The Nonlinear Dynamic Response of Intrapartum Fetal Heart Rate to Uterine Pressure

The research objective of our group is to improve the intrapartum detection of cardiotocography tracings associated with an increased risk of developing fetal acidosis and subsequent hypoxic-ischemic encephalopathy (HIE). The detection methods that we aim to develop must be sensitive to abnormal tra...

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Published in:2022 Computing in Cardiology (CinC) 2022-09, Vol.498, p.1-4
Main Authors: Vargas-Calixto, Johann, Wu, Yvonne, Kuzniewicz, Michael, Cornet, Marie-Coralie, Forquer, Heather, Gerstley, Lawrence, Hamilton, Emily, Warrick, Philip, Kearney, Robert
Format: Article
Language:English
Subjects:
Cardiography
Cardiology
Fetal heart rate
Linear systems
Linearity
Nonlinear dynamical systems
State-space methods
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container_title 2022 Computing in Cardiology (CinC)
container_volume 498
creator Vargas-Calixto, Johann
Wu, Yvonne
Kuzniewicz, Michael
Cornet, Marie-Coralie
Forquer, Heather
Gerstley, Lawrence
Hamilton, Emily
Warrick, Philip
Kearney, Robert
description The research objective of our group is to improve the intrapartum detection of cardiotocography tracings associated with an increased risk of developing fetal acidosis and subsequent hypoxic-ischemic encephalopathy (HIE). The detection methods that we aim to develop must be sensitive to abnormal tracings without causing excessive unnecessary interventions. Past studies showed that the dynamic response of fetal heart rate (FHR) to uterine pressure (UP) during the intrapartum could be modelled using linear systems. In this study, we examined the assumption of linearity by comparing the performance of linear dynamic and nonlinear dynamic models of the UP-FHR system. The linear systems were defined by second-order state-space models. The nonlinear systems were defined by Hammerstein models: a cascade of a static nonlinearity and a linear second-order state-space model. Our results showed that nonlinear dynamic models were better than linear systems in 81.8% of UP-FHR segments.
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subjects Cardiography
Cardiology
Fetal heart rate
Linear systems
Linearity
Nonlinear dynamical systems
State-space methods
title The Nonlinear Dynamic Response of Intrapartum Fetal Heart Rate to Uterine Pressure
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