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Related Experiment Videos

Assessment of gastric volume changes with sonometry compared with barostat.

H Ouyang1, J D Z Chen

  • 1Transneuronix and Veterans Research and Education Foundation, Oklahoma City, OK, USA.

Neurogastroenterology and Motility
|May 27, 2005
PubMed
Summary

Sonometry accurately measures gastric volumes, showing reproducible results comparable to a gastric barostat. This technique is validated for detecting changes due to food, distension, and electrical stimulation.

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Area of Science:

  • Gastroenterology
  • Medical Devices
  • Physiology

Background:

  • Assessing gastric volume is crucial for understanding digestive function.
  • Current methods like gastric barostat have limitations.
  • Sonometry offers a potential non-invasive alternative.

Purpose of the Study:

  • To validate sonometry for measuring gastric volumes.
  • To compare sonometry's accuracy against a gastric barostat.
  • To assess sonometry's response to various gastric stimuli.

Main Methods:

  • Six dogs underwent surgery for gastric implantation of sonometric sensors and electrodes.
  • Gastric volumes were manipulated using intragastric balloons and food.
  • Gastric electrical stimulation was applied to assess sensor response.

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Main Results:

  • Sonometry demonstrated reproducible and stable measurements of sensor distance.
  • A strong correlation was found between sonometric sensor distance and barostat-measured gastric volume.
  • Sonometry reflected similar postprandial responses to the barostat, with or without an intragastric balloon.

Conclusions:

  • Sonometry is a valid tool for assessing gastric volume changes.
  • The technique is responsive to gastric distension, food ingestion, and electrical stimulation.
  • Intragastric balloons amplify the detected postprandial gastric volume increase.