Hôpitaux Universitaires Grand Ouest

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Digi-NewB au EMBEC2017 et au GRETSI

Digi-NewB a été présenté à deux conférences organisées en Juin et Septembre 2017.

Postr GRETSI

 

GRETSI Evénement technologie et traitement du signal
Nadine Khodor de l'Université de Rennes 1 / LTSI a présenté un poster sur l'évaluation de la maturité des nouveaux-nés prématurés par le graphe de visibilité. 

 

Abstract: In this study, the visibility algorithm, which is a fast and simple method that converts a time series into a graph, was used to characterize the complex behavior of cardiac variability for the evaluation of the maturation of premature babies. In terms of methods, it is shown that some of the parameters extracted from the visibility graph provide new information about the complex behavior of heart rate variability. Clinically, the association of a set of classical parameters of cardiac variability with the visualization parameters shows a good separation between a group of 28 babies born at term and another of 28 preterm babies with less than 32 weeks of gestational age. These findings indicate that cardiac variability in premature babies creates a complex network less dynamic than that of full term babies and they have a reduction in the overall change in heart rate.

EMBEC2017 (Conférence européenne d'ingénierie biologique et médicale) 
Elina Helander de l'Université de Tampere University of Technology a présenté son papier "Comparison of linear and non-linear heart rate variability indices between preterm infants at their theoretical term age and full term newborns"

Abstract: Preterm infants are known to have altered HRV characteristics that remain even when they reach their term age. However, little is known about non-linear HRV measures between full term and preterm babies close to their theoretical full term. We calculated various non-traditional indices, such as sample entropy, shape-describing parameters (skewness and kurtosis) and detrended fluctuation analysis coefficients α1 and α2 from RR time series of very preterm babies (37 weeks, “FT group”) infants. Compared to infants born full-term, smaller values of sample entropy and lower values of α1 were found in the PT group. No difference in α2, kurtosis, or skewness was found. This indicates decrease in overall complexity of HR dynamics in the preterm group. The combinations of several HRV parameters can be of interest for future studies on the degree of autonomic nervous system maturity.