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Medical & Biological Engineering & Computing

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01.10.2006 | Original Article

Linear and nonlinear fetal heart rate analysis of normal and acidemic fetuses in the minutes preceding delivery

verfasst von: Hernâni Gonçalves, Ana Paula Rocha, Diogo Ayres-de-Campos, João Bernardes

Erschienen in: Medical & Biological Engineering & Computing | Ausgabe 10/2006

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Abstract

Linear and nonlinear fetal heart rate (FHR) indices, namely mean FHR, interval index (II), very low, low and high frequencies, approximate (ApEn) and sample entropy (SampEn), were computed, immediately before delivery, in the initial and final FHR tracing segments, from 48 normal, 10 mildly acidemic and 10 moderate-to-severely acidemic fetuses. Progression of labor was associated with a significant increase in linear frequency domain indices whereas nonlinear indices were significantly decreased. Moderate-to-severe fetal acidemia was associated with a significant decrease in nonlinear indices. The best discrimination between moderate-to-severe acidemic fetuses and the remaining cases was obtained combining II and ApEn(2,0.15), with a specificity of 71% and a sensitivity of 80%. These findings support the hypothesis of increased autonomic nervous system activity in the final minutes of labor and of decreased central nervous system activity, both in the final minutes of labor and in moderate-to-severe acidemic fetuses.

Vorheriger Artikel Neonatal pain analyzer: development and validation

Nächster Artikel Finite difference and lead field methods in designing implantable ECG monitor

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Titel: Linear and nonlinear fetal heart rate analysis of normal and acidemic fetuses in the minutes preceding delivery
verfasst von: Hernâni Gonçalves
Ana Paula Rocha
Diogo Ayres-de-Campos
João Bernardes
Publikationsdatum: 01.10.2006
Verlag: Springer-Verlag
Erschienen in: Medical & Biological Engineering & Computing / Ausgabe 10/2006
Print ISSN: 0140-0118
Elektronische ISSN: 1741-0444
DOI: https://doi.org/10.1007/s11517-006-0105-6

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