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Proceedings Paper

Closely spaced fibre Bragg grating sensors for detailed measurement of peristalsis in the human gut
Author(s): John W. Arkwright; Phil G Dinning; Ian D. Underhill; Simon A. Maunder; Neil Blenman; Michal M. Szczesniak; Ian J. Cook
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Paper Abstract

We report the design and use of multi-channel fibre Bragg grating based manometry catheters with pressure sensors spaced at 1 cm intervals along its axis. The catheters have been tested in-vivo in both the human oesophagus and colon and have been shown to provide analogous results to commercially available solid state pressure sensors. The advantage of using fibre gratings comes from the ability to extend the number of sensor elements without increasing the diameter or complexity of the catheter or data acquisition system. We present our progress towards the fabrication of a manometry catheter suitable for recording manometric data along the full length of the human colon. Results from early phase equivalence testing and recent in-vivo trials in the human oesophagus and colon are presented. The colonic recordings were taken in basal and post-prandial periods of 2.5 hours each. The close axial spacing of the pressure sensors has identified the complex nature of propagating sequences in the colon in both antegrade (towards the anus) and retrograde (away from the anus) for the first time. By sub-sampling the data using data from sensors 7 cm apart the potential to misrepresent propagating sequences at wider sensor spacings is demonstrated and proposed as a potential reason why correlation between peristaltic abnormalities recorded using traditional catheters, with 7.5-10 cm spaced sensors, and actual patient symptoms remains elusive.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75030V (5 October 2009); doi: 10.1117/12.833678
Show Author Affiliations
John W. Arkwright, CSIRO (Australia)
Phil G Dinning, St. George Hospital, Univ. of New South Wales (Australia)
Ian D. Underhill, CSIRO (Australia)
Simon A. Maunder, CSIRO (Australia)
Neil Blenman, CSIRO (Australia)
Michal M. Szczesniak, St. George Hospital, Univ. of New South Wales (Australia)
Ian J. Cook, St. George Hospital, Univ. of New South Wales (Australia)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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