washing), undoubtedly represent a key factor in the whole remediation process. The LCA highlighted that the MW technology is the most environmentally sustainable alternative for sediment decontamination applications, with a total damage, which was 75.74% lower than that associated with the EK (0.0503pt).

Hybrid Single-Port Cholecystectomy Vs Four-Port Cholecystectomy in Children.

BACKGROUND AND OBJECTIVES: Evidence is increasing that single-port or single-incision laparoscopic cholecystectomy is a safe and feasible alternative for cholecystectomy in children. In this study, we sought to compare the single-port hybrid technique, which we originally reported in 2012, with the conventional 4-port approach, in regards of complications, outcome, operative time and cost. METHODS: A retrospective, single-center comparison of hybrid single-port versus conventional 4-port laparoscopic cholecystectomy was performed in 98 consecutive pediatric patients between January 2010 and October 2014. Patient characteristics, intra- and postoperative outcomes, operative costs, and total hospitalization costs were compared between the 2 approaches using univariate and multivariate analyses. RESULTS: The single-port technique was utilized in 56 (57%) pediatric patients who underwent laparoscopic cholecystectomy. The operative time for single-port procedures was shorter than that of the conventional technique (median, 85 minutes vs 114 minutes; P = .003). Patients with single-port procedures were less likely to have a cholangiogram compared to patients who underwent 4-port cholecystectomy. (9% vs 40%; P < .001). No statistically significant differences between the 2 cohorts were observed for intra- or postoperative outcomes. Although the 2 groups shared nearly the same median duration of hospitalization (22 hours vs 21 hours; P = .70), the single-port group demonstrated a lower total cost of hospitalization (median cost, $7438 vs $8783; P = .030) and lower operative cost (median, $3918 vs $4647; P < .001). CONCLUSION: Hybrid single-port laparoscopic cholecystectomy in children with uncomplicated gallbladder disease is feasible and equally safe, with similar intra- and postoperative outcomes compared with the conventional 4-port approach. It can contribute to global cost reduction because of lower operative and total hospitalization costs.

Infoxicación en salud. La sobrecarga de información sobre salud en la web y el riesgo de que lo importante se haga invisible

Objetivo. Este estudio tiene como objetivos 1) crear conciencia del volumen de información en salud existente en la web de calidad, 2) explorar la percepción de profesionales de la información con relación al uso de fuentes cualificadas en la toma de decisiones en salud, y 3) presentar recomendaciones que permitan fortalecer las capacidades de los trabajadores de la salud y las competencias institucionales relacionadas con la alfabetización digital. Métodos. Se realizó un estudio no experimental descriptivo transversal con una muestra no probabilística de 32 profesionales de la información de nueve países. Se recopiló información de internet sobre el volumen de contenidos existentes en herramientas web, redes sociales y fuentes de información en salud. Se realizaron búsquedas en inglés y en español utilizando las palabras clave Ebola, Zika, Dengue, Chikungunya, Safe food, Health equity, Safe sex, y Obesit. Por último, se obtuvo información sobre la oferta de formación formal en temas de alfabetización digital, gestión de información y otros relacionados. Resultados. Seleccionando sólo cuatro enfermedades de alto impacto en salud pública en mayo de 2016 y promediando un tiempo de revisión mínimo de cada producto de información, se tardaría más de 50 años seguidos sin dormir para consultar todo lo publicado en línea sobre Dengue, Zika, Ebola y Chikungunja. Conclusión. Se concluye que la salud pública se beneficiaría con instituciones de salud que implementaran estrategias formales de gestión del conocimiento, con instituciones académicas de ciencias de la salud que incorporaran programas formales de alfabetización digital y con trabajadores de la salud cuyo desarrollo profesional sea responsable y funcional en la sociedad de la información.

Objective. The objectives of this study were to: 1) raise awareness of the volume of quality health information on the Internet; 2) explore perceptions of information professionals with regard to the use of qualified sources for health decision-making; and 3) make recommendations that facilitate strengthening health worker capacities and institutional competencies related to digital literacy. Methods. A non-experimental, descriptive cross-sectional study was conducted with a non-probability sample of 32 information professionals from nine countries. Internet information was compiled on the volume of content in Internet tools, social networks, and health information sources. Searches in English and Spanish were carried out using the keywords Ebola, Zika, dengue, chikungunya, safe food, health equity, safe sex, and obesity. Finally, information was obtained on opportunities for formal education on the subjects of digital literacy, information management, and other related topics. Results. Selecting only four diseases with a high impact on public health in May 2016 and averaging minimum review time for each information product, it would take more than 50 years without sleeping to consult everything that is published online about dengue, Zika, Ebola, and chikungunya. Conclusion. We conclude that public health would benefit from: health institutions implementing formal knowledge management strategies; academic health sciences institutions incorporating formal digital literacy programs; and having health workers who are professionally responsible and functional in the information society.

Objetivos. 1) Conscientizar sobre o volume de informação em saúde de qualidade existente na internet, 2) explorar a percepção dos profissionais da informação sobre o uso de fontes qualificadas na tomada de decisão em saúde e 3) fazer recomendações para reforçar o preparo dos profissionais de saúde e as competências institucionais quanto à alfabetização digital. Métodos. Foi realizado estudo transversal descritivo não experimental em uma amostra não probabilística com 32 profissionais da informação de nove países. Foi coletada informação da internet sobre o volume de conteúdos existentes sobre ferramentas de internet, redes sociais e fontes de informação em saúde. Foram realizadas buscas em inglês e espanhol utilizando as palavras-chave Ebola, Zika, Dengue, Chikungunya, Safe food, Health equity, Safe sex, e Obesity. E foi obtida informação sobre a oferta de cursos de formação em alfabetização digital, gestão da informação e outros tópicos relacionados. Resultados. Com a seleção de apenas quatro doenças de alto impacto em saúde pública em maio de 2016, com tempo de revisão médio mínimo para cada produto de informação, seriam necessários mais de 50 anos contínuos, sem intervalo para dormir, para consultar todo o conteúdo publicado online sobre dengue, zika, Ebola e chikungunya. Conclusão. Conclui-se que existiria benefício para a saúde pública se as instituições de saúde implementassem estratégias formais de gestão do conhecimento, as instituições acadêmicas de ciências da saúde incorporassem programas formais de alfabetização digital e os profissionais de saúde investissem em desenvolvimento profissional responsável e prático na sociedade da informação.

Application of a γRS index-based method and techno-economic analysis for in situ treatment of 137Cs-contaminated soils by cement-barite based stabilisation/solidification.

This paper examines the application of cement (C)-barite (Ba) based-Stabilisation/Solidification (S/S) for the remediation of 137Cs-contaminated soils, investigating the influence of soil: grout and C: Ba ratios on the shielding performance of the S/S mix assessed as gamma radiation shielding (γRS) index variation. Results from experiments were used to perform a novel approach and an economic analysis in order to calculate the effective dose reduction achievable by S/S and to assess the optimum quantities and costs of selected mixes, respectively. Gamma ray spectrometer measurements indicate that γRS index increases with increasing barite percentage up to a maximum level of 50%; however a further increase results in a worsening of the shielding performances. A maximum γRS variation of 46.5% was recorded with grout percentage increasing from 16.6 to 50%. At the photon energy of 662 keV (137Cs), the maximum grout amount results in the possibility to shield up to 24.1% of γ-rays emitted. The effective dose reduction achievable by the investigated S/S allows a maximum 137Cs-soil contamination in the range 2.94-14.55 kBq kg-1 successfully treatable employing a soil: grout ratio of 1: 1 (C: Ba = 1:1). Technical data, jointly with economic analysis findings, make cement-barite based-S/S very competitive in cost-effectiveness and could provide a basis for decision-making of 137Cs-contaminated site remediation.

Infoxicación en salud. La sobrecarga de información sobre salud en la web y el riesgo de que lo importante se haga invisible / Infoxication in health. Health information overload on the Internet and the risk of important information becoming invisible / Infoxicação em saúde. A sobrecarga de informação em saúde na internet e o risco de ficar invisível o que é importante

RESUMEN Objetivo Este estudio tiene como objetivos 1) crear conciencia del volumen de información en salud existente en la web de calidad, 2) explorar la percepción de profesionales de la información con relación al uso de fuentes cualificadas en la toma de decisiones en salud, y 3) presentar recomendaciones que permitan fortalecer las capacidades de los trabajadores de la salud y las competencias institucionales relacionadas con la alfabetización digital. Métodos Se realizó un estudio no experimental descriptivo transversal con una muestra no probabilística de 32 profesionales de la información de nueve países. Se recopiló información de internet sobre el volumen de contenidos existentes en herramientas web, redes sociales y fuentes de información en salud. Se realizaron búsquedas en inglés y en español utilizando las palabras clave Ebola, Zika, Dengue, Chikungunya, Safe food, Health equity, Safe sex, y Obesit. Por último, se obtuvo información sobre la oferta de formación formal en temas de alfabetización digital, gestión de información y otros relacionados. Resultados Seleccionando sólo cuatro enfermedades de alto impacto en salud pública en mayo de 2016 y promediando un tiempo de revisión mínimo de cada producto de información, se tardaría más de 50 años seguidos sin dormir para consultar todo lo publicado en línea sobre Dengue, Zika, Ebola y Chikungunja. Conclusión Se concluye que la salud pública se beneficiaría con instituciones de salud que implementaran estrategias formales de gestión del conocimiento, con instituciones académicas de ciencias de la salud que incorporaran programas formales de alfabetización digital y con trabajadores de la salud cuyo desarrollo profesional sea responsable y funcional en la sociedad de la información.

ABSTRACT Objective The objectives of this study were to: 1) raise awareness of the volume of quality health information on the Internet; 2) explore perceptions of information professionals with regard to the use of qualified sources for health decision-making; and 3) make recommendations that facilitate strengthening health worker capacities and institutional competencies related to digital literacy. Methods A non-experimental, descriptive cross-sectional study was conducted with a non-probability sample of 32 information professionals from nine countries. Internet information was compiled on the volume of content in Internet tools, social networks, and health information sources. Searches in English and Spanish were carried out using the keywords Ebola, Zika, dengue, chikungunya, safe food, health equity, safe sex, and obesity. Finally, information was obtained on opportunities for formal education on the subjects of digital literacy, information management, and other related topics. Results Selecting only four diseases with a high impact on public health in May 2016 and averaging minimum review time for each information product, it would take more than 50 years without sleeping to consult everything that is published online about dengue, Zika, Ebola, and chikungunya. Conclusion We conclude that public health would benefit from: health institutions implementing formal knowledge management strategies; academic health sciences institutions incorporating formal digital literacy programs; and having health workers who are professionally responsible and functional in the information society.

RESUMO Objetivos 1) Conscientizar sobre o volume de informação em saúde de qualidade existente na internet, 2) explorar a percepção dos profissionais da informação sobre o uso de fontes qualificadas na tomada de decisão em saúde e 3) fazer recomendações para reforçar o preparo dos profissionais de saúde e as competências institucionais quanto à alfabetização digital. Métodos Foi realizado estudo transversal descritivo não experimental em uma amostra não probabilística com 32 profissionais da informação de nove países. Foi coletada informação da internet sobre o volume de conteúdos existentes sobre ferramentas de internet, redes sociais e fontes de informação em saúde. Foram realizadas buscas em inglês e espanhol utilizando as palavras-chave Ebola, Zika, Dengue, Chikungunya, Safe food, Health equity, Safe sex, e Obesity. E foi obtida informação sobre a oferta de cursos de formação em alfabetização digital, gestão da informação e outros tópicos relacionados. Resultados Com a seleção de apenas quatro doenças de alto impacto em saúde pública em maio de 2016, com tempo de revisão médio mínimo para cada produto de informação, seriam necessários mais de 50 anos contínuos, sem intervalo para dormir, para consultar todo o conteúdo publicado online sobre dengue, zika, Ebola e chikungunya. Conclusão Conclui-se que existiria benefício para a saúde pública se as instituições de saúde implementassem estratégias formais de gestão do conhecimento, as instituições acadêmicas de ciências da saúde incorporassem programas formais de alfabetização digital e os profissionais de saúde investissem em desenvolvimento profissional responsável e prático na sociedade da informação.

Clinical assessment of hypoperfusion in acute heart failure ­ evergreen or antique?

BACKGROUND: Cold hemodynamic profile assessed on physical examination predicts survival, although it has low specificity and low reproducibility. We herein propose a new cold profile definition (Cold Modified 2014), including renal and hepatic damage. The aim of the study was to evaluate the additional prognostic value of clinical and laboratory identification of hypoperfusion over hypotension in the setting of advanced acute heart failure (AHF). METHODS AND RESULTS: After preliminary analysis on derivation cohort, we studied 223 consecutive NYHA III-IV patients admitted with AHF requiring intensive care. Cold Modified 2014 definition included non-invasive hemodynamic assessment, renal and hepatic injury. Primary endpoint was a composite of cardiac death, urgent heart transplantation and mechanical circulatory support at 6 months. In the validation cohort (age, 60.5 ± 12.8 years; ejection fraction 25.6 ± 8.2%, systolic blood pressure [SBP] 104.3 ± 26.1 mmHg) 77 reached the composite endpoint. Among SBP, ADHERE model, cold profile at admission and INTERMACS profile at 48 h, cold profile had the best diagnostic accuracy. On multivariate analysis only cold profile and INTERMACS predicted events, while SBP <115 mmHg and high risk on ADHERE did not. Cold Modified 2014 was more accurate than the old definition. Net reclassification improvement for Cold Modified 2014 over the old definition was 25.8%. CONCLUSIONS: This prospective study demonstrated the additional prognostic role of hypoperfusion assessment over hypotension in patients with AHF. Cold Modified 2014 improved risk stratification in advanced AHF patients.

On the use of information theory for the analysis of synchronous nociceptive withdrawal reflexes and somatosensory evoked potentials elicited by graded electrical stimulation.

BACKGROUND: To date, few studies have combined the simultaneous acquisition of nociceptive withdrawal reflexes (NWR) and somatosensory evoked potentials (SEPs). In fact, it is unknown whether the combination of these two signals acquired simultaneously could provide additional information on somatosensory processing at spinal and supraspinal level compared to individual NWR and SEP signals. NEW METHOD: By using the concept of mutual information (MI), it is possible to quantify the relation between electrical stimuli and simultaneous elicited electrophysiological responses in humans based on the estimated stimulus-response signal probability distributions. RESULTS: All selected features from NWR and SEPs were informative in regard to the stimulus when considered individually. Specifically, the information carried by NWR features was significantly higher than the information contained in the SEP features (p<0.05). Moreover, the joint information carried by the combination of features showed an overall redundancy compared to the sum of the individual contributions. Comparison with existing methods MI can be used to quantify the information that single-trial NWR and SEP features convey, as well as the information carried jointly by NWR and SEPs. This is a model-free approach that considers linear and non-linear correlations at any order and is not constrained by parametric assumptions. CONCLUSIONS: The current study introduces a novel approach that allows the quantification of the individual and joint information content of single-trial NWR and SEP features. This methodology could be used to decode and interpret spinal and supraspinal interaction in studies modulating the responsiveness of the nociceptive system.

Functional and clinical assessment of two ankle arthrodesis techniques.

Isolated tibiotalar fusion is the preferred choice for isolated end-stage arthritis, joint destruction after infection, talar avascular necrosis, Charcot neuroarthropathy, and joint replacement failure. Combined tibiotalar and subtalar joint fusion with an intramedullary nail can achieve better alignment and save patients from prolonged non-weightbearing. The purpose of the present study was to functionally assess using instrumental gait analysis and clinically assess the effect of these 2 surgical techniques. Twelve patients with a mean follow-up duration of 70 (range 55 to 89) months after successful ankle fusion were analyzed, 6 isolated and 6 combined. The main outcome measure was the functional assessment performed using a stereophotogrammetric system and an established multisegment foot kinematics protocol. Standard clinical, imaging, and score systems were also assessed in the 2 groups, including radiographic-based classification of arthritic degeneration at the neighboring foot joints. No significant differences were found between the 2 groups using the scoring systems. Severe arthritic degeneration was found at the subtalar joint in the isolated fusion group and at the talonavicular and Lisfranc joints in the combined fusion group. From the gait analysis, no differences were found in the time-distance parameters; however, significant differences were observed in several joint rotations and planar angles. Isolated tibiotalar fusion allows for motion, however small, at the subtalar joint but can result in severe degeneration. Good clinical and functional results can also be obtained with combined tibiotalar and subtalar fusion, although this can result in degeneration of the adjacent joints of the foot.

Assessment of torsion after superior rectus transposition with or without medial rectus recession for Duane syndrome and abducens nerve palsy.

BACKGROUND: Superior rectus transposition with or without medial rectus recession has been advocated for the treatment of abducens nerve palsy and esotropic Duane syndrome. Early reports have focused mainly on postoperative ocular alignment, but there is concern that superior rectus transposition may induce torsional misalignment. The purpose of this study was to evaluate torsional outcomes after superior rectus transposition surgery using prospective preoperative and postoperative torsional assessments. METHODS: Prospective measurements were performed on all patients undergoing superior rectus transposition. Preverbal infants were assessed using fundus torsion evaluating the position of the fovea relative to the optic nerve; older children/adults underwent double Maddox rod (DMR) assessment of torsion. RESULTS: A total of 11 subjects met the study inclusion criteria. The etiology of strabismus was an abducens nerve palsy (n = 7) or Duane syndrome (n = 4). For the subjects evaluated by fundus torsion (n = 4), there was no significant change in torsion for 3 (75%). For those subjects undergoing DMR (n = 7), there was a significant change in subjective torsion (4.7 ± 3.8°excyclotorsion vs 0.0° ± 5.0° excyclotorsion; P = 0.004). Esotropic deviation improved significantly for all subjects (39(Δ) ± 23(Δ) vs 6.5(Δ) ± 13(Δ); P = 0.001) and no significant mean vertical deviation postoperatively, although 1 patient had a clinically significant postoperative hypertropia measuring 14(Δ). Abduction also improved significantly (-4.2 ± 0.9 vs -2.8 ± 1, P = 0.0001). CONCLUSIONS: In this patient series, superior rectus transposition with medial rectus recession did not have clinically significant induction of torsional diplopia as a result of the procedure.

Combining off-lattice Monte Carlo and cellular automata for the simulation of hard-sphere systems.

In the present work we show how the update rule of a diffusive cellular automaton with mutual exclusion can be exploited in off-lattice Monte Carlo simulations of hard spheres to obtain a synchronous Monte Carlo sampling that satisfies the detailed balance principle.

Improved waiting-list outcomes in Argentina after the adoption of a model for end-stage liver disease-based liver allocation policy.

In July 2005, Argentina became the first country after the United States to introduce the Model for End-Stage Liver Disease (MELD) for organ allocation. In this study, we investigated waiting-list (WL) outcomes (n = 3272) and post-liver transplantation (LT) survival in 2 consecutive periods of 5 years before and after the implementation of a MELD-based allocation policy. Data were obtained from the database of the national institute for organ allocation in Argentina. After the adoption of the MELD system, there were significant reductions in WL mortality [28.5% versus 21.9%, P < 0.001, hazard ratio (HR) = 1.57, 95% confidence interval (CI) = 1.37-1.81] and total dropout rates (38.6% versus 29.1%, P < 0.001, HR = 1.31, 95% CI = 1.16-1.48) despite significantly less LT accessibility (57.4% versus 50.7%, P < 0.001, HR = 1.53, 95% CI = 1.39-1.68). The annual number of deaths per 1000 patient-years at risk decreased from 273 in 2005 to 173 in 2010, and the number of LT procedures per 1000 patient-years at risk decreased from 564 to 422. MELD and Model for End-Stage Liver Disease-Sodium scores were excellent predictors of 3-month WL mortality with c statistics of 0.828 and 0.857, respectively (P < 0.001). No difference was observed in 1-year posttransplant survival between the 2 periods (81.1% versus 81.3%). Although patients with a MELD score > 30 had lower posttransplant survival, the global accuracy of the score for predicting outcomes was poor, as indicated by a c statistic of only 0.523. Patients with granted MELD exceptions (158 for hepatocellular carcinoma and 52 for other reasons) had significantly higher access to LT (80.4%) in comparison with nonexception patients with equivalent listing priority (MELD score = 18-25; 54.6%, P < 0.001, HR = 0.49, 95% CI = 0.40-0.61). In conclusion, the adoption of the MELD model in Argentina has resulted in improved liver organ allocation without compromising posttransplant survival.

Speeding up simulation of diffusion in zeolites by a parallel synchronous kinetic Monte Carlo algorithm.

Understanding the behaviors of molecules in tight confinement is a challenging task. Standard simulation tools like kinetic Monte Carlo have proven to be very effective in the study of adsorption and diffusion phenomena in microporous materials, but they turn out to be very inefficient when simulation time and length scales are extended. In this paper we have explored the possibility of application of a discrete version of the synchronous parallel kinetic Monte Carlo algorithm introduced by Martínez et al. [J. Comput. Phys. 227, 3804 (2008)] to the study of aromatic hydrocarbons diffusion in zeolites. The efficiency of this algorithm is investigated as a function of the number of processors and domain size. We show that with an accurate choice of domains size it is possible to achieve very good efficiencies thus permitting us to effectively extend space and time scales of the simulated system.

A historical overview of the United States-Mexico Border Diabetes Prevention and Control Project.

Diabetes is a serious public health problem in the border region between the United States of America and Mexico, reflecting and by some measures surpassing the extent of national diabetes burden of each country. The U.S.-Mexico Border Diabetes Prevention and Control Project, a two-phase prevalence study on type 2 diabetes and its risk factors, was conceived and developed by culturally diverse groups of people representing more than 100 government agencies and nongovernmental organizations; health care providers; and residents of 10 U.S. and Mexican border states, using a participatory approach, to address this disproportionate incidence of diabetes. This report describes the project's history, conceptualization, participatory approach, implementation, accomplishments, and challenges, and recommends a series of steps for carrying out other binational participatory projects based on lessons learned.

United States-Mexico Border Diabetes Prevalence Survey: lessons learned from implementation of the project.

This paper reviews and discusses the main procedures and policies that need to be followed when designing and implementing a binational survey such as the United States of America (U.S.)-Mexico Border Diabetes Prevalence Study that took place between 2001 and 2002. The main objective of the survey was to determine the prevalence of diabetes in the population 18 years of age or older along U.S.-Mexico border counties and municipalities. Several political, administrative, financial, legal, and cultural issues were identified as critical factors that need to be considered when developing and implementing similar binational projects. The lack of understanding of public health practices, implementation of existing policies, legislation, and management procedures in Mexico and the United States may delay or cancel binational research, affecting the working relation of both countries. Many challenges were identified: multiagency/multifunding, ethical/budget clearances, project management, administrative procedures, laboratory procedures, cultural issues, and project communications. Binational projects are complex; they require coordination between agencies and institutions at federal, state, and local levels and between countries and need a political, administrative, bureaucratic, cultural, and language balance. Binational agencies and staff should coordinate these projects for successful implementation.