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An experimental manometric study simulating upper esophageal sphincter narrowing

R Olsson1, H Nilsson, O Ekberg

  • 1Department of Diagnostic Radiology, Malmö General Hospital, Sweden.

Investigative Radiology
|June 1, 1994
PubMed
Summary
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Elevated intrabolus pressure is significant in pharyngeal narrowing. This pressure depends on sensor position, narrowing degree, bolus properties, and flow rate, making evaluation complex.

Area of Science:

  • Gastroenterology and Swallowing Physiology

Background:

  • Cricopharyngeal bars are associated with elevated intrabolus pressure.
  • Understanding pressure dynamics in pharyngeal narrowing is crucial for diagnosing swallowing disorders.

Purpose of the Study:

  • To investigate intraluminal pressure characteristics in a laboratory model simulating pharyngeal narrowing.
  • To determine the factors influencing intrabolus pressure around lumen narrowings.

Main Methods:

  • Intraluminal solid-state manometry was employed in an experimental setup.
  • Variable lumen narrowing was created using an expandable balloon to simulate pharyngeal walls.

Main Results:

  • Intrabolus pressure varied significantly based on manometric sensor position.
  • Pressure was also influenced by the degree of lumen narrowing, bolus volume, flow rate, and fluid viscosity.

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Conclusions:

  • Elevated intrabolus pressure is a key finding in pharyngeal narrowing.
  • The complex dependency of intrabolus pressure on multiple parameters necessitates careful evaluation.
  • Standardized pharyngeal manometry requires precise sensor positioning and concurrent fluoroscopy.