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Updated: Jul 13, 2026
08:32
Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models
Published on: March 1, 2015
Esophageal bolus transit imaged by ultrafast computerized tomography
P Pouderoux1, G A Ergun, S Lin
1Department of Medicine, Northwestern University Medical School, Chicago, Illinois, USA.
Gastroenterology
|May 1, 1996
Summary
Swallowing involves significant air intake (aerophagia), with air often preceding liquid. Ultrafast CT imaging reveals this complex bolus composition and propulsion dynamics in the esophagus.
Area of Science:
- Gastroenterology
- Medical Imaging
- Physiology
Background:
- Conventional transit imaging visualizes only solid or liquid bolus components.
- Esophageal content dynamics during swallowing remain incompletely understood.
Purpose of the Study:
- To dynamically image the composition, distribution, and propulsion of esophageal contents during swallowing.
- To investigate aerophagia and bolus separation during esophageal transit.
Main Methods:
- Utilized ultrafast computerized tomography (CT) to acquire multiple adjacent cross-sectional images of the esophagus in 7 subjects.
- Analyzed synchronized images from 10-mL swallows to assess bolus distribution, propulsion, cross-sectional area, volume, and content.
Main Results:
- Swallowing involves both liquid and air, with variable distribution; air occupied 71% of the ampulla's luminal area.
- Air propelled ahead of liquid (17 cm/s vs. 7 cm/s) and accumulated in the ampulla, slowing mean bolus velocity.
- Significant aerophagia (8-32 mL) was observed during swallowing.
Conclusions:
- Ultrafast CT demonstrates substantial aerophagia and partial bolus separation, with air preceding fluid during esophageal transit.
- The esophageal ampulla showed greater distention due to bolus accumulation before hiatus transfer.
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