Assessment of pharmacologically induced changes in canine kidney function by multiparametric magnetic resonance imaging and contrast enhanced ultrasound.

Introduction: Dynamic contrast-enhanced (DCE) MRI and arterial spin labeling (ASL) MRI enable non-invasive measurement of renal blood flow (RBF), whereas blood oxygenation level-dependent (BOLD) MRI enables non-invasive measurement of the apparent relaxation rate (R2*), an indicator of oxygenation. This study was conducted to evaluate the potential role of these MRI modalities in assessing RBF and oxygenation in dogs. The correlation between contrast-enhanced ultrasound (CEUS) and the MRI modalities was examined and also the ability of the MRI modalities to detect pharmacologically induced changes. Methods: RBF, using CEUS, ASL- and DCE-MRI, as well as renal oxygenation, using BOLD-MRI of eight adult beagles were assessed at two time-points, 2­3 weeks apart. During each time point, the anesthetized dogs received either a control (0.9% sodium chloride) or a dopamine treatment. For each time point, measurements were carried out over 2 days. An MRI scan at 3 T was performed on day one, followed by CEUS on day two. Results: Using the model-free model with caudal placement of the arterial input function (AIF) region of interest (ROI) in the aorta, the DCE results showed a significant correlation with ASL measured RBF and detected significant changes in blood flow during dopamine infusion. Additionally, R2* negatively correlated with ASL measured RBF at the cortex and medulla, as well as with medullary wash-in rate (WiR) and peak intensity (PI). ASL measured RBF, in its turn, showed a positive correlation with cortical WiR, PI, area under the curve (AUC) and fall time (FT), and with medullary WiR and PI, but a negative correlation with medullary rise time (RT). During dopamine infusion, BOLD-MRI observed a significant decrease in R2* at the medulla and entire kidney, while ASL-MRI demonstrated a significant increase in RBF at the cortex, medulla and the entire kidney. Conclusion: ASL- and BOLD-MRI can measure pharmacologically induced changes in renal blood flow and renal oxygenation in dogs and might allow detection of changes that cannot be observed with CEUS. However, further research is needed to confirm the potential of ASL- and BOLD-MRI in dogs and to clarify which analysis method is most suitable for DCE-MRI in dogs.

Optimization of Fair Arterial Spin Labeling Magnetic Resonance Imaging (ASL-MRI) for Renal Perfusion Quantification in Dogs: Pilot Study.

Arterial spin labeling (ASL) MRI allows non-invasive quantification of renal blood flow (RBF) and shows great potential for renal assessment. To our knowledge, renal ASL-MRI has not previously been performed in dogs. The aim of this pilot study was to determine parameters essential for ALS-MRI-based quantification of RBF in dogs: T1, blood (longitudinal relaxation time), λ (blood tissue partition coefficient) and TI (inversion time). A Beagle was scanned at 3T with a multi-TI ASL sequence, with TIs ranging from 250 to 2500 ms, to determine the optimal TI value. The T1 of blood for dogs was determined by scanning a blood sample with a 2D IR TSE sequence. The water content of the dog's kidney was determined by analyzing kidney samples from four dogs with a moisture analyzer and was subsequently used to calculate λ. The optimal TI and the measured values for T1,blood, and λ were 2000 ms, 1463 ms and 0.91 mL/g, respectively. These optimized parameters for dogs resulted in lower RBF values than those obtained from inline generated RBF maps. In conclusion, this study determined preliminary parameters essential for ALS-MRI-based RBF quantification in dogs. Further research is needed to confirm these values, but it may help guide future research.

[Strategies for health services in women, newborns, children, and adolescents during the COVID-19 pandemic in countries of Americas]. / Estrategias de servicios de salud en mujeres, recién nacidos/as, niños/as y adolescentes durante la pandemia de COVID-19 en países de las Américas.

The article analyzes the perceived challenges and strategies implemented in five Latin American and Caribbean countries to ensure continuity of care and access to health services for women, newborns, children, and adolescents during the COVID-19 pandemic. The study corresponds to a quick assessment based on semi-structured interviews with key informants in countries selected by convenience: Colombia, Ecuador, Guatemala, Grenada, and the Dominican Republic. Interviews were conducted with 23 key informants: (a) decision makers at the national and/or subnational level, (b) healthcare professionals, and (c) representatives of civil society organizations; from December 2020 to January 2021. Among the findings, at the beginning of the pandemic, priority was given to the COVID-19 care, with measures to limit the flow of people to health facilities in the countries involved, closing or limiting outpatient visits and restricting care schedule. For women, this affected family planning services and access to contraceptive methods, implying a reduction in prenatal check-ups. As a result of this deinstitutionalization of care, among newborns, a decrease in pediatric check-ups, a decrease in timely immunization and late detection of pathologies or growth problems were reported. Among adolescents, a strong restriction of family planning services, the limitation of other friendly counseling spaces and difficulties in accessing contraceptives were observed.

El artículo analiza los desafíos percibidos y las estrategias implementadas en cinco países de América Latina y el Caribe para garantizar la continuidad de los cuidados y el acceso a servicios de salud de mujeres, recién nacidos/as, niños/as y adolescentes durante la pandemia por COVID-19. El estudio corresponde a una evaluación rápida basada en entrevistas semi-estructuradas a informantes clave de países seleccionados por conveniencia: Colombia, Ecuador, Guatemala, Granada y República Dominicana. Se realizaron entrevistas con 23 informantes clave: (a) referentes de la toma de decisión a nivel nacional y/o subnacional, (b) referentes de servicios de salud, y (c) representantes de organizaciones de la sociedad civil, durante diciembre de 2020 y enero de 2021. Entre los hallazgos, al inicio de la pandemia se priorizó la atención del COVID-19, con medidas para limitar la afluencia de personas a los establecimientos de salud en los países involucrados, procediendo al cierre o limitación de consultas externas y restricción de horarios de atención. Para las mujeres, esto impactó en los servicios de planificación familiar y el acceso a métodos anticonceptivos, e implicó una reducción de los controles prenatales. Por esta desinstitucionalización de la atención, entre recién nacidos/as fue reportada una disminución de los controles pediátricos, una disminución de su vacunación oportuna y una detección tardía de patologías o problemas de crecimiento. Entre adolescentes, se señaló una fuerte restricción de los servicios de planificación familiar, la limitación de otros espacios amigables de consejería y dificultades para acceder a anticonceptivos.

O artigo analisa os desafios observados e as estratégias implementadas em cinco países da América Latina e do Caribe para garantir a continuidade do atendimento e o acesso aos serviços de saúde para mulheres, recém-nascidos/as, crianças e adolescentes durante a pandemia de COVID-19. O estudo é uma avaliação rápida baseada em entrevistas semiestruturadas com informantes-chave em países selecionados por conveniência: Colômbia, Equador, Guatemala, Granada e República Dominicana. Foram realizadas entrevistas com 23 informantes-chave: (a) tomadores de decisão em nível nacional e/ou subnacional, (b) prestadores de serviços de saúde e (c) representantes de organizações da sociedade civil; durante dezembro de 2020 e janeiro de 2021. Entre as conclusões encontrou-se que, no início da pandemia, foi dada prioridade à COVID-19, com medidas para limitar o fluxo de pessoas às instalações de saúde nos países envolvidos, fechando ou limitando as consultas ambulatoriais e restringindo o horário de atendimento. Para as mulheres, a medida impactou os serviços de planejamento familiar e o acesso à contracepção, significando uma redução nos check-ups pré-natais. Como resultado desta desinstitucionalização dos cuidados, uma diminuição dos check-ups pediátricos, uma diminuição das vacinações no período correto e uma detecção tardia de patologias ou problemas de crescimento foram relatados entre os/as recém-nascidos/as. Entre os adolescentes, foi observada uma restrição severa dos serviços de planejamento familiar, a limitação de acesso a espaços de aconselhamento amigável e dificuldades de acesso a contraceptivos.

Estrategias de servicios de salud en mujeres, recién nacidos/as, niños/as y adolescentes durante la pandemia de COVID-19 en países de las Américas / Strategies for health services in women, newborns, children, and adolescents during the COVID-19 pandemic in countries of Americas / Estratégias de serviços de saúde para mulheres, recém-nascidos/as, crianças e adolescentes durante a pandemia de COVID-19 nos países das Américas

El artículo analiza los desafíos percibidos y las estrategias implementadas en cinco países de América Latina y el Caribe para garantizar la continuidad de los cuidados y el acceso a servicios de salud de mujeres, recién nacidos/as, niños/as y adolescentes durante la pandemia por COVID-19. El estudio corresponde a una evaluación rápida basada en entrevistas semi-estructuradas a informantes clave de países seleccionados por conveniencia: Colombia, Ecuador, Guatemala, Granada y República Dominicana. Se realizaron entrevistas con 23 informantes clave: (a) referentes de la toma de decisión a nivel nacional y/o subnacional, (b) referentes de servicios de salud, y (c) representantes de organizaciones de la sociedad civil, durante diciembre de 2020 y enero de 2021. Entre los hallazgos, al inicio de la pandemia se priorizó la atención del COVID-19, con medidas para limitar la afluencia de personas a los establecimientos de salud en los países involucrados, procediendo al cierre o limitación de consultas externas y restricción de horarios de atención. Para las mujeres, esto impactó en los servicios de planificación familiar y el acceso a métodos anticonceptivos, e implicó una reducción de los controles prenatales. Por esta desinstitucionalización de la atención, entre recién nacidos/as fue reportada una disminución de los controles pediátricos, una disminución de su vacunación oportuna y una detección tardía de patologías o problemas de crecimiento. Entre adolescentes, se señaló una fuerte restricción de los servicios de planificación familiar, la limitación de otros espacios amigables de consejería y dificultades para acceder a anticonceptivos.

The article analyzes the perceived challenges and strategies implemented in five Latin American and Caribbean countries to ensure continuity of care and access to health services for women, newborns, children, and adolescents during the COVID-19 pandemic. The study corresponds to a quick assessment based on semi-structured interviews with key informants in countries selected by convenience: Colombia, Ecuador, Guatemala, Grenada, and the Dominican Republic. Interviews were conducted with 23 key informants: (a) decision makers at the national and/or subnational level, (b) healthcare professionals, and (c) representatives of civil society organizations; from December 2020 to January 2021. Among the findings, at the beginning of the pandemic, priority was given to the COVID-19 care, with measures to limit the flow of people to health facilities in the countries involved, closing or limiting outpatient visits and restricting care schedule. For women, this affected family planning services and access to contraceptive methods, implying a reduction in prenatal check-ups. As a result of this deinstitutionalization of care, among newborns, a decrease in pediatric check-ups, a decrease in timely immunization and late detection of pathologies or growth problems were reported. Among adolescents, a strong restriction of family planning services, the limitation of other friendly counseling spaces and difficulties in accessing contraceptives were observed.

O artigo analisa os desafios observados e as estratégias implementadas em cinco países da América Latina e do Caribe para garantir a continuidade do atendimento e o acesso aos serviços de saúde para mulheres, recém-nascidos/as, crianças e adolescentes durante a pandemia de COVID-19. O estudo é uma avaliação rápida baseada em entrevistas semiestruturadas com informantes-chave em países selecionados por conveniência: Colômbia, Equador, Guatemala, Granada e República Dominicana. Foram realizadas entrevistas com 23 informantes-chave: (a) tomadores de decisão em nível nacional e/ou subnacional, (b) prestadores de serviços de saúde e (c) representantes de organizações da sociedade civil; durante dezembro de 2020 e janeiro de 2021. Entre as conclusões encontrou-se que, no início da pandemia, foi dada prioridade à COVID-19, com medidas para limitar o fluxo de pessoas às instalações de saúde nos países envolvidos, fechando ou limitando as consultas ambulatoriais e restringindo o horário de atendimento. Para as mulheres, a medida impactou os serviços de planejamento familiar e o acesso à contracepção, significando uma redução nos check-ups pré-natais. Como resultado desta desinstitucionalização dos cuidados, uma diminuição dos check-ups pediátricos, uma diminuição das vacinações no período correto e uma detecção tardia de patologias ou problemas de crescimento foram relatados entre os/as recém-nascidos/as. Entre os adolescentes, foi observada uma restrição severa dos serviços de planejamento familiar, a limitação de acesso a espaços de aconselhamento amigável e dificuldades de acesso a contraceptivos.

Toward a marker of upper motor neuron impairment in amyotrophic lateral sclerosis: A fully automatic investigation of the magnetic susceptibility in the precentral cortex.

PURPOSE: Diagnostic work-up in motor neuron disease (MND) needs a quantitative biomarker of upper motor neuron (UMN) impairment. We investigated the susceptibility properties of the precentral cortex in a cohort of patients affected by Amyotrophic lateral sclerosis (ALS) to obtain a useful biomarker of UMN impairment in a fully automatic paradigm. MATERIALS AND METHODS: We retrospectively collected imaging and clinical data of 42 ALS patients who had undergone brain 3 T MRI including tridimensional T1-weighted and spoiled gradient-echo multi-echo T2-weighted images. We further acquired images from 23 healthy control (HC) volunteers. The precentral cortex was automatically segmented and the cortical thickness calculated. Histogram metrics (mean, median, standard deviation, skewness, kurtosis) derived from the quantitative susceptibility map (QSM) were extracted from the automatically segmented precentral cortex. Multivariate regression analyses were performed to identify the variables predicting the disease status (ALS vs HC), the Amyotrophic Lateral Sclerosis Functional Rating Scale-Revised (ALSFRS-R) and the UMN score. RESULTS: A decreased cortical thickness (B = 9.40; Wald's test = 7.43; p = 0.006) and increased susceptibility skewness (B = -3.08; Wald's test = 4.36; p = 0.037) independently predicted ALS in a logistic regression model (χ2(3, N = 65) = 22.07, p < 0.001. No predictors of ALSFRS-R were identified. An increased susceptibility skewness (ß = 0.55; t = 4.23; p < 0.001) and longer disease duration (ß = 0.35; t = 2.67; p = 0.011) independently predicted a higher UMN score in a linear regression model (R2 = 0.32; p < 0.001). CONCLUSION: The susceptibility skewness might be an unbiased quantitative biomarker of UMN impairment in ALS patients.

Looking back and moving forward: can we accelerate progress on adolescent pregnancy in the Americas?

Adolescent fertility rates in Latin America and the Caribbean (LAC) remain unacceptably high, especially compared to the region's declining total fertility rates. The Region has experienced the slowest progress of all regions in the world, and shows major differences between countries and between subgroups in countries. In 2013, LAC was also noted as the only region with a rising trend in pregnancies in adolescents younger than 15 years. In response to the lack of progress in the LAC region, PAHO/WHO, UNFPA and UNICEF held a technical consultation with global, regional and country-level stakeholders to take stock of the situation and agree on strategic approaches and priority actions to accelerate progress. The meeting concluded that there is no single portrait of an adolescent mother in LAC and that context and determinants of adolescent pregnancy vary across and within countries. However, lack of knowledge about their sexual and reproductive health and rights, poor access to and inadequate use of contraceptives resulting from restrictive laws and policies, weak programs, social and cultural norms, limited education and income, sexual violence and abuse, and unequal gender relations were identified as key factors contributing to adolescent pregnancy in LAC. The meeting participants highlighted the following seven priority actions to accelerate progress: 1. Make adolescent pregnancy, its drivers and impact, and the most affected groups more visible with disaggregated data, qualitative reports, and stories. 2. Design interventions targeting the most vulnerable groups, ensuring the approaches are adapted to their realities and address their specific challenges. 3. Engage and empower youth to contribute to the design, implementation and monitoring of strategic interventions. 4. Abandon ineffective interventions and invest resources in applying proven ones. 5. Strengthen inter-sectoral collaboration to effectively address the drivers of adolescent pregnancy in LAC. 6. Move from boutique projects to large-scale and sustainable programs. 7. Create an enabling environment for gender equality and adolescent sexual and reproductive health and rights.

Progress in reducing inequalities in reproductive, maternal, newborn,' and child health in Latin America and the Caribbean: an unfinished agenda.

OBJECTIVE: To expand the "Countdown to 2015" analyses of health inequalities beyond the 75 countries being monitored worldwide to include all countries in Latin America and the Caribbean (LAC) that have adequate data available. METHODS: Demographic and Health Surveys and Multiple Indicator Cluster Surveys were used to monitor progress in health intervention coverage and inequalities in 13 LAC countries, five of which are included in the Countdown (Bolivia, Brazil, Guatemala, Haiti, and Peru) and eight that are not (Belize, Colombia, Costa Rica, Dominican Republic, Guyana, Honduras, Nicaragua, and Suriname). The outcomes included neonatal and under-5 year mortality rates, child stunting prevalence, and the composite coverage index-a weighted average of eight indicators of coverage in reproductive, maternal, newborn, and child health. The slope index of inequality and concentration index were used to assess absolute and relative inequalities. RESULTS: The composite coverage index showed monotonic patterns over wealth quintiles, with lowest levels in the poorest quintile. Under-5 and neonatal mortality as well as stunting prevalence were highest among the poor. In most countries, intervention coverage increased, while under-5 mortality and stunting prevalence fell most rapidly among the poor, so that inequalities were reduced over time. However, Bolivia, Guatemala, Haiti, Nicaragua, and Peru still show marked inequalities. Brazil has practically eliminated inequalities in stunting. CONCLUSIONS: LAC countries presented substantial progress in terms of reducing inequalities in reproductive, maternal, newborn, and child health interventions, child mortality, and nutrition. However, the poorest 20% of the population in most countries is still lagging behind, and renewed actions are needed to improve equity.

Progress in reducing inequalities in reproductive, maternal, newborn,' and child health in Latin America and the Caribbean: an unfinished agenda / Avances en la reducción de las desigualdades en materia de salud reproductiva, materna, neonatal e infantil en América Latina y el Caribe: un programa inacabado

OBJECTIVE: To expand the "Countdown to 2015" analyses of health inequalities beyond the 75 countries being monitored worldwide to include all countries in Latin America and the Caribbean (LAC) that have adequate data available. METHODS: Demographic and Health Surveys and Multiple Indicator Cluster Surveys were used to monitor progress in health intervention coverage and inequalities in 13 LAC countries, five of which are included in the Countdown (Bolivia, Brazil, Guatemala, Haiti, and Peru) and eight that are not (Belize, Colombia, Costa Rica, Dominican Republic, Guyana, Honduras, Nicaragua, and Suriname). The outcomes included neonatal and under-5 year mortality rates, child stunting prevalence, and the composite coverage index-a weighted average of eight indicators of coverage in reproductive, maternal, newborn, and child health. The slope index of inequality and concentration index were used to assess absolute and relative inequalities. RESULTS: The composite coverage index showed monotonic patterns over wealth quintiles, with lowest levels in the poorest quintile. Under-5 and neonatal mortality as well as stunting prevalence were highest among the poor. In most countries, intervention coverage increased, while under-5 mortality and stunting prevalence fell most rapidly among the poor, so that inequalities were reduced over time. However, Bolivia, Guatemala, Haiti, Nicaragua, and Peru still show marked inequalities. Brazil has practically eliminated inequalities in stunting. CONCLUSIONS: LAC countries presented substantial progress in terms of reducing inequalities in reproductive, maternal, newborn, and child health interventions, child mortality, and nutrition. However, the poorest 20% of the population in most countries is still lagging behind, and renewed actions are needed to improve equity.

OBJETIVO: Extender los análisis de la "Cuenta Regresiva para 2015" de las desigualdades en materia de salud más allá de los 75 países sometidos a vigilancia en todo el mundo para incluir a todos los países de América Latina y el Caribe (ALC) que disponen de datos adecuados. MÉTODOS: Se utilizaron encuestas de demografía y salud y encuestas agrupadas de indicadores múltiples para vigilar el progreso de la cobertura de las intervenciones de salud y de las desigualdades en 13 países de ALC, 5 de ellos incluidos en la Cuenta Regresiva (Bolivia, Brasil, Guatemala, Haití y Perú) y 8 no incluidos (Belice, Colombia, Costa Rica, Guyana, Honduras, Nicaragua, República Dominicana y Suriname). Los resultados incluyeron las tasas de mortalidad neonatal y en menores de 5 años, la prevalencia del retraso del crecimiento en niños y el índice compuesto de cobertura (un promedio ponderado de 8 indicadores de cobertura en materia de salud reproductiva, materna, neonatal e infantil. Para evaluar las desigualdades absolutas y relativas, se emplearon el índice de desigualdad de la pendiente y el índice de concentración. RESULTADOS: El índice compuesto de cobertura mostró patrones monotónicos en función de los quintiles de riqueza, con los niveles más bajos en el quintil más pobre. La mortalidad neonatal y en menores de 5 años, así como la prevalencia del retraso del crecimiento, fueron más elevadas entre los pobres. En la mayor parte de los países aumentó la cobertura de las intervenciones, mientras que la mortalidad en menores de 5 años y la prevalencia del retraso del crecimiento disminuyeron más rápidamente entre los pobres, de manera que las desigualdades se redujeron con el transcurso del tiempo. Sin embargo, en Bolivia, Guatemala, Haití, Nicaragua y Perú aún se observan marcadas desigualdades. Brasil prácticamente ha eliminado las desigualdades en cuanto a retraso del crecimiento. CONCLUSIONES: Los países de ALC mostraron avances considerables en la reducción de las desigualdades con respecto a las intervenciones de salud reproductiva, materna, neonatal e infantil, y en materia de mortalidad y nutrición infantil. Sin embargo, el 20% más pobre de la población en la mayor parte de los países sigue quedándose a la zaga, y son necesarias iniciativas renovadas para mejorar la equidad.

Depression and diabetes treatment nonadherence: a meta-analysis.

OBJECTIVE: Depression is common in patients with diabetes and is associated with worse treatment outcomes. Its relationship to treatment adherence, however, has not been systematically reviewed. We used meta-analysis to examine the relationship between depression and treatment nonadherence in patients with type 1 and type 2 diabetes. RESEARCH DESIGN AND METHODS: We searched MEDLINE and PsycINFO databases for all studies published by June 2007 and reviewed references of published articles. Meta-analytic procedures were used to estimate the effect size r in a random effects model. Significance values, weighted effect sizes, 95% CIs, and tests of homogeneity of variance were calculated. RESULTS: Results from 47 independent samples showed that depression was significantly associated with nonadherence to the diabetes treatment regimen (z = 9.97, P < 0.0001). The weighted effect size was near the medium range (r = 0.21, 95% CI 0.17-0.25). Moderator analyses showed that the effect was significantly larger in studies that measured self-care as a continuous versus categorical variable (P = 0.001). Effect sizes were largest for missed medical appointments and composite measures of self-care (r values = 0.31, 0.29). Moderation analyses suggest that effects for most other types of self-care are also near the medium range, especially in studies with stronger methodologies. CONCLUSIONS: These findings demonstrate a significant association between depression and treatment nonadherence in patients with diabetes. Studies that used stronger methodologies had larger effects. Treatment nonadherence may represent an important pathway between depression and worse diabetes clinical outcomes.