Measurement of the longitudinal and circumferential muscular activity associated with peristalsis using a single fibre grating array

J. W. Arkwright; N. G. Blenman; I. D. Underhill; S. A. Maunder; N. J. Spencer; M. Costa; S. J. Brooks; M. M. Szczesniak; P. G. Dinning

doi:10.1117/12.866307

8 September 2010 Measurement of the longitudinal and circumferential muscular activity associated with peristalsis using a single fibre grating array

J. W. Arkwright, N. G. Blenman, I. D. Underhill, S. A. Maunder, N. J. Spencer, M. Costa, S. J. Brooks, M. M. Szczesniak, P. G. Dinning

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Proceedings Volume 7653, Fourth European Workshop on Optical Fibre Sensors; 765330 (2010) https://doi.org/10.1117/12.866307
Event: (EWOFS'10) Fourth European Workshop on Optical Fibre Sensors, 2010, Porto, Portugal

Abstract

Diagnostic catheters based on fibre Bragg gratings (FBG's) are proving to be highly effective for measurement of the muscular activity associated with peristalsis in the human gut. The primary muscular contractions that generate peristalsis are circumferential in nature; however, it has long been known that there is also a component of longitudinal contractility present, acting in harmony with the circumferential component to improve the overall efficiency of material movement. To date, there have been relatively few reports on the measurement or inference of longitudinal contractions in humans and all have been limited to detection at a single location only. This is due to the lack of a viable recording technique suitable for real-time in-vivo measurement of this type of activity over extended lengths of the gut. We report the detection of longitudinal motion in lengths of excised mammalian colon using an FBG technique that should be viable for similar detection in humans. The longitudinal sensors have been combined with our previously reported FBG pressure sensing elements to form a composite catheter that allows the relative phase between the two components to be detected. The catheter output has been validated using digital video mapping in an ex-vivo animal preparation using lengths of rabbit ileum.

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J. W. Arkwright, N. G. Blenman, I. D. Underhill, S. A. Maunder, N. J. Spencer, M. Costa, S. J. Brooks, M. M. Szczesniak, and P. G. Dinning "Measurement of the longitudinal and circumferential muscular activity associated with peristalsis using a single fibre grating array", Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 765330 (8 September 2010); https://doi.org/10.1117/12.866307

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KEYWORDS

Sensors

Fiber Bragg gratings

Video

Cameras

Composites

Chemical elements

Diagnostics

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