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A Device that Models Human Swallowing.

M Stading1,2, M Q Waqas3,4, F Holmberg5

  • 1Agrifood and Bioscience Product Design and Perception, RISE Research Institutes of Sweden AB, Göteborg, Sweden. Mats.Stading@ri.se.

Dysphagia
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Summary
This summary is machine-generated.

This study introduces an in vitro swallowing model to explore rheology

Keywords:
DeglutitionDeglutition disordersIn vitroManometryPharynxRheologyShear rate

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Area of Science:

  • Biomedical Engineering
  • Fluid Dynamics
  • Gastroenterology

Background:

  • The pharynx is essential for coordinated swallowing of air and food.
  • Aberrant coordination leads to dysphagia (swallowing disorders).
  • Understanding rheology's role in swallowing is crucial for dysphagia research.

Purpose of the Study:

  • To develop an in vitro model simulating human pharyngeal swallowing.
  • To investigate the role of rheology in swallowing mechanics.
  • To create a pre-clinical tool for simulating dysphagia.

Main Methods:

  • Designed an in vitro model based on human pharyngeal geometry.
  • Utilized manometry for pressure measurements.
  • Employed ultrasonic analysis for bolus flow profiles and shear rate determination.
  • Automated bolus injection, epiglottis/nasopharynx movement, and airway/sphincter simulations.

Main Results:

  • Validated model accuracy through continuous and bolus flow tests.
  • Characterized bolus velocity profiles, essential for flow dynamics.
  • Measured a maximum bolus shear rate of 80 s⁻¹ for syrup-like fluids.
  • Manometry data showed strong correlation with clinical studies.

Conclusions:

  • The developed in vitro model accurately simulates pharyngeal swallowing.
  • The model provides vital rheological data (shear rate) for dysphagia research.
  • This tool aids in understanding swallowing disorders and testing interventions.