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Related Concept Videos

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.
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Related Experiment Video

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In vitro Functional Characterization of Mouse Colorectal Afferent Endings
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Local Myoelectric Sensing During Human Colonic Tissue Perfusion.

Matan Ben-David1,2,3, Raj Makwana4, Tal Yered2

  • 1Townsville Hospital and Health Service, Douglas, QLD 4814, Australia.

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Measuring the electrical activity of the colon can predict anastomotic leakage (AL) after colorectal surgery. The xBar system shows potential for assessing colonic perfusion and preventing AL complications.

Keywords:
anastomotic leakagehuman colon

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Area of Science:

  • Colorectal Surgery
  • Surgical Complications
  • Physiology

Background:

  • Anastomotic leakage (AL) is a severe complication following colorectal surgery.
  • Adequate perfusion at the anastomosis is critical for preventing AL.
  • Current methods for assessing perfusion are limited.

Purpose of the Study:

  • To evaluate the efficacy of measuring the electrical activity of the colonic muscularis externa for perfusion analysis.
  • To assess the potential of the xBar system in detecting changes in colonic perfusion during surgery.

Main Methods:

  • Human isolated colon strips were used to record spontaneous contractions and myoelectric activity.
  • The xBar system, a bipolar electrode array, was used to measure myoelectric data.
  • Intraoperative myoelectric signal assessment was performed before and after mesenteric artery ligation.

Main Results:

  • Hypoxia significantly inhibited contraction amplitude, duration, and frequency (>80%) in isolated colon.
  • Intraoperative assessment showed a significant decline in colonic spike rate after arterial ligation (112.64 to 51.13 spikes/min).
  • No adverse events were recorded, and the device did not impede the surgical procedure.

Conclusions:

  • Ischemia reduces the electrical activity and contraction force of the human colon.
  • The xBar system shows promise for intraoperative and postoperative monitoring of anastomotic viability.
  • This technology may help predict the risk of AL and prevent dehiscence.