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Introduction: Obesity is a chronic medical condition that affects, among others, the cardiovascular and respiratory systems. Interventions for its treatment focus on sustained weight reduction and general health improvement, leaving respiratory management aside. Our objective was to determine the effects of inspiratory muscle training (IMT) in patients with obesity. Methods: A systematic review was performed in Embase, Cochrane Library (CENTRAL), CINAHL, Web of Science, and PubMed/MEDLINE on June 26, 2023. Randomized clinical trials (RCTs), and quasi-randomized clinical trials investigating the effects of IMT in people with obesity were included. Selected studies were screened by two independent reviewers who extracted data and assessed the quality of the evidence. Results: The initial search returned 705 potential studies were included. Ultimately, eight studies met the criteria for eligibility and were included in the review. IMT improves physical capacity [6-minute walk test (6MWT): 44.5 m, 95% CI: 30.5 to 58.5; p < 0.0001] and the strength of the inspiratory muscles [maximal inspiratory pressure (MIP): -28.4 cm H2O, 95% CI: -41.9 to -14.8; p < 0.0001] compared to the controls, without differences in the pulmonary function, body mass index (BMI) and metabolic parameters. Conclusion: Inspiratory muscle training improves physical capacity and inspiratory muscle strength without significant changes in lung function, BMI, and metabolic parameters.Systematic review registration: PROSPERO, identifier CRD42023439625, https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42023439625.

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OBJECTIVE: To provide further knowledge about the longitudinal association between sleep duration and overweight in infants. STUDY DESIGN: The data for this study are from the CHILD-SLEEP birth cohort (n = 1679). The sleep data are based on parent-reported total sleep duration collected at 3, 8, 18, and 24 months. For a subgroup of 8-month old participants (n = 350), an actigraph recording was also made. Growth data were derived from the child health clinic records. A logistic regression model was used to study the association between sleep duration and later weight development. RESULTS: Shorter sleep duration in 3-month-old infants was cross-sectionally associated with lower weight-for-length/height (all P values ≤ .026) and body mass index (all P values ≤ .038). Moreover, short sleep duration at the age of 3 months was associated with greater weight-for-length/height z score at the age of 24 months (aOR 1.56; 95% CI 1.02-2.38) as well as with a predisposition to gain excess weight between 3 and 24 months of age (aOR 2.61; 95% CI 1.75-3.91). No significant associations were found between sleep duration at 8, 18, or 24 months and concurrent or later weight status. Actigraph-measured short night-time sleep duration at the age of 8 months was associated with greater weight-for-length at the age of 24 months (aOR 1.51; 95% CI 1.02-2.23). CONCLUSIONS: Short total sleep duration at the age of 3 months and short night-time sleep duration at the age of 8 months are associated with the risk of gaining excess weight at 24 months of age.

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ABSTRACT Studies of trophic networks and the evaluation of processes that occur along altitudinal gradients in river systems are of great importance because they allow an understanding of energy flow dynamics and provide scientific tools for the planning and management of river ecosystems. This research describes the trophic network of aquatic macroinvertebrates along an altitudinal gradient of the Gaira River, a mountain Neotropical watercourse located in the Sierra Nevada de Santa Marta in northern Colombia. The organisms were collected in the upper, middle and lower reaches of the river during the rainy and dry seasons (between 2010 and 2013). Trophic relationships were evaluated through gut content analysis. The contents were determined and quantified using photographs and expert review, and a binary consumption matrix was used to determine the characteristics of the trophic network. We characterized the diet composition at each site for each season using discriminant analysis. Trophic networks during the dry seasons showed higher trophic species richness and linkage density, and the predominance of coarse particulate organic matter (CPOM) and fine particulate organic matter (FPOM) in the high and medium sections of the river. During the dry seasons the diets had a lower number of basal species, but in the low river section there was a high percentage of fungi and microalgae. During the rainy seasons, no patterns were observed for the percentage of resources. Results indicated a direct relation between periods of hydrologic stability and an increase of CPOM during dry seasons and an increase of resource diversity consumed by macroinvertebrates at all sites during the rainy season, showing that changes in trophic networks of the Gaira River were more important during seasonal periods than along the altitudinal gradient.

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The hypothesis of this study is that muscular activity measured through surface electromyography (sEMG) is useful to estimate the work of breathing (WOB) and respiratory mechanics. Thirty-two healthy volunteers were non-invasively ventilated, and an airflow resistor was attached to the airway circuit. sEMG signals from diaphragm, intercostal and sternocleidomastoid muscles were processed and compared with WOB changes. The airway resistance was increased from a median of 9.58 to 22.51 cmH2O/L/s adding a resistance of 20 cmH2O/L/s, achieving the lower compliance too. The respiratory mechanics changes implied linear increases in WOB, with Pearson correlation of 88.43% respect to changes in resistance. Muscles increased their activity in agreement with changes of WOB, being higher the increment in diaphragm followed by sternocleidomastoid. The non-invasively monitored respiratory muscles activity allowed evaluating the changes in WOB when it depends on addition of obstructive loads, confirming that it could be used to improve the available respiratory mechanics and WOB monitoring tools.

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Resumen Introducción. Por lo general, la mecánica ventilatoria se ha estimado en modo controlado con el uso de aproximaciones no adecuadas para ventilación espontánea. Objetivo. Medir los cambios de la mecánica ventilatoria ante variaciones de la presión positiva al final de la expiración (PEEP, por su sigla en inglés) y la presión soporte (PS) en ventilación mecánica no invasiva. Materiales y métodos. A través de una estrategia no invasiva, se estimó la mecánica ventilatoria bajo diferentes niveles de PEEP y PS. Para tal fin, se utilizó un simulador mecánico y se registró una base de datos de 14 sujetos sanos conectados de manera no invasiva a un ventilador mecánico. Resultados. Se obtuvieron valores medianos de resistencia y compliancia de 91.2[77.8-135.9]mL/cmH2O y 8.3[6.1-10.4]cmH2O/L/s para los 14 sujetos sanos con PEEP y PS de 0 cmH2O, respectivamente. En los incrementos de PEEP, los sujetos presentaron aumento estadísticamente significativo en la compliancia. Por el contrario, en el incremento de presión soporte, no se observaron cambios de ningún parámetro. Conclusiones. Se encontraron valores de compliancia y resistencia, acordes con los configurados en el simulador mecánico y coherentes con los reportados en la literatura en el caso de sujetos sanos. Esto resulta de gran utilidad al tomar decisiones en unidades de cuidados intensivos.

Abstract Introduction: Traditionally, ventilatory mechanics has been delivered in controlled modes through the use of inappropriate approaches for spontaneous ventilation. Objective: To measure the changes of ventilatory mechanics caused by PEEP and pressure support (PS) variations in non-invasive mechanical ventilation. Materials and methods: The ventilatory mechanics was evaluated through a non-invasive strategy, under different PEEP and pressure support levels. For this purpose, a mechanical simulator was used, and a database of 14 healthy subjects non-invasively connected to a mechanical ventilator was recorded. Results: For the 14 healthy subjects under PEEP and pressure support conditions of 0 cmH2O, the median resistance and compliance values were 91.2 [77.8-135.9] mL/cmH2O and 8.3[6.1-10.4]cmH2O/L/s, respectively. PEEP compliance showed a statistically significant increase in all subjects. On the other hand, no changes in any of the parameters were observed regarding pressure support increase. Conclusions: The proposed technique allowed to find compliance and resistance values consistent with those set in the mechanical simulator, which, in turn, coincide with those reported in the literature for healthy subjects. This information is useful for decision-making in intensive care units.

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This paper describes various approaches to evaluating ecological risk in rivers affected by multiple chemical stressors, with emphasis on biofilm and invertebrate community responses. Metrics should be considered as different lines of evidence that, when weighted, form an advanced weight of evidence approach to establishing the environmental risk on a basin scale. Combination of field surveys to obtain observational data of communities, in situ experiments, toxicological sediment tests and a good chemical description of the medium (water and sediment) helps give an integrative view of the chemical and biological state of a river ecosystem. The greater and more distinct the variables used, the greater is our ability to identify the effects of major stressors impairing communities. Weight of evidence is an integrative methodology for tackling the challenge of determining causal relations and applying this knowledge in the decision-making processes of river management.

Este trabajo describe diferentes aproximaciones para la evaluación del riesgo ecológico en ríos afectados por múltiple contaminación química, con énfasis en la respuesta de las comunidades del biofilm e invertebrados bentónicos. Las métricas descritas se considerarían como diferentes líneas de evidencia que convenientemente ponderadas formarían un sistema de decisión (weight of evidence) para establecer el riesgo ambiental a escala de cuenca. La combinación de trabajo de campo para obtener datos de la comunidad biológica, experimentos in situ, test de exposición en sedimentos, y una buena caracterización química del medio (agua y sedimento), ayuda a tener un resultado integrado del estado biológico y químico del ecosistema fluvial. Cuantas más variables se incorporen, mejor se identificarán los efectos de las presiones químicas en el deterioro de la comunidad. Esta es una metodología integradora que permite abordar el reto de determinar las relaciones causales y aplicar este conocimiento en el proceso de toma de decisión en la gestión de las cuencas fluviales.

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En enfermedades como la hipertensión arterial con frecuencia deben utilizarse tratamientos con dos o más medicamentos, por lo cual el uso incorrecto de ellos puede conllevar a interacciones de fármacos. En el contexto de la hipertensión arterial en América Latina, existen escasos estudios evaluando la magnitud de este problema. Se realizó el presente estudio, observacional, transversal, con un muestreó censal, con el fin de establecer la ocurrencia de potenciales interacciones de fármacos en pacientes con hipertensión arterial de hospitales de 11 municipios de Risaralda, Colombia, agosto 2009 a agosto 2010, usando un algoritmo diseñado para identificar posibles interacciones de fármacos. Se obtuvieron 65.535 registros de prescripción de antihipertensivos, de 3.813 pacientes hipertensos, 28,46% correspondieron con hidroclorotiazida y 2007% enalapril, entre otros. Del total de pacientes 17,60% (IC95% 16,34%-18,82%) presentaron interacciones potenciales de fármacos, siendo la mayor en el municipio Dosquebradas (21,09%; IC95% 18,79%-23,36%). La interacción más frecuente fue enalapril-hidroclorotiazida (45,58% de los pacientes) y la de mayor riesgo y frecuencia fue enalapril-espironolactona (2,41%). estos resultados, reflejan en parte, falta de cumplimiento de normas de tratamiento de la hipertensión arterial, asi como poca implementación de conductas de tratamiento basadas en evidencia, y también posiblemente dificultades en la formación universitaria, falta de programas de educación médica continuada, falta de interés y tiempo para acceder a los alertas y reportes de nuevas condicones de uso de los medicamentos y poca instrucción y enseñanza de la medicina basada en evidencias, aspectos sobre los cuales se debe intervenir integralmente con distintos enfoques

In diseases such as hypertension, commonly treatments with two or more drugs should be used, then their incorrect use can lead to drug interactions. In the context of the hypertension in Latin America, there are few studies assessing the magnitude of this problem. Current, observational, cross-sectional and census study was made in order to establish the potential ocurrence of drug interactions in patients with hypertension from hospitals of 11 municipalities of Risaralba, Colombia, august 2009 to august 2010, using an algorithm designed to identify possible drug interactions. A total of 5.535 antihypertensive prescription records from 3.813 hypertension patients, 28.46% corresponding to hydrochlorothiazide and 20.07% to enalapril, among others, were obtained. From the total of patients 17.60% (95% CI 16.34 %-18.32%) presented potential drug interactions, being highest at the municipality Dosquebradas (21.09%; 95% CI 18.79%-23.36%). Most frequent interaction was enalapril-hydrochlorothiazide (45.58% of patients) and that of higher risk and frequency was enalapril-spironolactone (2.41%). These results, reflected in part, the lack of adherence to hypertension treatment guidelines, as well few implementation of evidenced based treatment conducts, and possibly too defficulties in the university formation, lack of continue medical education programs. Lack of interest and time to access to the alerts and reports of new conditions of drugs use and few instructions and teaching of evidence based medicine, aspects that needs tobe integrally intervened with different approaches

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Fundamento: la infección periodontal se considera como una inflamación subclínica en la que se observa asociación con niveles elevados de proteína C-reactiva y aumento en el riesgo de enfermedades sistémicas inflamatorias. Objetivo: evaluar el nivel de información de los médicos generales sobre la relación existente entre enfermedad periodontal y diabetes, y entre enfermedad periodontal y enfermedad cardiovascular. Método: se encuestaron 37 médicos generales de dos hospitales públicos de primer nivel, en dos ciudades de Colombia. En la encuesta estructurada se indagó sobre los conocimientos y prácticas habituales de los médicos en la consulta general con relación a la anamnesis, el examen clínico y las recomendaciones más frecuentes hacia los pacientes. Resultados: la mayoría de sujetos encuestados informaron conocimiento de la relación entre la enfermedad periodontal y las enfermedades cardiovasculares y diabetes, sin embargo, solamente el 37,8 % realizó algún reporte en la historia clínica del paciente mientras que el 46 % efectuó remisiones a odontología. Adicionalmente, se observó un menor conocimiento sobre la relación entre el manejo terapéutico de la diabetes y la severidad de la enfermedad periodontal, en los médicos con menos de cinco años de experiencia profesional. Conclusiones: aunque un porcentaje considerable de médicos generales informaron conocimiento acerca de la relación de la enfermedad periodontal con algunas enfermedades sistémicas, muy pocos documentaron esta información en la historia clínica del paciente evaluado.

Background: periodontal infection is considered a subclinical inflammation in which is observed association with elevated levels of C-reactive protein and increased risk of systemic inflammatory diseases. Objective: to assess the level of information of general practitioners on the relationship between periodontal disease and diabetes, and periodontal disease and cardiovascular disease. Methods: a survey was conducted to 37 general practitioners at two public hospitals of first level, in two cities from Colombia. The structured survey was asked about knowledge and usual practices of physicians in general consultation in relation to anamnesis, clinical examination and the most frequent recommendations to patients. Results: the majority of the surveyed individuals reported knowledge of the relationship between periodontal and cardiovascular disease and diabetes, however, only 37,8 % carry out a report in the patient's medical history while the 46 % made referrals to odontology. Additionally, it was observed a less knowledge about the relationship between the therapeutic management of diabetes and the severity of periodontal disease in physicians with less than five years of professional experience.Conclusions: although a significant proportion of general practitioners reported knowledge on the relationship of periodontal disease with systemic diseases, very few of them evidenced this information in the patient's medical history.

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Merkel cell carcinoma (MCC) is a rare primary cutaneous carcinoma of the skin that is highly aggressive, and has a high risk of locoregional and distant spread, a mortality rate considerably higher than that of cutaneous melanoma and poor survival. Its incidence has increased during the past twenty years. The studies published since 2008 have introduced changes in the understanding of its epidemiology and pathogenesis, and consequently the therapeutic approach. Despite this, there is still controversy surrounding its optimal management, which requires clarification. This is the purpose of this review.

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OBJECTIVE: The objective of this study was to investigate the allelic frequency of the fat mass and obesity-associated (FTO) gene (rs9939609) and its influences on obesity and metabolic risk biomarkers in a cohort of normal weight and obese Chilean children determining its ethnicity. METHODS: A total of 136 normal weight children and 238 obese children (between 6 and 11 yr old) from an urban setting were recruited for this case-control study. The children were classified as normal weight [body mass index (BMI) ≥ 5th and < 85th percentiles] or obese (BMI >95th percentile), according to the international age- and gender-specific percentiles defined by the Center for Disease Control and Prevention. The analysis of serum markers was carried out using commercial kits. The FTO polymorphism was determined through a high-resolution melting enabled real time polymerase chain reaction. Ethnicity was determined by analyzing mitochondrial DNA by the restriction fragment length polymorphism method. RESULTS: As much as 85% of the cohort was Amerindian. The minor A allele of rs9939609 was associated with obesity (odds ratio (OR): 1.422 [95% confidence interval (CI) 1.068-1.868] p = 0.015), calculated using an additive model. In sex-stratified analysis we found that the risk variant (A) of rs9939609 was associated with a higher homeostasis model of assessment for insulin (HOMA-IR) in prepubertal obese girls. In male carriers of the A allele, HOMA-IR showed no further deterioration than that already associated with obesity. CONCLUSIONS: In summary, we confirm the association of the FTO gene single-nucleotide polymorphism rs9939609 with obesity in Chilean Amerindian children. Furthermore we show an association between the risk allele (A) and insulin resistance-related markers in prepubertal obese girls.

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OBJECTIVES: To evaluate the association between endothelial activation markers in the maternal circulation with nitric oxide (NO) synthesis in human umbilical endothelial cells. STUDY DESIGN: This is a case-control study of normal and pre-eclamptic pregnancies. The levels of sE-selectin, soluble vascular cell adhesion molecule 1 (sVCAM-1), and soluble fms-like tyrosine kinase 1 (sFlt-1) were measured by enzyme-linked immunosorbent assay, and histamine-induced NO synthesis was detected by fluorometric examination of the human umbilical vein endothelial cells (HUVECs) isolated from normal and pathological pregnancies. RESULTS: Mothers with severe pre-eclamptic pregnancies have premature and smaller babies than mothers with normal pregnancies (P < 0.05); they also have high maternal plasma levels of sVCAM-1 (∼2-fold), sFlt-1 (∼2.5-fold), and lower (∼70%) histamine-stimulated NO synthesis in HUVECs. A positive relationship between systolic blood pressure (SBP) and plasma levels of sE-selectin, sVCAM-1, and sFlt-1 was demonstrated. Moreover, levels of sE-selectin, sVCAM-1, and sFlt-1 were negatively associated with newborn weight (NBW), gestational age at delivery, and NO synthesis. Women with high E-selectin (>63 ng/ml), VCAM-1 (>752 ng/ml), and sFlt-1 (>15204 pg/ml) showed high risk (∼2-fold) for preterm delivery and very preterm delivery, or fetal weight <1500 g (∼1.5-fold) compared with women with low levels. CONCLUSIONS: High circulating levels of maternal endothelial dysfunction markers present in pre-eclampsia are associated with decreased NO synthesis in fetal endothelium.

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El hígado puede estar comprometido por el virus de inmunodeficiencia humana (VIH), tanto durante el período de la primoinfección como en la etapa avanzada de la enfermedad. Objetivo: el objetivo del presente trabajo fue determinar los hallazgos histológicos en biopsias hepáticas de pacientes con SIDA, hospitalizados en el Hospital Universitario de Caracas. Materiales y Métodos: se incluyeron 21 pacientes a quienes se les realizaron biopsias hepáticas entre marzo de 2001 y marzo de 2006, los datos clínicos fueron tomados de los registros de historias médicas. A todas las biopsias se les realizaron coloraciones especiales y fueron analizadas por patólogos con experiencia en patología hepática. Resultados: los pacientes estaban conformados por 16 del sexo masculino y 5 del sexo femenino con edades comprendidas entre 63-25 años. De las 21 biopsias se reportaron los hallazgos en 18. Entre éstos tenemos: 10 con hepatitis granulomatosa, 2 con esteatosis hepática, 1 hepatitis crónica por virus B, 1 esteatohepatitis, 1 linfoma no Hodgkin, 1 histoplasmosis, 1 hepatotoxicidad y 1 no concluyente. No hubo diferencias estadísticamente significativas al comparar el diagnóstico clínico con los hallazgos anatomopatológicos. conclusión: en nuestro estudio el hallazgo más frecuente fue la hepatitis granulomatosa. En algunos casos, la biopsia confirmó la sospecha clínica y en la mayoría de los estudios la indicación fue alteración del perfil hepático. Nosotros recomendamos la realización de la biopsia en aquellos pacientes en quienes los hallazgos clínicos y exámenes menos invasivos no hayan ayudado en el diagnóstico.

The liver can be frequently a target of the virus of acquired immunodeficiency syndrome (HIV), during the first infection period as in advanced stages of the disease. Aim: The objective of the present study was to determine the histological findings in hepatic biopsies of patient with AIDS hospitalized in our centre. Materials and Methods: 21 patients were included who had a hepatic biopsy taken between March 2001 and March 2006; the clinical data were taken from the registries of medical files. All specimens were treated with special colorations and were analyzed by pathologists with experience in hepathology. Results: There were 16 male patients and 5 female, with ages ranging between 63-25 years old. Of the 21 biopsies the findings were reported in 18, 10 had granulomatous hepatitis, 2 hepatic steatosis, 1 chronic hepatitis by virus B, 1 steatohepatitis, 1 non Hodgkin lymphoma, 1 histoplasmosis, 1 hepatotoxicity and 1 was not conclusive. Conclusion: In our study the most frequent finding was granulomatous hepatitis, the biopsy confirmed in some cases the clinical suspicion and in most of the cases the indication was an alteration in the laboratory hepatic profile. We recommend a liver biopsy to be performed in those patients where clinical findings and less invasive tests have not helped to come to a definite diagnosis.

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Se realiza una revisión completa y actualizada de las características ecográficas de las lesiones benignas, malignas, cáncer de mama, clasificación ecogr fica según la terminología BI-RADS (Breast Imaging Reporting and Data System), Doppler del Cáncer de mama, tridimensional (3D), metástasis ganglionar, ecografía como método de screening y biopsia de lesiones de mama mediante guía ecográfica. La revisi¢n pretende brindar pautas que nos permitan determinar con mayor exactitud el cáncer de mama.En los últimos años la ecografía de mama, gracias al avance tecnológico de transductores de alta resolución lateral, imágenes armónicas, Doppler color, vistas panorámicas, uso de ecorrealzadores, tridimensionales, ha llegado a ser el examen de imagen más importante en la evaluaci¢n complementaria a la mamografía de las lesiones mamarias y en muchos casos (mujeres con mamas densas, en menores de 35 años y en gestantes) es el examen de primera línea, con mayor sensibilidad y especificidad.

An updated and complete review is performed on the ultrasound findings of malignant and benign injuries, breast cancer, an ultrasound classification according to the BI-RADS terminology (Breast Imaging Reporting and Data System), Doppler Color, three-dimensional (3D) breast cancer, lymph node metastasis, ultrasound as a screening approach and biopsy of breast injuries by means of an ultrasound guide. The review tries to provide guidelines that will let us determine breast cancer but with more accuracy.In the last couple of years, breast ultrasound thanks in part to the use of technologically advance of the high resolution lateral transducers, harmonic imaging, color Doppler, panoramic view, the use of ultrasound contrast enhancement, three-dimensional, has become the most important imaging test with regards to the complementary mammography evaluation of breast injuries and in most cases (women with dense breast, under the age of 35 and pregnant women) it’s the top leading test that has greater sensivity an specificity.

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En los últimos años, la ecografía de mama, gracias al avance tecnológico de transductores de alta resolución lateral, imágenes armónicas, Doppler color, vistas panorámicas, uso de ecorrealzadores, tridimensionales, ha llegado a ser el examen de imágenes más importante en la evaluación complementaria a la mamografía de las lesiones mamarias y en muchos casos (mujeres con mamas densas, en menores de 35 años y en gestantes) es el examen de primera línea, con mayor sensibilidad y especificidad. Se realiza una revisión de las características ecográficas de las lesiones benignas, malignas y cáncer de mama; la clasificación ecográfica según la terminología bí-rads (breast imaging reporting and data system); Doppler del cáncer de mama, tridimensional (3D), metástasis ganglionar; ecografía como método de descarte y biopsia de lesiones de mama mediante guía ecográfica.

In the last few years, thanks to high resolution lateral transducers advanced technology, harmonic imaging, color Doppler, panoramic vision, ultrasound contrast enhancement, three dimension, breast ultrasound has become the most important imaging test complementary to mammography on breast lesions evaluation and in many cases (dense breasts, age below 35, and pregnancy) is the first line test with higher sensitivity and specificity. An updated review is performed on ultrasound findings of malignant and benign lesions and breast cancer, the bi-rads ultrasound classification (breast imaging reporting and data system), Doppler color, third-dimension (3D), Iymph node metastasis, ultrasound screening approach and breast lesions biopsy with ultrasound guide.

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