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Electrocauterización de la membrana de Bowman para el tratamiento de la queratopatía bullosa dolorosa
Escalona Leyva,Elizabeth; Casas Arias,Xiomara;
Revista Cubana de Oftalmolog?-a , 2002,
Abstract: the purpose of this paper is to evaluate the electrocauterization of bowman's membrane as a surgical alternative in the treatment of painful bullous keratopathy. 30 eyes from 30 patients who were diagnosed painful bullous keratopathy and had not improved with the habitual treatments were studied. age, sex, ethiology, time of evolution, epithelialization, complications and the symptomatic relief were taken as fundamental variables. data were manually tabulated, taking into account the number of patients. the psotsurgical bullous keratopathy (aphakic y pseudophakic) prevailed in 83.3 % of the patients. the most affected were those over 60 (63.3 %). no significant differences were found in relation to sex. the time of epithelialization was from 7 to 14 days in 93.3 % of the patients and complications were not severe and were only observed in 14 %. the relief of the symptoms was observed in 66.6 % during the first week of the postoperative. the electrocauterization of bowman's membrane is an efficient and simple method with satisfactory results in the treatment of painful bullous keratopathy
Electrocauterización de la membrana de Bowman para el tratamiento de la queratopatía bullosa dolorosa Electrocauterization of Bowman's membrane for the treatment of painful bullous keratopathy
Elizabeth Escalona Leyva,Xiomara Casas Arias
Revista Cubana de Oftalmolog?-a , 2002,
Abstract: El propósito en este trabajo es evaluar la electrocauterización de la membrana de Bowman como alternativa quirúrgica en el tratamiento de la queratopatía bullosa dolorosa. Se estudiaron 30 ojos de 30 pacientes con diagnóstico de queratopatía bullosa dolorosa que no habían logrado mejoría con los tratamientos habituales. Se tomaron como variables fundamentales la edad, el sexo, la etiología, el tiempo de evolución, la epitelización, las complicaciones y el alivio sintomático, los datos se tabularon de forma manual teniendo en cuenta el universo de pacientes. Predominó la queratopatía bullosa posquirúrgica (afáquicas y pseudofáquicas) en el 83,3 % de los pacientes. Las edades más afectadas fueron los mayores de 60 a os (63,3 %); no se encontraron diferencias significativas en cuanto al sexo. El tiempo de epitelización fue de 7 a 14 días en el 93,3 % de los pacientes y solo se encontraron complicaciones en el 14 % que no fueron de gravedad. El alivio de los síntomas se produjo en el 66,6 % en la primera semana del posoperatorio. La electrocauterización de la membrana de Bowman constituye un método eficaz, sencillo y con resultados satisfactorios en el tratamiento de la queratopatía bullosa dolorosa The purpose of this paper is to evaluate the electrocauterization of Bowman's membrane as a surgical alternative in the treatment of painful bullous keratopathy. 30 eyes from 30 patients who were diagnosed painful bullous keratopathy and had not improved with the habitual treatments were studied. Age, sex, ethiology, time of evolution, epithelialization, complications and the symptomatic relief were taken as fundamental variables. Data were manually tabulated, taking into account the number of patients. The psotsurgical bullous keratopathy (aphakic y pseudophakic) prevailed in 83.3 % of the patients. The most affected were those over 60 (63.3 %). No significant differences were found in relation to sex. The time of epithelialization was from 7 to 14 days in 93.3 % of the patients and complications were not severe and were only observed in 14 %. The relief of the symptoms was observed in 66.6 % during the first week of the postoperative. The electrocauterization of Bowman's membrane is an efficient and simple method with satisfactory results in the treatment of painful bullous keratopathy
Indicaciones clínicas de las lentillas terapéuticas: Estudio preliminar
Vega Quiroga,Belkis; Casas Arias,Xiomara; López Hernández,Silvia; Vigoa Aranguren,Lázaro;
Revista Cubana de Oftalmolog?-a , 2000,
Abstract: in order to make known the indications and use of the therapeutic soft contact lens, which is another advance in the treatment of corneal diseases, 31 soft contact lens were used as a protective dressing in 23 patients affected by different ophthalmological affections, such as: primary epithelial diseases, traumatic epithelial affections, immunological diseases and dry eye, viral diseases, endothelial decompensation and with cosmetic and refractives ends. a marked decrease of the functional symptoms and an increase of the cicatrization of wounds, ulcers, etc., as well as an aesthetic and optic improvement were attained in these cases. a previous ophthalmologic evaluation of the patient was made taking into account the type of affection, keratometry, examination with slit lamp, visual acuity before placing the therapeutic lens and subjective symptoms. the patients were followed-up at the contactology department at 24 hours, at 7 days and every 21 days.the soft contact lens wear time oscillated between 8 and 60 weeks. there were no severe complications. the visual acuity improved in 7 cases
Indicaciones clínicas de las lentillas terapéuticas: Estudio preliminar Clinical indications of the therapeutic lens: Preliminary study
Belkis Vega Quiroga,Xiomara Casas Arias,Silvia López Hernández,Lázaro Vigoa Aranguren
Revista Cubana de Oftalmolog?-a , 2000,
Abstract: Con la finalidad de dar a conocer las indicaciones y el empleo de los lentes de contacto blandos terapéuticos, lo cual constituye un avance más en el tratamiento de las enfermedades corneales, se utilizaron 31 lentes de contacto blandos, como apósito protector en 23 pacientes afectados por diferentes afecciones oftalmológicas, como son: enfermedades epiteliales primarias, afecciones epiteliales traumáticas, enfermedades inmunológicas y ojo seco, enfermedades virales, descompensación endotelial y con fines cosméticos y refractivos. Se consiguió disminución marcada de los síntomas funcionales y aumento de la cicatrización de heridas, úlceras, etc., en estos casos, así como la mejoría estética y óptica. Se hizo una valoración oftalmológica previa del paciente en cuanto a: afección que presenta, queratometría, examen en lámpara de hendidura, agudeza visual antes de colocar el lente terapéutico, síntomas subjetivos, después se siguieron en consulta de contactología a las 24 h, a los 7 días y cada 21 días. El tiempo de uso del lente de contacto blando osciló entre 8 y 60 semanas. No se observó ninguna complicación grave. La AV mejoró en siete casos In order to make known the indications and use of the therapeutic soft contact lens, which is another advance in the treatment of corneal diseases, 31 soft contact lens were used as a protective dressing in 23 patients affected by different ophthalmological affections, such as: primary epithelial diseases, traumatic epithelial affections, immunological diseases and dry eye, viral diseases, endothelial decompensation and with cosmetic and refractives ends. A marked decrease of the functional symptoms and an increase of the cicatrization of wounds, ulcers, etc., as well as an aesthetic and optic improvement were attained in these cases. A previous ophthalmologic evaluation of the patient was made taking into account the type of affection, keratometry, examination with slit lamp, visual acuity before placing the therapeutic lens and subjective symptoms. The patients were followed-up at the Contactology Department at 24 hours, at 7 days and every 21 days.The soft contact lens wear time oscillated between 8 and 60 weeks. There were no severe complications. The visual acuity improved in 7 cases
Electrospun PLLA Membranes for Caffeine Delivery: Diffusional Approach  [PDF]
Ana Paula S. Immich, José Antonio Tornero, Francesc Cano Casas, Manuel J. Lis Arias
Journal of Biomedical Science and Engineering (JBiSE) , 2017, DOI: 10.4236/jbise.2017.1012042
Abstract: One of the great advantages of electrospun fibers is the large tridimensional area produced, capable of storing any type of material. The aim of our investigation is to study the electrospinning technique to produce polymer membranes for drug delivery applications, given their large surface area and ability to transport a bioactive compound. A mathematical modeling of the delivery system kinetics was also studied to find the mechanism that controls the releasing process. Results showed that electrospinning could provide regular and smooth membranes suitable for drug delivery processes. The mathematical modeling also proved that thicker PLLA membranes exhibited a Fickian diffusion behavior during the drug transport, presenting better control in drug delivery processes.
Paragonimus sp. in crabs and awareness of the educational community to aquatic ecosystems in La Miel and La Clara, Caldas, Antioquia Paragonimus sp. en cangrejos y sensibilización de la comunidad educativa hacia los ecosistemas acuáticos de La Miel y La Clara, Caldas, Antioquia
Sandra Milena Arias,Lina Marcela Salazar,Eudoro Casas,Alexandra Henao
Biomédica , 2011,
Abstract: Introduction. Previous research has demonstrated the presence of Paragonimus spp. in crabs of three municipalities located in the Medellín river basin. To design a plan for the control and prevention of paragonimosis, parasite presence must be demonstrated in the upper area of the river, and an awareness campaign of its risks must involve the participation of the educational community in focusing attention on the local aquatic resources. Objective. The presence of Paragonimus spp. metarcercariae was established in freshwater crabs from La Miel and La Clara streams, and an awareness campaign created public awareness to management of the aquatic ecosystems for risk reduction. Materials and methods. Nine crabs were collected from streams of La Miel and La Clara villages in 2007 and 2008. The crabs were indentified, sacrificed in the laboratory and examined for presence of Paragonimus spp. metacercariae. Five workshops were conducted with students of educational institutions of the two villages to improve the student perception of paragonimosis risks associated with the local streams. Results. The crabs were identified as Hypolobocera bouvieri. One crab was found with Paragonimus spp. in La Miel. A mollusk, Aroapyrgus colombiensis, another host of the parasite was found in La Clara. That aquatic ecosystems are a great attraction for the local was well established. Conclusions. Foci of Paragonimus spp. flatworms are present in the upper area of Medellín river which includes Caldas. However, local school children were uninformed about the risk of paragonimosis associated with the local aquatic ecosystem. Therefore this province must be included in programs for prevention and control of paragonimosis. The prevalence of this disease recommends educational programs that promote awareness of local aquatic ecosystems and their parasitic inhabitants. Introducción. Estudios previos demostraron la presencia de Paragonimus sp. en cangrejos de tres municipios en la cuenca del río Medellín. Para dise ar un plan para el control y la prevención de la paragonimosis, es necesario determinar la presencia del parásito en la parte alta del río, con la participación de la comunidad educativa, para dirigir su atención hacia el recurso hídrico. Objetivo. Establecer la presencia de metacercarias de Paragonimus sp. en cangrejos de las quebradas La Miel y La Clara, y sensibilizar a la comunidad educativa hacia el manejo adecuado de sus ecosistemas acuáticos. Materiales y métodos. En 2007 y 2008 se recolectaron cangrejos de quebradas de las veredas La Miel y La Clara. En el laboratori
Paragonimus sp. en cangrejos y sensibilización de la comunidad educativa hacia los ecosistemas acuáticos de La Miel y La Clara, Caldas, Antioquia
Arias,Sandra Milena; Salazar,Lina Marcela; Casas,Eudoro; Henao,Alexandra; Velásquez,Luz Elena;
Biomédica , 2011,
Abstract: introduction. previous research has demonstrated the presence of paragonimus spp. in crabs of three municipalities located in the medellín river basin. to design a plan for the control and prevention of paragonimosis, parasite presence must be demonstrated in the upper area of the river, and an awareness campaign of its risks must involve the participation of the educational community in focusing attention on the local aquatic resources. objective. the presence of paragonimus spp. metarcercariae was established in freshwater crabs from la miel and la clara streams, and an awareness campaign created public awareness to management of the aquatic ecosystems for risk reduction. materials and methods. nine crabs were collected from streams of la miel and la clara villages in 2007 and 2008. the crabs were indentified, sacrificed in the laboratory and examined for presence of paragonimus spp. metacercariae. five workshops were conducted with students of educational institutions of the two villages to improve the student perception of paragonimosis risks associated with the local streams. results. the crabs were identified as hypolobocera bouvieri. one crab was found with paragonimus spp. in la miel. a mollusk, aroapyrgus colombiensis, another host of the parasite was found in la clara. that aquatic ecosystems are a great attraction for the local was well established. conclusions. foci of paragonimus spp. flatworms are present in the upper area of medellín river which includes caldas. however, local school children were uninformed about the risk of paragonimosis associated with the local aquatic ecosystem. therefore this province must be included in programs for prevention and control of paragonimosis. the prevalence of this disease recommends educational programs that promote awareness of local aquatic ecosystems and their parasitic inhabitants.
Dwarf spheroidal satellites of the Milky Way from dark matter free tidal dwarf galaxy progenitors: maps of orbits
R. A. Casas,V. Arias,K. Pena Ramírez,P. Kroupa
Physics , 2012, DOI: 10.1111/j.1365-2966.2012.21319.x
Abstract: The long term time evolution of tidal dwarf satellite galaxies with two different initial densities orbiting a host galaxy that resembles the Milky Way has been studied using a large set of Newtonian N-Body simulations. From the simulations two maps of the orbital conditions that lead to quasi-equilibrium objects were constructed. It has been found that several orbits of the satellites allow for the existence, for about 1 Gyr or more, of out-of-equilibrium bodies with high apparent mass-to-light ratios. Within this framework the satellites in the quasi-stable phase reproduce the observed satellite properties for about 16% of the orbit for high density progenitors, and for about 66% for progenitors with lower densities An additional simulation for a single satellite with initial mass of 10^7 Msun and Plummer radius of 0.15 kpc leads to remnants in the quasi- equilibrium phase that simultaneously reproduce remarkably well the observational quantities of the UFDGs of the Milky Way. This satellite in the quasi-stable phase reproduces the observed satellite properties for about 42% of the orbit. The results suggest that a fraction of the observed satellites could plausibly be galaxies without dark matter that have true M/L ratios much lower than those measured. The inflated M/L ratios arise because they are observed at the right time, along the right orbit and during the quasi-equilibrium phase of their evolution. This is a viable explanation for the high M/L ratios observed in all satellites as long as the satellites are preferentially on certain orbits and are observed at certain times. This could arise within the TDG scenario if all satellites are created at the same time along a few specific orbits that are particularly susceptible to the quasi-equilibrium phase.
Epilasik versus Lasek con queratectomía refractiva optimizada y ablación customizada por topografía
Pérez Suárez,Raúl Gabriel; Díaz Parra,Yamila; Hernández Hurtado,Aley; Veras Gamisans,Rosa Sonia; García Báez,Obel; Casas,Xiomara;
Revista Cubana de Oftalmolog?-a , 2010,
Abstract: objective: to assess the effectiveness of excimer laser surgery, using either epithelial laser in situ keratomileusis (epilasik) or laser-assisted epithelial keratectomy as surgical techniques, on the basis of a topoaberrometric study of patients with compound myopic astigmatism. methods: a prospective study was conducted in the anterior segment service of "camilo cienfuegos" international center of pigmentary retinitis. eighty eyes from 40 patients with compound myopic astigmatism (-1 to -6 dioptres) were studied, with a minimal follow-up of 6 months. visual acuity without correction, keratometry, dynamic refraction, cycloplexic refraction, corneal topography, pachymetry, tonometry, biomicroscopy, study of the tear and funduscopy were all evaluated. the corneal waterfront analysis software was used for all the cases. lasek was the chosen technique for right eyes whereas epilasik was used for left eyes, using optimized refractive keratectomy in both procedures. results: in those cases treated with lasek technique, visual acuity without correction changed from 0,12 to 0,93; preoperative sphere average changed -2,77 to -0,08 dioptres at the postoperative phase, the cylinder went from -79 to -0,37 dioptres, spheral aberration at 6mm slightly changed from 0,22 to 0,24 um and the coma varied from 0,19 to 0,20 um. in the cases subjected to epilasik, visual acuity without correction varied from 0,07 to 0,93; the preoperative sphere average modified from -3,79 to 0,01 dioptres in the postoperative period, the cylinder went from -1,25 to -0,35 dioptres, spheral aberration at 6mm changed from 0,26 to 0,39 um, and the coma varied from 0,19 to 0,22 um. as to confocal microscopy, it was observed that recovery was faster in cases operated on with epilasik technique. conclusions: the improvement in visual acuity was statistically significant in both techniques and the decrease in the average sphere and cylinder was very similar; however, the variation in the spheral aberration and
Estudio topoaberrométrico en Lasik después de queratotomía radial
Díaz Parra,Yamila; Pérez Suárez,Raúl G.; Hernández Hurtado,Aléy; Veras Gamisans,Rosa S.; Casas,Xiomara; García Báez,Obel;
Revista Cubana de Oftalmolog?-a , 2007,
Abstract: customized refractive surgery means adapting treatment to the patient according to the corneal characteristics and correcting defects that affect the quality of vision, for example, optical aberrations. twenty one eyes from 13 patients with residual myopia after undergoing radial keratotomy were selected. visual acuity without correction and also, keratometry, dynamic refraction, cycloplegic refraction, corneal topography, tachymetry, tonometry, biomicroscopy, study of the tear and funduscopy were performed. all the eyes were applied the sofware for analysis of corneal wavefront and lasik (queratomileusis in situ with laser) and optimized refractive keratectomy were performed. visual acuity without correction changed from 0.17 to 0.75. average sphere equivalent varied from -4.81 d to -0.67 d. higher-order aberrations before and after surgery changed from 0,970 um to 1,130 um. visual acuity without correction was over 0.8 in all the cases after lasik surgery. spheral equivalent and cylindrical component of the eyes were reduced. total aberrations decreased in all the cases.
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