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Updated: Jan 26, 2026

Hemodynamic Precision in the Neonatal Intensive Care Unit using Targeted Neonatal Echocardiography
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Hemodynamic Precision in the Neonatal Intensive Care Unit using Targeted Neonatal Echocardiography

Published on: January 27, 2023

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Assessment of Signal Processing Methods for Measuring the Respiratory Rate in the Neonatal Intensive Care Unit

Joao Jorge, Mauricio Villarroel, Sitthichok Chaichulee

    IEEE Journal of Biomedical and Health Informatics
    |April 6, 2019
    PubMed

    Insights

    Accurate respiratory rate (RR) estimation in premature infants is crucial. Chest impedance, ECG, and PPG methods work well for RR between 40-80 bpm, but struggle at faster rates.

    Area of Science:

    • Neonatal physiology
    • Cardiorespiratory monitoring

    Background:

    • Pathological breathing patterns offer insights into critically-ill infant cardiorespiratory status and maturation.
    • Accurate respiratory rate (RR) measurement is vital for monitoring premature infants.

    Purpose of the Study:

    • To compare the accuracy of RR estimation from chest impedance pneumography, ECG-derived rhythms, and PPG-derived rhythms against manual breath counts in premature infants.

    Main Methods:

    • 165 manual breath counts were performed as the reference standard.
    • RR was estimated using chest impedance pneumography, ECG-derived respiratory rhythms, and PPG-derived respiratory rhythms.
    • Comparison of estimated RR against the reference standard.

    Main Results:

    • Accurate RR estimates (40-80 bpm) were achieved from all tested methods.
    • ECG and PPG methods showed limitations at fast breathing rates (>80 bpm).

    Conclusions:

    • Chest impedance, ECG, and PPG can provide accurate RR in premature infants within a specific range.
    • Indirect methods (ECG, PPG) face challenges in accurately measuring high respiratory rates in this population.

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