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23 May 2023 Optical fibre catheter for gastroesophageal pressure, pH, and bile measurements
F. Baldini, F. Chiavaioli, G. Bartolozzi, K. Schroeder, T. Habisreuther, M. Hahn, M. Satzke, S. Goerlich, J. Gäbler, A. Taddei, P. Cecchi, D. Bovio
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Proceedings Volume 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023); 126430V (2023) https://doi.org/10.1117/12.2680507
Event: European Workshop on Optical Fibre Sensors (EWOFS 2023), 2023, Mons, Belgium
Abstract
Esophageal pressure, bile content and pH are important parameters in gastroesophageal diseases. An all-optical technology is described to perform simultaneously oesophageal manometry, pH-metry and bilimetry. The pressure measurement along the oesophagus is performed with 11 fibre optic gratings (FBGs) within a single mode fibre, which ensures monitoring every 2.5 cm along the oesophagus. The bile measurement is based on the direct absorption of bilirubin, the main biliary pigment, using a bundle of plastic optical fibres (POFs) carrying the signal. Regarding the detection of pH, an acid-base indicator that modifies its absorption as a function of pH is immobilized on glass particles with controlled porosity immobilized at the end of two POFs. The sensors are integrated in the same catheter for the simultaneous measurement of the three parameters. The prototype for the catheter interrogation was designed and developed, constituted by the integration of two optoelectronic modules for the interrogation of the pressure sensor and for the bile and pH sensors, respectively.
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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F. Baldini, F. Chiavaioli, G. Bartolozzi, K. Schroeder, T. Habisreuther, M. Hahn, M. Satzke, S. Goerlich, J. Gäbler, A. Taddei, P. Cecchi, and D. Bovio "Optical fibre catheter for gastroesophageal pressure, pH, and bile measurements", Proc. SPIE 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023), 126430V (23 May 2023); https://doi.org/10.1117/12.2680507
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KEYWORDS
Sensors
Optical fibers
Fiber Bragg gratings
Absorption
Optical sensors
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