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Quantitative classification of pediatric swallowing through accelerometry.

Celeste Merey1, Azadeh Kushki, Ervin Sejdić

  • 1Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada. celeste.merey@utoronto.ca

Journal of Neuroengineering and Rehabilitation
|June 12, 2012
PubMed
Summary
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Dual-axis accelerometry shows promise for non-invasively detecting unsafe swallows in children with dysphagia. This portable method could offer a cost-effective alternative to traditional radiation-based assessments.

Area of Science:

  • Biomedical Engineering
  • Pediatric Medicine
  • Clinical Diagnostics

Background:

  • Pediatric dysphagia significantly impacts child health and development.
  • Videofluoroscopy, the current standard, involves radiation and specialized resources, limiting frequent assessments.
  • Swallowing accelerometry offers a non-invasive, portable, and potentially cost-effective bedside alternative.

Purpose of the Study:

  • To evaluate the efficacy of dual-axis swallowing accelerometry for detecting unsafe swallows in pediatric patients.
  • To assess the potential of this non-invasive technique as a screening tool in children with neurogenic dysphagia.

Main Methods:

  • Collected dual-axis accelerometric signals simultaneously with videofluoroscopy in 29 pediatric participants with neurogenic dysphagia.

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  • Analyzed swallows of various consistencies using feature extraction from time, frequency, and information theoretic domains.
  • Reduced feature space dimensionality and employed a support vector machine classifier for discrimination.

    • Main Results:

    • Achieved an adjusted accuracy of 89.6% ± 0.9 in discriminating between safe and unsafe swallows (airway entry).
    • Utilized 8-fold cross-validation with 16-17 dimensions and an RBF kernel support vector machine.
    • Demonstrated the potential of accelerometric signal analysis for identifying aspiration events.

    Conclusions:

    • Dual-axis accelerometry shows significant merit for the non-invasive detection of unsafe swallows in children.
    • This technology warrants further investigation as a valuable pediatric medical device for dysphagia assessment.
    • Offers a promising radiation-free alternative for routine swallowing function monitoring in pediatric populations.