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Detecting oesophageal-related changes using electrical impedance tomography

R A Erol1, R H Smallwood, B H Brown

  • 1Department of Medical Physics and Clinical Engineering, Royal Hallamshire Hospital, Sheffield, UK.

Physiological Measurement
|August 1, 1995
PubMed
Summary
This summary is machine-generated.

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Electrical impedance tomography (EIT) can detect conductivity changes in the esophagus and stomach after swallowing. Three EIT electrode configurations effectively differentiate between conducting and non-conducting liquids.

Area of Science:

  • Medical Imaging
  • Physiological Monitoring

Background:

  • Electrical Impedance Tomography (EIT) is a non-invasive imaging technique.
  • Previous studies have explored EIT for various physiological applications.

Purpose of the Study:

  • To investigate the feasibility of using real-time EIT to detect conductivity changes in the esophagus and stomach.
  • To evaluate the effectiveness of different EIT electrode configurations for this purpose.

Main Methods:

  • Utilized the Sheffield mark II real-time EIT system.
  • Administered small volumes of conducting and non-conducting liquids via swallow.
  • Employed three distinct electrode configurations: transverse thoracic, abdominal rosette, and dorsal rosette.

Main Results:

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  • A significant difference in conductivity was observed between the two types of liquids.
  • All three electrode configurations demonstrated equal efficacy in detecting this difference.
  • Real-time EIT successfully identified conductivity changes post-swallow.

Conclusions:

  • Real-time EIT is a viable method for detecting esophageal and gastric conductivity changes.
  • The choice of electrode configuration does not significantly impact the detection of liquid conductivity differences.
  • EIT shows promise for monitoring gastrointestinal function.