Restricción de flujo sanguíneo en la rehabilitación del ligamento cruzado anterior

Introducción: La rotura del ligamento cruzado anterior provoca atrofia y pérdida de fuerza, por lo que resulta necesaria una rehabilitación precoz y adecuada. El entrenamiento mediante restricción de flujo sanguíneo parece ser una herramienta segura y efectiva para la ganancia de fuerza y masa muscular en sujetos sanos y en población clínica. Objetivo: Evaluar el efecto de la rehabilitación con restricción de flujo sanguíneo sobre la fuerza, la masa muscular y la intensidad del dolor en pacientes con reconstrucción del ligamento cruzado anterior. Métodos: Se realizó la búsqueda de artículos en tres bases de datos, mediante una combinación de términos relativos a la restricción de flujo sanguíneo y rehabilitación del ligamento cruzado anterior. Los estudios seleccionados evaluaron la fuerza, la masa muscular y el dolor. La mayoría de ellos refieren efectos positivos en el uso de la restricción del flujo sanguíneo. Conclusiones: El entrenamiento con restricción de flujo sanguíneo durante la rehabilitación temprana en la reconstrucción del ligamento cruzado anterior puede ser una alternativa para mejorar la fuerza y aumentar la masa muscular. Se equipara al entrenamiento con cargas altas; además, reduce el dolor y el estrés mecánico sobre la articulación de la rodilla.

Introduction: Anterior cruciate ligament rupture causes atrophy and loss of strength, which is why early and adequate rehabilitation is needed. Blood flow restriction training is a safe and effective tool for gaining strength and muscle mass in healthy subjects and in the clinical population. Objective: To evaluate the effect of rehabilitation with blood flow restriction on strength, muscle mass, and pain intensity in patients with anterior cruciate ligament reconstruction. Methods: Three databases were searched for articles using a combination of terms related to blood flow restriction and anterior cruciate ligament rehabilitation. Selected studies assessed strength, muscle mass, and pain. Most of them report positive effects in the use of blood flow restriction. Conclusions: Blood flow restriction training during early rehabilitation in anterior cruciate ligament reconstruction may be an alternative to improve strength and increase muscle mass. It is equated to training with high loads; it also reduces pain and mechanical stress on the knee joint.

Kinesiotaping in discopathies and degenerative spinal diseases: systematic review / Kinesiotaping em discopatias e doenças degenerativas da coluna vertebral: revisão sistemática / Kinesiotaping en discopatías y enfermedades degenerativas de la columna vertebral: revisión sistemática

ABSTRACT Neuromuscular taping or kinesiotaping is a technique widely used in spinal disorders. However, the scientific evidence of its use in discopathies and degenerative spine pathology is unknown. This study aimed to analyze the published clinical trials on neuromuscular taping in subjects with discopathies and degenerative spinal injuries. For this purpose, a literature search was performed following PRISMA guidelines in the following databases: PubMed, Web of Science (WOS), Scopus, Medline, and Cinahl. In analyzing bias and methodological quality, we used: the PEDro scale, Van Tulder criteria, and risk of bias analysis of the Cochrane Collaboration. A total of 5 articles were included that obtained a mean score of 6.2 on the PEDro scale. There is moderate evidence that, in the short term, neuromuscular taping reduces analgesic consumption and improves the range of motion and muscle strength in the posterior musculature. In addition, there is limited evidence that it can improve quality, while the scientific evidence on the effect of neuromuscular taping on pain is contradictory. The application of neuromuscular taping on discopathies and degenerative processes of the spine should be cautiously undertaken until more conclusive results are obtained, and the long-term effects are assessed. Level of evidence I; Systematic review.

Resumo: A bandagem neuromuscular ou kinesiotaping é uma técnica de bandagem amplamente utilizada em distúrbios da coluna vertebral. Entretanto, a evidência científica para seu uso em discopatias e na patologia degenerativa da coluna são desconhecidas. Objetivo: O objetivo deste trabalho foi analisar ensaios clínicos publicados sobre bandagem neuromuscular em sujeitos com discopatias e lesões degenerativas da coluna vertebral. Para este fim, foi realizada uma pesquisa bibliográfica seguindo as diretrizes do PRISMA nas seguintes bases de dados: PubMed, Web of Science (WOS), Scopus, Medline e Cinahl. Na análise de viés e qualidade metodológica, foram utilizados: escala PEDro, critérios de Van Tulder e análise de risco de viés da Colaboração Cochrane. Um total de 5 artigos foi incluído com uma pontuação média de 6,2 na escala PEDro. Há evidências moderadas de que, a curto prazo, a bandagem neuromuscular reduz o consumo de analgésicos, melhora a amplitude de movimento e a força muscular na musculatura posterior. Além disso, há evidências limitadas de que pode melhorar a qualidade, enquanto as evidências científicas sobre o efeito da bandagem neuromuscular na dor são contraditórias. A aplicação da bandagem neuromuscular em discopatias e processos degenerativos da coluna vertebral deve ser feita com cautela até que resultados mais conclusivos sejam obtidos e os efeitos a longo prazo sejam avaliados. Nível de evidência I; Revisão sistemática.

Resumen: El vendaje neuromuscular o kinesiotaping es una técnica de vendaje que se utiliza ampliamente en trastornos raquídeos. Sin embargo, se desconoce la evidencia científica de uso en discopatías y patología degenerativa de la columna. El objetivo de este trabajo consistió en analizar los ensayos clínicos publicados sobre el vendaje neuromuscular en sujetos con discopatías y lesiones degenerativas del raquis. Para ello, se realizó una búsqueda bibliográfica siguiendo las directrices PRISMA en las siguientes bases de datos: PubMed, Web of Science (WOS), Scopus, Medline y Cinahl. En el análisis de sesgo y calidad metodológica se utilizaron: escala PEDro, criterios de Van Tulder y análisis del riesgo de sesgo de la Colaboración Cochrane. Se incluyeron un total de 5 artículos que obtuvieron una puntuación media de 6,2 en la escala PEDro. Existe evidencia moderada de que, a corto plazo, el vendaje neuromuscular reduce el consumo de analgésicos, mejora el rango de movimiento y fuerza muscular en la musculatura posterior. Además, existe evidencia limitada de que puede mejorar la calidad, mientras que la evidencia científica sobre el efecto del vendaje neuromuscular en el dolor es contradictoria. La aplicación de vendaje neuromuscular es discopatías y procesos degenerativos del raquis debe realizarse con cautela a la espera de que se obtengan resultados más concluyentes y se valoren los efectos a largo plazo. Nivel de evidencia I; Revisión sistemática.

Nonlinear effects in Thomas precession due to the interplay of Lorentz contraction and Thomas-Wigner rotation.

It is demonstrated that the 3-vector [Formula: see text] currently associated to the spin in an inertial frame does not contract, but rather dilates, in the direction of the velocity. The correct vector [Formula: see text] is individuated. The equation of motion for the two vectors is shown to contain two terms, a common linear rotation, identified with Thomas precession, and also a nonlinear rotation depending on the direction of the spin itself.

Effect of the maitland concept techniques on low back pain: a systematic review / Efeito das técnicas do conceito maitland na dor lombar: revisão sistemática / Efecto de las técnicas del concepto maitland en la lumbalgia: revisión sistemática

ABSTRACT Low back pain has a prevalence that reaches up to 70% of the population between 35-55 years of age and is the principal cause of occupational disability. The scientific evidence on the effect of manual therapy on low back pain is conflicting and there are no specific reviews on the Maitland concept of manual therapy. Therefore, the objective of this systematic review is to analyze the effect of the techniques of the Maitland concept of manual therapy in patients with low back pain and/or determine the level of scientific evidence.For this, a search was carried out in the Cinahl, Medline, Web of Science, PubMed and Scopus databases during the months of January and February 2021 and it was updated in August 2021. In the search, 894 records were obtained, of which 15 randomized clinical trials that obtained a minimum of 3 points out of 5 on the Jadad scale were included.The main results in the current scientific literature suggest that there is solid evidence that the manipulations and mobilizations described in the Maitland Concept, applied alone or in combination with other interventions, reduce pain and disability in subjects with low back pain.The effects on musculature are contradictory. Exercise and patient education increase the effect of manual therapy. Future research requires analyzing whether the effects are preserved in the long term and more homogeneous treatment protocols are needed to determine a prescriptive guideline for manual therapy. Level of evidence I; Systematic review.

RESUMO: A dor lombar tem uma prevalência que atinge até 70% da população entre 35-55 anos e é a principal causa de incapacidade ocupacional. As evidências científicas sobre o efeito da terapia manual na dor lombar são conflitantes e não há revisões específicas sobre o conceito de terapia manual de Maitland. Portanto, o objetivo desta revisão sistemática é analisar o efeito das técnicas do conceito Maitland de terapia manual em pacientes com lombalgia e/ou determinar o nível de evidência científica.Para isso, foi realizada uma busca nas bases de dados Cinahl, Medline, Web of Science, Pubmed e Scopus durante os meses de janeiro e fevereiro de 2021 e foi atualizada em agosto de 2021. Na busca foram obtidos 894 registros dos quais foram incluídos 15 ensaios clínicos randomizados que obtiveram um mínimo de 3 pontos em 5 na escala de Jadad. Os principais resultados na literatura científica atual sugerem que há evidências sólidas de que as manipulações e mobilizações descritas no conceito de Maitland, aplicadas isoladamente ou em combinação com outras intervenções, reduzem a dor e a incapacidade em indivíduos com dor lombar. Os efeitos nos músculos são contraditórios. O efeito da terapia manual é aumentado quando combinada com exercícios e educação do paciente. Pesquisas futuras requerem analisar se os efeitos são preservados em longo prazo e protocolos de tratamento mais homogêneos são necessários para determinar uma diretriz prescritiva para a terapia manual. Nível de evidência I; Revisão sistemática.

RESUMEN: La lumbalgia tiene una prevalencia que alcanza hasta el 70% de la población entre los 35-55 años y es la primera causa de discapacidad laboral. La evidencia científica sobre el efecto de la terapia manual en la lumbalgia es contradictoria y no existen revisiones específicas sobre el concepto Maitland de terapia manual. Por tanto, el objetivo de esta revisión sistemática consiste en analizar el efecto de las técnicas del concepto Maitland de terapia manual en pacientes con lumbalgia y o determinar el nivel de evidencia científica.Para ello se llevó a cabo una búsqueda en las bases de datos Cinahl, Medline, Web of Science, PubMed e Scopus durante los meses de enero y febrero de 2021 y se actualizó en agosto de 2021. En la búsqueda se obtuvieron un total de 894 registros de los cuales fueron incluidos 15 ensayos clínicos aleatorizados que obtuvieron un mínimo de 3 puntos sobre 5 en la escala de Jadad. Los principales resultadosen la literatura científica actual sugieren que existe evidencia sólida de que las manipulaciones y movilizaciones descritas en el concepto Maitland, aplicadas de forma aislada o en combinación con otras intervenciones, disminuyen el dolor y la discapacidad en sujetos con lumbalgia. Los efectos sobre la musculatura son contradictorios. El efecto de la terapia manual se ve incrementado cuando se combina con ejercicio y educación del paciente. Futuras investigaciones requieren analizar si los efectos se preservan largo plazo y se necesitan protocolos de tratamiento más homogéneos para determinar una pauta prescriptiva de terapia manual. Nivel de evidencia I; Revisión sistemática.

Evaluation of sucrose-enriched diet consumption in the development of risk factors associated to type 2 diabetes, atherosclerosis and non-alcoholic fatty liver disease in a murine model.

Overconsumption of sucrose, the main contributor of the total added sugar intake in the world, has been associated with negative metabolic effects related to non-communicable diseases. However, this relationship continues to be a controversial topic and further studies are needed. The aim of this study was to evaluate the sucrose-enriched diet consumption in the development of risk factors associated with type 2 diabetes, atherosclerosis and non-alcoholic fatty liver disease in a murine model. Sucrose-enriched diet-fed rats showed a decrease in food, lipids and protein intake as well as in serum total cholesterol levels, an increase in carbohydrates intake, glucose, insulin, triglycerides, VLDL-c and HDL-c levels and a greater degree of insulin resistance, steatosis and non-alcoholic steatohepatitis. Our results show that sucrose-enriched diet consumption during 25 weeks contribute to the development of risk factors associated with type 2 diabetes, atherosclerosis and non-alcoholic fatty liver disease in male Wistar rats.

Propuesta de un modelo integral de accountability para la educación superior en Chile / Proposal of an integral model of accountability for higher education in Chile

Resumen: Depositarías de la confianza de la ciudadanía y del Estado, las instituciones de educación superior han desarrollado su misión de formación e investigación dentro de un contexto acotado. En la actualidad, hay una demanda de parte del Estado y la ciudadanía de una mayor participación y supervisión del sistema de educación superior, para la mejora de la calidad de la educación impartida, de una parte, y, de otra, para dar cuenta de los recursos públicos invertidos en educación superior. En este contexto, este trabajo propone un modelo integral de rendición de cuentas para la educación superior en Chile. Su objetivo es proponer dicho modelo como herramienta de evaluación de las políticas públicas en educación superior, para que esta contribuya productivamente a las actividades económicas del país. Como pondremos de manifiesto en el trabajo, la rendición de cuentas no sólo se limita al aspecto financiero, sino que incorpora muchas otros aspectos tales como la autoridad y gobierno, la responsabilidad social, la democracia y la participación, la probidad y la transparencia informativa, la política y la ética, entre otras.

Abstract: Depositary trust of citizens and the state, higher education institu tions have developed their mission training and research within a limited context. At present, there is a demand from the state and citizens of increased participation and supervision system of higher education, to improve the quality of education provided in one hand and another to account for public funds invested in higher educa tion. In this context, this paper proposes a comprehensive model of accountability for higher education in Chile. Its purpose is to propose such a model as a tool for assessing public policies in higher educa tion, for higher education to contribute productively to the eco nomic activities of the country. As we will show at work, account ability is not only limited to the financial aspect, but incorporates many other aspects such as the authority and governance, social responsibility, democracy and participation, probity and transpar ency of information, politics and ethics, among others.

Effects of two sources of Mexican oregano oil on performance, blood profile, carcass variables, and meat of broilers

The current study was conducted to investigate the effects of Mexican oregano essential oil (MOO) extracts from Lippia berlandieri Schauer (LBS) and Poliomintha longiflora Gray (PLG) on performance, blood profiles, carcass variables, and meat composition of broilers at slaugther. A total of 360 one-day-old Ross broilers were randomly distributed into four dietary treatments with six replicate pens per treatment and 15 birds per pen. The dietary treatments were: a basal diet (control), control + 0.40 g of LBS/kg of feed, control + 0.40 g of PLG/kg, and control + 0.40 g of LBS/kg + 0.40 g of PLG/kg. Results showed that linear, quadratic, and cubic effects of days were significant in the performance variables of broilers. The treatments with LBS and PLG maintained the broiler body weight without increasing feed intake and water intake when compared with the control group. Broilers given LBS+PLG and PLG had increased blood leukocytes, lymphocytes, low-density lipoprotein, and hot carcass yields. In meat composition, treatments with PLG and LBS+PLG presented similar breast protein content compared with the control treatment. Supplementation with these two MOO exhibits positive effects on broiler performance, blood profiles, carcass traits, and meat composition. These two MOO may be promising feed supplements as growth promoters and enhancers of meat quality in broiler production.(AU)

Sequential measurement of conjugate variables as an alternative quantum state tomography.

It is shown how it is possible to reconstruct the initial state of a one-dimensional system by sequentially measuring two conjugate variables. The procedure relies on the quasicharacteristic function, the Fourier transform of the Wigner quasiprobability. The proper characteristic function obtained by Fourier transforming the experimentally accessible joint probability of observing "position" then "momentum" (or vice versa) can be expressed as a product of the quasicharacteristic function of the two detectors and that unknown of the quantum system. This allows state reconstruction through the sequence (1) data collection, (2) Fourier transform, (3) algebraic operation, and (4) inverse Fourier transform. The strength of the measurement should be intermediate for the procedure to work.

Correlations between detectors allow violation of the Heisenberg noise-disturbance principle for position and momentum measurements.

Heisenberg formulated a noise-disturbance principle stating that there is a tradeoff between noise and disturbance when a measurement of position and a measurement of momentum are performed sequentially, and another principle imposing a limitation on the product of the uncertainties in a joint measurement of position and momentum. We prove that the former, the Heisenberg sequential noise-disturbance principle, holds when the detectors are assumed to be initially uncorrelated from each other, but that it can be violated for some properly correlated initial preparations of the detectors.

[Microalbuminuria and associated cardiovascular risk factors in patients with arterial systemic hypertension. A subanalysis of the I-Search study]. / Microalbuminuria y factores de riesgo cardiovascular asociados en pacientes con hipertensión arterial sistémica. Subanálisis del estudio I-Search.

OBJECTIVES: To establish the prevalence of microalbuminuria in a group of patients with systemic arterial hypertension (SAH) to analyze the association between this parameter and cardiovascular risk factors as well as with SAH treatment. METHODS: This is a sub-analysis of 564 patients of Mexico, extracted from an international, observational, and cross-sectional study followed by specialists, The study included patients with SAH without any other causes of microalbuminuria. RESULTS: Microalbuminuria in these patients had a prevalence of 63.8% (95% IC 58.4, 69,3) and correlated with a wide variety of risk factors and concomitant cardiovascular diseases Most patients with microalbuminuria already received treatment with angiotensin II receptor antagonists (50%), without pretending to establish the impact of the drugs on the microalbuminuria values. CONCLUSION: The prevalence of patients with SAH and high cardiovascular risk is high in this study and justifies their management and care with multifactorial strategies aimed to adequately control their blood pressure and to modify other current cardiovascular risk factors.

Microalbuminuria y factores de riesgo cardiovascular asociados en pacientes con hipertensión arterial sistémica. Subanálisis del estudio I-Search / Microalbuminuria and associated cardiovascular risk factors in patients with arterial systemic hypertension. A subanalysis of the I-Search study

Objetivo: Establecer la prevalencia de microalbuminuria en un grupo de pacientes con hipertensión arterial sistémica (HAS), para analizar la asociación entre este parámetro con factores de riesgo cardiovascular y el tratamiento para la HAS. Método: Es un sub-análisis con 564 pacientes de México, extraído de un estudio internacional, observacional y transversal seguidos por médicos especialistas. Se incluyeron pacientes con HAS, sin otras causas de microalbuminuria. Resultados: La microalbuminuria en estos pacientes tuvo una prevalencia de 63.8% (95% IC 58.4, 69.3) y correlaciona con una amplia variedad de factores de riesgo y enfermedades cardiovasculares concomitantes. La mayor parte de pacientes con microalbuminuria recibían ya tratamiento con antagonistas de los receptores de angiotensina II (50%), sin pretender establecer el impacto de los fármacos en los valores de microalbuminuria. Conclusiones:La prevalencia de pacientes con HAS y elevado riesgo cardiovascular es alta. Debido a ello, se justifica un tratamiento multifactorial capaz no sólo de controlar la presión arterial sino también de modificar los demás factores de riesgo cardiovascular presentes.

Objectives: To establish the prevalence of microalbuminuria in a group of patients with systemic arterial hypertension (SAH) to analyze the association between this parameter and cardiovascular risk factors as well as with SAH treatment. Methods: This is a sub-analysis of 564 patients of Mexico, extracted from an international, observational, and cross-sectional study followed by specialists, The study included patients with SAH without any other causes of microalbuminuria. Results: Microalbuminuria in these patients had a prevalence of 63.8% (95% IC 58.4, 69,3) and correlated with a wide variety of risk factors and concomitant cardiovascular diseases Most patients with microalbuminuria already received treatment with angiotensin II receptor antagonists (50%), without pretending to establish the impact of the drugs on the microalbuminuria values. Conclusion: The prevalence of patients with SAH and high cardiovascular risk is high in this study and justifies their management and care with multifactorial strategies aimed to adequately control their blood pressure and to modify other current cardiovascular risk factors.