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Related Concept Videos

Gastrointestinal Motility Disorders01:20

Gastrointestinal Motility Disorders

Gastrointestinal or GI motility disorders are characterized by irregular gastrointestinal tract movements, disrupting food transit from the mouth to the anus. They are caused by damage or dysfunction in gut muscles or nerves. These disorders can cause symptoms such as severe constipation, diarrhea, abdominal pain, and swallowing difficulties. Disorders can affect any segment of the GI tract and range widely in severity, from common conditions like GERD to life-threatening conditions like...
Gastric Motility01:16

Gastric Motility

Gastric motility is the coordinated contraction and relaxation of stomach muscles that convert ingested food into chyme, a semi-liquid substance ready for further digestion in the intestines. The process begins with the vagus nerve inducing the relaxation of the smooth muscles in the fundus and body of the stomach, allowing these regions to expand and accommodate up to approximately 1.5 liters of food and liquid.
Peristaltic Waves and Chyme Formation
Upon food entry, the stomach initiates...
Gastric Emptying01:16

Gastric Emptying

Gastric emptying occurs when the stomach gradually releases chyme into the duodenum. When the stomach is distended, it triggers the release of gastrin, a hormone that promotes gastric acid secretion to aid in digestion. Additionally, stomach distension contributes to peristaltic waves that propel gastric contents toward the pyloric region. The gastroenteric reflex, on the other hand, primarily stimulates peristalsis in the intestines, facilitating the movement of contents further along the...
Assessment of the Gastrointestinal System II: Health Perception Pattern01:29

Assessment of the Gastrointestinal System II: Health Perception Pattern

Assessing the gastrointestinal (GI) system is a complex process that begins with collecting subjective data. This data, collected through patient interviews, provides crucial insights into the patient's health history, perception patterns, and lifestyle habits, all contributing significantly to GI health.
Health Perception Patterns
Health perception patterns offer valuable insights into a patient's lifestyle habits and how they may impact their GI health. These patterns include:
Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and solid...
Pyloric Obstruction01:11

Pyloric Obstruction

Pyloric obstruction, also referred to as gastric outlet obstruction, is a condition characterized by narrowing or blockage at the pylorus—the muscular valve regulating the flow of stomach contents into the duodenum. When this passage becomes impaired, the stomach cannot effectively empty its contents into the small intestine. This disruption leads to a range of gastrointestinal symptoms, including early satiety, bloating, epigastric pain, postprandial nausea, persistent vomiting, and...

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Related Experiment Video

Updated: Jul 12, 2026

Assessment of Gastric Emptying in Non-obese Diabetic Mice Using a [13C]-octanoic Acid Breath Test
12:24

Assessment of Gastric Emptying in Non-obese Diabetic Mice Using a [13C]-octanoic Acid Breath Test

Published on: March 23, 2013

Gastric emptying measurements: delayed and complex emptying patterns without appropriate correction.

J G Moore, P E Christian, A T Taylor

    Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
    |October 1, 1985
    PubMed
    Summary

    Geometric mean correction is essential for accurately measuring solid gastric emptying rates using radioisotopic-labeled meals. Anterior data alone underestimates solid emptying and shows a false delay, unlike corrected data.

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    Fabrication and Implantation of Miniature Dual-element Strain Gages for Measuring In Vivo Gastrointestinal Contractions in Rodents.
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    Fabrication and Implantation of Miniature Dual-element Strain Gages for Measuring In Vivo Gastrointestinal Contractions in Rodents.

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    Gastric Point of Care Ultrasound in Adults: Image Acquisition and Interpretation
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    Gastric Point of Care Ultrasound in Adults: Image Acquisition and Interpretation

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    Last Updated: Jul 12, 2026

    Assessment of Gastric Emptying in Non-obese Diabetic Mice Using a [13C]-octanoic Acid Breath Test
    12:24

    Assessment of Gastric Emptying in Non-obese Diabetic Mice Using a [13C]-octanoic Acid Breath Test

    Published on: March 23, 2013

    Fabrication and Implantation of Miniature Dual-element Strain Gages for Measuring In Vivo Gastrointestinal Contractions in Rodents.
    09:29

    Fabrication and Implantation of Miniature Dual-element Strain Gages for Measuring In Vivo Gastrointestinal Contractions in Rodents.

    Published on: September 18, 2014

    Gastric Point of Care Ultrasound in Adults: Image Acquisition and Interpretation
    05:50

    Gastric Point of Care Ultrasound in Adults: Image Acquisition and Interpretation

    Published on: September 22, 2023

    Area of Science:

    • Nuclear Medicine
    • Gastroenterology
    • Medical Imaging

    Background:

    • Gastric emptying studies are crucial for diagnosing gastrointestinal motility disorders.
    • Accurate assessment of gastric emptying rates is vital for effective patient management.
    • Previous methods using anterior data alone may introduce inaccuracies.

    Purpose of the Study:

    • To compare gastric emptying curves derived from anterior-only data versus geometric mean corrected data.
    • To evaluate the impact of meal size on gastric emptying measurements.
    • To determine the necessity of geometric mean correction for accurate radioisotopic gastric emptying assessments.

    Main Methods:

    • 37 subjects were studied using 61 radioisotopic-labeled solid and liquid meals of varying sizes.
    • Gastric emptying was assessed using anteriorly acquired data and geometric mean corrected data.
    • Comparison of emptying curves and rates between the two acquisition methods.

    Main Results:

    • Anterior data alone significantly underestimated solid-phase gastric emptying rates across all meal sizes.
    • Geometric mean correction linearized solid-phase emptying curves and eliminated an apparent delay.
    • Slight differences were observed for liquid emptying rates between methods, likely due to photon attenuation differences.

    Conclusions:

    • Geometric mean correction techniques are necessary for accurate assessment of radioisotopic-labeled solid meals.
    • Anterior data alone can lead to misinterpretation of solid gastric emptying dynamics.
    • The findings support the routine use of geometric mean correction in gastric emptying studies.