title: Noninvasive biomagnetic detection of isolated ischemic bowel segments.
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.
authors: Department of General Surgery and Physics and Astronomy, Vanderbilt University, Nashville, TN 37232, USA. suseela.somarajan@vanderbilt.edu
authors: Suseela
authors: S
authors: Somarajan
authors: Summer
authors: S
authors: Cassilly
authors: Chibuike
authors: C
authors: Obioha
authors: L A
authors: LA
authors: Bradshaw
authors: William O
authors: WO
authors: Richards
mesh_terms: D000818:Animals; D004566:Electrodes; D004568:Electrodiagnosis / Q000379:methods*; D005769:Gastrointestinal Motility / Q000502:physiology; D007421:Intestine, Small / Q000502:physiology* / Q000503:physiopathology; D007511:Ischemia / Q000175:diagnosis* / Q000503:physiopathology; D060306:Magnetometry / Q000379:methods*; D012815:Signal Processing, Computer-Assisted; D013552:Swine