Highly sensitive contact pressure measurements using FBG patch in endotracheal tube cuff
Correia, R. and Blackman, O.R. and Hernandez, F.U. and Korposh, S. and Morgan, S.P. and Hayes-Gill, B. and James, S.W. and Evans, D. and Norris, A. (2016) Highly sensitive contact pressure measurements using FBG patch in endotracheal tube cuff. In: Sixth European Workshop on Optical Fibre Sensors, 31 May - 03 June 2016, Limerick, Ireland.
Official URL: http://dx.doi.org/10.1117/12.2236859
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. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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