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Dive into the research topics where Roberto Hornero Sánchez is active.

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Featured researches published by Roberto Hornero Sánchez.


International Journal of E-health and Medical Communications | 2010

Response Time Estimation of a Web-Based Electronic Health Record EHR System using Queuing Model

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

Variability of Pulse Signal Frequency Obtained Using Nocturnal Pulse Oximetry in Patients with Sleep Apnoea/Hypoapnoea Syndrome

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

Variabilidad de la señal de frecuencia de pulso obtenida mediante pulsioximetría nocturna en pacientes con síndrome de apnea hipopnea del sueño

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

A Web-Based Application to Exchange Ophthalmologic Health Records Using Open-Source Databases

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

Method and apparatus for evaluation of fluid responsiveness

Pedro Mateo Riobo Aboy; Roberto Hornero Sánchez; Carlos Gómez Peña


Archive | 1999

The test of Random Rhythm Generation and neuropsychological performance in schizophrenic patients

Natalia Jimeno Bulnes; A. Jimeno; Roberto Hornero Sánchez; Alonso Alonso; Pedro Espino


Archive | 2012

METHOD AND APPARATUS FOR MONITORING SLEEP APNEA SEVERITY

Roberto Hornero Sánchez; José Victor Marcos Martín; Daniel Álvarez González; Pedro Mateo Riobo Aboy; Félix del Campo Matías


Archive | 2011

Method, System, and Apparatus for Automatic Detection of Obstructive Sleep Apnea from Oxygen Saturation Recordings

Roberto Hornero Sánchez; José Victor Marcos Martín; Daniel Álvarez González; Pedro Mateo Riobo Aboy; Félix del Campo Matías


Archive | 2014

Análisis espectral y no lineal de la señal de oximetría domiciliaria en la ayuda al diagnóstico de la apnea infantil

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

Improving the accessibility at home: implementation of a domotic application using a p300-based brain computer interface system

Rebeca Corralejo Palacios; Roberto Hornero Sánchez; Daniel Álvarez González; Laura Martín González

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Alonso Alonso

University of Valladolid

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