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Gastric Emptying01:16

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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...
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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
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The gastric phase of digestion begins as soon as food enters the stomach. The incoming food bolus triggers neural and hormonal mechanisms, which last approximately 3 to 4 hours. During this phase, the stomach undergoes significant changes to prepare the food for further digestion and absorption.
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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
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Related Experiment Video

Updated: Sep 1, 2025

Author Spotlight: Point-of-Care Ultrasound for Gastric Content Assessment and Risk Stratification in Perioperative Care
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Abdominal Morphologic Changes in MRI during Gastric Balloon Therapy.

Rebecca Keßler1, Anne Glitsch2, Björn Hübner2

  • 1Department of Diagnostic Radiology and Neuroradiology, University Medical Center Greifswald, Greifswald, Germany.

Obesity Facts
|August 16, 2022
PubMed
Summary

Gastric balloon therapy effectively reduces body fat and liver volume, but also leads to significant muscle mass loss. This reversible endoscopic method aids weight reduction when other options fail.

Keywords:
Fatty tissueGastric balloonLiver volumeObesitySarcopenic adiposity

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Area of Science:

  • Bariatric Endoscopy
  • Medical Imaging
  • Body Composition Analysis

Background:

  • Rising rates of obesity in industrialized nations necessitate effective weight management strategies.
  • Gastric balloon therapy offers a safe, reversible endoscopic alternative for patients unsuitable for or delaying surgery.

Purpose of the Study:

  • To evaluate changes in abdominal fat compartments, liver lobe volume, and muscle mass during gastric balloon therapy.
  • To assess gastric balloon fill volume and performance throughout treatment.

Main Methods:

  • Magnetic Resonance Imaging (MRI) to quantify abdominal fat depots (subcutaneous, visceral, renal capsule).
  • Measurement of left liver lobe volume and psoas muscle area.
  • Analysis of gastric balloon fill volume and stability.

Main Results:

  • Significant reductions observed in subcutaneous fat, renal capsule fat, and intra-abdominal fat.
  • A decrease in left liver lobe volume and psoas muscle area (muscle loss) was noted.
  • Gastric balloon volume remained stable, with variable gas bubble presence.

Conclusions:

  • Gastric balloon therapy is a successful temporary option for weight reduction, decreasing body fat and liver volume.
  • The therapy also results in a loss of muscle mass, a critical consideration for patient management.