Highly sensitive contact pressure measurements using FBG patch in endotracheal tube cuff

R. Correia; O. R. Blackman; F. U. Hernandez; S. Korposh; S. P. Morgan; B. R. Hayes-Gill; S. W. James; D. Evans; A. Norris

doi:10.1117/12.2236859

30 May 2016 Highly sensitive contact pressure measurements using FBG patch in endotracheal tube cuff

R. Correia, O. R. Blackman, F. U. Hernandez, S. Korposh, S. P. Morgan, B. R. Hayes-Gill, S. W. James, D. Evans, A. Norris

Author Affiliations +

Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 99161F (2016) https://doi.org/10.1117/12.2236859
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland

Abstract

A method for measuring the contact pressure between an endotracheal tube cuff and the trachea was designed and developed by using a fibre Bragg grating (FBG) based optical fibre sensor. The FBG sensor is encased in an epoxy based UV-cured cuboid patch and transduces the transversely loaded pressure into an axial strain that induces wavelength shift of the Bragg reflection. The polymer patch was created by using a PTFE based mould and increases tensile strength and sensitivity of the bare fibre FBG to pressure to 2.10×10-2 nm/kPa. The characteristics of the FBG patch allow for continuous measurement of contact pressure. The measurement of contact pressure was demonstrated by the use of a 3D printed model of a human trachea. The influence of temperature on the measurements is reduced significantly by the use of a second FBG sensor patch that is not in contact with the trachea. Intracuff pressure measurements performed using a commercial manometer agreed well with the FBG contact pressure measurements.

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R. Correia, O. R. Blackman, F. U. Hernandez, S. Korposh, S. P. Morgan, B. R. Hayes-Gill, S. W. James, D. Evans, and A. Norris "Highly sensitive contact pressure measurements using FBG patch in endotracheal tube cuff ", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99161F (30 May 2016); https://doi.org/10.1117/12.2236859

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