Low-order parametric system identification for intrapartum uterine pressure-fetal heart rate interaction.
For uterine pressure-fetal heart rate data collected during labour and delivery, we first identify the impulse response function (IRF) by least squares. We then use singular value decomposition of this noisy least-squares estimate and an order-reduction search to obtain an improved order estimate compared to that based on the standard minimum-description length (MDL). This ;cleaner' IRF is succinctly parameterized by fitting it with a second-order dynamic model. Using standard hypothesis tests, the model coefficients show statistically significant differences between normal and pathological cases.
Warrick
Philip A
PA
Biomedical Engineering Department, McGill University, Montreal, Quebec, Canada. philip.warrick@mcgill.ca
Kearney
Robert E
RE
Precup
Doina
D
Hamilton
Emily F
EF
D005260:Female; D006340:Heart Rate, Fetal / Q000502:physiology*; D006801:Humans; D011247:Pregnancy; D011312:Pressure; D018709:Statistics, Nonparametric; D014599:Uterus / Q000502:physiology*