Identifying oesophageal contents using electrical impedance tomography.
Investigations have been carried out using the Sheffield mark II real-time EIT system, to look at changes in conductivity associated with swallowing. A ring of 16 electrodes was placed around the neck of 10 subjects, who then performed swallows with four liquids of different conductivities, ranging from water (sigma = 0.03 mS cm-1) to salty soup (sigma = 35.8 mS cm-1). Results showed that the conductive and non-conductive liquids could be distinguished. Bolus transit times were calculated from region of interest curves, and the average transit time for the 10 subjects was found to be 320 +/- 100 ms.
Erol
R A
RA
Department of Medical Physics and Clinical Engineering, University of Sheffield, Royal Hallamshire Hospital, UK.
Mangnall
Y
Y
Leathard
A D
AD
Smallwood
R H
RH
Brown
B H
BH
Cherian
P
P
Bardhan
K D
KD
D003679:Deglutition / Q000502:physiology*; D017097:Electric Impedance; D004566:Electrodes; D004947:Esophagus / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male