Related Experiment Video
Updated: May 15, 2026
Multimodality Diagnosis of Mesenteric Ischemia
Published on: July 21, 2023
Noninvasive biomagnetic detection of isolated ischemic bowel segments
Suseela Somarajan1, Summer Cassilly, Chibuike Obioha
1Department of General Surgery and Physics and Astronomy, Vanderbilt University, Nashville, TN 37232, USA. suseela.somarajan@vanderbilt.edu
Abstract:
The slow wave activity was measured in the magnetoenterogram (MENG) of normal porcine subjects (N = 5) with segmental intestinal ischemia. The correlation changes in enteric slow wave activity were determined in MENG and serosal electromyograms (EMG). MENG recordings show significant changes in the frequency and power distribution of enteric slow-wave signals during segmental ischemia, and these changes agree with changes observed in the serosal EMG. There was a high degree of correlation between the frequency of the electrical activity recorded in MENG and in serosal EMG (r = 0.97). The percentage of power distributed in brady- and normoenteric frequency ranges exhibited significant segmental ischemic changes. Our results suggest that noninvasive MENG detects ischemic changes in isolated small bowel segments.
Insights
Magnetoenterography (MENG) noninvasively detects intestinal ischemia by measuring changes in slow wave activity. This technique shows high correlation with traditional electromyography (EMG) in pigs.
Area of Science:
- Gastroenterology
- Biomedical Engineering
- Physiology
Background:
- Enteric slow wave activity is crucial for intestinal motility.
- Segmental intestinal ischemia significantly alters electrical activity.
- Noninvasive monitoring of intestinal electrical activity is needed.
Purpose of the Study:
- To evaluate magnetoenterography (MENG) for detecting changes in enteric slow wave activity during segmental intestinal ischemia.
- To correlate MENG findings with serosal electromyograms (EMG).
Main Methods:
- Slow wave activity was measured using MENG in normal porcine subjects (N=5) with induced segmental intestinal ischemia.
- Enteric slow wave activity in MENG was compared with serosal EMG recordings.
- Frequency and power distribution of slow-wave signals were analyzed.
Main Results:
- MENG recordings showed significant changes in the frequency and power distribution of enteric slow-wave signals during ischemia.
- These MENG changes correlated highly with those observed in serosal EMG (r=0.97).
- Significant ischemic changes were observed in the power distribution within brady- and normoenteric frequency ranges.
Conclusions:
- Noninvasive MENG can effectively detect ischemic changes in isolated small bowel segments.
- MENG shows promise as a diagnostic tool for intestinal ischemia.
- MENG findings are consistent with traditional EMG measurements.
More Related Videos
09:59A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia
Published on: September 16, 2017
18:11A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
Published on: December 28, 2012
