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Search Results: 1 - 10 of 3494 matches for " Salvadora; Arenas Fuentes "
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Estudio comparativo de la dosis de diálisis medida por dialisancia iónica (Kt) y por Kt/V Comparative study of the dialysis dose measured by ionic dialysance (Kt) and by Kt/V
Ana Vanessa Fernández Martínez,Salvadora Soto Ure?a,María Arenas Fuentes,Natalia Sáez Donaire
Revista de la Sociedad Espa?ola de Enfermería Nefrológica , 2009,
Abstract: La dosis de diálisis administrada influye en la supervivencia de los pacientes, siendo deseable alcanzar un Kt/V óptimo. Diferentes estudios demuestran que existe una buena correlación entre el Kt medido por dialisancia (sin necesidad de extracciones sanguíneas) y el Kt/V. El objetivo de este estudio prospectivo fue comparar la medición de la dosis de diálisis por ambos métodos (Kt y Kt/V) en nuestra población en hemodiálisis, así como aquellos factores relacionados con la técnica que influyen en la dosis de diálisis alcanzada. Se ha estudiado a 131 pacientes. No se aprecian diferencias signifi cativas en el Kt en función del sexo mientras que el Kt/V se muestra como significativamente mayor en las mujeres (1,93 ± 0,23) que en los hombres (1,59 ± 0,25). Mientras que en el Kt las diferencias son significativas en función del acceso vascular no lo son para el Kt/V. En la dosis de diálisis en función del tipo de hemodiálisis, no se aprecian diferencias significativas en Kt/V entre los que reciben tratamiento con HD convencional y los que lo hacen con hemodiafiltración on-line, mientras que el 90% de los pacientes en hemodiafiltración on-line alcanzan un Kt óptimo frente a un 45,5% en HD convencional. La monitorización continua de la dosis de diálisis mediante la medición del Kt por dialisancia iónica permite discriminar mejor a los pacientes en situación de infradiálisis que la determinación del Kt/V. The dialysis dose administered affects patient survival, and it is desirable to attain an optimal Kt/v. Different studies show that there is a good correlation between the Kt measured by dialysance (with no need for blood extractions) and the Kt/V. The aim of this prospective study was to compare the measurement of the dialysis doses using both methods (Kt and Kt/V) in our haemodialysis population, as well as factors related to the technique that affect the dialysis dose reached. 131 patients were studied. No significant differences were observed in Kt depending on sex while Kt/V is significantly higher in women (1.93 ± 0.23) than in men (1.59 ± 0.25). While in Kt the differences are significant depending on the vascular access, they are not for Kt/V. In the dialysis dose depending on the type of haemodialysis, no significant differences were observed in Kt/V between those who receive treatment with conventional HD and those undergoing on-line haemodiafiltration, while 90% of the patients undergoing on-line haemodiafiltration reach an optimal Kt compared to 45.5% in conventional HD. Continuous monitoring of the dialysis dose by measuring the Kt through ionic
Comparación de infusión automática respecto a manual en hemodiafiltracion "on line" post - dilucional Comparison of automatic versus manual infusion in post-dilutional online haemodiafiltration
Ana Vanessa Fernández Martínez,Salvadora Soto Ure?a,Maria Arenas Fuentes,Francisco Horrillo Jiménez
Revista de la Sociedad Espa?ola de Enfermería Nefrológica , 2010,
Abstract: La hemodiafiltración "on-line" postdilucional es el modo de infusión más eficaz para la eliminación de moléculas de diferentes pesos moleculares; también se ha relacionado con un mejor control de la anemia así como del estado nutricional del paciente, confiriendo una menor morbilidad al paciente en hemodiálisis. Recientemente, se han incorporado importantes avances en la tecnología que permiten la prescripción automática del flujo de infusión lo que podría reducir las cargas de enfermería. El objetivo del presente estudio es evaluar la eficacia de la infusión automática comparada con la manual en la HDF on-line postdilucional, mediante la medición del volumen convectivo final y del aclaramiento de peque as moléculas mediante el Kt. También se evalúan las cargas de enfermería medidas por el número de intervenciones relacionadas con la técnica, la valoración de comodidad y eficacia percibida por el personal de enfermería y si hay diferencias en el confort del paciente a lo largo de la sesión. Se dise a un estudio prospectivo sobre 86 pacientes; tras tres sesiones con cada uno de los modos de reinfusión se aprecian diferencias significativas tanto en el volumen de sustitución (1,5litros) como en la dosis de diálisis administrada medida mediante Kt (1,02 litros), que son superiores en la forma automática. Por otra parte, la valoración subjetiva del personal de enfermería es muy superior en el modo automático frente al manual tanto en eficacia percibida como en comodidad. El paciente también expresa un mayor confort en las sesiones con reinfusión automática al disminuir en número de alarmas acústicas y favorecer el descanso. La reinfusión automática aunque con poca repercusión clínica, se muestra como una buena alternativa sobretodo en lo que respecta a la adaptación de la técnica por parte del personal y del propio paciente. Post-dilutional online haemodiafiltration is the most efficacious infusion method for the elimination of molecules with different molecular weights; it has also been associated to a better control of anaemia and of the nutritional condition of the patient, presenting lower morbility for patients undergoing haemodialysis. Recently, major advances have been made in the technology enabling the automatic prescription of the infusion flow, which could reduce the nursing workloads. The aim of this study is to evaluate the efficacy of automatic infusion compared to manual infusion in post-dilutional online HDF, by measuring the final convective volume and the rinsing volume of small molecules using Kt. The nursing workloads were also evaluated,
KT versus kt/v como indicadores en el área de adecuación: Se comportan igual ante la optimización de la dialisis?
Ana Vanesa Fernández Martínez,Tania Ortega Gómez,María Arenas Fuentes,Salvadora Soto Ure?a
Enfermería Nefrológica , 2012,
Abstract:
Estudio comparativo de la dosis de diálisis medida por dialisancia iónica (Kt) y por Kt/V
Fernández Martínez,Ana Vanessa; Soto Ure?a,Salvadora; Arenas Fuentes,María; Sáez Donaire,Natalia; Gracia Canovas,Ma Mercedes; Ortega Hernández,Patricia;
Revista de la Sociedad Espa?ola de Enfermería Nefrológica , 2009, DOI: 10.4321/S1139-13752009000200004
Abstract: the dialysis dose administered affects patient survival, and it is desirable to attain an optimal kt/v. different studies show that there is a good correlation between the kt measured by dialysance (with no need for blood extractions) and the kt/v. the aim of this prospective study was to compare the measurement of the dialysis doses using both methods (kt and kt/v) in our haemodialysis population, as well as factors related to the technique that affect the dialysis dose reached. 131 patients were studied. no significant differences were observed in kt depending on sex while kt/v is significantly higher in women (1.93 ± 0.23) than in men (1.59 ± 0.25). while in kt the differences are significant depending on the vascular access, they are not for kt/v. in the dialysis dose depending on the type of haemodialysis, no significant differences were observed in kt/v between those who receive treatment with conventional hd and those undergoing on-line haemodiafiltration, while 90% of the patients undergoing on-line haemodiafiltration reach an optimal kt compared to 45.5% in conventional hd. continuous monitoring of the dialysis dose by measuring the kt through ionic dialysance makes it possible to discriminate better which patients are in a situation of infradialysis than by determining kt/v.
Comparación de infusión automática respecto a manual en hemodiafiltracion "on line" post - dilucional
Fernández Martínez,Ana Vanessa; Soto Ure?a,Salvadora; Arenas Fuentes,Maria; Horrillo Jiménez,Francisco; Sáez Donaire,Natalia; Pérez Valencia,Laura;
Revista de la Sociedad Espa?ola de Enfermería Nefrológica , 2010, DOI: 10.4321/S1139-13752010000100003
Abstract: post-dilutional online haemodiafiltration is the most efficacious infusion method for the elimination of molecules with different molecular weights; it has also been associated to a better control of anaemia and of the nutritional condition of the patient, presenting lower morbility for patients undergoing haemodialysis. recently, major advances have been made in the technology enabling the automatic prescription of the infusion flow, which could reduce the nursing workloads. the aim of this study is to evaluate the efficacy of automatic infusion compared to manual infusion in post-dilutional online hdf, by measuring the final convective volume and the rinsing volume of small molecules using kt. the nursing workloads were also evaluated, measured by the number of interventions related to the technique, an evaluation of the convenience and efficacy perceived by nursing staff and whether there were differences in the patient's comfort during the session. a prospective study was designed of 86 patients; after three sessions with each of the reinfusion modes, significant differences were observed both in the replacement volume (1.5 litres) and in the dialysis dose administered, measured using kt (1.02 litres), which are higher in the automatic form. furthermore, the subjective evaluation of nursing staff is much higher in the automatic mode compared to manual, both in perceived efficacy and in convenience. patients also expressed greater comfort in sessions with automatic reinfusion as the number of acoustic alarms was reduced, favouring rest. although the clinical effects were slight, automatic reinfusion is shown to be a good alternative especially in relation to the adaptation to the technique by nursing staff and by patients.
Infusión automatizada manual en la hemodiafiltración on-line postdilucional: hacia la optimización del volumen de reinfusión
Fernández Martínez,Ana Vanessa; Horrillo Jiménez,Francisco; Pérez Valencia,Laura; Soto Ure?a,Salvadora; Arenas Fuentes,María; Arregui Arias,Yanina; Pérez García,Rosario; Pereira Martínez,María Soledad;
Revista de la Sociedad Espa?ola de Enfermería Nefrológica , 2011, DOI: 10.4321/S1139-13752011000300006
Abstract: haemodiafiltration (hdf) techniques with high convective volumes are an interesting form of filtering due to their approximation to the native kidney. among them, post-dilution on-line hdf is the most efficacious form of infusion for eliminating molecules with different molecular weights. recent advances in technology permit the automatic prescription of the infusion flow (qi), proving at least as efficacious as manual infusion. the aim of this study is to assess whether it is possible to increase the efficacy of automated infusion in post-dilution on-line hdf by manually increasing the initial qi by measuring the final convective volume and kt. the nursing workloads are also assessed, measured by the number of interventions related to the technique. in all patients (n 96) 3 dialysis sessions are carried out (st 5008 fresenius medical care) with automatic reinfusion, followed by another 3 sessions with manual automated reinfusion increasing the qi by 10 ml/min to the automatically measured dose. the results obtained show significant differences (p<0.001) in the reinfusion volume, which is 6% higher in manual automated form (23.01 ± 2.22 litres) than in automated (21.7 ± 2.62 litres). 75% of patients reached 20 litres or more with self-replacement, compared to 87.5% with manual automated replacement (p<0.001). there are no differences in qb, qd, effective dialysis time and kt. the number of interventions due to alarms related to the technique or nursing staff is higher (p=0.001).
Winter water mass of the Veracruz Reef System
SALAS-PéREZ, J. J.;ARENAS-FUENTES, V.;
Atmósfera , 2011,
Abstract: for the first time, the features of the coastal water mass in winter season, spreading over the veracruz reef system (vrs) have been investigated using hydrographic profiles. the study was performed in two separated surveys of two days of duration in the southern and middle-northern regions of the area. these first measurements showed that there are two most remarkable features: the difference of 5 °c between winter temperature values compared with summer temperature values, and locally (vrs scale) there was a difference between the first and second survey done in the area during the sampling data. it was observed that there was a notable difference in temperature and salinity values of ~ 2 °c and ~ 2 psu, respectively, between the coastal water mass of the southern (antón lizardo reef system) and those of the middle (jamapa river) and northern (northern veracruz reef system) regions, due to the passage of a strong (winds blowing between 12.1 to 18 m/s) to fresh (atmospheric temperature minor of 18 °c) norther. this variability in the water mass composition (with temperature lower than 22 °c) probably has effects on the development of the coral communities of the sampled area.
Potential Applications of Milk Fractions and Valorization of Dairy By-Products: A Review of the State-of-the-Art Available Data, Outlining the Innovation Potential from a Bigger Data Standpoint  [PDF]
Serge Rebouillat, Salvadora Ortega-Requena
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2015, DOI: 10.4236/jbnb.2015.63018
Abstract: The unique composition of milk makes this basic foodstuff into an exceptional raw material for the production of new ingredients with desired properties and diverse applications in the food industry. The fractionation of milk is the key in the development of those ingredients and products; hence continuous research and development on this field, especially various levels of fractionation and separation by filtration, have been carried out. This review focuses on the production of milk fractions as well as their particular properties, applications and processes that increase their exploitation. Whey proteins and caseins from the protein fraction are excellent emulsifiers and protein supplements. Besides, they can be chemically or enzymatically modified to obtain bioactive peptides with numerous functional and nutritional properties. In this context, valorization techniques of cheese-whey proteins, by-product of dairy industry that constitutes both economic and environmental problems, are being developed. Phospholipids from the milk fat fraction are powerful emulsifiers and also have exclusive nutraceutical properties. In addition, enzyme modification of milk phospholipids makes it possible to tailor emulsifiers with particular properties. However, several aspects remain to be overcome; those refer to a deeper understanding of the healthy, functional and nutritional properties of these new ingredients that might be barriers for its use and acceptability. Additionally, in this review, alternative applications of milk constituents in the non-food area such as in the manufacture of plastic materials and textile fibers are also introduced. The unmet needs, the cross-fertilization in between various protein domains,the carbon footprint requirements, the environmental necessities, the health and wellness new demand, etc., are dominant factors in the search for innovation approaches; these factors are also outlining the further innovation potential deriving from those “apparent” constrains obliging science and technology to take them into account.
On Simple Completely Reducible Binary-Lie Superalgebras over sl2(F)  [PDF]
Manuel Arenas
Advances in Pure Mathematics (APM) , 2015, DOI: 10.4236/apm.2015.55030
Abstract:

In this article, we prove that if B is a simple binary-Lie superalgebra whose even part is isomorphic to sl2(F) ?and whose odd part is a completely reducible binary-Lie-module over the even part, then B is a Lie superalgebra. We introduce also a binary-Lie module over which is sl2(F) not completely reducible.

Actinomicetoma por Nocardia sp: Informe de cinco casos tratados con imipenem solo o combinado con amikacina
Fuentes, Adán;Arenas, Roberto;Reyes, Miguel;Fernández, Ramón F;Zacarías, Rogelio;
Gaceta médica de México , 2006,
Abstract: introduction: dapsone with trimethoprim-sulfamethoxazol is currently the standard treatment for actinomycetoma. in select cases, amikacin, streptomycin, kanamycin, amoxicillin/clavulanic acid or phosphomycin may be also added. imipenem has shown to be effective both in vitro and in vivo against some actinomycetes. amikacin with imipenem has a synergistic effect. objectives: to report our preliminary findings using imipenem alone or with amikacin for severe or multi-resistant mycetomas due to nocardia sp. material and methods: we present 5 cases of chronic mycetoma infection previously treated with anti-bacterial multidrug regimens. all patients were hospitalized and treated with imipenem 500 mg iv, three times a day for three weeks. three patients received in addition amikacin. results: we included 3 male and 2 female patients. the average length of disease duration was 7.4 years. in 3 cases mycetoma was located on the back; one of them involved the rib and the lung. one case was localized in the abdominal wall, and another one involved the posterior side of the cervical region. two patients achieved clinical and bacteriological cure one year after treatment with imipenem, and the remaining three displayed clinical improvement, even though grains were observed, cultures where negative. none of the 5 patients studied showed clinical evidence of adverse reactions to imipenem. conclusions: imipenem is a strong antibiotic and constitutes an important treatment alternative for severe or multi-resistant mycetoma especially for cases with bone and visceral involvement.
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