Noninvasive Biomagnetic Detection of Isolated Ischemic Bowel Segments

Author

Somarajan, S. ; Cassilly, S. ; Obioha, C. ; Bradshaw, L.A. ; Richards, W.O.

Author_Institution

Dept. of Gen. Surg. & Phys. & Astron., Vanderbilt Univ., Nashville, TN, USA

Volume

60

Issue

6

fYear

2013

fDate

Jun-13

Firstpage

1677

Lastpage

1684

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.

Keywords

biomagnetism; biomedical imaging; electromyography; MENG recordings; electrical activity; enteric slow wave activity; isolated ischemic bowel segments; isolated small bowel segments; magnetoenterogram; noninvasive biomagnetic detection; normal porcine subjects; segmental intestinal ischemia; serosal EMG; serosal electromyograms; Electrodes; Electromyography; SQUIDs; Sensor arrays; Spectral analysis; Electroenterogram (EENG); magnetoenterogram (MENG); slow wave; superconducting quantum interference device (SQUID) magnetometer; Animals; Electrodes; Electrodiagnosis; Gastrointestinal Motility; Intestine, Small; Ischemia; Magnetometry; Signal Processing, Computer-Assisted; Swine;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/TBME.2013.2240454

Filename

6412780