Browsing by Author "Caicedo Dorado, Alexander"
Now showing items 1-20 of 40
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A brain-age model for preterm infants based on functional connectivity
"In this study, the development of EEG functional connectivity during early development has been investigated in order to provide a predictive age model for premature infants. Approach: The functional connectivity has been ...
Artículo. 2018
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A New Framework for the Assessment of Cerebral Hemodynamics Regulation in Neonates Using NIRS
We present a new framework for the assessment of cerebral hemodynamics regulation (CHR) in neonates using near-infrared spectroscopy (NIRS). In premature infants, NIRS measurements have been used as surrogate variables for ... parte de Libro. 2016
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A novel algorithm for the automatic detection of sleep apnea from single-lead ECG
Goal: This paper presents a methodology for the automatic detection of sleep apnea from single-lead ECG. Methods: It uses two novel features derived from the ECG, and two well-known features in heart rate variability ... Artículo. 2015
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An improved ECG-derived respiration method using kernel principal component analysis
Recent studies show that principal component analysis (PCA) of heart beats generates well-performing ECG-derived respiratory signals (EDR). This study aims at improving the performance of EDR signals using kernel PCA (kPCA). ... Artículo. 2011
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Analysis of non-linear respiratory influences on sleep apnea classification
In this paper we propose the use of Kernel Principal Component Regression (KPCR) in order to model the nonlinear interaction between heart rate (HR) and respiration. We used wavelets in order to decompose the respiratory ... Artículo. 2014
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Assessment of dynamic cerebral autoregulation in humans: Is reproducibility dependent on blood pressure variability?
"We tested the influence of blood pressure variability on the reproducibility of dynamic cerebral autoregulation (DCA) estimates. Data were analyzed from the 2nd CARNet bootstrap initiative, where mean arterial blood ...
Artículo. 2020
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Assessment of the Myogenic and Metabolic Mechanism Influence in Cerebral Autoregulation Using Near-Infrared Spectroscopy
Cerebral autoregulation is normally controlled via three different mechanisms, namely: the myogenic, the metabolic, and the neurogenic one. The myogenic mechanism responds efficiently to slow changes in mean arterial blood ... parte de Libro. 2011
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Automatic quiet sleep detection based on multifractality in preterm neonates: effects of maturation
This study investigates the multifractal formalism framework for quiet sleep detection in preterm babies. EEG recordings from 25 healthy preterm infants were used in order to evaluate the performance of multifractal measures ... parte de Libro. 2017
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Canonical Correlation Analysis in the Study of Cerebral and Peripheral Haemodynamics Interrelations with Systemic Variables in Neonates Supported on ECMO
Neonates supported on extracorporeal membrane oxygenation (ECMO) are at high risk of brain injury due to haemodynamic instability. In order to monitor cerebral and peripheral (muscle) haemodynamic and oxygenation changes ... parte de Libro. 2012
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Cerebral autoregulation and activity after propofol for endotracheal intubation in preterm neonates
Background: Despite increasing use of propofol in neonates, observations on cerebral effects are limited. Aim: To investigate cerebral autoregulation (CAR) and activity after propofol for endotracheal intubation in preterm ... Artículo. 2018
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Cerebral tissue oxygenation and regional oxygen saturation can be used to study cerebral autoregulation in prematurely born infants
The coupling of cerebral intravascular oxygenation (dHbD) with mean arterial blood pressure (MABP) was taken as a reflection of autoregulation assuming constant arterial oxygen content. However, this method is sensitive ... Artículo. 2011
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Changes in Oxygenation Levels Precede Changes in Amplitude of the EEG in Premature Infants
Duchenne muscular dystrophy (DMD) is the most common and devastating type of muscular dystrophy worldwide. In this study we have investigated the potential of the combined use of non-invasive near-infrared spectroscopy ... parte de Libro. 2016
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Complexity analysis of neonatal EEG using multiscale entropy: applications in brain maturation and sleep stage classification
Automated analysis of the electroencephalographic (EEG) data for the brain monitoring of preterm infants has gained attention in the last decades. In this study, we analyze the complexity of neonatal EEG, quantified using ... Artículo. 2017
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Decomposition of a multiscale entropy tensor for sleep stage identification in preterm infants
"Established sleep cycling is one of the main hallmarks of early brain development in preterm infants, therefore, automated classification of the sleep stages in preterm infants can be used to assess the neonate's cerebral ... Artículo. 2019
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Decomposition of near-infrared spectroscopy signals using oblique subspace projections: applications in brain hemodynamic monitoring
Clinical data is comprised by a large number of synchronously collected biomedical signals that are measured at different locations. Deciphering the interrelationships of these signals can yield important information about ... Artículo. 2016
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Detection of cerebral autoregulation by near-infrared spectroscopy in neonates: performance analysis of measurement methods
Cerebral Autoregulation, in clinical practice, is assessed by means of correlation or coherence analysis between mean arterial blood pressure (MABP) and cerebral blood flow (CBF). However, even though there is evidence ... Artículo. 2012
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Detection of epileptic seizures from single lead ECG by means of phase rectified signal averaging
Epileptic seizures have a clear effect on the regulatory mechanisms of the autonomic nervous system, especially on the cardiac and respiratory controls. Changes in heart rate and respiration are well known to occur around ... Artículo. 2014
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Differences in Contraction-Induced Hemodynamics and Surface EMG in Duchenne Muscular Dystrophy
Duchenne muscular dystrophy (DMD) is the most common and devastating type of muscular dystrophy worldwide. In this study we have investigated the potential of the combined use of non-invasive near-infrared spectroscopy ... parte de Libro. 2016
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Differences in the cerebral hemodynamics regulation mechanisms of premature infants with intra-ventricular hemorrhage assessed by means of phase rectified signal averaging
Cerebral hemodynamics regulation consists of several mechanisms that try to keep brain homeostasis. In premature infants, due to the immaturity of their cerebral vascular bed, these mechanisms might be impaired exposing ... Artículo. 2014
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Dynamic cerebral autoregulation reproducibility is affected by physiological variability
"Parameters describing dynamic cerebral autoregulation (DCA) have limited reproducibility. In an international, multi-center study, we evaluated the influence of multiple analytical methods on the reproducibility of DCA. ... Artículo. 2019
