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Methodological factors affecting esophageal clearance

I Kane1, M Bouchoucha, A A Moukarzel

  • 1Département d'Hépato-gastroentérologie, Hopital Laënnec, Paris, France.

Archives of Physiology and Biochemistry
|January 1, 1996
PubMed
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Investigating esophageal clearance, this study found a naso-esophageal probe reduces swallowing frequency. Esophageal clearance depends exponentially on pH and increases with volumes over 30 ml.

Area of Science:

  • Gastroenterology
  • Physiology

Background:

  • Accurate measurement of esophageal clearance is crucial for understanding esophageal function.
  • Methodological factors can significantly influence esophageal clearance measurements.

Purpose of the Study:

  • To investigate the impact of methodological factors on esophageal clearance measurement.
  • To propose a new quantitative method for evaluating esophageal clearance.

Main Methods:

  • Three protocols were used on 41 healthy subjects.
  • Studied the influence of naso-esophageal probe on swallowing frequency.
  • Examined the effect of esophageal content pH and volume on clearance.

Main Results:

  • A naso-esophageal probe decreased spontaneous swallowing frequency by 44%.

Related Experiment Videos

  • Esophageal clearance showed an exponential relationship with initial pH (C = 43.3 exp (-0.54 pH)).
  • Clearance increased significantly for esophageal volumes > 30 ml, with no effect below this threshold.

    • Conclusions:

    • The esophagus exhibits an accommodation phase following distension by a naso-gastric probe.
    • A new quantitative method for esophageal clearance evaluation is proposed.
    • Ingested volume has limited importance for esophageal clearance beyond 30 ml.