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Related Experiment Videos

Intestinal tone and gas motion.

F Tremolaterra1, A Villoria, J Serra

  • 1Digestive System Research Unit, Hospital General Vall d'Hebron, Autonomous University of Barcelona, Barcelona, Spain.

Neurogastroenterology and Motility
|September 12, 2006
PubMed
Summary
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Intestinal gas expulsion is driven by gut wall tone changes, not contractions. Gas infusion triggers duodenal contraction, enhancing gas evacuation and reducing intestinal capacitance.

Area of Science:

  • Gastroenterology
  • Digestive Physiology

Background:

  • Intestinal gas evacuation occurs without detectable phasic contractions.
  • The mechanisms of intestinal gas propulsion remain unclear.

Purpose of the Study:

  • To investigate the role of gut tone and capacitance in intestinal gas motion.
  • To determine the physiological response to intestinal gas infusion.

Main Methods:

  • 13 healthy subjects underwent duodenal lipid perfusion monitored by barostat.
  • Jejunal gas (N2, CO2, O2) or sham infusion was administered.
  • Gas outflow was measured via an intrarectal cannula.

Main Results:

  • Lipid perfusion induced duodenal relaxation (48% volume increase).

Related Experiment Videos

  • Gas infusion significantly increased gas evacuation (184 mL) associated with duodenal tonic contraction, reversing relaxation.
  • Sham infusion resulted in minimal gas evacuation (52 mL) with sustained duodenal relaxation.

    • Conclusions:

    • Intestinal gas propulsion and clearance are mediated by tonic gut wall contraction.
    • Reduced gut capacitance is associated with efficient intestinal gas transit.