Closely spaced fibre bragg grating sensors for detailed measurement of peristalsis in the human gut

John W. Arkwright, Phil G. Dinning, Ian D. Underhill, Simon A. Maunder, Neil Blenman, Michael M. Szczesniak, Ian J. Cook

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


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.
Original languageEnglish
Title of host publication20th International Conference on Optical Fibre Sensors
Number of pages4
ISBN (Print)9780819478146
Publication statusPublished - Oct 2009
Externally publishedYes
Event20th International Conference on Optical Fibre Sensors - Edinburgh, United Kingdom
Duration: 5 Oct 20099 Oct 2009

Publication series

NameProceedings of SPIE
NumberPart One
VolumeVolume 7503
ISSN (Print)0277-786X


Conference20th International Conference on Optical Fibre Sensors
Country/TerritoryUnited Kingdom


  • Bragg grating
  • manometry catheters
  • pressure sensors
  • oesophagus
  • colon


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