Roberto Hornero Sánchez
University of Valladolid
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Featured researches published by Roberto Hornero Sánchez.
International Journal of E-health and Medical Communications | 2010
Isabel de la Torre Díez; Francisco Javier Díaz Pernas; Miguel López Coronado; Roberto Hornero Sánchez; María Isabel López Gálvez; Miriam Antón Rodríguez
Response time measurement of a Web system is critically important to evaluate its performance. This response time is one of the main barriers usually found in the implementation of an effective Electronic Health Records EHRs system. The database selected will affect the system performance. This paper presents a comparison of the response times of a EHRs Web system, TeleOftalWeb, using different databases. In order to calculate these times, M/M/1 queuing models is used. Four databases were selected: Oracle 10g, dbXML 2.0, Xindice 1.2, and eXist 1.1.1. The final objective of the comparison is choosing the database system resulting in the lowest response time to TeleOftalWeb.
Archivos De Bronconeumologia | 2010
Félix del Campo Matía; Roberto Hornero Sánchez; Carlos Zamarrón Sanz; Daniel Álvarez González; J. Víctor Marcos Martín
a b s t r a c t Introduction: The measurement of central tendency (MCT) is a non-linear analysis technique which applied to second order differences diagrams enables the degree of variability to be quantified in a data series. In the present study an attempt is made to quantify and characterise the changes in heart rate obtained by pulse oximetry in patients with a clinical suspicion of sleep apnoea/hypoapnoea syndrome (SAHS) using the MCT and to evaluate its diagnostic use. Patients and Methods: A total of 187 patients were included in the study, on whom a nocturnal polysomnographic and pulse oximetry study was performed. To evaluate the variability of the heart rate the MCT applied to graphs of second order differences obtained from the heart rate record. Result: Patients with SAHS had a higher heart rate variablity than patients without SAHS (0.449 vs 0.666, P<.001). In the multivariate analysis, the heart rate, the minimum saturation and the desaturation index of 4% were independently associated with the heart rate variability. As a diagnostic method, the MCT of the heart rate gives a sensitivity of 69.3%, a specificity of 77.6% and a diagnostic precision of 72.7%. Conclusions: Patients with SAHS have a greater variabilityin heart rate during the night, evaluated by applying the MCT of the heart rate to diagrams of second order differences. As a screening method, the MCT applied to the heart rate has a moderate sensitivity and specificity.
Archivos De Bronconeumologia | 2010
Félix del Campo Matía; Roberto Hornero Sánchez; Carlos Zamarrón Sanz; Daniel Álvarez González; J. Víctor Marcos Martín
INTRODUCTION The measurement of central tendency (MCT) is a non-linear analysis technique which applied to second order differences diagrams enables the degree of variability to be quantified in a data series. In the present study an attempt is made to quantify and characterise the changes in heart rate obtained by pulse oximetry in patients with a clinical suspicion of sleep apnoea/hypoapnoea syndrome (SAHS) using the MCT and to evaluate its diagnostic use. PATIENTS AND METHODS A total of 187 patients were included in the study, on whom a nocturnal polysomnographic and pulse oximetry study was performed. To evaluate the variability of the heart rate the MCT applied to graphs of second order differences obtained from the heart rate record. RESULT Patients with SAHS had a higher heart rate variability than patients without SAHS (0.449 vs. 0.666, P<0.001. In the multivariate analysis, the heart rate, the minimum saturation and the desaturation index of 4% were independently associated with the heart rate variability. As a diagnostic method, the MCT of the heart rate gives a sensitivity of 69.3%, a specificity of 77.6% and a diagnostic precision of 72.7% CONCLUSIONS Patients with SAHS have a greater variability in heart rate during the night, evaluated by applying the MCT of the heart rate to diagrams of second order differences. As a screening method, the MCT applied to the heart rate has a moderate sensitivity and specificity.
Web-Based Applications in Healthcare and Biomedicine | 2010
Isabel de la Torre Díez; Roberto Hornero Sánchez; Miguel López Coronado; María Isabel López Gálvez; Beatriz Sainz de Abajo
Electronic Health Record (EHR) refers to an individual patient’s medical record in digital format. Several models of standardization for EHR exchange have been proposed and multiple organizations formed to help evaluate and implement them. In this chapter, we present a web-based application (TeleOftalWeb) to store and exchange EHR and fundus photographs. We apply Health Level 7/Clinical Document Architecture (HL7/CDA) Release One and Digital Imaging and Communications in Medicine (DICOM) standards. It has been built on Java Servlet and Java Server Pages (JSP) technologies. EHR and fundus photographs are stored in an open-source database, eXist. Its architecture is triple-layered. The application verifies the standards related to privacy and confidentiality. Data transmissions were carried over encrypted Internet connections such as HyperText Transfer Protocol over SSL (HTTPS).
Archive | 2009
Pedro Mateo Riobo Aboy; Roberto Hornero Sánchez; Carlos Gómez Peña
Archive | 1999
Natalia Jimeno Bulnes; A. Jimeno; Roberto Hornero Sánchez; Alonso Alonso; Pedro Espino
Archive | 2012
Roberto Hornero Sánchez; José Victor Marcos Martín; Daniel Álvarez González; Pedro Mateo Riobo Aboy; Félix del Campo Matías
Archive | 2011
Roberto Hornero Sánchez; José Victor Marcos Martín; Daniel Álvarez González; Pedro Mateo Riobo Aboy; Félix del Campo Matías
Archive | 2014
Daniel Álvarez González; Gonzalo César Gutiérrez Tobal; María Luz Alonso Álvarez; Joaquín Terán Santos; Félix del Campo Matías; Roberto Hornero Sánchez
Journal of accessibility and design for all: JACCES | 2012
Rebeca Corralejo Palacios; Roberto Hornero Sánchez; Daniel Álvarez González; Laura Martín González