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Search Results: 1 - 10 of 594648 matches for " A. Pérez-Rubio "
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Evaluación de la adecuación de las estancias en un hospital de tercer nivel Evaluation of the appropriateness of stays in a third level hospital
A. Pérez-Rubio,S. Santos,F. J. Luquero,S. Tamames
Anales del Sistema Sanitario de Navarra , 2007,
Abstract: Fundamento: The Appropriateness Evaluation Protocol (AEP) se ha mostrado como una herramienta útil para la revisión de la utilización de los recursos hospitalarios. El objetivo de este trabajo es conocer la proporción de ingresos y estancias inadecuadas, así como sus causas, en pacientes hospitalizados en el Hospital Clínico Universitario de Valladolid (HCUV). Material y métodos: Estudio observacional analítico de cohortes retrospectivo. El período de estudio ha sido de un a o (2004). Se seleccionó una muestra de 1.630 ingresos. La definición de caso, las variables de interés y el modelo de recogida de datos se han llevado a cabo conforme al AEP. Se han analizado las principales variables mediante un análisis basal y las posibles relaciones entre ellas. Resultados: El 54% de los ingresos presentaron al menos un día de estancia inadecuada, siendo la tasa de inadecuación global del 34,17%. Entre las causas responsables de la inadecuación, el 68,9% de los ingresos presentaron al menos un criterio englobado dentro de la responsabilidad del médico o del hospital, y el 51,3% debido a retrasos en el desarrollo del estudio o tratamiento. Conclusiones: La utilización de métodos de identificación del uso inapropiado como el AEP presenta aplicaciones tanto en planificación como en gestión hospitalaria, al permitir identificar problemas hospitalarios causantes de demoras, principalmente problemas de tipo organizativo, permitiendo el desarrollo de intervenciones encaminadas a la reducción del uso inapropiado. Background: The Appropriateness Evaluation Protocol (AEP) has proved to be a useful tool for reviewing the utilisation of hospital resources. The aim of this article is to determine the proportion of inappropriate admissions and stays, as well as their causes, in patients hospitalised in the Hospital Clínico Universitario de Valladolid (HCUV). Material and methods: A retrospective, analytical, observational, cohort study. The period of study was one year (2004). A sample of 1,630 admissions was gathered. Case definition, variables of interest and the model of data gathering were carried out in accordance with the AEP. The principal variables were analysed by means of a basal analysis and the possible relations between them. Results: Fifty-four percent of the admissions showed at least one day of inappropriate stay, with the global rate of inappropriateness being 34.17%. Amongst the causes responsible for inappropriateness, 68.9% of admissions showed at least one criterion falling under the responsibility of the doctor or the hospital, and 51.3% were due to dela
Evaluación de la adecuación de las estancias en un hospital de tercer nivel
Pérez-Rubio,A.; Santos,S.; Luquero,F. J.; Tamames,S.; Cantón,B.; Castrodeza,J.J.;
Anales del Sistema Sanitario de Navarra , 2007, DOI: 10.4321/S1137-66272007000100003
Abstract: background: the appropriateness evaluation protocol (aep) has proved to be a useful tool for reviewing the utilisation of hospital resources. the aim of this article is to determine the proportion of inappropriate admissions and stays, as well as their causes, in patients hospitalised in the hospital clínico universitario de valladolid (hcuv). material and methods: a retrospective, analytical, observational, cohort study. the period of study was one year (2004). a sample of 1,630 admissions was gathered. case definition, variables of interest and the model of data gathering were carried out in accordance with the aep. the principal variables were analysed by means of a basal analysis and the possible relations between them. results: fifty-four percent of the admissions showed at least one day of inappropriate stay, with the global rate of inappropriateness being 34.17%. amongst the causes responsible for inappropriateness, 68.9% of admissions showed at least one criterion falling under the responsibility of the doctor or the hospital, and 51.3% were due to delays in the development of study or treatment. conclusions: the utilisation of methods of identification of inappropriate use such as aep show applications both in planning and in hospital management, by making it possible to identify hospital problems causing delays, principally problems of an organisational type, making it possible to develop interventions aimed at reducing inappropriate use.
Charmed Baryon Spectroscopy from lattice QCD for $N_f = 2 + 1$ flavours
Paula Pérez-Rubio
Physics , 2013,
Abstract: In recent years, several charmed baryons have been discovered, with more states likely to be found in the future. We investigate the spectra of singly and doubly charmed baryons on the lattice. The spin J=1/2 and J=3/2 states are calculated for both positive and negative parity.
Second Moment of the Pion Light-cone Distribution Amplitude from Lattice QCD
V. M. Braun,S. Collins,M. G?ckeler,P. Pérez-Rubio,A. Sch?fer,R. W. Schiel,A. Sternbeck
Physics , 2015, DOI: 10.1103/PhysRevD.92.014504
Abstract: We present the results of a lattice study of the second moment of the light-cone pion distribution amplitude using two flavors of dynamical (clover) fermions on lattices of different volumes and pion masses down to $m_\pi\sim 150 \, \mathrm {MeV}$. At lattice spacings between $0.06 \, \mathrm {fm}$ and $0.08 \, \mathrm {fm}$ we find for the second Gegenbauer moment the value $a_2 = 0.1364(154)(145)$ at the scale $\mu=2 \, \mathrm {GeV}$ in the $\overline{\mathrm{MS}}$ scheme, where the first error is statistical including the uncertainty of the chiral extrapolation, and the second error is the estimated uncertainty coming from the nonperturbatively determined renormalization factors.
Pion Distribution Amplitude from Lattice QCD
V. M. Braun,S. Collins,M. G?ckeler,P. Pérez-Rubio,A. Sch?fer,R. W. Schiel,A. Sternbeck
Physics , 2015,
Abstract: We have calculated the second moment of the pion light-cone distribution amplitude using two flavors of dynamical (clover) fermions on lattices of different volumes, lattice spacings between $0.06 \, \mathrm {fm}$ and $0.08 \, \mathrm {fm}$ and pion masses down to $m_\pi\sim 150 \, \mathrm {MeV}$. Our result for the second Gegenbauer coefficient is $a_2 = 0.1364(154)(145)$ and for the width parameter $\langle \xi^2 \rangle = 0.2361(41)(39)$. Both numbers refer to the scale $\mu=2 \, \mathrm {GeV}$in the $\overline{\text{MS}}$ scheme, the first error is statistical including the uncertainty of the chiral extrapolation, and the second error is the estimated uncertainty coming from the nonperturbatively determined renormalization factors.
Gripe (H1N1) 2009 en Castilla y León: estudio de casos hospitalizados y concordancia con los protocolos de actuación desarrollados
López-García,Eva; Fernández-Arribas,Socorro; Pérez-Rubio,Alberto; Eiros-Bouza,José María; Castrodeza-Sanz,José Javier; ,;
Revista Espa?ola de Salud Pública , 2010, DOI: 10.1590/S1135-57272010000500018
Abstract: background: in april 2009, the world health organization declared the emergence of human cases by a new influenza virus h1n1 as a public health emergency of international importance. our objective was to analyze the characteristics of the cases investigated and to assess the compliance of the subjects studied with the indications and recommendations of the health regional ministry of health castilla y león. methods: a descriptive epidemiological study of all positive cases and every requests made to castilla y león, from epidemiological weeks 44 to 50, both included. results: 588 requests were made to test for influenza a h1n1 (58% males). the mean age was 34.8 years (27.1% between 15 and 44 years). 42% fulfilled criteria for severity. chronic respiratory disease was the most common risk factor found (18.9%). antiviral treatment was found in 19.1% (54.5% within the first 48 hours). 27.4% of the requests were positive (53.4% males). the mean age of the positive cases was 34.52 years was positive (33.1% between 15 and 44 years). 47.8% of them fulfilled criteria for severity and chronic respiratory disease was also the most common risk factor found also in the positive (26.7%). only 6.8% were morbidly obese. 28.9% of positives received antiviral treatment (61.4% within the first 48 hours). conclusion: most cases did not fulfil severity criteria, which illustrates the low compliance of monitoring protocols in sanitary care system.
Impacto social y económico de la vacunación frente a la varicela a los 15 meses de edad en Castilla y León en 2004
Pérez-Rubio,A.; Castrodeza Sanz,J.J.; Gil Costa,M.; Luquero Alcalde,F.J.; Eiros Bouza,J.; Ortiz de Lejarazu,R.;
Revista Espa?ola de Salud Pública , 2008, DOI: 10.1590/S1135-57272008000100009
Abstract: background: chicken pox is a mainly childhood contagious disease caused by the varicella zoster virus which gives rise to major healthcare and social costs. in 2005, castile and leon added chicken pox vaccine injections to its childhood vaccination schedule for eleven year-olds subject to coming down with this disease. this strategy does not modify the major mobility generated thereby at younger ages. this study is aimed at evaluating the profitability of systematic vaccination for chicken pox in infants 15 months of age in castile and leon. methods: an economic cost-benefit evaluation has been set out by jeans of a decision-making tree. a fictitious cohort of 100,000 children in castile and leon having reached 15 months of age in 2004 is studied, to whom the chicken pox vaccine would be administered in conjunction with the mumps, measles, rubella vaccines. this study is approached from the social standpoint. the time horizon selected was that of up until the study cohort was to reach 15 years of age, applying a 3% discount rate. a sensitivity analysis was made for evaluating the uncertainty of some variables... results: the cost-benefit ratio of adding this vaccine to the childhood vaccination schedule amounts to 1.23. conclusions: from the social standpoint, administering chicken pox vaccine in conjunction with the mumps, measles, rubella vaccines show itself to be profitable. the profitability is modified both if a second dose of vaccine is added as well as if only the direct healthcare costs are analyzed.
Non-perturbative running of the coupling from four flavour lattice QCD with staggered quarks
Paula Pérez-Rubio,Stefan Sint
Physics , 2010,
Abstract: Using the Schr\"odinger functional (SF) with a single staggered fermion field we calculate the SF coupling in four-flavour QCD for a wide range of energies and lattice sizes up to $L/a=16$. Preliminary results for the continuum extrapolation of the step-scaling function are presented. To reduce cutoff effects, one-loop ${\rm O}(a)$ improvement has been implemented. Various cross checks are made possible by the use of two independent sets of lattices with either $T=L+a$ or $T=L-a$.
Disconnected contributions to D-meson semi-leptonic decay form factors
G. S. Bali,S. Collins,R. Horsley,I. Kanamori,Y. Nakamura,D. Pleiter,P. Pérez-Rubio,P. E. L. Rakow,A. Sch?fer,G. Schierholz,F. Winter,J. M. Zanotti
Physics , 2011,
Abstract: We calculate the disconnected contribution to the form factor for the semileptonic decay of a D-meson into a final state, containing a flavor singlet eta meson. We use QCDSF n_f=2+1 configurations at the flavor symmetric point m_u=m_d=m_s and the partially quenched approximation for the relativistic charm quark. Several acceleration and noise reduction techniques for the stochastic estimation of the disconnected loop are tested.
Charmed baryon spectroscopy and light flavour symmetry from lattice QCD
Gunnar Bali,Sara Collins,Paula Pérez-Rubio
Physics , 2015, DOI: 10.1103/PhysRevD.92.034504
Abstract: We determine the ground state and first excited state masses of singly and doubly charmed spin 1/2 and 3/2 baryons with positive and negative parity. Configurations with $N_f=2+1$ non-perturbatively improved Wilson-clover fermions were employed, with the same quark action also being used for the valence quarks, including the charm. The spectrum is calculated for pion masses in the range $M_\pi \sim 259-460$ MeV at a lattice spacing $a\sim 0.075$ fm. Finite volume effects are studied comparing lattices with two different linear spatial extents ($1.8\,{\rm fm}$ and $2.4\,{\rm fm}$). The physical point is approached from the SU(3) limit keeping the flavour averaged light quark mass fixed. The baryon masses are extrapolated using expansions in the strange-light quark mass difference. Most particles fall into the expected SU(3) multiplets with well constrained extrapolations, the exceptions having a possibly more complex internal structure. Overall agreement is found with experiment for the masses and splittings of the singly charmed baryons. As part of the calculation an analysis of the lower lying charmonium, $D$ and $D_s$ spectra was performed in order to assess discretisation errors. The gross spectra are reproduced, including the $D^*_{s0}$, $D_{s1}$ and $D_1$ mesons, while at this single lattice spacing hyperfine splittings come out $10-20$ MeV too low.
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