Results of percutaneous vaginotomy in the treatment of trigger finger in Mayabeque

La tenosinovitis estenosante de los flexores de la mano o dedo en resorte es una patología que con¬duce al bloqueo de la polea de flexión proximal del dedo. Se han descrito distintos tratamientos de tipo conservador pero el tratamiento quirúrgico sigue siendo necesario en los casos en que este fracasa; necesitándose la apertura quirúrgica de la polea A1. Esto se logra por la técnica abierta convencional o por la cirugía percutánea. Como objetivo general los autores se propusieron evaluar los resultados de la cirugía percutánea Del dedo en resorte en el servicio de Ortopedia y traumatología de Mayabeque. Se realizó un estudio descriptivo prospectivo de tipo serie de casos, de noviembre 2015 a noviembre de 2016 en Mayabeque. Se aplicó   vaginotomía percutánea a 18 pacientes, que presentaron 20 dedos en resorte, Se analizó el sexo, edad, la recuperación de la función motora y las complicaciones ocurridas con esta técnica quirúrgica evaluándose los resultados según el método de Tanaka. Predomino el sexo femenino con un 89.9%. En el 75% de los dedos operados se recuperó la función motora a los 5 días, y no se mostraron complicaciones serias obteniéndose un 95 % de resultados satisfactorios. La vaginotomía percutánea solucionó satisfactoriamente la morbilidad que produce el dedo en resorte. Es un proceder seminvasivo, fácil, rápido, bien tolerado y de bajo costo que aporta una recuperación funcional óptima y un retorno inmediato a las actividades cotidianas.There are various methods to solve the stenosing tenosynovitis of the fingers of the hand, commonly known as trigger finger. This study shows the results of the application of percutaneous vaginotomy to treat this affection in Mayabeque. 18 patients that presented 20 trigger fingers were evaluated by Tanaka's method. The sex, age, the duration of the recovery of the motor function and the complications were analyzed in relation to the surgery outcome. 95 % of the results were adequate. The average times of the described variables were significantly short and did not present serious complications. Percutaneous vaginotomy satisfactorily resolved the morbidity produced by trigger finger. It is a semiinvasive, easy, fast, well-tolerated and low cost procedure that allows an optimal functional recovery and an immediate return to daily activities

SAEC-PDA: Sistema de Apoyo a la evaluación continua accesible a través de PDA

El Espacio de Educación Superior tiende a que el proceso de evaluación se realice de una manera más continua. Este tipo de evaluación suele suponer un mayor trabajo para el profesor, lo cual es una barrera para la adopción de este sistema de evaluación. Se presenta aquí un recurso docente que reduce el esfuerzo del profesor en la evaluación continua, consistente en una herramienta que permite anotar y almacenar información detallada acerca del proceso de aprendizaje. La herramienta web permite configurar unidades de evaluación cada una con sus correspondientes criterios de evaluación que pueden anotarse de manera sencilla, incluso “en directo” en el aula a través de una PDA. Además de importar y exportar listas de alumnos y generar calificaciones, también permite que los alumnos puedan consultar la evolución de sus calificaciones. De esta manera se hace una aportación que da facilidades, tanto a alumnos como a profesores, para mejorar la calidad de nuestro sistema docente y facilitar la integración del sistema universitario actual en el Espacio Europeo de Enseñanza Superior

Fibroblast response to initial attachment and proliferation on titanium and zirconium surfaces.

Introduction: In recent decades, dental implants have become one of the best options for comprehensive dental restoration; their placement is a multidisciplinary task that requires a solid understanding of biological, periodontal, surgical and prosthetic principles. Objective: The aim of this study was to quantify in vitro the adhesion and proliferation of human gingival fibroblasts’ (HGF) response on titanium (Ti) and zirconia (Zr) surfaces. Methodology: Samples of Ti and Zr were observed under atomic force microscopy (AFM). HGFs were inoculated in each sample to determine adhesion and cell proliferation. The MTT reagent was mixed with DMEM and inoculated in each plate; formazan was dissolved with dimethyl sulfoxide and analyzed at 540 nm in a microplate spectrophotometer. The test was performed with three independent experiments. Data were analyzed with Kolmogorov-Smirnov tests (Lilliefors), Kruskal-Wallis tests and Mann-Whitney test comparisons. Results: Topography of the Zr plates showed greater roughness (Ra= 0.39μm) than Ti (Ra= 0.049μm). Quantification of HGF adhesion was significantly higher (p˂0.05) in Ti, while proliferation showed no statistically significant differences between the groups. Conclusion: It is noteworthy that, even though Ti initially showed increased cell adhesion on the surface, after 24 h Zr samples showed similar proliferation; this demonstrates that both surfaces have a comparable biological response

Enhancement and Edge-Preserving Denoising: An OpenCL-Based Approach for Remote Sensing Imagery

Image enhancement and edge-preserving denoising are relevant steps before classification or other postprocessing techniques for remote sensing images. However, multisensor array systems are able to simultaneously capture several low-resolution images from the same area on different wavelengths, forming a high spatial/spectral resolution image and raising a series of new challenges. In this paper, an open computing language based parallel implementation approach is presented for near real-time enhancement based on Bayesian maximum entropy (BME), as well as an edge-preserving denoising algorithm for remote sensing imagery, which uses the local linear Stein’s unbiased risk estimate (LLSURE). BME was selected for its results on synthetic aperture radar image enhancement, whereas LLSURE has shown better noise removal properties than other commonly used methods. Within this context, image processing methods are algorithmically adapted via parallel computing techniques and efficiently implemented using CPUs and commodity graphics processing units (GPUs). Experimental results demonstrate the reduction of computational load of real-world image processing for near real-time GPU adapted implementation.ITESO, A.C

Density Functional Theory Analysis of Dichloromethane andHydrogen Interaction with Pd Clusters: First Step toSimulate Catalytic Hydrodechlorination

A density functional theory (DFT) analysis hasbeen conducted for the gas-phase hydrodechlorination (HDC) ofdichloromethane (DCM) with palladium catalyst to achieve abetter knowledge of the reaction mechanism involved in the HDCprocess, which constitutes an emerging technology for the treat-ment of organochlorinated contaminants. The computationalstudy included the effect of size, oxidation state, and spin config-uration of Pd cluster on the adsorption of H2and DCM reactantson the catalyst surface. Calculations described the activation of H2by Pd clusters through a dissociative adsorption with low enthalpy values. In addition, partially and fully dissociated DCMintermediates on Pd surface were predicted by DFT calculations. Remarkably, the dissociative adsorption of DCM on Pd active sitesoccurs via the scission of C Cl bonds, promoted by the formation of C Pd linkages, implying high adsorption enthalpy. Thecomputational results showed that DCM can be also molecularly adsorbed on both zerovalent and electrodeficient Pd species.However, the nondissociative adsorption of DCM over electrodeficient Pd cluster is remarkably favored in energy, with adsorptionenthalpies (∼ 50 kcal/mol) corresponding to chemisorption. Current theoretical evidence explained the deactivation of Pd/ACcatalyst as a consequence of the selective poisoning of electrodeficient Pd active centers by chlorinated hydrocarbons, in goodagreement with our previous experimental findingsWe are grateful to the Spanish “Ministerio de Ciencia e Innovacion”and“Comunidad de Madrid ”for financial support (CTQ2008-04751, CTQ2008-05641, and S2009/PPQ-1545). We are also very grateful to “Centro de Computacion Científica de la Universidad Aut onoma de Madrid” for computational facilitie

Allometric Equations for Estimating Biomass and Carbon Stocks in the Temperate Forests of North-Western Mexico

This paper presents new equations for estimating above-ground biomass (AGB) and biomass components of seventeen forest species in the temperate forests of northwestern Mexico. A data set corresponding to 1336 destructively sampled oak and pine trees was used to fit the models. The generalized method of moments was used to simultaneously fit systems of equations for biomass components and AGB, to ensure additivity. In addition, the carbon content of each tree component was calculated by the dry combustion method, in a TOC analyser. The results of cross-validation indicated that the fitted equations accounted for on average 91%, 82%, 83% and 76% of the observed variance in stem wood and stem bark, branch and foliage biomass, respectively, whereas the total AGB equations explained on average 93% of the total observed variance in AGB. The inclusion of total height (h) or diameter at breast height2 × total height (d2h) as a predictor in the d-only based equations systems slightly improved estimates for stem wood, stem bark and total above-ground biomass, and greatly improved the estimates produced by the branch and foliage biomass equations. The predictive power of the proposed equations is higher than that of existing models for the study area. The fitted equations were used to estimate stand level AGB stocks from data on growing stock in 429 permanent sampling plots. Three machine-learning techniques were used to model the estimated stand level AGB and carbon contents; the selected models were used to map the AGB and carbon distributions in the study area, for which mean values of respectively 129.84 Mg ha−1 and 63.80 Mg ha−1 were obtained.This study was financially supported by the Mexican National Council for Science and Technology (CONACyT) and by the State of Durango Government (Project FOMIX- DGO-2011-C01-165681)S

Reconfigurable Network for Quantum Transport Simulation

In 1981, Richard Feynman discussed the possibility of performing quantum mechanical simulations of nature. Ever since, there has been an enormous interest in using quantum mechanical systems, known as quantum simulators, to mimic specific physical systems. Hitherto, these controllable systems have been implemented on different platforms that rely on trapped atoms, superconducting circuits and photonic arrays. Unfortunately, these platforms do not seem to satisfy, at once, all desirable features of an universal simulator, namely long-lived coherence, full control of system parameters, low losses, and scalability. Here, we overcome these challenges and demonstrate robust simulation of quantum transport phenomena using a state-of-art reconfigurable electronic network. To test the robustness and precise control of our platform, we explore the ballistic propagation of a single-excitation wavefunction in an ordered lattice, and its localization due to disorder. We implement the Su-Schrieffer-Heeger model to directly observe the emergence of topologically-protected one-dimensional edge states. Furthermore, we present the realization of the so-called perfect transport protocol, a key milestone for the development of scalable quantum computing and communication. Finally, we show the first simulation of the exciton dynamics in the B800 ring of the purple bacteria LH2 complex. The high fidelity of our simulations together with the low decoherence of our device make it a robust, versatile and promising platform for the simulation of quantum transport phenomena

Pérdida de heterocigocidad en el brazo corto del cromosoma 3 humano en cáncer esporádico de pulmón

Introduction: Loss of Heterozygocity (LOH) in the short arm of human chromosome 3 (3p) is a frequent event in different types of sporadic tumors, including lung cancer (LC). Aim: To determine 3p LOH in LC samples using 17 microsatellite markers. Methodology: In a pilot study on volunteers, thirteen LC biopsies (tumor tissue) and 4 ml of blood (normal tissue) from the same patient were collected. DNA extraction and Polymerase Chain Reaction (PCR) were performed with 17 microsatellite markers to analyze LOH. Amplified fragments were run on 6% denaturalizing polyacrilamide gels and were visualized by using silver stain. Descriptive analysis was performed for each region on the 3p chromosome. Results: All tumors were informative for one or more of the analyzed markers. LOH was found in one or more loci in eleven samples (84.6%). The markers with major LOH were UBE1L (23.1%), D3S1317, D3S1300, D3S1284, D3S1274, D3S3049, and D3S1577 (15.4%). Three samples showed microsatellite instability (changes in the length of the microsatellite) in different loci. The percentages of LOH for the regions of 3p were: 17.6 % for 3p24-25, 11.62% for 3p21-22, 20% for 3p13- 14, and 18.42% for the 3p12 region. Conclusions: Chromosomal regions with allelic loss were identified where probably other GSTs involved in the development of the LC are localized. It should increases sample size and marker number in order to narrow a minimal region and to identify a unknown gene involved in LC. Introducción: La pérdida de heterocigocidad (LOH) en el brazo corto del cromosoma 3 (3p) humano es un evento frecuente en diferentes tipos de tumores esporádicos, incluyendo cáncer de pulmón (CP). Objetivo: Determinar la LOH de 3p en muestras de CP, con 17 marcadores microsatelitales. Metodología: En un estudio piloto en voluntarios, se recolectaron 13 biopsias de CP (tejido tumoral) y 4 ml de sangre periférica (tejido normal) del mismo paciente, se extrajo el ADN y se realizaron reacciones en cadena de la polimerasa (PCR) con 17 marcadores microsatelitales para analizar LOH. Los fragmentos amplificados se corrieron en geles de poliacrilamida desnaturalizante al 6% y se visualizaron por medio de la coloración de tinción de plata. El análisis descriptivo se realizó para cada región estudiada en el cromosoma 3p. Resultados: Todos los tumores fueron informativos para uno o más de los marcadores analizados. Se encontró LOH en uno o más loci en 11 muestras (84.6%). Los marcadores con mayores LOH fueron UBE1L (23.1%), D3S1317, D3S1300, D3S1284, D3S1274, D3S3049 y D3S1577 con 15.4%. Tres muestras presentaron inestabilidad microsatelital (cambios en la longitud del microsatélite) en diferentes loci. Los porcentajes de LOH para las regiones de 3p fueron: 17.6 % para 3p24-25, 11.6% para 3p21-22, 20% para 3p13-14 y 18.4% para la región 3p12. Conclusiones: Se identificaron regiones cromosómicas con pérdida alélica donde es probable que se localicen otros GST involucrados en el desarrollo de CP, diferentes de los ya identificados como VHL, RASSF1A, FHIT y DUTTI, entre otros. Se debe aumentar el número de muestras y de marcadores para delimitar una región mínima e identificar algún gen no descrito implicado en la carcinogénesis de pulmón

Guía para la caracterización de la gobernanza en paisajes rurales

Este documento contiene definiciones, procedimientos y protocolos para el diseño y ejecución de estudios de gobernanza ambiental en paisajes rurales. Se enmarca en un enfoque desarrollado el Instituto Humboldt denominado transiciones socioecológicas hacia la sostenibilidad, las cuales son entendidas como procesos de gestión de la biodiversidad basados en acuerdos entre los actores sociales con el fin de modificar las trayectorias de cambio indeseado en los ecosistemas y la sociedad. El objeto de esta guía es orientar el diseño y ejecución de estudios de gobernanza en paisajes rurales que sustenten procesos de construcción de dichos acuerdos. Para tal fin, basados en los enfoques de la gobernanza adaptativa, reflexiva, deliberativa y coproducida, se definen conceptos como sostenibilidad, justicia ambiental y equidad. Adicionalmente se presenta definiciones acerca del paisaje como categoría analítica y se presentan líneas de indagación asociadas a las cuestiones fundamentales de la gobernanza. En consecuencia con el marco conceptual, se detallan los pasos para el desarrollo de dichos estudios, incluyendo orientaciones para la formulación del problema y la pregunta de investigaciónBogotáCiencias sociales y saberes de la Biodiversida