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Related Experiment Video

Updated: Jan 30, 2026

Coordinate Mapping of Hyolaryngeal Mechanics in Swallowing
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Methods for measuring swallowing pressure variability using high-resolution manometry.

Corinne A Jones1,2,3, Ellen L Meisner1,4, Courtney K Broadfoot1,2

  • 1Department of Surgery, Division of Otolaryngology-Head & Neck Surgery, University of Wisconsin - Madison, Madison, WI, USA.

Frontiers in Applied Mathematics and Statistics
|January 29, 2019
PubMed
Summary

Swallowing pressure variability analysis requires a specific method. A coefficient of variability (CV) on adjusted waveforms is best for measuring oropharyngeal swallowing pressure, impacting safety.

Keywords:
deglutitionhigh-resolution manometrypharyngeal pressurepressurevariability

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Area of Science:

  • Physiology
  • Biomechanics
  • Sensorimotor Control

Background:

  • Repeated movements exhibit inter-trial variability.
  • Oropharyngeal swallowing is a complex sensorimotor action where variability impacts safety.
  • Quantifying swallow-to-swallow variability is crucial for understanding swallowing function.

Purpose of the Study:

  • To identify an appropriate method for measuring swallowing pressure waveform variability.
  • To assess the impact of waveform alignment, pharyngeal region, and data set size on variability.
  • To establish a reliable metric sensitive to amplitude, duration, and shape deviations.

Main Methods:

  • Systematic analysis of model waveforms to determine the best variability metric.
  • Application of the coefficient of variability (CV) on mean-zero adjusted waveforms.
  • Analysis of high-resolution manometry data from healthy individuals.

Main Results:

  • A coefficient of variability (CV) on adjusted waveforms is the most suitable metric.
  • Optimal waveform alignment occurs when the upper esophageal sphincter's superior sensor reaches half maximum pressure.
  • Swallowing pressures are least variable at the tongue base and most variable in the hypopharynx.
  • Sets of 2 swallows showed significantly less variability than larger sets (3-10 swallows).

Conclusions:

  • This study identifies significant variability in pharyngeal swallowing pressure waveforms in healthy adults.
  • The findings provide a robust method for analyzing swallowing pressure variability.
  • Understanding this variability offers insights into swallowing motor control and safety.