30 May 2016 Highly sensitive contact pressure measurements using FBG patch in endotracheal tube cuff
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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, 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); doi: 10.1117/12.2236859; https://doi.org/10.1117/12.2236859
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